43rd International Conference on High Energy Physics

Jul 29, 2026, 3:00 PM → Aug 5, 2026, 7:10 PM America/Sao_Paulo

Natal Convention Center

Ignacio De Bediaga Hickman (CBPF - Brazilian Center for Physics Research (BR)), Rogerio Rosenfeld (UNESP - Universidade Estadual Paulista (BR))

43^rd International Conference on High Energy Physics

The International Conference on High Energy Physics (ICHEP) is the flagship event in the field of particle physics, organized under the auspices of the C11 commission of the International Union of Pure and Applied Physics (IUPAP). For over half a century, it has been held biennially, serving as the leading venue where groundbreaking results and discoveries are first unveiled.

Bringing together physicists from across the globe, ICHEP provides a platform to present and discuss the most recent developments in particle physics, astrophysics, cosmology, and accelerator science, as well as to shape the vision for the next generation of major research facilities.

Official website of the ICHEP 2026 conference: https://ichep2026.org/

Registration started in January 2026: please visit the Registration Guidelines.

ICHEP26 is in-person only, with the plenary sessions on Aug 3 - Aug 5 streamed live on Youtube (info).

 

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cert_Clara_Rojas.pdf

conference_poster.pdf

Natal_Guide_2026-07-20.pdf

Wed, July 29

3:00 PM → 8:00 PM Registration: Early registration

Thu, July 30

8:00 AM → 8:30 AM Registration: Day 1

8:30 AM → 10:15 AM Neutrino Physics

Conveners: J. Pedro Ochoa (Berkeley Lab), Liudmila Kolupaeva (Joint Institute for Nuclear Research (RU))

8:30 AM Preparing for a measurement of atmospheric neutrino oscillations in JUNO

Jiangmen Underground Neutrino Observatory (JUNO) is a multi-purpose experiment located in southern China. The detector is designed with 20-kton liquid scintillator and has started collecting full liquid scintillator data since August 2025. The main physics goal of JUNO is to determine the neutrino mass ordering (NMO) via a precise measurement of the reactor neutrino oscillation spectrum. Atmospheric neutrino oscillation measurement in JUNO can potentially provide independent sensitivity to NMO and increase JUNO’s total sensitivity in a joint analysis. This talk reports the recent progress made by JUNO towards a measurement of atmospheric neutrino oscillations, which has never been achieved by a liquid scintillator experiment before. The first observations of atmospheric neutrinos in JUNO and studies of atmospheric neutrinos' energy and direction reconstruction, event identification and background rejection are discussed.

Speaker: Hongyue Duyang (Shandong University)

duyang_ichep2026_atmo_v3.pdf

8:45 AM Latest results of the KM3NeT/ORCA telescope in the tau appearance measurement

KM3NeT is a next-generation research infrastructure housing the large scale neutrino telescopes in the Mediterranean sea. This facility comprises two detectors, KM3NeT/ARCA and KM3NeT/ORCA. These detectors consist of vertically-arranged detection units (230 and 115, respectively), each outfitted with 18 digital optical modules. The photomultipliers in the optical modules detect Cherenkov light induced by charged particles produced by neutrino interactions near the detector. KM3NeT/ARCA is optimized for the search of astrophysical neutrino sources in the range of TeV to PeV; whereas KM3NeT/ORCA is used to study the neutrino oscillation phenomena in the 1-100 GeV energy range.

This talk reports the results obtained from the data collected using various configurations of the KM3NeT/ORCA detector, corresponding to 5% to 15% of the final instrumented volume and 1.5Mton-years exposure. Through the study of the oscillation channel of the electron and muon atmospheric neutrino fluxes into tau neutrinos, a measurement of the normalisation factor, defined as the ratio between the number of observed and expected tau neutrinos, and their charged-current cross-sections are discussed. The event reconstruction, selection and analysis methods and future perspectives are also described.

Speaker: Ivan Mozun Mateo

Talk_ICHEP_2026_KM3NeT_IMozunMateo.pdf

9:00 AM Atmospheric Neutrino Oscillation Analysis with Super-Kamiokande

Super-Kamiokande (SK) is a 50-kton water-Cherenkov detector located in Japan. Since its construction in 1996, data collected by SK has been used to study oscillations of atmospheric neutrinos, which are sensitive to neutrino mass hierarchy and $\theta_{23}$, $\delta_{CP}$ parameters of the PMNS matrix. Starting in 2020, gadolinium has been introduced into SK’s water, increasing the neutron tagging efficiency.

In this talk, we will present the results of the latest SK’s atmospheric neutrino oscillation analysis, which incorporates SKI-VI data set (7076 live-days), increasing the total exposure by 9% with respect to the SKI-V analysis.

As SKVI is the first data taking period in the gadolinium loaded SK, this analysis takes advantage of the improved neutron tagging efficiency, which enhances the neutrino-antineutrino separation. The sensitivity of the oscillation analysis was further improved by implementing a neural network trained to identify tau neutrino events.

In addition to the zenith analysis, we will also present the results of SK’s atmospheric neutrino oscillation analysis, in which the oscillatory pattern of muon neutrino survival probability is studied directly as a function of the reconstructed neutrino flight length divided by the reconstructed neutrino energy.

Speaker: Mariusz Girgus

ICHEP2026SKresultsMGirgus.pdf

9:15 AM Selection algorithms development for atmospheric neutrino detection in the NOvA experiment

The NOvA experiment is designed to study accelerator neutrino oscillations. However, due to the design of its detectors (large size, high segmentation) and the flexibility of its data acquisition system configuration, NOvA also provides opportunities for investigating atmospheric neutrinos. Nevertheless, the selection of such events had not been carried out earlier in the experiment.
The primary data-taking phase of the NOvA experiment is scheduled to conclude in 2027. This creates a limited time window for developing and implementing new event selection methods.
This work presents a developed trigger algorithm capable of identifying both track-like and cascade-like (non-track) events characteristic of atmospheric neutrino interactions. Estimates of the algorithm's performance efficiency based on Monte Carlo simulation are provided, along with results from testing on previously collected unbiased NOvA experimental data.

Speaker: Aleksandra Ivanova (JINR)

ICHEP 2026.pdf

9:30 AM Predicting the Neutrino Mass Ordering Using Neural Networks

Determining the neutrino mass ordering remains one of the central open questions in particle physics. Although upcoming long baseline, atmospheric, and reactor neutrino experiments are expected to provide a definitive answer in the next decade, current data offer limited sensitivity, and the small spectral differences between the two hypotheses challenge traditional chi squared and likelihood based analyses, especially in the presence of parameter degeneracies.
In this talk, we will present a study exploring machine learning techniques as an alternative strategy for tackling the mass ordering problem. Using synthetic datasets constructed under realistic experimental assumptions, including matter effects and statistical fluctuations, we train a feedforward neural network to classify the normal and inverted neutrino mass ordering and to estimate the oscillation parameter Δm_31^2. The machine learning approach is benchmarked against standard likelihood based fits and other multivariate classifiers to enable a detailed comparison of methodologies.
We will describe the network architecture, training procedure, and validation workflow, as well as the criteria used to assess performance relative to established oscillation analysis techniques. The talk will also highlight how this framework interfaces with current analysis tools and how it can be extended as a pedagogical introduction to machine learning within neutrino physics.

Speaker: Dr Thiago Bezerra (University of Sussex)

20260730_3FML_ichep26_thiago.pdf

9:45 AM Neutrino oscillations in quantum field theory

We give an overview of the problems inherent in defining a full quantum field theory of neutrino oscillations (as opposed to phenomenological first-quantized approaches such as the Pontecorvo model).
We explain that a crucial issue is the vacuum basis choice, which, due to mismatch between Lorentz-irrep states and observable states, has difficulties absent in other field theories.
We outline the effective theories resulting from choosig the mass or flavor basis, examine the phenomenological consequences of this choice.

Based on
https://inspirehep.net/literature/2873402
https://inspirehep.net/literature/2659228
https://inspirehep.net/literature/1387760
and ongoing work

Speaker: Giorgio Torrieri

neutqft.pdf

10:00 AM Field-Theoretical Treatment of Neutrino Wave Packet Evolution with Distance

The field-theoretical S-matrix approach to neutrino oscillations assumes that the initial and final particle states are wave packets, which are superpositions of plane waves, and treats the neutrino as a purely virtual particle, propagating over macroscopic distances. Neutrino oscillations arise from the interference of the macroscopic Feynman diagrams with intermediate neutrinos of different masses. A duality is established between the modified neutrino propagator and the effective neutrino wave packet evolving with time and distance. It is shown that the classical inverse-square law can be violated on short but macroscopic baselines. Data from short-baseline (SBL) reactor antineutrino experiments and from experiments with artificial neutrino sources in radiochemical solar neutrino detectors qualitatively confirm this possibility.

Speaker: Dmitry Shkirmanov (Joint Institute for Nuclear Research)

main_shkirmanov.pdf

8:30 AM → 10:15 AM Dark Matter

Convener: Farinaldo Queiroz

8:45 AM Latest results of the PandaX-4T experiment and prospect of PandaX-xT

The PandaX-4T experiment is a dual-phase liquid xenon time projection chamber operated at the China Jinping Underground Laboratory (CJPL), featuring a total xenon mass of approximately 4 tonnes and a fiducial target of 3.7 tonnes. The detector is optimized for rare event searches, with physics goals including dark matter detection and neutrinos research.
Using data from commissioning and early science runs, PandaX-4T has achieved leading sensitivity to spin-independent WIMP–nucleon elastic scattering and the indication of solar ^{8}\mathrm{B} neutrinos via coherent elastic neutrino-nucleus scattering (CEνNS) in a liquid xenon detector, with a statistical significance at the few-sigma level. This measurement provides an important validation of detector response in the sub-keV to few-keV energy region and establishes a foundation for future precision neutrino studies.In parallel, PandaX-4T continues to deliver results on rare xenon processes, including measurements related to double-beta decay.
The collaboration is actively developing the next-generation PandaX-xT observatory. PandaX-xT is designed as a general-purpose xenon observatory capable of probing dark matter interactions with exposures at the hundreds of tonne-year scale, searching for Majorana neutrino signatures, precision CEνNS measurements, and other ultra-rare signals.

Speaker: Xiaopeng ZHOU

ICHEP2026-PandaX.pdf

9:00 AM Recent results from the LUX-ZEPLIN (LZ) dark matter experiment

LUX-ZEPLIN (LZ) is a dark matter direct detection experiment operating nearly a mile underground at the Sanford Underground Research Facility (SURF) in Lead, South Dakota, USA. LZ employs a dual-phase xenon time projection chamber with 7 tonnes of active volume and a multi-component veto system primarily to search for Weakly Interacting Massive Particles (WIMPs), a well-motivated dark matter candidate. This presentation will give the status of the LZ experiment and its searches for WIMP dark matter and other phenomena beyond the Standard Model.

Speaker: Prof. Scott Kravitz (University of Texas at Austin)

LUX-ZEPLIN Results ICHEP 2026.pdf

9:15 AM Light Dark Matter Probes and ReD's Recent Results

One of the goals of the Recoil Directionality Experiment (ReD) is to improve the measurement of the ionization yield at very low nuclear recoil energies. In this talk we will describe our investigation of neutron interactions in a dual-phase LAr Time ProjectionChamber, in the 2 - 10 keV recoil energy region. This is a crucial measurement for light WIMP searches (below 10 GeV) in LAr. We will present our preliminary results in which we determine its charge yield in this low energy region, using a 252Cf fission source. We will also discuss the next stage of our experiment, ReD+, for which we will use a 2.5 MeV neutron generator. This upgrade will allow us to improve our results down to 0.5 keV. The ReD experiment is part of DarkSide Collaboration, which aims to directly probe Dark Matter.

Speaker: Prof. Ivone Albuquerque (University of Sao Paulo & Princeton U.)

ichep26.pdf

9:30 AM ALLEVIATING THE HUBBLE TENSION USING DIMENSION-6 OPERATORS AND RELATIVISTIC DARK MATTER

Long-lived particles (LLPs) provide a key window into physics beyond the Standard Model, offering characteristic signatures at colliders and in cosmology. In many models, the decay products can disrupt the synthesis of light nuclei in the early universe and alter cosmological relics like the Cosmic Microwave Background. In the case of an LLP decaying into dark matter and photons, dark matter can mimic the effect of neutrinos, increasing the number of relativistic degrees of freedom, N_eff, and possibly alleviating the Hubble tension. In this work, dimension-6 effective field theories are considered to describe such decays. The decay widths are computed for fermionic and vector dark matter, while connecting the energy scale with effective number of relativistic species.

Speaker: Mickael Farias (Universidade Federal do Rio Grande do Norte)

ICHEP 2026 - Mickael.pdf

9:45 AM QUEST-DMC: Superfluid Helium and Molecular Targets for Low-Mass Dark Matter

Dark matter candidates below the GeV scale require detectors capable of resolving extremely small energy deposits. I will present the QUEST-DMC programme, which uses the low-energy excitations of superfluid helium-3 together with ultra-low-temperature quantum readout to search for light dark matter. I will discuss the projected sensitivity to sub-GeV dark matter, the challenges associated with signal production and detection in superfluid helium-3, and briefly outline a complementary direction based on molecular and organic-crystal targets.

Speaker: Juri Smirnov

Ichep2026talk.pdf

8:30 AM → 10:15 AM Education & Outreach

Convener: Sandra Padula (UNESP - Universidade Estadual Paulista (BR))

8:30 AM Humanizing High-Energy Physics communications: Strategic Social Media and Community Engagement in the CMS experiment

In an increasingly fragmented media landscape saturated with misinformation, high-energy physics experiments like the Compact Muon Solenoid (CMS) confront a critical imperative: engaging diverse public audiences while securing sustained support for fundamental research. To address this challenge, CMS has fundamentally reimagined its public engagement strategy, transitioning from traditional top-down broadcasting toward a human-centric, multi-platform approach: representation of diverse scientific voices, authenticity by showing real, unplanned moments of how science is actually done, and prioritization of people over institutional narratives. This strategic shift materializes through concrete operational changes: designated Communication Contact Persons embedded within subsystem groups facilitate grassroots engagement, while the core group actively cultivates genuine dialogue in place of passive information distribution. Campaigns are designed for YouTube, Instagram, TikTok, X, and BlueSky. They’re tailored on the fly and use humour, interactive features, and live streaming. By teaming up with partners, they broaden visibility and reach beyond traditional institutional public messaging. Collectively, these efforts yield a compelling finding: personal connections with active scientists meaningfully strengthen public support for research and enhance the pipeline for recruiting future generations of researchers. Through multilingual initiatives, behind-the-scenes transparency efforts, and community-driven campaigns, we demonstrate that substantive investment in professional communication infrastructure produces measurable, tangible returns.

Speaker: Sofia Hurst (CMS, CERN)

Humanising HEP

Humanising HEP_1.pdf

8:45 AM Science Education and Outreach for Capacity and Capability Building in High-Energy Physics in Africa

Persistent inequities in access to science education continue to constrain participation in high-energy physics, particularly in resource-constrained contexts. Conventional outreach approaches, often episodic and weakly connected to formal education pathways, have shown limited long-term impact on progression into advanced scientific study.

This contribution presents a complexity-informed Science Education and Outreach model developed at Mandela University, anchored in the University’s core purpose and institutional ethos of service to society, and embedded within a dedicated Engagement and Transformation portfolio at executive level. The model supports capacity and capability building across the sciences, with high-energy particle physics and astrophysics serving as flagship beneficiary domains. High-energy physics and astrophysics are used as exemplars of frontier science requiring early pipeline development, sustained mentorship, and research-connected learning environments.

Science education ecosystems are treated as complex adaptive systems shaped by interacting agents, institutions, curricula, and material constraints such as uneven resourcing and limited access to advanced training environments. Evidence is drawn from university programmes, national physics education initiatives, continental capacity-building efforts, and emerging regional collaborations. By strengthening the continuum from science education to research, this approach contributes to the long-term sustainability of the global high-energy physics talent pipeline within the ICHEP community.

Speaker: Azwinndini Muronga

ICHEP2026-E&O-Muronga.pdf

9:00 AM CELESTE: A scientific collaboration network among schools and universities

Instrumentation projects in high-energy physics provide valuable opportunities for science outreach by engaging students and teachers in hands-on experimental activities and promoting the dissemination of scientific knowledge beyond academia. While recent outreach efforts in particle physics have often focused on data-analysis workshops, experimental approaches remain scarce in Brazil.

Cosmic-ray detection offers a simple, safe, and low-cost way to introduce particle-physics concepts and experimental techniques to non-specialist audiences. The CELESTE -- Cosmic sciencE Lab Experiment for Students and TEachers project addresses this gap by establishing a network of low-cost cosmic-ray detectors installed in high schools. Students and teachers actively participate in the construction, installation, and operation of the detectors, enabling direct contact with modern instrumentation and real data collection. The interconnected network allows shared data access and collaborative measurements across schools and partner universities.

We present the main components of CELESTE: (i) a modular data-acquisition system that supports the detector network; (ii) pedagogical strategies and educational materials for teacher training; and (iii) interactive tools for data processing and visualization. The project fosters collaboration between schools and universities and promotes sustained interest in physics and STEM careers.

Speaker: Marisilvia Donadelli (Universidade do Estado do Rio de Janeiro (BR))

CELESTE_ICHEP_MDonadelli.pdf

9:15 AM "Niñas Atómicas" (Atomic Girls): An initiative that generates opportunities for young girls in STEM

I will present the design, methodology, contents and main objectives of our Niñas Atómicas initiative, a scientific workshop for high-school girls that has taken place since 2022 under the scope of SAPHIR Millenium Institute. I will show ongoing interdisciplinary research results from the 2024 and 2025 editions of the workshop, focusing on the participants’ perceived learning after completing the workshop. I will also comment on the design of an instrument we created in order to measure the workshop’s impact on the girls’ motivation towards science, transversal scientific skills, and their choice of educational track. I will comment on early findings from the application of this instrument.

Speaker: Giovanna Cottin (Pontificia Universidad Católica de Chile (CL))

ICHEP2026_ATOMICAS_GCOTTIN.pdf

9:30 AM Impact and Evaluation of the New CMS Communication Strategy: Two Years of Implementation

In 2023, the CMS communications team embarked on its first comprehensive strategic review. Through a series of collaborative sessions, core team members defined key messages, identified target audiences, and evaluated past and ongoing outreach initiatives. This process led to the development of a refined communication strategy, which included new project proposals and a framework for better mapping and engaging the wider collaboration.

Since then, the team has implemented many of these changes and piloted various projects to track their effectiveness with external audiences. This talk will detail the key conclusions of the strategic review, the results achieved so far, and the lessons learned in fostering a more cohesive and impactful communication network. We then look to the future - things still to do and possible evolutions to meet the changing communications landscape.

Speaker: Nefeli Stathaki (CERN)

ICHEP 2026 -CMS strategy evaluation.pdf

8:30 AM → 10:15 AM Strong Interactions and Hadron Physics

Conveners: Jose Pelaez, Jose R. Pelaez

8:45 AM Light Meson decays at BESIII

The world’s largest sample of J/ψ events accumulated at the BESIII detector offers a unique opportunity to investigate η and η′ physics via two body J/ψ radiative or hadronic decays. In recent years the BESIII experiment has made significant progresses in η/η′ decays. A selection of recent highlights in light meson decays at BESIII are reviewed in this report, including the precision measurement of Dalitz plots, transition form factor measurements, as well as the search for rare/forbidden decays of η/η′.

Speaker: xiaolin Kang

XiaolinKang-ICHEP2026-BESIII.pdf

9:00 AM The hadronic decays of charmed mesons at BESIII

BESIII has collected 20.3 and 7.33 $fb^-1$ of e+e- collision data samples at 3.773 and 4.128-4.226 GeV. These constitute the world's largest samples of D anti-D and Ds anti-Ds pairs, respectively, providing a unique laboratory to probe the non-perturbative dynamics of Quantum Chromodynamics (QCD) in the charm sector.
We will present the measurement of branching fractions of fifteen $D_s^+$ hadronic decays using a global fit. Furthermore, we report recent advancements in amplitude analyses of $D \to \pi \pi \eta$, $D^+ \to \pi^+ \pi^0 \pi^0/\eta \eta$, $D^0 \to K_S \pi^0 \pi^0$ as well as $D_s^+ \to K_SK_L\pi^+$, $D_s^+ \to \pi^+\pi^+\pi^-\pi^0 (\pi^0)$. These analyses allow for detailed investigations of intermediate processes involving scalar mesons and the polarization properties of D to vector-vector decays. We also observe deviations in the branching fractions of $\phi$-meson decays from the Particle Data Group (PDG) world averages, as well as anomalously large branching fractions for decays dominated by W-annihilation topologies.

Speaker: Haoran Zhang

The hardronic decays of charmed mesons at BESIII_ICHEP2026.pdf

9:15 AM Unitary $KK$ and $K\pi$ inputs for an amplitude analysis of the $D^+ \to K^-K^+\pi^+$ decay at LHCb

Charge-Parity Violation (CPV) is expected in 3-body charm decays. In particular, the process $D^+ \to K^-K^+\pi^+$ is an interesting channel to investigate, where an amplitude analysis is required to understand the dynamics of Final State Interactions (FSI) and the mechanism that can generate CPV. This presentation will show the results of analysing recent data of the Large Hadron Collider beauty (LHCb) experiment at CERN, with a precise theoretical model looking to reveal CPV mechanisms. Previous analyses of the $D^+ \to K^-K^+\pi^+$ decay were unable to satisfactorily describe the data using the Isobar Model. Currently, LHCb has a sample of charmed meson decays with around 100 million events for the $D^+ \to K^-K^+\pi^+$ decay, so a more robust phenomenological model is needed to describe such a large data set. This model has allowed the inclusion of hadronic FSI and three-body effects, overcoming some limitations of the Isobar Model, and has all factors necessary to reveal the presence of CPV. To do so, it factorizes the weak vertex separated in leading topologies and relies on extensions of Unitarized Chiral Perturbation Theory.

Speaker: Felipe Cesario Laterza Lopes (CBPF - Brazilian Center for Physics Research (BR))

ichep_unitary_KK_Kpi_inputs_DKKpi_AmAn.pdf

9:30 AM Hadronic rescattering to solve helicity puzzle in $B^+\to p\bar p \pi^+(K^+)$ decays

We explore the contribution of hadronic final state interactions (FSI) to propose a production mechanism and interpret the puzzle on helicity angle distributions in $B^+\to p\bar p \pi^+$ and $B^+\to p\bar p K^+$ decays. Experimental results indicate opposite helicity angle $\theta_p$ distributions in those two channels with the difference presenting a remarkable linear dependence on $\cos \theta_p$.
We assume the production mechanism is
driven by $B^+\to xy\, m^+ \to p\bar p m^+$, where $m =\pi$ or $K$, and $xy$ represents favorable mesonic decay channels producing $p\bar p$. We develop a model that includes three-body final state interaction between the $p\,,~\bar p$ and $\pi^+$ or $K^+$ considering the dominance of elastic channels $\pi^+p$ and $K^+\bar p$ interactions below 2\,GeV/c$^2$. Our three-body framework with FSI explains qualitatively the observed opposite behavior of the helicity distributions and the observed linearity.

Speaker: Patricia Magalhaes (UNICAMP)

ICHEP_2026_pph.pdf

9:45 AM Decays of charmed hadrons at Belle and Belle II

The Belle and Belle II experiments have collected a $1.6~\mathrm{ab}^{-1}$ sample of $e^+e^-$ collision data at center-of-mass energies near the $\Upsilon(nS)$ resonances. These samples contain a large number of $e^+e^-\to c\bar{c}$ events that produce charmed mesons and baryons. We present new results including the observation of the radiative decay $D_s(2317)^+ \to D_s^* \gamma$, a search for the electroweak penguin decay $D^+\to \pi^+ e^+e^-$, and a partial-wave analysis of the decay $\Xi_c^+\to \Xi^-\pi^+\pi^+$.

Speaker: Jake Bennett (University of Mississippi (US))

2026ICHEP_Bennett.pdf

8:30 AM → 10:15 AM Beyond the Standard Model

Convener: Andre Lessa (Universidade de Sao Paulo)

8:30 AM Searches for dark sector particles at Belle and Belle II

The Belle and Belle II experiment have collected samples of $e^+e^-$ collision data at center-of-mass energies near the $\Upsilon(nS)$ resonances. These data have constrained kinematics and low multiplicity, which allow searches for dark sector particles in the mass range from a few MeV to 10 GeV. We present new searches in a $600~\mathrm{fb}^{-1}$ sample collected by Belle II, including searches for a light dark photon decaying to a pair of muons, an axion-like particle decaying to two photons, and a $Z^{\prime}$ boson that decays invisibly. Using a $711~\mathrm{fb}^{-1}$ sample collected by Belle, we search for $B\to h + \mathrm{invisible}$ decays, where $h$ is a $\pi$, $K$, $D$, $D_{s}$ or $p$, and $B\to Ka$, where $a$ is an axion-like particle.

Speaker: Alexander Heidelbach (LMU Munich)

DS@BelleII_ICHEP_2026.pdf

8:45 AM Searches for Dark Sector Mediators at LHCb

The LHCb detector at the LHC provides unique coverage in the forward rapidity region. Its flexible trigger system enables the efficient recording of low-mass states, while the high-precision vertex detector allows for excellent separation between primary interactions and secondary decays. These capabilities make LHCb particularly powerful in exploring regions of phase space relevant to searches for both prompt and long-lived particles predicted by dark sector models. A selection of results will be presented, including searches for heavy neutral leptons and axion-like particles, alongside with the trigger approaches used for dark sector signatures.

Speaker: Andrea Merli (EPFL - Ecole Polytechnique Federale Lausanne (CH))

Merli_ICHEP_BSM_physics.pdf

9:00 AM Discrimination of axion-photon initiated process to tX final state within pPb collisions at 8.16 TeV via neural networks training and sensitivity to anomalous couplings.

Contributions from axion-like particles (ALPs) to top quark production are currently investigated at the LHC. In this work phenomenology of ALP from spontaneously broken Peccei-Quinn symmetry model that considers mass range from lower 200 GeV bound is inspected. ALP particles as photons initiate the process for tX single production. Unique patterns for tX topology from kinematic variables are identified with respect to standard tX and ttbar production via gluon initiated processes. Event selection at detector level is also implemented and discrimination is enhanced by employing a neural network training process. Sensitivity to observation and for exclusion of anomalous couplings is also estimated.

Speaker: Tulio Laux Kuhn (Universidade do Estado do Rio de Janeiro (BR))

alp-ichep.pdf

9:15 AM New physics searches in beam dump at the NA62 experiment

The NA62 experiment at CERN, designed to measure the highly-suppressed decay $K^{+} \to \pi^{+}\nu\bar{\nu}$, has the capability to collect data in a beam-dump mode, where 400~GeV protons are dumped on an absorber. In this configuration, New Physics particles may be produced in the absorber and decay in an instrumented volume beginning approximately 80 m downstream of the dump. Preliminary results from a search for Heavy-Neutral leptons decaying in flight to semi-leptonic final states are reported, based on an analysis of a sample of $6.2 \times 10^{17}$ protons on dump collected in 2021, 2023, and 2024.

Speaker: Jan Jerhot (Max Planck Society (DE))

jjerhot_260730_ICHEP.pdf

9:30 AM 1. The search of Dark photon in fixed target experiments.

Fixed target experiments are excellent tools for searching for signals of weak interacting dark matter in the sub-GeV mass region. The concept of dark portals between hidden and ordinary matter, as described by the Standard Model, typically involves light sub-GeV intermediate states. In particular, the dark photon portal will be considered and discussed within the framework of existing and future experiments, such as NA64 and NA62 at the SPS at CERN. Besides, it is instrument a test LFV process if these process is connected with radiation of new particle. In beam dump mode such experiments are also tools for studying visible modes of dark matter. We will discuss the current experimental situation, our theoretical calculation of dark photon production and discuss general model of dark photon limits in the sub-GeV mass region.

Speaker: Alexey Zhevlakov (Joint Institute for Nuclear Research (RU))

ICHEP_DP_2026.pdf

9:45 AM New physics searches with kaon and pion decays at NA62

Searches for the decays $K^{+}\rightarrow\pi^{+}X$ and $\pi^{+}\rightarrow e^{+}N$ are presented using data collected by the NA62 experiment in 2016--2022 and 2017--2024, respectively. Results are interpreted to constrain a range of new physics scenarios covering all four portal model scenarios.Upper limits on the $K^{+}\rightarrow\pi^{+}X$ branching ratio are established at the $10^{-11}$ level, providing constraints on dark photon, scalar and ALP couplings. From the search for heavy neutral lepton production in $\pi^{+}\to e^+N$ decays of beam pions, upper limits of the extended neutrino mixing matrix element $|U_{e4}|^2$ are established at the $10^{-8}$ level over the heavy neutral lepton mass range 95--126~MeV/$c^2$.

Speaker: Silvia Martellotti (INFN Laboratori Nazionali di Frascati (IT))

NA62_NPSearches.pdf

10:00 AM Probing Axions in the Pion Chimney

Axions are well-motivated particles beyond the Standard Model, and a wide range of experimental efforts are devoted to searching for them. If the axion mass lies close to the pion mass, however, existing probes lose sensitivity. This region of parameter space is known as the pion chimney. In this talk, I will describe novel ways to probe axions with masses near the pion mass. In particular, I will show how axion couplings to the Standard Model can be constrained by a detailed study of the charge-exchange process π- p→n π0, which is sensitive to pion mass splitting effects. By analyzing the velocity distribution of the outgoing neutron, we obtain sensitivity to axion parameters in a region that has remained previously unconstrained.

Speaker: Shirley Li (UC Irvine)

ICHEP_Li_pdf.pdf

8:30 AM → 10:15 AM Operation, Performance and Upgrade of Present Detectors

Convener: Ana Amelia Bergamini Machado

8:30 AM The CMS Tracker Upgrade for Phase-2: Meeting the Challenges of the HL-LHC

The High-Luminosity Large Hadron Collider (HL-LHC) will deliver an unprecedented dataset, enabling precision measurements of the Higgs sector, extended searches for new physics, and detailed studies of rare processes. Exploiting this physics potential requires a tracking detector capable of operating efficiently in an environment of extreme radiation levels, high pileup, and very high data rates. To meet these challenges, the CMS experiment is undertaking a complete replacement of its tracking system as part of the Phase-2 Upgrade.

This talk presents the goals, design, and current status of the CMS Phase-2 Tracker Upgrade, highlighting how its improved radiation tolerance, finer granularity, and extended pseudorapidity coverage directly enhance tracking efficiency, vertex resolution, and momentum measurement in high-pileup conditions. A key feature of the upgraded tracker is its ability to provide tracking information already at the first-level trigger, enabling the preservation of low trigger thresholds essential for the HL-LHC physics program.

The presentation will discuss how these detector capabilities translate into improved physics performance, summarize recent progress in prototyping and system tests, and outline the path toward installation and commissioning during Long Shutdown 3.

Speaker: Nazar Bartosik (UPO e INFN Torino (IT))

2026_07_30_bartosik_v1_lq.pdf

8:45 AM Enabling HL-LHC Tracking Performance: Sensor and Module Development for the CMS Phase-2 Tracker

The CMS Phase-2 tracker upgrade relies on a new generation of silicon sensors and modules designed to perform reliably under the extreme conditions of the HL-LHC. This talk provides an overview of the R&D, prototyping, and pre-production phases for both pixel detector modules and silicon modules of the Outer Tracker. We discuss sensor technology choices, front-end hybrid development, and innovations in powering and readout architectures. Emphasis is placed on performance validation through laboratory testing and beam campaigns, as well as the scaling up to industrialized production and the strategies adopted for quality assurance and integration into larger structures. These developments are essential to ensuring the tracking efficiency, resolution, and robustness required to fully exploit the HL-LHC physics program. The progress and lessons learned during module construction and early integration are presented, with a focus on meeting the demanding requirements for data rates, radiation hardness, material budget, and long-term reliability.

Speaker: Fengwangdong Zhang (Universite Libre de Bruxelles (BE))

sensor_module_develop_talk_feng.pdf

9:00 AM Operational Experience and Performance with the ATLAS Pixel detector at the Large Hadron Collider at CERN

The tracking performance of the ATLAS detector relies critically on its 4-layer Pixel Detector, with a sensitive area of ~1.9 m2 and 92 million pixels. Its original part, consisting in 3 layers of planar pixel sensor is continuously operating well since the start of LHC collisions in 2008, while its innermost layer, the Insertable B Layer (IBL), was installed in 2015 before the start of LHC Run2 and consists of both planar and 3D pixel sensors, with FE-I4 readout frontends at 130nm CMOS technology. As the closest detector component to the interaction point, this detector is subjected to a significant amount of radiation over its lifetime. At present, before the start of 2026 Run3, ATLAS Pixel Detector on innermost layers is operating after integrating fluence of O(10**15) 1 MeV n_eq cm-2. In this talk the key status and performance metrics of the ATLAS Pixel Detector are summarised, putting focus on performance and operating conditions at a over performing LHC, with special emphasis to radiation damage and mitigation techniques adopted, until the end of LHC Run3 in June 2026. These results provide useful indications for the optimisation of the operating conditions for the new generation of pixel trackers for HI-LHC upgrades.

Speaker: Yue Xu (Seattle Washington)

pixel_yuexu_20260730.pdf

9:30 AM Design and expected performance of the ALICE ITS3 tracker upgrade

During LHC LS3 (2026-29) ALICE will replace its innermost three tracking layers by a new detector, the Inner Tracking System 3 (ITS3). It will be based on newly developed wafer-scale monolithic active pixel sensors, which are bent into truly cylindrical layers and held in place by light carbon-foam mechanics. Unprecedented low values of material budget (0.09% per layer) and closeness to interaction point (19 mm) lead to a factor two improvement in pointing resolutions from very low $p_T$ (O(100 MeV/c), achieving, for example, 20 $\mu$m and 15 $\mu$m in the transversal and longitudinal directions, respectively, for 1 GeV/c particles. After a successful R&D phase during 2019-2023, which demonstrated the feasibility of this innovative detector and led to the Technical Design Report (https://cds.cern.ch/record/2890181), the final sensor and mechanics are being developed right now. This contribution will review the conceptual design and the main R&D achievements, as well as the current activities and road to completion and installation. It concludes with a projection of the improved physics performance, in particular for heavy-flavour mesons and baryons and thermal dielectrons, that will come into reach with this new detector installed.

Speaker: Andrea Rossi (INFN, Padova (IT))

ITS3_Rossi_v1 .pdf

9:45 AM A High-Performance MAPS-based LHCb Upstream Tracker Upgrade

The LHCb Collaboration is preparing for a Phase-II upgrade to fully exploit the potential of HL-LHC. The detector will operate during Run 5 at an instantaneous luminosity of up to 1.5x10^34 cm-2s-1. To maintain and ideally improve detector performance, all subdetectors will be replaced with new systems, either entirely or in their central regions.

The Upstream Tracker is located upstream of the dipole magnet, serving as the middle component of the three-subdetector tracking system. It plays a crucial role in reducing the ghost track rate, enhancing the software-based trigger speed, and significantly improving the reconstruction efficiency of long-lived particles.

The current detector will be fully replaced by a MAPS-based detector - the Upstream Pixel tracker (UP). Several sensor chips that use different CMOS imaging processes from different foundries are under development. The one that aligns with the upgrade timeline and meets the requirements will eventually be chosen. Meanwhile, the UP team is advancing the detector development through simulation studies, while designing and prototyping key detector components, preparing for a TDR due by the end of 2026. The presentation will outline the sensor chip requirements, introduce the chip design and tests, describe the detector component R&D activities and the production plan.

Speaker: Jianchun Wang (Chinese Academy of Sciences (CN))

ICHEP2026_LHCbUP_JCW.pdf

10:00 AM The LHCb Mighty Tracker Upgrade for the HL-LHC

The LHCb experiment is a forward spectrometer dedicated to precision studies of heavy-flavour hadron decays, probing physics beyond the Standard Model through measurements of CP violation, rare decays, and searches for new weakly coupled particles. Fully exploiting the flavour physics programme in the High-Luminosity LHC era has been identified as a key priority in the ongoing European Strategy Update for Particle Physics 2026. This motivates the collection of about 300 $\text{fb}^{-1}$ at instantaneous luminosities exceeding $10^{34} \text{ cm}^{-2} \text{ s}^{-1}$, placing stringent demands on detector performance.

To meet these challenges, the LHCb tracking system will be replaced during Long Shutdown 4 as part of Upgrade II by the Mighty Tracker, a hybrid solution combining an upgraded Scintillating Fibre (SciFi) tracker in the outer regions with a high-granularity silicon pixel detector (Mighty-Pixel) in the innermost region. The SciFi upgrade relies on microlens-enhanced SiPMs and cryogenic cooling using liquid nitrogen to improve light yield and suppress radiation-induced noise. Mighty-Pixel is based on High-Voltage Monolithic Active Pixel Sensors manufactured in commercial CMOS-technology, providing precise timing resolution in HL-LHC environment. A key challenge is the integration of the sensors into serial power chains on ultra-light modules, requiring optimisation of mechanical integration, powering, and cooling.

Speaker: Dr Dirk Wiedner (Technische Universitaet Dortmund (DE))

The LHCb Mighty Tracker Upgrade for the HL-LHC-V1-F5.pdf

The LHCb Mighty Tracker Upgrade for the HL-LHC-V1-F5.pptx

8:30 AM → 10:15 AM Quark and Lepton Flavor Physics

Conveners: Erica Polycarpo Macedo (Federal University of Rio de Janeiro (BR)), Michal Koval (Charles University (CZ))

8:30 AM A new measurement of the $K^{+} \rightarrow \pi^{+}\nu\bar{\nu}$ branching ratio at the NA62 experiment

The $K^{+}\rightarrow\pi^{+}\nu\bar{\nu}$ decay is a golden mode for flavour physics. Using data collected in 2016--2022, NA62 announced the first observation of this decay with a signal significance above $5\sigma$ and the measurement $\mathcal{B}(K^{+}\rightarrow\pi^{+}\nu\bar{\nu}) = \left( 13.0^{+ 3.3}_{- 3.0} \right)\times10^{-11} $. New results from the analysis of the 2023--2024 dataset are presented. This dataset doubles the effective sample size, leading to a $5\sigma$ expected sensitivity for the Standard Model process. Reconstruction and selection algorithms have been improved, boosting sensitivity and reducing the background contamination. An updated measurement of the branching ratio is presented and prospects for the full 2016--2026 dataset are discussed.

Speaker: Joel Swallow (CERN)

ICHEP26_NA62_Kpnn_JSwallow_vP.pdf

8:45 AM New results on rare and radiative kaon decays from the NA62 experiment

The NA62 experiment at CERN collected a large sample of in-flight $K^+$ decays during Run 1 (2016--2018) and resumed data taking in 2021, with operations foreseen through 2026. This talk presents new preliminary results from NA62 based on data collected up to 2024. These include the first observation of the decay $K^+\to\mu^+\nu\mu^+\mu^-$, precision studies of rare and radiative kaon decays such as $K^+ \to e^+ \nu \gamma$ and $K^+ \rightarrow \pi^+ \pi^+ \pi^- \gamma$, and improved measurements of their branching ratios. The excellent kinematic reconstruction, timing resolution, and trigger performance of the NA62 detector enable effective background suppression and high-precision measurements. Preliminary results improving the precision of the experimental state-of-the-art are presented.

Speaker: Zdenko Hives (Charles University (CZ))

ICHEP2026_Hives.pdf

9:15 AM Radiative phenomena in weak kaon decays

The rare radiative $K\to\pi\ell^+\ell^-$ decays ($\ell=e,\mu$) provide experimental access to the $K\to\pi\gamma^*$ transitions, and comparing the two channels allows for a stringent test of lepton-flavor universality. Although the underlying $K\to\pi\gamma^*$ conversions have been studied extensively, the radiative corrections for the $K^+\to\pi^+\ell^+\ell^-$ decays involve the $K^+\to\pi^+\gamma^*\gamma^{(*)}$ transitions (with up to two virtual photons). At the same time, the $K\to\pi\gamma^*\gamma^*$ transitions are essential for the description of the $K\to\pi e^+e^-\ell^+\ell^-$ decays, which represent a background to new-physics searches.

Unitarity corrections from $K\to3\pi$ have been proven important for the associated processes, and in the present work, these corrections to $K\to\pi\gamma^{(*)}\gamma^{(*)}$ transitions are revisited in the view of ongoing analyses of $K^+\to\pi^+\gamma\ell^+\ell^-$ decays at NA62 and extended to the doubly off-shell case. These results may also find application in other related processes, including $\eta^{(\prime)}$ decays.

Speaker: Tomáš Husek (Charles University and University of Birmingham)

Husek_ICHEP2026.pdf

9:30 AM Searches for rare strange-hadron decays and forbidden $B$ decays at LHCb

Rare decays of strange hadrons and forbidden $B$ decays offer unique sensitivity to physics Beyond the Standard Model (BSM). Processes such as $K^0\to \mu\mu$ and $K^0\to \pi\pi (\gamma^{*}\to\mu\mu)$ decays are highly suppressed in the SM with expected branching fractions below or around $10^{-12}$. These decays provide important constraints on new $C\!P$-violating effects and valuable inputs for understanding long-distance contributions, which are difficult to estimate theoretically. Forbidden $B$ decays such as lepton-number-violating $B^-\to D^{(*)+}\mu^{-}\mu^{-}$ decays probe whether neutrinos are Majorana or Dirac particles by testing the couplings of possible Majorana fermions to the second lepton generation. In this talk, we present recent searches for these and similar processes that probe BSM particles and interactions.

Speaker: Alessandro Scarabotto (Technische Universitaet Dortmund (DE))

A_Scarabotto_RareStrangeBeautyAtLHCb_ICHEP_2026_final.pdf

9:45 AM Testing CPT symmetry with multi-strange baryons mass precision measurements with ALICE

In any relativistic quantum field theory, such as quantum chromodynamics or electroweak theory, the interactions are invariant under the combined operation of charge conjugation (C), parity transformation (P) and time reversal (T). One of the consequences of this (CPT) symmetry is that particles and their corresponding antiparticles must have exactly the same mass. While the mass difference between proton and antiproton has been measured with very high precision, the extension to the (multi-)strange baryon domain still lacks precise measurements.
In this contribution, the most precise measurement of mass differences between $\Xi^{-}$ and $\overline{\Xi}^{+}$, and between $\Omega^{-}$ and $\overline{\Omega}^{+}$ using the ALICE detector will be presented, improving the precision obtained by averaging the results from previous experiments.

Speaker: Romain Schotter (Austrian Academy of Sciences (AT))

ICHEP2026_RomainSchotter_v3.pdf

10:00 AM Trident process in muon-tungsten scattering at far-forward LHC detectors

The electromagnetic production of a dilepton pair in the muon-ion scattering, usually denoted as muon trident process, is investigated considering the feasibility of studying processes induced by muons at LHC using FASER$\nu$ and FASER$\nu$2 detectors. The total and differential cross-sections are estimated taking into account of the Bethe-Heitler and bremsstrahlung channels, and predictions for the event rates expected for muon-tungsten ($\mu W$) collisions at the LHC energies are calculated. Our results indicate that the observation of the muon trident process is feasible at these detectors. In particular, our results indicate that the electromagnetic production of $\tau^{+}$ $\tau^{-}$ pairs in the $\mu W$ scattering can, in principle, be observed for the first time ever at the LHC. In addition, we made predictions for the production of QED bound states.

Speaker: Gabriel Rabelo-Soares (Universidade Estadual de Campinas)

ICHEP_muTrident.pdf

8:30 AM → 10:15 AM Heavy Ions

Convener: Liliana Apolinario (LIP (PT))

8:30 AM Recent highlights in heavy-ion and light-ion collisions with ATLAS at the LHC

The ATLAS experiment at the Large Hadron Collider has an extensive heavy-ion physics program aimed at understanding the properties of strongly interacting matter under extreme conditions. This talk presents recent highlights from heavy-ion and light-ion collisions measured with ATLAS, covering a broad range of observables sensitive to the formation and evolution of the quark–gluon plasma.

Results are presented on global event properties, azimuthal anisotropy and collective flow, jet–medium interactions, and event-by-event fluctuations in Pb+Pb and Xe+Xe collisions. Measurements of flow harmonics and transverse-momentum fluctuations provide constraints on the initial-state geometry, transport properties, and effective equation of state of the medium. Studies of jet–hadron and photon–jet correlations are discussed as probes of parton energy loss and medium response.

The overview is complemented by new results from light-ion collisions, including oxygen–oxygen (O+O) and neon–neon (Ne+Ne) systems at √sNN = 5.36 TeV. These measurements explore the onset of collective behavior in small systems and enable systematic comparisons across collision systems of different sizes. Together, these results provide a coherent picture of QCD matter from small to large systems and offer stringent tests of theoretical models describing the dynamics of relativistic heavy-ion collisions.

Speaker: Dr Nicolas Viaux Maira (Federico Santa Maria Technical University (CL))

Heavy_Ions_Highlights_ATLAS_ICHEP2026_vF.pdf

8:45 AM Thermal photon production in massless boost-invariant gases

Photons emitted in ultrarelativistic heavy-ion collisions provide penetrating probes of the early-time quark–gluon plasma (QGP), as they interact only weakly with the medium and escape with minimal final-state rescattering. While most measured photons originate from hadronic decays, the direct-photon spectrum cannot be accounted for by prompt production alone and requires a sizable thermal component [1]. In phenomenological applications, thermal photon emission from the QGP is commonly evaluated assuming near-equilibrium dynamics or viscous corrections based on the 14-moment approximation [2]. However, recent kinetic-theory studies demonstrate that, although the energy–momentum tensor is accurately reproduced by fluid dynamics, the underlying single-particle distribution can remain far from equilibrium due to nonhydrodynamic contributions not constrained by conserved currents [3]. In this work, we quantify how such nonhydrodynamic contributions modify thermal photon production in the QGP within the Forward Scattering Approximation. By comparing photon emission rates obtained from the full kinetic distribution with those computed using 14-moment viscous corrections, we assess the bias induced by standard hydrodynamic truncations and identify the kinematic regimes where early-time photon observables become sensitive to far-from-equilibrium dynamics.

[1] J.-F. Paquet et al., PRC 93, 044906 (2016).
[2] C. Shen et al., PRC 91, 014908 (2015).
[3] C. Brito, et al., arXiv:2411:06267.

Speaker: Caio Brito (University of Jyväskylä)

deBrito-ICHEP26.pdf

9:00 AM Bayesian Inference for Heavy-Ion Collisions: Opportunities and Challenges

Over the past decade, Bayesian inference has become an invaluable tool in heavy-ion collision modeling. By integrating input from both experimental and theoretical perspectives, it bridges two traditionally separate domains. Progress in this framework relies on both high-precision experimental measurements and theoretical developments that yield more accurate predictions. This dual requirement positions Bayesian analyses as a collaborative frontier, offering opportunities for both experimentalists and theorists.
The recent availability of high-precision measurements paves the way for broader and more thorough studies. Historically, Bayesian inference has primarily been used to investigate the transport properties of the quark-gluon plasma (QGP) produced in heavy-ion collisions, successfully constraining the temperature dependence of specific shear and bulk viscosities. More recent studies have extended the method to explore initial-stage dynamics, nuclear structure, and jet quenching.
In this talk, I will discuss the current and future roles of Bayesian inference, highlighting its advantages and limitations. Finally, I will outline how we can further develop and refine the framework to achieve a more consistent and comprehensive understanding of QGP matter.

Speaker: Dong Jo Kim (University of Jyvaskyla (FI))

BayesianInference_HIC_ICHEP2026_djkim.pdf

9:15 AM Universal Transverse Spectrum Shapes and the Onset of Collective Behavior

This presentation will reveal a remarkable universality in the transverse momentum spectra observed experimentally in ultrarelativistic heavy-ion collisions. Even though the QCD effects in these collisions are very complicated, the scaling behavior suggests a deeper, as of yet unknown, mechanism. By scaling out the global effects of total particle number and mean transverse momentum, we reveal that this universal behavior holds across a range of nuclear collision systems, with exceptions in large transverse momentum and in small systems like p-p collisions. These observations align with hydrodynamic predictions, hinting at a possible hydrodynamic regime onset. The findings offer a new avenue for further investigations, both theoretical and experimental, into this new scaling phenomenon, promising insights into the collective and non-collective dynamics encoded in the transverse particle spectra across varying collision systems. I’ll also show recent results using the scale spectra in Bayesian analysis in order to constraint the physics of the qgp.
based on 2406.15208.

Speaker: Fernando Gardim (Federal University of Alfenas)

ICHEP_Universal.pdf

9:30 AM Recent measurements of flow and correlations from the CMS experiment at the LHC

The study of collective phenomena in high-energy hadronic collisions provides crucial insights into the properties of strongly interacting matter under extreme conditions. This talk presents a selection of recent results from the CMS experiment at the CERN LHC, covering anisotropic flow and multi-particle correlations across a wide range of collision systems.

Speaker: Cesar Bernardes (UNESP - Universidade Estadual Paulista (BR))

slides_ICHEP2026-Natal-Brazil_CesarABernardes-v2.pdf

9:45 AM Underlying-event properties in pp collisions at $\sqrt{s}$ = 13.6 TeV measured with the ALICE detector at the LHC

To characterize the global features of proton-proton (pp) collisions, charged-particle production is analyzed in topological regions defined relative to the particle with the highest transverse momentum $(p^{\mathrm{leading}}_{\mathrm{T}})$. The production in regions orthogonal to (transverse) and along (toward and away) the $p^{\mathrm{leading}}_{\mathrm{T}}$ direction encodes information about the underlying event (UE) and hard-scattering fragmentation products, respectively. Characterizing the UE is essential for tuning Monte Carlo generators and understanding QGP-like signatures in small systems via multi-parton interactions.

This talk reports UE measurements at midrapidity in pp collisions at $\sqrt{s}=13.6$ TeV. Charged-particle number and summed transverse-momentum densities are measured as a function of $p^{\mathrm{leading}}_{\mathrm{T}}$ across the three regions. In the transverse region, particle densities increase steeply at low $p^{\mathrm{leading}}_{\mathrm{T}}$ before reaching a plateau. These results are compared with measurements at lower center-of-mass energies to illustrate the energy dependence of UE activity and are contrasted with predictions from PYTHIA 8 and EPOS 4.

Speaker: Jesus Eduardo Munoz Mendez (Universidad Nacional Autonoma (MX))

ICHEP_UE.pdf

8:30 AM → 10:15 AM Astroparticle Physics and Cosmology

Convener: Rita Anjos

8:45 AM Analysis of the $\alpha$-Starobinsky Inflationary Model

In this work, we study numerically the alpha-Starobinsky Inflationary Model in order to calculate the scalar and tensor power spectra. We perform our calculations for different parameters of the potential and show the contour plots.

Speaker: Dr Clara Rojas (Yachay TECH University)

main.pdf

9:00 AM Towards gravitational two-body dynamics at 6th post-Newtonian order

The gravitational two-body problem attracted revived interest since the direct detection of gravitational waves from coalescing binaries almost ten years ago.
I'll give an overview of the current development of the perturbative expansion of the two body dynamics, focusing on the contribution of radiatve modes to 6th post-Newtonian order.

Speaker: Mr Riccardo Sturani (IFT-UNESP/ICTP-SAIFR)

sturani_ICHEP_30_Jul_2026.pdf

9:15 AM Phantom crossing in interacting dark energy models

Recent data seems to indicate that dark energy may not be consistent with a simple cosmological constant. Instead, the combined datasets
show evidence for a dynamical dark energy, with a varying equation of state that crosses the so-called “phantom divide” (w < −1) at low redshifts.
This behavior can not be reproduced with simple quintessence models without evoking exotic kinetic terms or non-minimal coupling.
In this talk we show how the introduction of an interaction between dark energy and dark matter, which arises from well-motivated models, can produce an effective phantom crossing.

Speaker: Prof. Rogerio Rosenfeld (IFT- UNESP/ICTP-SAIFR)

RosenfeldICHEP_Phantom.pdf

9:30 AM Cosmic-Collider Particle Production from Runaway Bubble Collisions and Its Gravitational-Wave Imprints

We investigate particle production during cosmological first-order phase transitions in the runaway regime, where ultra-relativistic bubble walls store a significant fraction of the released vacuum energy. Upon collision, energy concentrated in the walls can be converted into highly energetic quanta on microscopic length scales set by the Lorentz-contracted wall thickness, realizing a cosmic-scale collider phenomenon. We implement the bubble-collision production formalism and connect the resulting non-thermal, spatially inhomogeneous particle population to the stochastic gravitational-wave (GW) signal. In particular, we emphasize how the production efficiency and characteristic momentum scales depend on standard phase-transition parameters such as $\alpha$ and $\beta/H_{\star}$, as well as on portal couplings to the order-parameter field. We then map the region where collision-induced particle production can be significant while remaining compatible with a detectable GW background from bubble dynamics, and we discuss representative applications to heavy neutral fermions and dark-sector states. This provides a unified way to relate microphysical model building for early-Universe phase transitions to correlated GW signatures and complementary dark-sector or neutrino-motivated phenomenology.

Speaker: Martin Arteaga Tupia

ICHEP2026.key

ICHEP2026.pdf

9:45 AM Impact of a low-mass $Z^{\prime}$ gauge boson on the astrophysical neutrino flux

Extensions of the Standard Model based on an additional $U(1)_{L\mu - L_\tau}$ gauge symmetry predict the existence of a new massive and neutral gauge boson, $Z'$, coupled to leptons of the second and third generations. Such a boson can modify the power-law behavior of the astrophysical neutrino flux through interactions with the cosmic neutrino background. In Ref. [1], we investigate the impact of this model on astrophysical neutrino events at the IceCube Observatory. We derive the sensitivity of IceCube to the $L_\mu - L_\tau$ model using High-Energy Starting Events data corresponding to 12 years of observation, considering different assumptions for the redshift distribution of astrophysical neutrino sources, the neutrino mass ordering, and the sum of neutrino masses. Our results show that current IceCube data can probe small couplings and $Z'$ masses of the order of a few MeV, with an extended coverage when the neutrino source distribution follows the star formation rate model. In addition, we demonstrate that IceCube-Gen2 will probe a significantly larger region of the parameter space, allowing for improved tests of the $L_\mu - L_\tau$ model.

Speaker: Reinaldo Francener (Universidade Estadual de Campinas)

ZprimeIceCube_ICHEP.pdf

8:30 AM → 10:15 AM Detectors for Future Facilities, R&D and Novel Techniques (including Quantum Sensors)

Conveners: Antonio Pellegrino (NIKHEF (NL), University of Groningen (NL)), Antonio Vilela Pereira (CBPF - Brazilian Center for Research in Physics (BR))

8:30 AM Progress of the Super Tau Charm Facility project in China

The Super Tau-Charm Facility (STCF) is a new-generation high-luminosity electron-positron collider proposed in China. It will operate in an energy range of 2-7 GeV with a luminosity higher than 0.5*10^35 cm^2 s^-1 at 4 GeV. The STCF can produce a large number of hadrons and tau leptons in a clean environment, serving as a unique and powerful tool for studying how quarks form hadrons to understand the quark confinement, as well as revealing the mystery of the space-time symmetry of fundamental interactions with unprecedented precision. The STCF physics program covers a broad spectrum of physics topics, placing stringent demands on the performance of the STCF accelerator and detector. The STCF detector and accelerator conceptual designs have been completed and published. A full accelerator and detector technology R&D program was established and has been progressing rapidly. In this report, the STCF physics program will be introduced following an overview of the STCF project. The STCF detector conceptual designs and R&D progress will then be presented.

Speaker: Jianbei Liu (University of Science and Technology of China (CN))

STCF-ICHEP2026.pdf

8:45 AM The IDEA detector concept for FCC-ee

The future circular electron-positron collider (FCC-ee) has been outlined as the recommended priority for the next collider at CERN by the EU strategy update process. We present IDEA, a detector concept optimized for FCC-ee and composed of a vertex detector based on DMAPS (Depleted Monolithic Active Pixel Sensors), a very light drift chamber, a silicon wrapper, a crystal electromagnetic calorimeter readout in dual readout mode, a thin 3 Tesla HTS (High Temperature Superconductor) solenoid, a dual readout hadronic fibre calorimeter and muon chambers placed within the magnet yoke. In particular we discuss the physics requirements and the technical solutions chosen to address them. The IDEA detector is a concept under development and we present some possible upgrades that are being studied in order to further extend and improve the physics capabilities of IDEA. We then describe the detector R&D currently in progress and show the expected performance on some key physics benchmarks.

Speaker: Paolo Giacomelli (Universita e INFN, Bologna (IT))

IDEA detector for FCC-ee-ICHEP2026.key

IDEA detector for FCC-ee-ICHEP2026.pdf

IDEA detector for FCC-ee-ICHEP2026.pdf

IDEA detector for FCC-ee-ICHEP2026.pptx

9:00 AM The CLD detector concept at the FCC-ee

CLD is a detector concept envisaged for the future e+e- circular collider (FCC-ee). It comprises a silicon pixel vertex detector, a silicon tracker, and highly granular calorimeters (a silicon-tungsten ECAL and a scintillator-steel HCAL), a superconducting solenoid, and an RPC-based muon system. The subsystem designs and key performance aspects of the concept will be briefly overviewed. The recent progress on simulation studies and technical R&Ds will be presented.

Speaker: David d'Enterria (CERN)

ICHEP_CLD.pdf

9:15 AM A detector for top energy DIS

The Large Hadron electron Collider (LHeC) is the proposal to deliver electron-proton/nucleus collisions at CERN using the LHC beams and a 50 GeV electron beam from an Energy Recovery Linac. While initially foreseen [1] for concurrent electron-hadron and hadron-hadron operation, a standalone electron-hadron operation phase has been proposed [2] in view of the current LHC schedule. Thus, the LHeC becomes a bridge from the HL-LHC to the next flagship at CERN, and one of the possible projects in the 2026 Update of the European Strategy for Particle Physics [3], were the FCC-ee as plan A not feasible.
In this talk we review the status of the design of a detector for the LHeC, and its extension to the FCC-eh. We present the present technology choices with their expected performance. We also analyse the possible synergies with future projects like ePIC, ALICE3 and detectors for $e^+e^-$ colliders. Finally, we review the feasibility and cost of such a detector.
[1] P. Agostini et al. (LHeC/FCC-he Study Group), J. Phys. G 48, 110501 (2021), arXiv:2007.14491 [hep-ex].
[2] F. Ahmadova et al., e-Print: 2503.17727 [hep-ex].
[3] The European Strategy for Particle Physics: 2026 Update - Recommendations by the European Strategy Group, https://cds.cern.ch/record/2950671/files/CERN-ESU-2025-002.pdf?version=1.

Speaker: Laurent Forthomme (AGH University of Krakow (PL))

lhec_detector_forthomme_ichep.pdf

9:30 AM The detector system of the SHiP/NA67 experiment at CERN

The SHiP/NA67 experiment aims to search for feebly interacting GeV-scale new particles and to perform all-flavor neutrino-physics measurements at the HI-ECN3 beam facility at the CERN SPS. The collaboration is currently optimising the experiment's initial configuration for the commissioning and first physics runs of 2032-2033.
The detector subsystems comprise a few large-area instruments: for new-particle searches, highly sophisticated veto detectors, high timing-resolution detectors, a lightweight straw tracker system, and high-spatial-precision calorimeters; and, for neutrino reconstruction, small transverse-size, high-granularity calorimeters.

Speaker: Matei Climescu (Ghent University (BE))

SHiP_Detectors_ICHEP.pdf

9:45 AM MUSIC: a detector concept for 10 TeV µ⁺µ⁻ collisions

The full exploitation of the physics potential of a multi-TeV muon collider critically depends on the detector’s ability to cope with unprecedented levels of machine-induced backgrounds. This contribution introduces the MUSIC (MUon System for Interesting Collisions) detector concept and presents its expected performance in the context of √s = 10 TeV muon–antimuon collisions. MUSIC is specifically designed to mitigate the impact of machine-induced backgrounds while preserving high efficiency and precision in the reconstruction of physics events.

The detector features an advanced all-silicon tracking system, a semi-homogeneous lead–fluorite crystal electromagnetic calorimeter, an iron–scintillator sampling hadronic calorimeter, and a superconducting solenoid providing a 5 T magnetic field. Detailed detector simulations including the dominant machine-induced background sources are presented. The results demonstrate robust tracking performance, excellent photon, electron, and jet reconstruction capabilities, and strong jet flavor identification, highlighting the strong potential of the MUSIC detector for physics studies at a high-energy muon collider.

Speaker: Luca Castelli

music_ichep_v2.pdf

8:30 AM → 10:15 AM Artificial Intelligence, Machine Learning and Quantum Computing in HEP

Convener: Vinicius Massami Mikuni

8:30 AM Colibri and a first Bayesian application to PDF determination

We present Colibri, an open-source Python framework for parton distribution function (PDF) determination, designed to provide a flexible and efficient environment for both frequentist and Bayesian inference. Colibri allows users to implement custom PDF models while leveraging built-in tools for fast observable computation, access to experimental data, and uncertainty propagation via Hessian, Monte Carlo replica, and numerical Bayesian sampling methods. As a first realistic application, we introduce a Bayesian PDF determination based on linear models, where PDFs are represented in a low-dimensional functional basis obtained from the dimensional reduction of a neural-network space. This compact representation enables fast inference, transparent control of model complexity, and principled Bayesian model selection. The methodology is validated through closure tests on Deep Inelastic Scattering data, illustrating Colibri’s capability to benchmark different uncertainty estimation strategies and paving the way for scalable Bayesian PDF fits relevant for LHC phenomenology.

Speaker: Ms Valentina Schütze (University of Cambridge)

ICHEP2026.pdf

8:45 AM Probabilistic modeling and Bayesian inference for collider data

Collider experiments produce vast, high-dimensional datasets where rare signals are buried beneath large and complex backgrounds. To extract reliable conclusions from all available data, it is essential to leverage prior knowledge across domains and to cleverly model the connection between latent variables and observables. In this talk, I will present a set of tools and techniques to build probabilistic models, and show how Bayesian inference can be used to learn latent parameter distributions in an unsupervised way. A fully probabilistic description of data allows for a number of advantages such as well-calibrated soft-assignment probabilities for classification tasks, robust uncertainty quantification, and generative sampling for model validation. Using concrete examples from collider physics, I will illustrate how this approach provides a flexible framework that interfaces modern statistical techniques with fundamental physics problems.

Speaker: Santiago Andres Tanco

main.pdf

9:00 AM Efficient Machine Learning Inference for High-luminosity LHC Applications

Machine Learning has become a key component of high-energy physics, particularly for real-time data processing in trigger systems and in view of the forthcoming HL-LHC upgrade. Such environments impose stringent constraints, requiring event processing under tight latency and memory requirements, thereby motivating the development of highly efficient inference solutions.

The ML4EP team at CERN is actively developing solutions to address these challenges. We present our recent work for efficient deployment of machine-learning models in triggers. We report aie4ml, a tool for porting models to next-generation AMD-FPGAs, and PQuantML, a library for hardware-aware model pruning and quantization.

For inference on CPUs/GPUs, we introduce SOFIE, a tool which translates trained models into optimized C++ code for heterogeneous architectures under performance constraints. By leveraging alpaka, SOFIE enables heterogeneous inference while eliminating host–device data-transfers. SOFIE integrates with PQuantML supporting inference on quantized models. It can also be used in offline workflows, like event reconstruction and data analysis. We demonstrate the integration of SOFIE into RooFit as a neural surrogate for likelihood evaluation, with automatic differentiation provided via CLAD, a source-to-source AD tool for C++.

For the various developments, we present example use cases, performance benchmarks, and discuss implications for future deployment and scalability.

Speaker: Anna Polova (UNESP - Universidade Estadual Paulista (BR))

Efficient Machine Learning Inference for High-luminosity LHC Applications (5).pdf

9:15 AM Machine Can Automatically Discover Parametric Functions to Model HEP Data

In HEP data analyses, finding an adequate function to model binned data has largely relied on a manual process: guess a functional form by intuition, fit, examine, then repeat until successful. We show that this iterative process can be automated by a machine using symbolic regression, which performs a data-driven search over function space without requiring prior knowledge of what an adequate function should look like. We present the SymbolFit package, which pairs symbolic regression with uncertainty modeling to target HEP analysis use cases, and demonstrate it on the CMS and ATLAS Run 2 dijet spectra: 560 independent seeded runs across seven simple fit configurations generated over 1000 functions fitting the spectra with $\chi^2/\text{NDF}\approx 1$, and 111 of the runs rediscovered the very dijet and UA2 functions used in published dijet searches.

Speaker: Ho-Fung Tsoi (University of Pennsylvania)

ichep_hftsoi_symbolfit.pdf

9:30 AM Deep Sets and Event-Level Maximum-Likelihood Estimation for Fast Pile-Up Jet Rejection

Multiple proton-proton interactions occur in the same bunch crossing at the LHC (“pile-up”), with the mean number of interactions per bunch crossing reaching up to about 60 in Run 3 and up to about 200 at the High-Luminosity LHC. As a direct consequence, hadronic activity within each bunch crossing increases, making it more difficult to identify collisions of interest pertaining to multi-jet final states. This talk introduces DIPz, an uncertainty-aware Deep Sets–based machine-learning model that estimates each jet’s origin along the beam axis as a Gaussian likelihood using the set of charged-particle tracks matched to the jet. Next, the DIPz per-jet predictions inside an event are combined into a likelihood-based event-level discriminant, which is cut-optimised to select events compatible with having a collision producing a given jet multiplicity of interest. This combined approach provides robust pile-up rejection for multi-jet final states with negligible additional CPU cost, making it suitable for real-time event selection in the ATLAS High-Level Trigger (HLT). Deployed online and used in Run-3 data taking, it provides an early, flavour-agnostic pile-up jet rejection layer at the HLT preselection stage, offering a previously unavailable handle for high-multiplicity jet signatures targeted by the ATLAS experiment.

Speaker: Mohammed Aboelela (Dallas SMU)

20260730_ICHEP2026Talk.pdf

9:45 AM Quantum Computing for Parton Shower and Hadronization

Spin correlations provide a powerful probe of the Standard Model (SM), physics beyond the SM (BSM), and the quantum nature of high-energy interactions. While such effects have been extensively studied for heavy particles, accessing spin correlations of light partons that hadronize into jets remains a longstanding challenge. In this work, we study parton spin correlations in hadronic Higgs decays, focusing on the channel (H \to gg). We investigate two spin-sensitive observables: a Lund-plane--based jet variable and the four-point energy--energy correlator (E4C) constructed from particles inside jets. This represents the first application of E4C to probe parton spin correlations in Higgs decays and BSM scenarios. Our analysis is performed in the clean environment of (ZH \to \nu\bar{\nu}H) production at future lepton colliders, where jet reclustering effects are minimized. In parallel, we develop a quantum-computing framework for simulating non-Abelian gauge dynamics relevant to parton evolution, introducing a block-encoding method for discrete subgroups of (SU(2)) and (SU(3)). Resource estimates and hardware benchmarks demonstrate both the feasibility and current limitations of this approach. Together, these results advance the study of quantum correlations in QCD and their potential as probes of new physics.

Speaker: Prof. Ying-Ying Li (Institute of High Energy Physics, CAS)

slides-YLW.pdf

10:15 AM → 10:45 AM Coffee break

10:45 AM → 12:30 PM Neutrino Physics

Conveners: J. Pedro Ochoa (Berkeley Lab), Liudmila Kolupaeva (Joint Institute for Nuclear Research (RU))

10:45 AM Latest results from CUORE and prospects for CUPID

The search for neutrinoless double beta decay (0νββ) is fundamental for investigating lepton-number violation, probing new physics beyond the Standard-Model, and determining whether neutrinos are Majorana particles. CUORE, a cryogenic bolometric experiment at LNGS, studies 0νββ in 130Te using 988 TeO2 crystals. It is a milestone of cryogenic detector arrays with tonne-scale detectors operated for more than 7 years below 15mK. Since 2017, CUORE has accumulated ~3 tonne-years of exposure, achieving one of the leading 0νββ limits and one of the most precise 2νββ half-life measurements thanks to a detailed background reconstruction across a broad energy range. Building on CUORE’s success, CUPID (CUORE Upgrade with Particle ID) aims to significantly enhance its 0νββ discovery sensitivity to 10^27 yr in 100Mo, covering the Inverted Hierarchy of neutrino masses. It will employ 1596 lithium-molybdate (Li2MoO4) crystals enriched in 100Mo, alongside 1710 light-detectors with Neganov-Trofimov-Luke amplification, enabling simultaneous heat and light readout for enhanced background rejection, particularly against alpha contamination and 2νββ pileup. CUPID will reuse CUORE’s cryostat and infrastructure. Current efforts focus on detector performance validation, sensitivity studies, and finalizing the experimental design to maximize physics reach. This work presents the latest CUORE results and outlines the key milestones toward CUPID’s realization.

Speaker: Dr Pedro Vinicius Guillaumon (Max Planck Society (DE))

ICHEP2026_Guillaumon.pdf

11:00 AM LEGEND-1000: A Discovery Machine for Neutrinoless Double Beta Decay

The LEGEND experiment is a next-generation search for neutrinoless double-beta decay of Ge-76 with unprecedented sensitivity. Building on the successful technologies and results of GERDA and MAJORANA experiments, LEGEND will probe the inverted neutrino mass ordering.
LEGEND-1000 represents the ultimate phase of the program, targeting an active mass of approximately one tonne of enriched germanium detectors and a discovery sensitivity beyond 10^28 years. It requires an ultra-low background index below 10^-5 counts/(keV·kg·yr) in the ROI. Deployed in the LNSG, Italy, the experiment combines HPGe detectors with excellent energy resolution immersed in liquid argon with scintillation-based active background suppression.
Key innovations for LEGEND-1000 include large-scale production of enriched germanium detectors, the use of underground argon, enhanced background reduction via material screening and clean fabrication, improved pulse-shape discrimination and LAr instrumentation. In this contribution, we present the scientific motivation, experimental design, and current status of LEGEND-1000.
This work is supported by the U.S. DOE and the NSF, the LANL, ORNL, LBNL LDRD programs; the European ERC and Horizon programs; the German DFG, BMBF, MPG; the Italian INFN; the Polish NCN, MNiSW; the Czech MEYS; the Slovak RDA; the Swiss SNF; the UK STFC; the Canadian NSERC, CFI; the LNGS and SURF facilities.

Speaker: Nadezda Rumyantseva (JINR/TUM)

Rumyantseva_ICHEP_2026_LEGEND1000.pdf

11:15 AM Experimental search for rare decays of $^{96}$Zr

$^{96}$Zr is a very promising 0νββ nuclide due to its high Q$_{ββ}$ = 3.35 MeV which is greater than the decay energies of most contributing background sources, and the large phase-space factor which is proportional to Q$_{ββ}^5$. We obtained unique zirconium samples enriched for the first time using the gas centrifuge method. Samples are enriched in $^{96}$Zr isotope to 88.18% (natural abundance 2.8%) with the isotope mass of 179.2 g. The aim of this study is to investigate level of radionuclide impurities, double beta decay of $^{96}$Zr to $0^+_1$ (1148 keV) excited state of the daughter nucleus $^{96}$Mo and single beta decay of $^{96}$Zr. The samples are being measured with the underground SNEG spectrometer at the Baksan Neutrino Observatory, which consists of a 0.9 kg HPGe detector surrounded by multilayer passive shielding. The accumulated dataset (1610 hours of background measurements and 12614 hours with the samples) provides sufficient sensitivity to observe evidence of the rarest single beta decay of $^{96}$Zr. The best constraints on double beta decay to the excited state $0^+_1$ (1148 keV) of $^{96}$Mo have been established.

Speaker: Temirlan Khussainov (JINR & INP of the Republic of Kazakhstan)

Khussainov_ICHEP_finale.pdf

Khussainov_ICHEP_finale.pdf

Khussainov_ICHEP_finale.pptx

11:30 AM New results of LEGEND physics data in the quest for 0νββ decay

The Large Enriched Germanium Experiment for Neutrinoless $\beta\beta$ Decay (LEGEND) is dedicated to the search for the $0\nu\beta\beta$ decay of $^{76}\mathrm{Ge}$ with isotopically enriched high-purity germanium (HPGe) detectors and a discovery sensitivity beyond a half-life of $10^{28}$ years. The project's first phase, LEGEND-200, has stably accumulated physics data at the Laboratori Nazionali del Gran Sasso (LNGS) for more than one year with 140 kg of HPGe detectors. The collaboration has scrutinized this initial dataset to assess the experiment's sensitivity and to study the composition of residual backgrounds. This presentation will present the experiment's performance regarding background rejection and signal acceptance, including an updated $0\nu\beta\beta$ constraint based on the latest LEGEND data and past experiments. The talk will highlight the latest performance analysis within a novel end-to-end analysis using the Julia programming language and its integration with the Julia HEP community.
This work is supported by the U.S. DOE, and the NSF, the LANL, ORNL and LBNL LDRD programs; the European ERC and Horizon programs; the German DFG, BMBF, and MPG; the Italian INFN; the Polish NCN and MNiSW; the Czech MEYS; the Slovak RDA; the Swiss SNF; the UK STFC; the Canadian NSERC and CFI; the LNGS and SURF facilities.

Speaker: Florian Henkes (Tecnical University of Munich)

2026-07-30_Henkes_ICHEP2026-Natal

2026-07-30_Henkes_ICHEP2026-Natal.pdf

2026-07-30_Henkes_ICHEP2026-Natal.pptx

12:00 PM The NEXT experiment: Results from the NEXT-100 detector

The NEXT collaboration is focused on the development of high-pressure gaseous xenon time projection chambers to investigate the Majorana nature of the neutrino via the search for neutrinoless double beta decay ($0\nu\beta\beta$). The previous NEXT-WHITE detector demonstrated the technology's excellent capabilities with respect to energy resolution (sub-$1\%$), topological discrimination, and a good understanding of background; allowing for novel methods to search for the challenging $0\nu\beta\beta$ signal.

The latest detector within the NEXT programme is NEXT-100; operating at the Laboratorio Subterráneo de Canfranc. NEXT-100 is designed to run with $\sim$100kg of enriched Xe-136 at 15 bar for 3 years to achieve a competitive $0\nu\beta\beta$ decay half-life sensitivity . The detector has completed commissioning, calibration and low background runs at $\sim$4 bar with further data taking planned to begin shortly at $\sim$10 bar. Initial results have shown very promising prospects for the scalability of NEXT technology for future tonne-scale detectors.

In this talk I will discuss the recent results from the NEXT-100 detector, its current status, and ongoing research.

Speaker: John Waiton (University of Manchester)

ICHEP2026_NEXT100.pdf

The NEXT experiment: Results from the NEXT-100 detector

10:45 AM → 12:30 PM Dark Matter

Convener: Juri Smirnov

10:45 AM Novel Searches for Light Dark Matter

For several decades, the community has intensely pursued the Weakly Interacting Massive Particle (WIMP) paradigm through accelerator searches, as well as direct and indirect detection experiments. Despite the impressive progress in sensitivity, all of these efforts have so far yielded null results. This situation has motivated the exploration of alternative dark‑matter candidates and innovative detection mechanisms, capable of probing qualitatively new regions of parameter space.In this talk, we will introduce new detection strategies for light dark matter based on two very distinct methods: one using lasers together with low‑energy accelerators focused on the dark‑photon model, and another based on nanomagnet systems designed to probe the QCD axion and dark‑photon models.

Speaker: Farinaldo Queiroz

Copy of MPIK 2025 talk_20260730_102927_0000.pdf

Farinaldo.pdf

11:00 AM DELight: The Direct Search Experiment for Light Dark Matter

There is vast unexplored parameter space for dark matter masses below a few GeV, and the field of direct dark matter detection is constantly expanding to new frontiers. In particular, low mass dark matter candidates necessitate novel detector designs with lower thresholds and alternative target materials compared to e.g. the xenon-based experiments currently providing the strongest overall constraints on many dark matter models.

The Direct search Experiment for Light dark matter (DELight) will deploy a target of superfluid 4He instrumented with large area microcalorimeters (LAMCALs) based on magnetic microcalorimeter (MMC) technology in a setup optimized for low mass dark matter searches. In this talk an overview of this novel upcoming experiment will be presented, including preliminary background models and sensitivity projections.

Speaker: Eleanor Katherine Fascione (Heidelberg University)

ICHEP_2026_Fascione.pdf

11:15 AM The TESSERACT light dark matter experiment

The TESSERACT project, a novel type of low-mass DM experiment, breaking new ground in the hunt for sub-GeV dark matter. We're deploying multiple complementary and ultra-sensitive phonon detectors, each uniquely tailored to detect nuclear-, electron-, and dark photon-type dark matter interactions. By using diverse targets like liquid helium (HeRALD) and the polar crystals GaAs and Sapphire (SPICE), and ensuring identical readout and experimental settings across all detectors, TESSERACT achieves both unparalleled sensitivity and a the capability to identify and discriminate against novel backgrounds. While full operations will begin at the Modane underground laboratory in 2029, we've already performed first dark matter searches on the surface, achieving leading low-mass sensitivities. We will present the current status of the experiments and sensors, discuss new insights into the "low energy excess background," and highlight the first sensitivities obtained from our surface background runs.

Speaker: Björn Penning

Tesseract_ICHEPP_Penning.pdf

11:30 AM Direct Dark Matter search with the CRESST-III experiment

The CRESST (Cryogenic Rare Event Search with Superconducting Thermometers) experiment, located in Laboratori Nazionali del Gran Sasso - INFN in Italy, aims to directly detect light dark matter (DM) particles. Scintillating CaWO$_4$ crystals, equipped with Transition Edge Sensor (TES), are operated as cryogenic detectors at mK temperatures, as target material for DM-nucleus scattering. CRESST achieved outstandingly low nuclear recoil thresholds $\mathcal{O}$(10-30 eV), yielding world-leading sensitivity for light dark matter particles for mass below 1.7 GeV/$c^2$. In 2019, CRESST observed for the first time an excess of events rising exponentially below 200 eV, known as the Low Energy Excess (LEE), that is currently limiting the sensitivity of many experiments in the field and whose origin remains unclear. To better scrutinise LEE and produce improved DM results, CRESST developed the DoubleTES approach that, using the coincidence readout of two TESs on the same detector, allows suppression of events generated near the sensor. The most recent updates on the identification and rejection of LEE are reported, together with the most recent results on DM.

Speaker: Dr Samir Banik (Technische Universität Wien, Atominstitut)

cresst.pdf

11:45 AM BULLKID: searching for rare events with monolithic arrays of detectors

BULLKID is a novel detector based on an array of particle absorbers sensed by multiplexed Kinetic Inductance Detectors (KIDs). The aim of this detector is to control the background by creating a fully active structure and by applying fiducialization techniques.

Following the encouraging results from a 20~g prototype detector, here we present the first operation of 3-wafer demonstrator array (60~g and 180 silicon dice), operated on surface with a lead shield and a copper cryogenic shield. The recorded background is compared with Geant4 simulations conducted by the collaboration.

Currently, the collaboration is focused on building BULLKID-DM, an experiment aimed at searching for WIMP-like Dark-Matter particles with mass below 1~GeV and cross-section with nucleons smaller than $10^{-41}$~cm$^{2}$. The target of the BULLKID-DM experiment consists of a stack of BULLKID detectors and will amount to 800~g subdivided in more than 2000 silicon dice.

Aside from BULLKID-DM, there is also an ongoing R\&D aimed at transferring this detector technology to a germanium substrate. Changing to a higher nuclear mass target is imperative for a possible CE$\nu$NS experiment. Due to the initial promising results on this experimental effort, the performances of a germanium-based BULLKID array have been characterized and will be here presented.

Speaker: Leonardo Pesce (Sapienza/INFN)

Pesce BULLKID ICHEP.pdf

12:00 PM The Light Dark Matter eXperiment

Searching for dark matter (DM) remains one of the central challenges in high-energy physics. While collider and direct detection experiments have explored the 1-10,000 GeV mass range, the sub-GeV regime (0.001–1 GeV) remains largely unconstrained. The Light Dark Matter eXperiment (LDMX) is a proposed fixed-target experiment at SLAC, designed to probe this unexplored parameter space using the 8 GeV electron beam at the LCLS-II facility. LDMX employs a missing-momentum and missing-energy technique to search for invisible final states produced in electron–nucleus interactions. The detector is optimized to operate in a near zero-background regime through stringent vetoing of Standard Model processes using a high-granularity electromagnetic calorimeter, a hadronic calorimeter, and a precision tracking system. In this talk, we present the detector design of LDMX, and discuss strategies for identifying DM signals. We describe traditional discriminant-based approaches using calorimetric information, as well as advanced machine-learning techniques, including boosted decision trees and graph neural networks, to enhance signal–background separation. We also report initial results from a recent LDMX prototype run, which demonstrated stable and uniform data acquisition across all detector subsystems. Finally, while LDMX targets a zero-background operating regime, we present complementary results based on data-driven background predictions using looser selection criteria.

Speaker: Dr Tamas Almos Vami (Univ. of California Santa Barbara (US))

20260730_ICHEP_LDMX.pdf

10:45 AM → 12:30 PM Education & Outreach

Convener: Pedro Abreu (Laboratory of Instrumentation and Experimental Particle Physics (PT))

10:45 AM Physics for all ages: ATLAS educational printables for informal learning

The ATLAS Collaboration at CERN has developed a wide array of resources to support informal education for all ages. From colouring books and activity sheets for children, to fact sheets and cheat sheets for more advanced learners, ATLAS Outreach provides a collection of printable resources that can be used to learn more about particle physics and the ATLAS detector. In particular, ATLAS recently released an updated version of one of its colouring books, with brand-new illustrations and a focus on detector upgrades for HL-LHC. All these resources can be used in diverse contexts: at home, in classrooms, at science festivals and outreach events, and more. To ensure global accessibility, the resources are translated into multiple languages. This contribution highlights the most recent content additions, and the collaborative workflow behind these resources, from topic identification and design, to review and translation.

Speaker: Silke Mobius (Universitaet Bern (CH))

ICHEP26_PrintablesSilkeMoebius.pdf

11:00 AM The International Particle Physics Outreach Group (IPPOG) - Engaging the world with science

The pillar for outreach in particle physics is IPPOG, the International Particle Physics Outreach Group. IPPOG is a network of scientists, science educators and communication specialists working across the globe in informal science education and public engagement for particle physics. Its flagship activity is the International Particle Physics Masterclasses programme, to which the Worldwide Data Day has been added. Activities related with cosmic rays, such as the International Cosmic Day and International Muon Week are also promoted and supported by IPPOG. Members of IPPOG also participate in a wide range of events: public talks, festivals, exhibitions, teacher training, student competitions, and open days at local institutes. A resource database has also been developed containing a wealth of material for the dissemination of particle physics. In this presentation the history and evolution of IPPOG will be presented briefly, and its various activities will be discussed.

Speaker: Steven Goldfarb (University of Melbourne (AU))

Goldfarb-IPPOG-20260730-compressed.pdf

Goldfarb-IPPOG-20260730-compressed.pptx

11:15 AM Seeing Neutrinos with DUNE: An Event Display for Outreach and Open Data

The Deep Underground Neutrino Experiment (DUNE) is a next generation long baseline neutrino experiment based at Fermilab, with a near detector near the beam target and a Far Detector (FD) in South Dakota. As the experiment prepares for its first data runs, creating pathways for public engagement and data transparency is essential. We present the first-ever DUNE event display designed for public outreach and education. Developed using data from the ProtoDUNE detectors at the CERN Neutrino Platform, this tool provides an intuitive and interactive interface that allows non-experts to visualise and explore particle interactions in a Liquid Argon Time Projection Chamber (LArTPC). By translating raw experimental data into a browser-accessible format, we establish the essential infrastructure for DUNE’s pathway to open data. This talk will detail the technical development of the display, its current implementation with ProtoDUNE data, and the strategic road map for integrating it into DUNE’s long-term open-access framework.

Speaker: Eva Sabater Andres (University of Sussex (GB))

DUNE_evd_ICHEP2026.pdf

11:30 AM Evaluating the Impact of Outreach Exhibitions and User Experience at the Pierre Auger Observatory

Since 2001, the Pierre Auger Observatory’s Visitor Center has served as a bridge between complex astrophysics and the public. In recent years, the center has undergone a significant transformation in content delivery, guided by specialized studies in user-centered design, user experience, and the cognitive and emotional dimensions of learning. These updates aim to enhance scientific literacy, foster a sense of "knowledge appropriation," and address areas for improvement identified through direct visitor feedback. To evaluate this evolution, the Observatory conducted a comprehensive social impact study focusing on its local community and the effectiveness of its public communication strategies. The research employed a qualitative, phenomenological design to explore how participants interact with materials and how staff perceive these engagement activities. To ensure academic rigor, the team utilized Reflective Thematic Analysis alongside quantitative surveys. This methodology allowed for the identification of patterns and themes within the data, ensuring the validity of the results, which we present in this contribution. Ultimately, this framework provides a robust mechanism to align institutional goals with visitor preferences, evaluating how strategic development decisions directly influence the visitor experience.

Speaker: Beatriz Garcia (Pierre Auger Observatory)

ICHEP_26_Outreach-Auger.pdf

11:45 AM From Awareness to Action: Engaging High-School Girls in Particle Physics

Following the United Nations' establishment of the International Day of Women and Girls in Science (IDWGS) on February 11, IPPOG launched a special edition of the International MasterClasses dedicated to high-school girls. The SPRACE Outreach Group promptly embraced this initiative, organizing its first IDWGS celebration in February 2017. Ever since we have developed a dynamic program that goes beyond the traditional MasterClass activities, designed to address barriers facing young women in STEM.
Our program combines the standard hands-on particle physics analysis with CMS data, with interventions to inspire and empower the participant girls: round-table discussions with women scientists sharing their career paths and challenges, interactive physics demonstrations, and a special session conducted by psychologists for helping the students identify and overcome barriers to STEM careers.
This talk will present our approach, share insights from ten years of implementation, and discuss how these complementary activities create a supportive environment that encourages young women to envision themselves as future physicists, aiming to build a diverse talent pipeline for high-energy physics.

Speaker: Sandra Padula (UNESP - Universidade Estadual Paulista (BR))

SandraSPadula-ICHEP2026-E&O-GirlsInScience.pdf

10:45 AM → 12:30 PM Strong Interactions and Hadron Physics

Convener: Patricia Magalhaes (UNICAMP)

10:45 AM Measurement of the relative phase between strong and EM decays

The strong and electromagnetic interactions are two main decay mechanisms in charmonium decays. The relative phase between them is a basic parameter in understanding the decay dynamics, especially for the precise measurements. In this talk, we present the direct measurement with resonance scan method. By introducing the EM amplitude from continuum decay, the interference between EM and strong mechanism is measured in $J/\psi$ decays to several final states.

Speaker: Francesca De Mori

ICHEP_demori_phase_indico_nospares.pdf

11:00 AM Heavy-hadron production at small $x$

The development of a fully consistent framework for QCD dynamics at small $x$ remains an open challenge. In this regime, heavy-flavor production provides a particularly clean and sensitive probe, both experimentally and theoretically.

In recent years, we have made several important improvements to the $k_t$-factorization formalism, in particular through a complete and consistent implementation of this approach within a variable-flavor-number scheme. In this contribution, we review these developments and present phenomenological results.

In particular, we report predictions for $D$ and $B$ mesons, obtained in response to the ALICE collaboration, which show good agreement with experimental data. We also present recent results for heavy baryons and the $B_c$ meson.

Speaker: Benjamin Guiot (Universidad frederico santa maria)

ICHEP2026.pdf

11:15 AM Quarkonia production and polarization in proton-proton collisions with ALICE

The production of heavy quarkonium—bound states of a heavy quark (charm or beauty) and its corresponding antiquark—in high-energy proton-proton (pp) collisions provides a sensitive probe of both perturbative and non-perturbative aspects of quantum chromodynamics (QCD), making it a theoretically challenging process to describe. Precise measurements of quarkonium production cross sections and polarization in pp collisions are therefore essential for constraining theoretical models and improving the understanding of charmonium production mechanisms. In ALICE, the excellent reconstruction capabilities for quarkonium states enable their use as versatile probes for exploring various aspects of QCD. Correlating quarkonium yields with event activity offers insights into the interplay between hard and soft processes in hadronic collisions. In addition, proton–quarkonium femtoscopy measurements can provide valuable information on the quarkonium–nucleon interaction, potentially connecting to studies of exotic pentaquark states. In this contribution, we present new measurements of charmonium and $\Upsilon(1S)$ production in pp collisions, as well as J/$\psi$ polarization at mid and forward rapidity. Results on J/$\psi$ production as a function of event multiplicity and the first preliminary measurements of proton–J/$\psi$ femtoscopy are also reported.

Speaker: Lorenzo Mattei (Université Clermont Auvergne (FR) / Università di Torino (IT))

ICHEP26_Mattei_v6_final.pdf

11:30 AM Testing pQCD calculations with charm- and beauty-hadron production in pp collisions with ALICE

Heavy quarks, namely charm and beauty, are predominantly produced in initial hard-partonic scatterings. Owing to their large masses, their production can be calculated within the perturbative quantum chromodynamics (QCD) framework, while their hadronisation provides unique sensitivity to non-perturbative QCD dynamics.
Theoretically, the production of heavy-flavour hadrons can be calculated within a factorisation approach that convolutes the parton distribution functions of the colliding protons, the partonic cross section, and the fragmentation functions. Consequently, measurements of these cross sections in proton--proton (pp) collisions provide excellent tests of pQCD-based calculations. Furthermore, the relative abundances of different heavy-flavour hadron species offer insight into hadronisation mechanisms.

In this contribution, new measurements based on Run 3 pp-collision data at $\sqrt{s}=13.6$ TeV are presented. New results of non-strange D-meson production and B-meson production are reported, allowing tests of QCD dynamics at two different mass scales.
The charmed-strange baryon $\Xi_{\mathrm{c}}^{+}$ is measured for the first time with ALICE via the $\Xi_{\mathrm{c}}^{+} \rightarrow \mathrm{pK^{-}\pi^{+}}$ decay channel, thanks to the improved tracking and vertexing capabilities. The role of event activity in charm hadronisation is further explored through measurements of the multiplicity dependence of the $\Lambda\mathrm{_{c}^{+}/D^{0}}$ ratio and of the self-normalised yields of $\Xi_{\mathrm{c}}^{+}$ and $\Omega_{\mathrm{c}}^{0}$.

Speaker: Himanshu Sharma (Universita e INFN, Padova (IT))

ICHEP2026_hsharma.pdf

11:45 AM Soft QCD measurements at CMS

Recent results of soft and small-x QCD measurements with the CMS experiment.

Speaker: Martijn Mulders (CERN)

CMS_soft_QCD_for_ICHEP2026_Mulders.pdf

12:00 PM Precise measurements of W, Z boson production with the ATLAS experiment

The study of single W or Z boson production at the LHC provides stringent tests of the electroweak theory and perturbative QCD. World first measurements of the complete set of angular coefficients and full phase-space differential cross-sections of W boson production are presented. The measurements use low pileup data which allow an optimised reconstruction of the W boson transverse momentum. Cross section data of off-shell W boson production are also shown, as well as measurements of Z boson production cross section in the full phase space of the decay leptons. The recoil of the Z-boson is sensitive to quark and gluon emissions and is used to determine the strong coupling constant in a novel and precise approach.

Speaker: Manuella Vincter (Carleton University (CA))

talk_Vincter_ICHEP_Brazil.pdf

10:45 AM → 12:30 PM Beyond the Standard Model

Convener: Andre Lessa (Universidade de Sao Paulo)

10:45 AM Search for the X17 particle with the PADME detector

The PADME experiment at the Frascati National Laboratory of INFN has performed a
search for the hypothetical X17 particle, by observing the product of the collisions
of the positron beam from the DAΦNE LINAC on a diamond fixed target.
The beam energy has been varied in the range
265–300 MeV, corresponding to an e^+e^- center of mass energy between 16.4 and 17.5 MeV,
completely covering the region identified by the
ATOMKI collaboration as significant for observing the postulated X17 particle.
The result of the analysis shows an about 2-sigma excess at mass consistent with
the ATOMKI experiment. A new data taking campaign, with an improved detector
has been carried out during the summer and fall of 2025, with the aim of pushing forward the
sensitivity of the search.

Speaker: Andre Frankenthal (University of California Irvine (US))

ICHEP2026_PADME_Frankenthal.pdf

11:00 AM The NA64-e experiment at CERN - status and perspectives

Several astrophysical and cosmological observations indicate that the majority of the mass of the Universe is composed by Dark Matter, that could belong to a dark sector (DS) of new particles. The NA64 experiment at CERN SPS searches for DS particles using high-energy beams impinging on a thick active target, adopting missing energy/momentum techniques with electrons, positrons, muons, and hadron beams.

In the $e^\pm$ modes, DS particles may be produced in the active target via bremsstrahlung or annihilation processes, with the signal signature given by events with large missing energy. Backgrounds are suppressed using an upstream beam-tagging system, to identify and reject beam contaminants and a downstream hadronic calorimeter to measure secondary

Since 2016, NA64 has reported competitive results based on a total accumulated statistics of 1E12 electrons-on-target, excluding the cosmological DS hypothesis for selected model realizations. The experiment aims to comprehensively probe the DS parameter space before CERN LS4. This talk presents the latest NA64-e results and discusses future prospects.

Speaker: Anna Marini (INFN-Genova)

ICHEP2026_AnnaMarini.pdf

11:15 AM On axion interaction rate from thermal QCD

We investigate axions thermally coupled to non-Abelian gauge fields, where the heat bath's preferred reference frame makes axion production sensitive to distinct kinematic limits. The contribution to ∆Neff depends on light-like momentum, while the physics of warm natural inflation, ultralight dark matter, and the strong sphaleron rate depends on the vanishing-momentum limit. Focusing on the soft energy regime, we construct an HTL-based interpolation between these domains, compare it with lattice data, and link it to NLO results. We re-investigate light QCD axion decoupling dynamics at T ≥ 200 MeV, showing that efficient interactions in the ultrasoft domain increase the ∆Neff.

This work builds upon the results of arXiv:2601.08221.

Speaker: Gustavo Sakoda (University of São Paulo)

ICHEP-Talk-Oficial Version-Split.pdf

11:30 AM Hunting for ALPs in meson and gauge bosons LFV decays

Axion-like particles (ALPs) arise in many well-motivated extensions of the Standard Model that address its open questions. Experimental constraints are strongest for light ALPs, particularly those with sizable couplings to photons and gluons. In this talk, I focus on the comparatively unexplored scenario of heavier ALPs ($m_a > m_\mu$) that couple predominantly to leptons, allowing for lepton-flavour-violating (LFV) interactions.

Above the muon threshold, the stringent bounds from LFV decays such as $\mu \to e a$ no longer apply, while conventional long-lived particle searches rapidly lose sensitivity because the ALP typically decays promptly once the $a \to \mu e$ channel opens. I show that this gap can be explored by searches for ALPs produced in meson, electroweak gauge boson, and tau decays. I demonstrate that current and future experiments, including Belle II, FCC-ee, CEPC, and SHiP, can access previously unconstrained regions of (leptophilic) ALP parameter space.

Speaker: Marco Ardu

ICHEP_ardu.pdf

11:45 AM Search for new physics with charm data at BESIII

The BESIII experiment has collected 10 billion J/ψ events, 2.6 billion ψ(3686) events, 20 $fb^{-1}$ of D meson pairs at 3.773 GeV, and 7.33 $fb^{-1}$ of $D_sD_s^*$ events from 4.128 to 4.226 GeV. The huge data samples allow us to search for new physics beyond the standard model with rare decay processes in charm data. In this talk, we report the search for baryon number violation processes J/ψ→pe and J/ψ→$\Lambda \bar{\Lambda}$, lepton number violation processes Φ/ω/η→π+π+e-e-, $D_s^+$→$h^-h^0e^+e^+$, Ξ-→Σ$^+e^-e^-$ and J/ψ→$K^+K^+e^-e^-$, lepton flavor violation process ψ(3686)→eμ. The search for new physics with J/ψ weak decay J/ψ→γ$D^0$, J/ψ→$D^0μ^+μ^-$, J/ψ→$D^0K^{0*}$, J/ψ→$D_sρ/D_sπ$ and J/ψ→$D_seν$ will also be presented.

Speaker: Xinyu Chai (Peking University)

ICHEP_report_XinyuChai.pdf

10:45 AM → 12:30 PM Operation, Performance and Upgrade of Present Detectors

Convener: Sarah Porteboeuf (Université Clermont Auvergne (FR))

10:45 AM Performance of the CMS Silicon Tracker in Run-3

The Silicon Tracker of the Compact Muon Solenoid (CMS) is the innermost sub-detector of the experiment and is responsible for measuring charged particles produced in high-energy collisions at the Large Hadron Collider (LHC). It consists of an inner pixel detector with 1,856 modules and an outer strip detector comprising 15,148 modules, together forming the world’s largest silicon tracking system.

The LHC has been operating for over a decade in multi-year data-taking periods, known as runs, interspersed with extended maintenance and upgrade phases called Long Shutdowns. Since the start of Run-3 in 2022, planned to conclude on 29 June this year, the LHC has delivered exceptional instantaneous and integrated luminosity, surpassing both accelerator and detector design expectations. While this performance enables the collection of high-quality physics data, it also presents significant challenges for detector operation.

Due to its proximity to the interaction point, the CMS Silicon Tracker is particularly affected by the harsh radiation environment. This presentation provides an up-to-date assessment of the detector’s low-level performance, the impact of radiation damage, and the mitigation strategies implemented to ensure reliable operation throughout CMS Run-3 data taking.

Speaker: Lakshmi Priya Nair (Deutsches Elektronen-Synchrotron (DE))

TrackerPerformance_ICHEP2026.pdf

11:00 AM The ATLAS ITk Strip Detector: design and expected performance

The ATLAS Inner Tracker (ITk)Upgrade Strip detector for the High Luminosity Large Hadron Collider (HL-LHC) is described. The all-silicon ITk will replace the current ATLAS Inner Tracker. This is required because HL-LHC will have particle densities and radiation levels a factor of 10 compared to the current LHC, with up to 200 proton-proton interactions in a typical bunch crossing. This requires the new tracking detector to be faster and more highly segmented. The sensors need to be far more resistant to radiation and have a much greater power delivery to the front-end (FE) systems. However, material must be kept to a minimum. The ITk Strip detector contains four layers in the barrel and six in each of the two endcaps, covering pseudorapidity (𝜂) range of |𝜂| < 2.7. The silicon sensors along with application specific integrated circuits (ASICs) and the high and low voltage power controls for the sensors are integrated in a module. These modules are placed on staves in the barrel and petals in the end-caps, providing mechanical support for the modules and host the common electrical, optical and cooling services. This talk gives a general overview of the detector, presenting its structures, final designs and detecting technologies.

Speaker: Chilufya Mwewa (DESY)

ATLAS_ITK_Strips_MWEWA.pdf

11:15 AM Track and Vertex Reconstruction for the ATLAS Inner Detector

During Run 3 of the Large Hadron Collider, ATLAS has operated in an unprecedented experimental environment, with record instantaneous luminosities and proton–proton collision rates pushing charged-particle reconstruction to its limits. Robust and efficient tracking is therefore a cornerstone of the ATLAS physics programme.
This contribution presents the charged-particle and primary-vertex reconstruction in the ATLAS Inner Detector, focusing on the algorithms and software configuration deployed for Run 3 data taking. The performance of the reconstruction is evaluated using Run 2 and Run 3 collision data, as well as simulated samples processed with the updated software. Excellent tracking and vertexing performance is demonstrated in high-occupancy conditions, with high reconstruction efficiency, precise parameter resolution, and a low rate of mis-reconstructed tracks sustained for up to 80 simultaneous interactions per bunch crossing.
In addition, dedicated track reconstruction passes developed to enhance sensitivity in specific physics topologies are discussed, illustrating the flexibility of the ATLAS tracking framework in addressing the diverse challenges posed by current and future LHC running conditions.

Speaker: Jackson Carl Burzynski (University of Oklahoma (US))

Burzynski_ICHEP_Tracking_Builds.pdf

11:30 AM Operational experience and performance of the Silicon Vertex Detector during Run 2 of Belle II

Run 2 of the Belle II experiment began in 2024. With new data, the SVD confirmed high hit efficiency, large signal-to-noise and good cluster-position resolution. SuperKEKB’s instantaneous luminosity is expected to increase significantly, resulting in a larger SVD occupancy caused by beam-related background. Considerable efforts have been made to improve the SVD-reconstruction software by exploiting the excellent SVD hit-time resolution to determine the collision time and reject out-of-time hits caused by the beam-related background. A novel procedure to group SVD hits event-by-event, based on their time, has been developed by using the grouping information during reconstruction, significantly reducing the fake rate, while preserving the tracking efficiency. The front-end chip (APV25) is operated in “multi-peak” mode, reading six samples. During data taking, we tested a 3/6-mixed acquisition mode, based on the timing precision of the trigger, that reduced background occupancy, trigger dead-time and data size. Studies show a moderate radiation-induced increase in sensor current and strip noise. However, such damage will not degrade the performance during the lifespan of the detector.

Speaker: Tomoyuki Shimasaki

svdtalk_20260730.pdf

11:45 AM Understanding the ITk Production Database

The ATLAS experiment will replace their tracking detector with a new all-silicon Inner Tracker (ITk) for data-taking at the High Luminosity LHC. The tracker is being assembled from more than 10^6 parts at sites across the world. To monitor the global production chain a custom production database (PDB) is has been developed to track quality and rates of production, as well as identify possible sources of issue observed during construction or detector operation.

Database tools for interaction and reporting have been developed within the collaboration for users with diverse skill-sets. Upload tools include a pythonic API wrapper, GUIs, command-line scripts, containerised applications, and various CERN hosted resources. Reporting channels provide information on site-specific and project-wide inventories, part quality and production yields and rates.

Production for most detector parts is ongoing and significant experience has been collected for interactions with the PDB. This presentation provides examples of how the ITk PDB is populated and utilised across the collaboration, applicable to future HEP-experiment projects. General themes of data management, multi-user global accessibility and effective data utilisation will be discussed and assessed. The authors seek to promote information exchange and collaboration on tools which supports detector construction in large-scale experiments.

Speaker: Sven Wonsak (University of Liverpool (GB))

ITk-Database_Wonsak.pdf

12:00 PM Radiation Damage and Operation of the LHCb Upgrade I Vertex Locator

The LHCb (Large Hadron Collider Beauty) experiment is a dedicated machine for precision measurement of CP (Charge Parity) violation and rare processes in heavy flavour physics. For operation during Runs III and IV at the LHC, a complete overhaul of the VELO (VErtex LOcator) was installed and commissioned in 2022. The VELO was completely redesigned replacing the original strip detector with a hybrid-pixel design using 130 nm CMOS to survive the new luminosity and radiation targets—being exposed up to 8.0×10^15MeV neq/cm2 by the end of Run IV. The Upgrade I VELO has now been operating at the LHC since 2022, receiving a fluence does of O(10^15)MeV neq/cm2 in its most inner regions; doubling the dataset available to analysts. New results on the operational characteristics of the Upgrade I after 3 years of operation will be presented prioritising key performance metrics. Alongside this, novel techniques for characterising radiation damage with the digital readout will be presented showcasing through life performance of the detector. These novel results will support detector development as we reach the next radiation and luminosity frontiers in high energy physics.

Speaker: Maria Pycior (AGH University of Krakow (PL))

ichep26_natal_radiation_NEW (1).pdf

12:15 PM Real-time alignment and calibration performance of LHCb with Run 3 data

The upgraded LHCb detector is now operating at an instantaneous luminosity five times higher than that of Run 2. To handle the increased data rates and more challenging conditions, LHCb has implemented a fully software-based trigger system consisting of two stages. The first stage performs event selection using a fast and simplified reconstruction, while the second stage applies a complete event reconstruction. This architecture enables real-time alignment and calibration immediately after the first trigger stage, ensuring offline-quality detector performance in the second stage. In this presentation, we describe the framework and methodology for real-time alignment of the LHCb detector and highlight key performance results from Run 3 data, including tracking and particle identification performance.

Speaker: Giulia Frau (The University of Manchester (GB))

A&CLHCb_ICHEP2026_GiuliaF.pdf

10:45 AM → 12:30 PM Quark and Lepton Flavor Physics

Conveners: Erica Polycarpo Macedo (Federal University of Rio de Janeiro (BR)), Michal Koval (Charles University (CZ))

10:45 AM Highlights from BESIII

BESIII has collected over 50 $fb^{-1}$ of collision data in the energy range between 1.84 and 4.95 GeV resulting e.g. world record datasets of 10 billion $J/\Psi$, 2.7 billion $\Psi(3686)$ as well as open-charm data sets. Form factors and CKM matrix elements |Vcs(d)| studies are performed. The BESIII experiment allows for precision studies of rare decays, the search for new physics and the identification of exotic QCD states like glueballs, hybrids, multi-quark states.

Speaker: Ulrich Wiedner (Ruhr-Universitaet Bochum (DE))

ICHEP_2026_Wiedner.pdf

11:00 AM Measurements of |Vcd(s)|, decay constants, and form factors in (semi)-leptonic D decays at BESIII

The BESIII experiment has collected 20.3 $fb^{-1}$ and 7.33 $fb^{-1}$ of e+e- collision data at center-of-mass energies of 3.773 GeV and 4.128-4.226 GeV, respectively.
This presentation will provide an overview of recent studies using (semi)-leptonic D decays at BESIII. We will present the first experimental investigation of $D_s^{*+} \to l^+ \nu$ decays, along with improved measurements of the CKM matrix elements $|V_{cd}|$ and $|V_{cs}|$, and the decay constants $f_{D_s^+}$ and $f_{D^+}$ via $D_s^+/D^+ \to \mu^+ \nu$ and $\tau^+ \nu$ decays. Furthermore, we will summarize the most precise results for the transition form factors in $D_{(s)} \to K$, $D \to \pi$, and $D_{(s)} \to \eta^{(')}$ decays. Complementing these leptonic studies, we will discuss progress in semileptonic analyses, including amplitude analyses and branching fraction measurements of $D_{(s)} \to h h l^+ \nu$ and $h h h l^+ \nu$ processes. These studies explore the hadron spectrum through scalar $(a_0, f_0, \sigma)$, vector $(K^*, \phi)$, and axial-vector $(K_1, b_1)$ mesons, and will present experimental results for form factors in decays such as $D \to a_0(980)$, $D \to \sigma$, $D \to K^*$, $D_s \to f_0(980)$, and $D_s \to \phi$.

Speaker: Lei Zhang (Nanjing University (CN))

BESIII_Charm-July30-talk.pdf

11:15 AM Quantum-correlation of neutral charmed mesons at BESIII

BESIII has recently accumulated a large data sample at the $\psi(3770)$ energy point corresponding to an integrated luminosity of 20 $fb^{-1}$. The neutral $D\bar{D}$ pairs produced at $\psi(3770)$ are in a C-odd correlated state, providing a unique laboratory to measure the strong-phase differences between $D^0$ and $\bar{D^0}$ decays. These parameters are essential inputs to CP violation studies in heavy flavour physics, especially the determination of the CKM angle gamma and charm mixing parameters, and the search for indirect CP violation in the charm sector.
In this presentation, we will report the recent progress of new and improved measurements of the strong-phase differences in different neutral D decays at BESIII with the increased data set, along with the CP-even fraction of $D^0 \to \pi^+\pi^-\pi^0$, $K^+K^-\pi^0$, $K^+K^-\pi^+\pi^-$, and $\pi^+\pi^+\pi^-\pi^-$. Furthermore, we will introduce a novel method for analyzing $D\bar{D}$ quantum-correlations using data collected at center-of-mass energies from 4.13 to 4.23 GeV, where the $D\bar{D}$ pairs are produced via $D^*D$ and $D^*D^*$ decays.

Speaker: Shenghui Zeng (University of Bristol (GB))

QC_DD_BESIII_ICHEP26.pdf

11:30 AM Hyperon physics at BESIII

With the large datasets of 𝑒+𝑒−-annihilation at the J/ψ and ψ(3686) resonances collected at the BESIII experiment, multi-dimensional analyses making use of polarization and entanglement can shed new light on the production and decay properties of hyperon-antihyperon pairs. In a series of recent studies performed at BESIII, significant transverse polarization of the (anti)hyperons has been observed in J/ψ or ψ(3686) decays to ΛΣ-bar , ΣΣ-bar , ΞΞ-bar .The decay parameters for the most common hadronic weak decay modes were measured. Due to the non-zero polarization, the parameters of hyperon and antihyperon decays could be determined independently of each other for the first time. Comparing the hyperon and antihyperon decay parameters provides precise tests of direct Δ𝑆 = 1 CP-violation, complemented the studies performed in the kaon sector.

Speaker: Wenjing Zheng (The Institute of High Energy Physics of The Chinese Academy of Sciences)

HyperonPhysics_ICHEP2026.pdf

11:45 AM Lattice QCD form factors for radiative leptonic decays of heavy mesons

We report our ongoing lattice QCD study of radiative leptonic decays of the pseudoscalar mesons $D$, $D_s$, $B$, and $B_c \to \ell \nu_\ell \gamma$. We carry out our analysis on a single JLQCD ensemble with lattice spacing $a=0.044~\text{fm}$. This work is a step towards a complete QCD+QED lattice calculation of these modes, aimed at reducing theoretical uncertainties in the extraction of $|V_{cd}|$ and $|V_{cs}|$ and providing first-principles estimates of the corresponding form factors in the $B$ sector.

Speaker: Teseo San Jose (University of Edinburgh)

teseo_ichep.pdf

12:00 PM Rare charm decays at LHCb

LHCb is playing a crucial role in the study of rare and forbidden semileptonic decays of charm hadrons, which might reveal interactions beyond the Standard Model. We present the latest measurements of charm decays with two leptons in the final state.

Speaker: Giulia Tuci (Heidelberg University (DE))

ICHEP_2026_v2.pdf

10:45 AM → 12:30 PM Heavy Ions

Convener: Raimond Snellings (Nikhef National institute for subatomic physics (NL))

10:45 AM Neutral pion nuclear modification factor in OO and pO collisions with ALICE

Energy loss of high-momentum partons is one of the key signatures of the quark-gluon plasma formed in heavy-ion collisions. Through measurements of the nuclear modification factor $R_{\rm AA}$, where a strong suppression of high $p_{\text{T}}$ particle yields is observed, parton energy loss has been confirmed in Pb--Pb collisions at the LHC. However, in small collision systems, like pp and p--Pb, energy loss has not yet been confirmed.

In this talk, a measurement of the $R_{\rm AA}$ in OO and pO collisions at $\sqrt{s_{\rm NN}} = 5.36$ TeV and $\sqrt{s_{\rm NN}} = 9.62$ TeV, respectively, is presented. These results are based on the measured particle $p_{\text{T}}$ spectra of $\pi^0$ in OO, pO, and pp collisions using the ALICE Electromagnetic Calorimeter. The measurement of the $R_{\rm pO}$ allows precise constraints on cold-nuclear matter effects. In combination with the $R_{\rm OO}$, this allows for a separation of cold and hot nuclear matter contributions and enables a quantitative determination of partonic energy loss in OO collisions. The measurements are compared to theoretical model calculations that include both cold and hot nuclear matter effects.

Speaker: Florian Jonas (CERN)

NeutralPionOO_ICHEP_ApprovedVersion.pdf

11:00 AM Charged-particle multiplicity distribution in high energy p-O collisions

The recent injection of oxygen beams into Run 3 of the Large Hadron Collider brings within reach the opportunity to study particle production in an unexplored energy regime. Particularly, a proton-oxygem ($p$-O) collision offers conditions to investigate the asymmetric production of particles with higher density. This asymmetry can amplify the sensitivity to the internal structure of the nucleus involved in the interaction, and models that allow isolating purely geometric effects from initial states contribute to understanding the impact of the nucleus geometric organization on the final state produced. We studied the multiplicity of charged particles produced in $p$-O collisions using Pythia (Angantyr) and $k_T$-factorization. Oxygen nucleus configurations were sampled by the $\alpha$-cluster model to avaluate both frameworks. These results were systematically compared to those derived from the Woods-Saxon nuclear distribution, taking into account different ranges of pseudorapidity and center-of-mass energies. Our main results show that multiplicity of charged particles is strongly influenced by the initial geometry. Different geometric descriptions of the oxygen nucleus project significantly different multiplicities, especially for large multiplicities and higher pseudorapidity. We also observed that multiplicity of charged particles calculated with Pythia reveals significantly different behavior from that calculated with $k_T$-factorization.

Speaker: Yuri do Nascimento Lima (Universidade de Sao Paulo (USP) (BR))

chargedmultiplicitypOcollisions.pdf

11:15 AM Probing the initial geometry and the onset of collectivity with anisotropic flow in light-ion collisions with ALICE at the LHC

Collective behavior, traditionally associated with heavy-ion collisions, has been observed in small collision systems at the LHC. The recent OO and Ne--Ne collisions allow bridging of the gap between small and large collision systems and enable the study of collectivity in well-constrained initial states. Measurements of azimuthal anisotropies are sensitive to the initial-state geometry and enable detailed investigations of the nuclear structure of $^{16}$O and $^{20}$Ne, highlighting the interplay between nuclear structure and collective dynamics in ultrarelativistic collisions.

This contribution presents recent anisotropic flow measurements performed by the ALICE Collaboration in OO and Ne--Ne collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.36 TeV using two- and multiparticle correlation methods. The results are compared to hydrodynamic calculations incorporating the nuclear structures of these light nuclei, providing stringent constraints on the modeling of the initial state. In addition, prospects for measuring long-range correlations with the forward ALICE detectors are discussed, with the aim of studying the longitudinal dependence of anisotropic flow and thereby constraining the longitudinal structure of the initial state.

Speaker: Alexian Lejeune (Czech Technical University in Prague (CZ))

ICHEP_lightIonsFlow_AlexianLejeune_vFinal.pdf

11:30 AM Charm-hadron elliptic flow in small and large collision systems with ALICE

Charm quarks are produced in the earliest stages of high-energy nuclear collisions and experience the full evolution of the strongly interacting medium created in these collisions. Therefore, charm quarks are considered powerful probes of the collective behaviour of the medium. Measurements of the elliptic flow ($v_{2}$) of charm hadrons in different collision systems provide key information on the onset and magnitude of collectivity and constrain the transport parameters that govern heavy-quark interactions.

This contribution presents an overview of the latest ALICE results on charm-hadron elliptic flow. Measurements of $\mathrm{D^{0}}$–hadron angular correlations in pp collisions at $\sqrt{s}=13.6~\mathrm{TeV}$ reveal collective-like effects even in this very small system, challenging conventional expectations. The first charm-hadron $v_{2}$ measurement in OO collisions at $\sqrt{s_{\mathrm{NN}}}=5.36~\mathrm{TeV}$ extends heavy-flavour flow studies to an intermediate system between pp and Pb–Pb and provides new constraints on the charm spatial diffusion coefficient ($D_{\mathrm{s}}$). The most recent Pb–Pb results at $\sqrt{s_{\mathrm{NN}}}=5.36~\mathrm{TeV}$, delivering the most precise determination to date of D-meson and $\Lambda_{\mathrm{c}}$ $v_{2}$, are also reported. Comparisons between strange and non-strange D mesons, and between mesons and baryons, shed light on the partonic origin of charm flow and on the role of quark recombination in the hadronization process.

Speaker: Chuntai Wu (Universita e INFN, Padova (IT))

ICHEP2026_charmflow_wuct.pdf

11:45 AM First observation of Compton scattering in ultraperipheral heavy ion collisions

A simple model for single photon emission in UPC of relativistic
heavy ions is proposed [1]. This model is a simple generalization
of the Klein-Nystrand model proposed some time ago for vector meson production in UPC.
We calculate rapidity and transverse momentum distribution of
photons produced in the elastic nuclear Compton scattering
with both nuclei in the ground state.
The predictions for ALICE, LHCb and ALICE-3 are presented.
Sizeable cross sections are obtained. The condition of elastic
case imposes that the outgoing photons are relatively soft
as dictated by the nuclear form factor. We take charge form factor
of $^{208}$Pb as representative for the elastic rescattering process.
We discuss also effect of finite acceptance on double photon production
when only one of the photons is registered and the second photon
is not. We consider both standard box diagrams and double photon
fluctuations into light vector mesons.
In addition, We discuss also a potential double scattering (DS)
processes which lead to production of two photons which is similar to
genuine $\gamma\gamma\to \gamma\gamma$ scattering in UPC.
Sizeable cross section for DS is found for the ALICE-3 acceptance
and the way how to observe it is discussed.

[1] A. Szczurek, in preparation.

Speaker: Antoni Szczurek

talk_ichep2026_compton.pdf

12:00 PM Open heavy flavour production in light and heavy ion collisions at LHCb

Heavy quarks are powerful probes of both hot and cold nuclear effects in high-energy nuclear collisions. After their production in the collision initial stage, they experience QGP formation and interact with the produced medium through its evolution. The LHCb experiment is uniquely well-suited to studying heavy-flavor production in a variety of systems. During Run 3, LHCb collected its first samples of $p$O, OO, and NeNe collisions during the summer of 2025, and a sample of PbPb collisions with an extended centrality coverage and increased luminosity compared to that from Run 2. In this contribution, first results of open heavy-flavour production in these collisions systems will be presented.

Speaker: Victoria Ramos (Pontifical Catholic University of Rio de Janeiro (BR))

ichepTalkVictoriaRamos.pdf

10:45 AM → 12:30 PM Astroparticle Physics and Cosmology

Convener: Alberto Daniel Supanitsky

10:45 AM Status and Astrophysics Results of the Baikal-GVD Neutrino Telescope

The Baikal-GVD deep-underwater neutrino telescope is approaching a
sensitive volume of 1 km³. We present its current status and primary
astrophysical results based on data collected during its construction
phase. The key achievement is the diffuse astrophysical neutrino flux
measurement. We also report indications of neutrino emission from the
Milky Way and present the results of searches for point-like sources as
well as transient sources. Located in the Northern Hemisphere,
Baikal-GVD provides a unique view of the Galactic Ridge and is poised
for further discoveries as it continues to expand.

Speaker: Bair Shaibonov

Baikal-GVD_Status_and_Results.pdf

11:15 AM Conformal Neutrino Mass Models as Multi-Messenger Sources: Phase Transitions, Gravitational Waves, PBHs, and Magnetogenesis

Classically scale-invariant (conformal) extensions of the Standard Model with a broken $U(1)^\prime$ can provide a mechanism for neutrino mass generation and feature potentially measurable signatures in cosmology. I summarize our results for supercooled first-order phase transitions in conformal neutrino-mass models and their multi-messenger implications. The transition can produce a stochastic gravitational-wave background detectable across nHz-kHz bands, enabling interferometers and pulsar-timing arrays to constrain (or measure) the $U(1)^\prime$ breaking scale and the associated seesaw scale. We identify parameter regions where the nHz signal is naturally enhanced and can match current PTA hints while remaining consistent with cosmological bounds. I then discuss correlated outcomes of prolonged supercooling: sizeable primordial black-hole production that can constitute a substantial fraction of dark matter, and the generation of helical primordial magnetic fields with potentially observable strengths and coherence lengths. Overall, these models provide a concrete, testable link between the origin of neutrino mass and potential observations of gravitational waves, PBHs, and cosmic magnetism.

Speaker: Roman Pasechnik (Lund university)

ICHEP2026_Pasechnik_conformal_multimessenger.pdf

11:30 AM Search of high energy neutrino sources using multi-messenger approach

The sources of high-energy astrophysical neutrinos remain largely unknown. Multi-wavelength observational campaigns have identified a few plausible candidates, but their numbers are very few. We look for an excess of high-energy neutrino events originating from blazar sources, compared to the number we expect from background sources. We generate random samples of events following the right ascension and declination distributions of the high-energy neutrino events detected by the IceCube Observatory and count the coincidences of the generated samples and the true observations within a 2.5$^\circ$ angular separation with the $\textit{Fermi}$-LAT blazar sources. We also investigate blazars located within an angular separation smaller than the maximum positional error calculated on an event-by-event basis by incorporating the event-specific angular uncertainty in neutrino localization and analyze the characteristics of these blazars to assess their plausibility as neutrino sources. We find an excess of high-energy neutrino events from the directions of $\textit{Fermi}$ blazars beyond random coincidence, with a significance of 2.82$\sigma$. Among the fifteen blazars that lie within the neutrino error regions and have a maximum number of neutrino events around them, the sources 4FGL J0509.4+0542 and 4FGL J0852.2+2834 are identified as high energy neutrino source at 3$\sigma$ significance.

Speaker: Mr Rajendra Neupane (Central Department of Physics, Tribhuvan University, Kathmandu, Nepal)

Presentation_Slides_ICHEP_2026_Natal_Brazil.pdf

10:45 AM → 12:30 PM Detectors for Future Facilities, R&D and Novel Techniques (including Quantum Sensors)

Conveners: Antonio Pellegrino (NIKHEF (NL), University of Groningen (NL)), Antonio Vilela Pereira (CBPF - Brazilian Center for Research in Physics (BR))

10:45 AM A high-rate drift chamber with super-small cells for the Super Tau-Charm Facility

The Super Tau-Charm Facility (STCF) is a new electron-positron collider proposed in China to serve as a crucial platform for Tau-Charm physics research. The main drift chamber (MDC) is the primary component of the STCF tracking system, which responsible for reconstructing the momentum of particles by measurement of trajectories of particles and measuring the energy loss information in each drift cell for particle identification. Because the peak luminosity of the STCF is much higher than other similar experiment, the high-rate requires a significant challenge for the MDC in STCF in high luminosity conditions. In addressing this key issue, research work from two aspects including detector and electronics are proposed in this paper. A full-length prototype detector with super-small drift cells in about 5 mm are developed to reduce the counting rate of each cell, as well as the feedthrough. The multi-channel readout electronics based on a waveform distinction algorithm in high-rate implemented in field-programmable gate array (FPGA) are designed to measure the charge and time information of the detector signals and provide the trigger information. Preliminary tests indicate that the system can achieve above 200 kHz high-rate and meets the requirement of STCF.

Speaker: Xiaoyu Liao (University of Science and Technology of China)

A high-rate drift chamber with super-small cells for the Super Tau-Charm Facility.pdf

11:00 AM Development of monolithic pixel sensor prototypes for the STCF inner tracker

The Super Tau-Charm Facility (STCF) is a high-luminosity electron–positron collider proposed in China, with a designed peak luminosity exceeding $0.5×10^{35} cm^{-2}s^{-1}$. To cope with the high event rate and to ensure high detection efficiency for low-momentum particles, the inner tracker (ITK) must provide high spatial and time resolution while maintaining an extremely low material budget. Monolithic Active Pixel Sensors (MAPS) are a promising technology for the ITK. To meet the specific requirements of STCF, dedicated MAPS prototypes have been developed, and a four-layer detector based on customized MAPS chips is currently under development. This talk will present the design and test results of the MAPS prototypes, as well as the conceptual design of the MAPS-based inner tracker.

Speaker: Jiajun Qin (University of Science and Technology of China (CN))

MAPS for STCF ITK -- JiajunQin.pdf

11:15 AM Tracking and PID Performance of the INTREPID Drift Chamber for the IDEA Detector

IDEA (Innovative Detector for an Electron–Positron Accelerator) is a general-purpose detector concept for studying electron–positron collisions over a wide energy range at a future circular e⁺e⁻ collider. Its central tracking system is an integrated detector composed of a silicon-based vertex detector, a large-area silicon wrapper, and the INTREPID (INner TRacker Equipped with Particle IDentification) drift chamber (DCH). The INTREPID DCH is a helium-based, ultra-low-mass detector conceived to provide efficient tracking, high-precision momentum measurements, and excellent particle identification (PID) by exploiting the cluster counting technique.
We present the tracking and PID performance of the IDEA tracking system evaluated using full simulation studies based on the Geant4 toolkit within the Key4hep ecosystem, including the complete signal digitization and track reconstruction chain. Realistic full-event simulations are used to assess PID performance, employing dedicated algorithms to convert the Geant4 energy-deposit information into cluster number and size distributions.
The results demonstrate that cluster counting provides a PID resolution approximately a factor of two better than the traditional dE/dx method. Beam test results obtained at CERN with drift chamber prototypes using muons over a wide range of βγ are also presented and compared with the simulations.

Speaker: Giovanni Francesco Tassielli (INFN Lecce & Universita Mercatorum (IT))

Tracking and PID Performance of the INTREPID Drift Chamber for the IDEA Detector.pdf

11:30 AM LHCb VELO Upgrade 2

LHCb plans an Upgrade II detector for 2035 to operate at luminosities of $1.0\times10^{34}cm^{-2}s^{-1}$, accumulating over 300 fb$^{-1}$. This will result in about 30 interactions per crossing, producing approximately 1500 charged particles within acceptance.

The higher luminosity requires an enhanced VErtex LOcator (VELO) to handle increased occupancies and radiation. New techniques will assign b hadrons to their origin vertices and perform real-time pattern recognition, involving a new 4D hybrid pixel detector with advanced rate and timing capabilities.

Prototype front-end ASICs are under design in 28nm technology, including large processing power and rapid analog response, which requires fast rise times and high power consumption, yet limited by vacuum operation and cooling constraints. The ASIC must handle extreme hit rates and added timing information. The sensor must provide time measurements with 35ps resolution and resist high fluence while keeping the and spatial resolution below 10 µm.

The mechanical design will minimize material and achieve an integrated module with thinned sensors and ASICs combined with lightweight cooling.

This presentation will highlight promising technologies for the LHCb upgrade, emphasizing on timing precision for vertexing in next-generation detectors. Recent beam test results on time measurements and R\&D of new sensor technologies will be presented.

Speaker: Vinicius Franco Lima (Federal University of Rio de Janeiro (BR))

ICHEP_2026_VFL.pdf

11:45 AM The LHCb MightyTracker for Upgrade 2: Pixels and Scintillating Fibres

The LHCb experiment at CERN will undergo a second updated in the long shutdown 4 of the LHC (2034-2035) to operate at a maximal instantaneous luminosity of 10^34cm^−2s^−1 in Runs 5, five times higher than Run 3 and 4. In Upgrade II, new tracking stations, collectively called the MightyTracker, will replace the Scintillating Fibre Tracker currently operating in LHCb for Runs 3 and 4. The Mighty Tracker is of hybrid nature, comprising monolothic HV-CMOS silicon pixels in the inner region and scintillating fibres in the outer region. The pixels will provide the necessary granularity and radiation tolerance in the inner region where the SciFi would no longer acceptably perform alone.
New pixel sensors are currently being developed to meet the anticipated requirements in terms of pixel size, timing resolution, radiation tolerance, power consumption and data transmission among other parameters.
Developments in the improved SciFi Tracker will be also presented. The increased levels of non-ionising radiation in the SiPMs of the SciFi tracker necessitate Cryogenic cooling to 100K, with new novel detector technologies such as micro-lenses enhancing the single photon detection capabilities. Cryo-cooled demonstrators have been constructed and tested. The search for new scintillating fibres will also be presented.

Speaker: Dr Dirk Wiedner (Technische Universitaet Dortmund (DE))

The LHCb Mighty Tracker Upgrade for the HL-LHC-V1-P2.pdf

The LHCb Mighty Tracker Upgrade for the HL-LHC-V1-P2.pptx

12:00 PM Fast and Scalable Tracking at a Muon Collider with LST

A high energy muon collider delivers exceptional physics reach and creates one of the most challenging tracking environments in collider physics. Intense beam-induced background (BIB) from muon decays generates extremely high inner layer hit occupancy and leads to large demands on computing resources for pattern recognition. These conditions make it essential to co-optimize the tracker layout and the reconstruction algorithms to maximize performance while minimizing cost. This contribution presents the tracking challenge in detail and motivates the need for detectors and algorithms that exploit strong locality, outside-in reconstruction, parallelism, and robustness against dense environments. Line Segment Tracking (LST), originally developed for CMS at the High Luminosity LHC, provides a promising approach: it builds short, locally consistent segments and links them efficiently into full track candidates, a strategy well-suited to highly parallel hardware and high occupancy conditions. The approach naturally extends to efficient reconstruction of displaced tracks. Preliminary studies applying LST principles to muon collider backgrounds demonstrate encouraging performance and scalability. The talk will outline the problem, describe the LST methodology, and show early results illustrating significant mitigation of the tracking burden at a future muon collider.

Speaker: Alexander Tuna (Univ. of California San Diego (US))

Tuna-2026-07-28-lstmucol-03.pdf

10:45 AM → 12:30 PM Artificial Intelligence, Machine Learning and Quantum Computing in HEP

Convener: Vinicius Massami Mikuni

10:45 AM The Qibo Ecosystem: Integrating Advanced QML with Real-Time Hardware Control

We present the latest advancements to the Qibo ecosystem, a full-stack platform for quantum algorithm development, simulation, and hardware execution. Recent developments focused on deeply integrating Quantum Machine Learning (QML) capabilities and real-time hardware control to accel erate research, prototyping, and deployment of quantum applications.

The dedicated Qiboml module introduces a flexible framework that simplifies the construction of complex, composite quantum-classical models and ensures interoperability with established classical ML libraries. This design minimizes the complexity involved in rapid prototyping and experimentation with varied model components, including different derivative rules, noise mitigation techniques, and automated on-the-fly chip re-calibration. The calibration process itself is managed through the Qibocal module.

Its protocol library now extends calibration and stability management beyond single-qubit operations to include support for entangling-gate schemes. These include the operation of flux-tunable transmons, which require the precise handling of pulse distortions. These mechanisms are now formally exposed within Qibolab to ensure their reliable implementation across diverse experimental setups, aligning with the available literature.

Speaker: Matteo Robbiati

ichep26_robbiati.pdf

11:00 AM $S_n$-based quantum machine learning for multi-object tracking

Identity management (IM) for multi-object tracking is the problem of evolving a belief state over track–object associations, accounting for mixing events and measurement uncertainties.

In the most general setting the problem state is described by a probability distribution over the $n!$ permutations of $n$ objects, whose exact representation and update are inefficient in classical computation. This forces machine learning methods to rely on approximations like the evolution of low-order marginal probabilities.

We investigate an efficient, unconstrained quantum machine learning approach based on non-abelian Fourier analysis over the symmetric group $S_n$.

Exploiting the efficient scaling of the quantum Fourier transform for $S_n$, we propose an iterative two-step quantum pipeline. The algorithm models identity mixing events by a diffusion step that acts in the spectral domain, smoothing the probability distribution via its spectral decomposition. The resulting state is then conditioned on identity observations through a Bayes update in the anti-transformed space.

We present the group theoretical formalism underlying the algorithm, and provide a first blueprint for the two main sub-routines, including scalability studies. Finally, we discuss the potential of this framework as a novel quantum machine learning approach to scalable multi-object tracking and related data-association tasks.

Speaker: Matteo Argenton (Universita e INFN, Ferrara (IT))

argenton_quantum_computing_permutations_ichep.pdf

12:30 PM → 2:30 PM Lunch

2:30 PM → 4:15 PM Neutrino Physics

Conveners: Arman Esmaili (PUC-Rio), J. Pedro Ochoa (Berkeley Lab)

2:30 PM New pion production data unveils limitations of neutrino event generators

A major challenge for neutrino oscillation experiments, which rely on wide-band fluxes, is the accurate reconstruction of neutrino energy from observed final-state particles. This reconstruction depends on nuclear and interaction models embedded in event generators, which are limited by underlying assumptions and must be constrained by external data. Electron scattering experiments, which use well-characterized monochromatic beams to offer high statistics cross-section measurements, provide a unique opportunity to directly test key aspects of neutrino event generators. The “Electrons for Neutrinos” (e4ν) collaboration presents new pion production measurement on Carbon. The data is compared against the GENIE event generator, used by the Deep Underground Neutrino experiment. The results highlight the impact of miss-modelling the final state on the neutrino energy reconstruction and offer new constraints for neutrino event generators.

Speaker: Júlia Tena Vidal

ICHEP2026_JTenaVidal.pdf

2:45 PM Modeling Final-State Lepton Polarization in Quasielastic and 2p2h Neutrino Scattering within GENIE

Understanding the polarization of final-state leptons in neutrino–nucleus interactions is essential for studies of fundamental symmetries and precision measurements. We present an implementation of final-state lepton polarization in the GENIE neutrino event generator, with emphasis on charged-current quasielastic (CCQE) and two-particle–two-hole (2p2h) processes.

The polarization vector of the outgoing lepton is computed using a covariant formalism based on the polarization density matrix constructed from leptonic and nuclear tensors. The resulting polarization information is incorporated into the GENIE event record, allowing for detailed studies of spin-dependent effects in event reconstruction and detector simulations.

The implementation has been validated for all CCQE and 2p2h models currently available in GENIE. This development enables systematic investigations of polarization-sensitive observables, such as lepton angular asymmetries and signatures of possible non-standard interactions. It improves the realism of GENIE simulations and provides a framework for more complete modeling of polarization effects in neutrino experiments, including DUNE and Hyper-Kamiokande.

Speaker: Dr Igor Kakorin (Joint Institute for Nuclear Research)

main.pdf

3:00 PM Recent neutrino cross section results from MicroBooNE

MicroBooNE is able to perform mm-scale imaging of the complex topologies resulting from neutrino–nucleus scattering. As a result, MicroBooNE has measured neutrino interaction cross sections on argon spanning four orders of magnitude and across all major interaction modes, a first for any LArTPC experiment. This talk will give an overview of MicroBooNE's most recent neutrino cross section results. We will present our latest νμ CC results without pions in the final state, with particular focus on proton multiplicity, neutrino direction reconstruction for atmospheric oscillation measurements, and progress towards a joint measurement on argon and oxygen with ANNIE. We will also present our latest measurements of νe CC interactions on argon, including new pionless measurements using two different neutrino beams (BNB and NuMI) but in the same detector. These directly constrain the νe/νμ cross-section ratio that forms a key systematic in neutrino oscillation measurements. Finally, we will present progress towards the first-ever measurement of a neutrino-induced neutron production cross section on argon, highlighting novel reconstruction techniques. Together, these measurements showcase our unique sensitivity to probing neutrino interaction modelling at both the nucleon and nuclear levels, providing crucial input for upcoming experiments including SBND and DUNE.

Speaker: Lucile Mellet (Michigan State University)

ICHEP_Talk_Mellet.pdf

3:15 PM Status and Plans for Measurements of Neutrino-Argon Interactions at ICARUS

The ICARUS experiment, utilizing Liquid Argon Time Projection Chamber (LAr TPC) technology, has been installed at Fermilab (USA), following its initial operation in Italy and subsequent refurbishment at CERN. ICARUS has successfully been taking physics data at Fermilab since June 2022. While the experiment’s primary objective is to function as the far detector of the Short Baseline Neutrino program (SBN), searching for hints of physics beyond three-flavour PMNS neutrino oscillations, ICARUS also offers other diverse physics capabilities, including searches beyond the standard model and measurements of cross-sections. In addition to being exposed to the common Booster Neutrino (BNB) beamline of the SBN experiment, ICARUS receives neutrinos from the Main Injector (NuMI) beam. Due to the off-axis angle between NuMI and ICARUS, coupled with contributions from both pion and kaon decays to neutrino fluxes, interactions of NuMI neutrinos within ICARUS can be detected over a range of several GeV in energy. Measurements of these interactions present unique opportunities to infer neutrino interaction cross sections on an argon nuclear target within an energy range that overlaps both the SBN oscillation search and a significant portion of the DUNE spectrum. This presentation will summarise the current status of ICARUS’ neutrino cross-section measurements.

Speaker: Promita Roy (Centre for Neutrino Physics, Virginia tech)

ICARUSXsec_ICHEP2026_PromitaRoy.pdf

3:30 PM Analysis of Neutrino Interactions at T2K with the Upgraded ND280 Detector

T2K is a long-baseline experiment that studies neutrino and antineutrino oscillations by measuring muon neutrino disappearance and electron neutrino appearance over a baseline of 295 km. The magnetized ND280 near detector at J-PARC plays a crucial role in constraining systematic uncertainties associated with the neutrino flux and neutrino–nucleus interaction cross sections. ND280 has recently undergone a major upgrade, including the installation of the SuperFGD, a high-granularity detector composed of approximately two million optically-isolated scintillating cube, along with two horizontal Time Projection Chambers and a plastic-scintillator–based Time-of-Flight system. This upgraded configuration significantly extends the phase space for neutrino interactions, enabling isotropic muon reconstruction, a lower proton momentum threshold, and efficient neutron event-by-event kinetic energy reconstruction via Time-of-Flight measurements. In addition, the upgrade improves the purity of the electron neutrino sample. Following the completion of the ND280 upgrade in 2024, new data have been collected. This presentation will report the first results on event reconstruction performance and neutrino interaction selection with the upgraded detector.

Speaker: Tomislav Vladisavljevic

ichep2026_analysis_of_neutrino_interactions_with_nd280_upgrade_v2.pdf

3:45 PM Neutrino cross-section results from T2K

T2K is a long-baseline experiment for the measurement of neutrino oscillations. The neutrino flux and neutrino-nucleus cross-sections are measured by a suite of near detectors, including ND280, an off-axis multipurpose magnetised detector, WAGASCI, featuring a water-enriched target at a different off-axis angle, and INGRID an on-axis detector composed of sandwiched layers of iron and scintillator.The near detectors perform a wide variety of neutrino-nucleus cross-section measurements on different targets and for different final states. Such a program, to control systematic uncertainties for T2K and beyond, provides high-quality data to benchmark improved models of neutrino-nucleus scattering.We will review the most relevant cross-section results, including Charged Current (CC) interactions on water, Neutral Current interactions (NC) and electron-neutrino CC interactions with pions in the final state.

Speakers: John Columba Nugent (Imperial College (GB)), Dr John Nugent

ICHEP_JN_T2K_Xsec.pdf

2:30 PM → 4:15 PM Dark Matter

Convener: Prof. Björn Penning (University of Zurich)

2:30 PM Physics results of the COSINE-100 experiment and status of the upgraded COSINE-100U detector

The COSINE-100 experiment was a direct detection dark matter experiment located at the YangYang Underground Laboratory in Korea. It operated from September 2016 to March 2023, utilizing an array of NaI(Tl) crystals with a total mass of 106 kg. With an achieved low energy threshold of 0.7 keV, various competitive dark matter search analyses were performed, including a comprehensive test of the annual modulation signal reported by the DAMA/LIBRA collaboration. Following its 6.4-year data-taking phase, COSINE-100 entered its new phase, COSINE-100U. This upgraded version began operation in September 2025 at Yemilab, a new underground facility in Korea, and features improved NaI(Tl) crystals encapsulated with a novel technique to increase light yield, thereby lowering the energy threshold. This presentation will provide an overview of COSINE-100 operation and physics results, along with the report on the initial performance and future prospects of COSINE-100U.

Speaker: Luis Eduardo Funo de Moura Franca (Instituto de Física, Universidade de São Paulo (USP))

COSINEs_ICHEP2026_v2.pdf

2:45 PM The COSINUS direct dark matter search experiment

Direct dark-matter detection experiments aim to observe interactions of dark-matter particles in Earth-bound detectors. However, current results are inconsistent. On the one hand, the DAMA/LIBRA collaboration reports a highly significant annual modulation in their event rate — precisely the signature expected from the Earth’s motion through a galactic dark-matter halo. On the other hand, numerous other experiments report null results, excluding DAMA’s signal under standard assumptions about the dark-matter halo and interaction models.
The COSINUS experiment aims to resolve this long-standing tension by employing NaI as target material — the same as used by DAMA — which enables a model-independent cross-check. COSINUS distinguishes itself by operating NaI as a cryogenic detector, offering event-by-event particle discrimination and low energy thresholds.
This talk will review the current status of NaI-based dark-matter searches and present the COSINUS strategy and timeline, with data taking at the Gran Sasso National Laboratory (LNGS) expected to begin in 2026.

Speaker: Moritz Kellermann (Vienna University of Technology (AT))

ICHEP_v2.pdf

3:00 PM Probing sub-GeV dark matter scattering through sidereal modulation

This work demonstrates how time-dependent analyses can enhance sensitivity to spin-independent (SI) dark matter-nucleon scattering of light (sub-GeV) dark matter candidates. In this mass range, SI scattering cross sections remain largely unconstrained by direct detection experiments due to experimental thresholds. We show that this parameter space can be probed through the Earth shielding of the Galactic dark matter en route to direct detection facilities. The trajectories and spectra of the dark matter particles are progressively distorted with increasing Earth-crossing path length, creating anisotropy in the dark matter flux incident on the detector. Combined with the Earth’s periodic rotation about its axis, this leads to a characteristic daily modulation of the dark matter signal, which can be distinguished from time-independent backgrounds even at very low energy thresholds. We devise statistical techniques which exploit this signature and derive the expected SI dark matter-nucleon cross section sensitivities for noble liquid targets.

Speaker: Dr Tetiana Kozynets (University of Liverpool)

300726_ichep_tetiana_kozynets_sub_gev_dm_modulation.pdf

3:30 PM Probing and Knocking with Muons (PKMu Project)

We propose here a set of new methods involving probing and knocking with muons (PKMu Project). There is a wealth of rich physics to explore with GeV muon beams and cosmic muons. Examples include but not limited to: muon scattering can occur at large angles, providing evidence of potential muon-philic dark matter or dark mediator candidates; muon-electron scattering can be used to detect new types of bosons associated with charged lepton flavor violation; precise measurements of GeV-scale muon-electron scattering can be employed to probe quantum correlations. This presentation is a brief review of several relevant works.

Speakers: Chen Zhou (Peking University (CN)), Qiang Li (Peking University (CN)), Dr Qite Li (Peking University)

Chen_Zhou-PKMu-20260730.pdf

2:30 PM → 4:15 PM Education & Outreach

Convener: Dr Kate Shaw (University of Sussex (GB))

2:30 PM Advancements in ATLAS Open Data

ATLAS has made significant new advances and releases of Open Data in support of a wide variety of community interests and efforts. For the first time, 1 PB of event generator output was released, including 13B events in 6400 datasets, allowing the community to profit from the efforts and resources of the collaboration. This release complements existing data and MC simulation released for research use in 2024. The Outreach and Education Open Data were transformed in 2025: an entirely new release features (public) ntuple-making infrastructure and notebook examples demonstrating everything from fundamental HEP concepts to complex analyses. The overhaul has simplified the user experience: with a few clicks, anyone can make a plot from the Open Data. Newly developed web-based applications are accessible to a wide range of audiences, including non-English speakers. To support the use of these datasets, ATLAS has developed significant supporting infrastructure and documentation, including the atlasopenmagic package, a one-stop shop for metadata, dataset searches, and file identification. The infrastructure includes monitoring of documentation and file accesses to complement existing user surveys. This contribution introduces the new features of the ATLAS Open Data, along with the outcomes from the latest Open Data tutorial and the new monitoring.

Speaker: Carlos Sandoval Usme (Universidad Nacional de Colombia)

ATLASOpenData_ICHEP2026_CSandoval_final.pdf

2:45 PM IPPOG-Masterclasses in Brazil

The IPPOG-Masterclasses give students the opportunity to become particle physicists for a day by analysing real data from CERN’s LHC experiments. The project started in 2005 and has been using LHC-data since 2011. More than 13,000 high-school students from 46 countries participate each year.
In Brazil, the IPPOG-Masterclasses started in January/2008. High school students work with real data collected by the LHC-experiments exploring the fundamental forces and building blocks of nature and are informed about exciting discoveries in particle physics, connecting university, science education, and modern scientific research with the schools. The program offers authentic and valuable experiences to physics education at school, stimulating the students´ interest in science.
Over the years, the Masterclass has grown, reaching 15 out of the 27 Brazilian states, performed as a separate activity, Physics Journeys, Physics Weeks, Science Fairs, offered as a short course in the Physics Teaching Symposium. Many times it inspires young students to follow STEAM careers.
I am the Brazilian National Masterclasses Coordinator and will present a general view of this activity in Brazil on behalf of all organizers spread around the country, which hard work makes the dissemination of the Masterclasses in this huge territory possible.

Keywords: IPPOG-Masterclasses, Hands-on, HEP-training

Speaker: Dr Marcia Begalli (Universidade do Estado do Rio de Janeiro (BR))

ICHEP-2026-Masterclass(3).pdf

3:00 PM Cosmic Rays Module for the Czech Particle Physics Project

We present a new model as a part of the Czech Particle Physics Project (CPPP). This module is intended as a learning tool in masterclasses aimed at high-school students (ages 15 to 18). The module is dedicated to the detection of cosmic rays at Earth. First, the user will read a general introduction about the underlying physics and the tasks. Then, the user will separate real shower events from background noise and determine the direction of the cosmic rays showers. Afterwards the knowledge gained by the user is tested with a short quiz and an opportunity to leave feedback. The module has been tested with high-school students and teachers and their suggestions for optimisations are implemented. The new module is available at the following link: https://cern.ch/cppp.

Speaker: Andre Sopczak (Czech Technical University in Prague (CZ))

CPPP_ICHEP2026.pdf

3:15 PM Bridging the Pedagogical Gap: Longitudinal Analysis of Grade 12 Mathematics Achievement to the Physical Sciences Paper 1 at Basic Educational Level

Academic success in Grade 12 Physical Sciences Paper 1 is strongly influenced by the pedagogical foundations established in Grade 12 Mathematics. In South Africa, the quality of this foundation is critical to achieving the National Development Plan (NDP) 2030 objective of improved learning outcomes and a skilled scientific and technological workforce. This study investigates the relationship between Grade 12 Mathematics performance and Physical Sciences Paper 1 performance using a mixed-methods longitudinal approach. Quantitative data is drawn from National Senior Certificate (NSC) examination records, including a granular analysis disaggregated by province, district, and circuit, and is complemented by a qualitative assessment of instructional practices and systemic educational factors. By combining examination trends with an analysis of underlying socioeconomic and educational factors, the study identifies specific conceptual areas of learner strength and persistent challenges that hinder academic progression. Correlating sub-question level Mathematics outcomes (algebraic logic, functions, calculus, etc.) with the application demands of Physical Sciences Paper 1 (mechanics, electricity, etc.) reveals a structural “fluency gap” that acts as a primary barrier to learner achievement. These interventions are designed for implementation at the secondary school level to bridge the gap between secondary schooling and tertiary physics requirements.

Speaker: Magdeline Mohlao

ICHEP_Presentation__SEABI_MM.pdf

3:30 PM The Standard Model as board game: an outreach project for teaching particle physics

This article presents an account of an outreach experience carried out by undergraduate Physics students at Unicamp with senior high school students. The project focused on teaching concepts of modern physics—especially elementary particles—through three sessions: (1) a discussion of the relationship between the periodic table and elementary particles, addressing how we infer properties of invisible structures; (2) a deepening of how we obtain experimental information about the Standard Model of Particle Physics and an introduction to the Brazilian particle accelerator Sirius; (3) the application of a board game created by the undergraduates to review the content and foster engagement among the high school students. The paper discusses the formative role of outreach, as well as the relevance of the topic for motivating and engaging high school students. The results highlight the importance of initiatives like this for the curricularization of extension, innovatively integrating teaching, research, and outreach. It is hoped that the project presented here can be replicated and expanded, given its potential to open new possibilities in science education and outreach.

Speaker: Adriano Cherchiglia (Universidade Estadual de Campinas)

board_game.pdf

3:45 PM ATLAS Virtual Visits in Brazil – Many stories to tell

The ATLAS experiment is taking data during LHC Run 3 while preparing a number of important upgrade tasks. The detector is, not only one of the most important tools for particle physics discoveries but also an important showcase to present science and engineering to students of different levels.

ATLAS researchers take part on outreach activities, in particular, in the very long standing programme of Virtual Visits since 2010. Profiting either from the open space exhibiting detector parts beside the ATLAS Control Room or directly from the experimental cavern, a video-conference session is established between a reasearcher in loco and the classroom or event venue anywhere in the world. Beyond physics, topics in engineering, detector construction and performance, computing and even machine learning are discussed with the students.

A large number of Virtual Visits were performed with Brazilian institutes, accumulating more than one hundred visits from 2019 to 2025. These efforts are highlighted in ATLAS’ recent publications on its Virtual Visit programme. Here, the mechanism to announce and attract new Brazilian institutes, the development of the visits themselves, as well as the impact of the Virtual Visits in Brazil, are discussed taking the accumulated experience as a starting point.

Speaker: Marcia Begalli (Universidade do Estado do Rio de Janeiro (BR))

Virtual-Visits-ICHEP2026(5).pdf

2:30 PM → 4:15 PM New Developments in Quantum Field Theory, String Theory and Quantum Information in HEP

Convener: Tereza Cristina da Rocha Mendes

2:30 PM New method of quantization for gauge theories with dependent generators

New method is proposed for the quantization of generic reducible gauge theories with linearly dependent generators where the standard quantization ansatz is not applicable since the corresponding De Witt-Faddeev-Popov determinant is degenerate. The method consists in nested factorizations of the gauge group volume for the determination of the correctly defined delta function of reduced gauge conditions, group integration measure and gauge-fixed contribution of ghosts. In comparison with existing generic quantization methods, the method under consideration leads to the functional integral with fewer number of ghosts. This method allows simple enough to carry out a quantization of the various antisymmetric field theories related to low-energy limit of superstring theory or with extended supergravity models. As an application of the method, the quantization of new recently constructed tensor-spinor theory in AdS space is fulfilled and corresponding effective action is derived in terms of the functional determinants of special Dirac-type operators.

Speaker: Prof. Ioseph Buchbinder (Laboratory of Theoretical Physics, Joint Institute for Nuclear Research)

Buchbinder-ICHEP_2026.pdf

2:45 PM Feynman Integrals from First Principles: Positivity, Analyticity, and Padé Approximants

Precise predictions for cross-sections at present and future particle colliders require reliable methods for evaluating multi-loop Feynman integrals, which are often beyond the reach of direct analytic techniques. In this talk, I will present new numerical approaches that exploit general structural properties of quantum field theory—such as positivity and analyticity—to compute Feynman integrals efficiently from limited input data. A key new insight is that, in the Euclidean region, scalar Feynman integrals obey complete monotonicity, a powerful and largely unexplored constraint that, when combined with the differential equations satiesfied by the Feynman integrals, allows their numerical values to be tightly constrained within a systematic bootstrap framework. Moreover, in a broad range of space-time dimensions and propagator powers, Feynman integrals fall into the class of Stieltjes functions, which guarantees the convergence of Padé approximations in the complex plane. This provides a natural framework for constructing accurate rational approximations that remain valid under analytic continuation to physical scattering regions. These ideas point toward a broadly applicable paradigm for numerical multi-loop calculations relevant to collider phenomenology, while highlighting deep connections between Feynman integrals and fundamental principles of quantum field theory.

Speaker: Johannes Henn

2026_07_30_HENN_ICHEP_Stieltjes.pdf

3:00 PM Generalized Mandelstam-Leibbrandt regularization

Algebraic non-covariant gauges are used often in string theory, Chern-Simons theory, gravitation and gauge theories. Loop integrals, however, have spurious singularities that need to be regularized. The most popular and consistent regularization is the Mandelstam- Leibbrandt(ML) prescription. In this work we extends the ML prescription outside the light cone. It shares all the properties of
light-cone ML regularization: It preserves naive power counting and gauge invariance. Moreover, using dimensional regularization(DR), we get a closed form for the basic integrals, including divergent and finite pieces. These results simplify calculations in gauge theories and open new avenues for applications in non-local models.

 Ref.:PHYSICAL REVIEW D 112, 085017 (2025)

Speaker: Prof. Jorge Alfaro (Pontificia Universidad Católica de Chile)

gml.pdf

3:15 PM New results for the 4-loop massive cusp anomalous dimension

I present new results for the massive cusp anomalous dimension at four loops in QCD. I combine partial exact and conjectured analytical expressions with an approximation that is based on the asymptotic behavior of the cusp anomalous dimension to produce the newest estimate. Detailed comparisons are made with previous approximate results that highlight the robustness of the calculational approach.

Speaker: Prof. Nikolaos Kidonakis

Kidonakis-4loopcusp.pdf

3:30 PM Bootstrapping M-theory

In recent years, the non-perturbative S-matrix Bootstrap has emerged as a powerful framework to constrain quantum field theories directly from general principles such as unitarity, analyticity, and crossing symmetry.

In this talk, I will review recent results of this program across different energy scales, including the bootstrap prediction of a previously missing tetraquark state in QCD and rigorous improvements of the Froissart bound on total cross sections.

I will then discuss applications to quantum gravity, with a focus on M-theory. Using consistency conditions of the flat-space S-matrix, I will present universal bounds on low-energy Wilson coefficients in the M-theory effective action, which are not accessible with conventional duality-based methods, paving the road to their first determination.

Speaker: Andrea Leonardo Guerrieri

The Bootstrap siege of M theory .pdf

3:45 PM The QCD world-sheet axion

We report recent results from an extensive study of the flux-tube spectrum and its implications for the existence of an axion on the worldsheet of the confining string. We focus on both closed and open flux tubes in four-dimensional $SU(N_c)$ gauge theories. For closed flux tubes, employing the thermodynamic Bethe ansatz with controlled approximations, we find that a large subset of the low-lying spectrum across multiple quantum number sectors is well described by the low-energy effective theory of a long string, consisting of two Goldstone modes and a massive pseudoscalar identified as the worldsheet axion. For open flux tubes, we observe that many excited states are well approximated by the Nambu--Goto spectrum. However, systematic deviations appear in specific channels, signaling the presence of massive worldsheet excitations. Notably, the mass of one such excitation is consistent with that extracted from the closed flux-tube spectrum.

Speaker: Andreas Athenodorou

ICHEP_2026_Athenodorou_Andreas.pdf

4:00 PM BRST-related symmetries and Gribov ambiguities in the FLPR model

We investigate the FLPR model in a recently proposed framework of BRST-related symmetries and perform its full functional quantization as a gauge invariant system taking into account the Gribov ambiguities and produce a consistent generating functional which can be used as a starting point for the Gribov-Zwanziger-Sorella program. We obtain a family of BRST-related transformations generated by the discrete group of symmetries of the action. We show that gauges possessing Gribov ambiguities lead to a violation of the initial discrete group of symmetries of the gauge-fixed action. The obtained results shed light into similar issues in QCD by the corresponding association of variables and fields between the two systems.

Speaker: Ronaldo Thibes (Universidade Estadual do Sudoeste da Bahia)

Thibes-ICHEP2026-Natal.pdf

2:30 PM → 4:15 PM Strong Interactions and Hadron Physics

Convener: Beijiang Liu

2:30 PM Precision Measurements of Rare χcJ Decays at BESIII

Utilising the world's largest ψ(3686) data sample of 2.7 billion events collected at √s = 3.686 GeV, the BESIII experiment has performed a series of precision measurements on the decays of χ$_c^J$ (J=0,1,2) states. New measurements of the branching fractions for χ$_c^J$ → $2K^+2K^−ω$ and $φK^+K^−ω$ are reported, providing stringent tests of QCD models for multi-body decays. The helicity amplitudes and the branching fraction for χ$_c^J$ → Λ anti-Λ are determined with significantly improved precision, offering a crucial test for theoretical predictions. Furthermore, a search for the electromagnetic Dalitz decays χ$_c^J$ → $e^+e^−ϕ$ sets upper limits on their rates. The observation of χ$_c^J$ → Λ anti-Λ η′ opens a new window to study decays involving both baryons and excited mesons. These results, based on analyses of ψ(3686) → γχ$_c^J$, significantly advance our understanding of the decay dynamics of P-wave charmonia, the role of higher-order QCD processes, and the internal structure of these fundamental systems.

Speaker: Dr Meike Küßner (Ruhr-Universität Bochum)

ICHEP2026_Meike_Kuessner.pdf

2:45 PM Measurement of Lambda hyperons spin correlation in pp and pPb collisions at CMS

The spin correlations of $\Lambda$ hyperons offer a direct window into QCD spin dynamic, including spin-orbit coupling, polarization transfer during hadronization, and possible local spin entanglement in the fragmentation process. With the high-statistics data collected by the CMS experiment, we present the first spin correlation results for $\Lambda\Lambda$, $\Lambda\bar{\Lambda}$ and $\bar{\Lambda}\bar{\Lambda}$ in pp collisions $\sqrt{s}= 13$ TeV and pPb collisions at $\sqrt{s_{NN}}= 8.16$ TeV as functions of spatial distance ($\Delta R = \sqrt{\Delta \eta^{2} + \Delta \phi^{2}}$) between the hyperon pairs. These high‑precision measurements provide new constraints on microscopic models of spin generation and hadronization, enabling discrimination between fragmentation and recombination mechanisms and opening a novel experimental avenue for QCD spin studies.

Speaker: Jieke Wang (Shandong University (CN))

ICHEP2026-JiekeWang-v2.pdf

3:00 PM Production of heavy flavour mesons in CMS experiment

This talk summarizes everything happening in production of heavy flavour mesons, in CMS experiment.

Speaker: Mapse Barroso Ferreira Filho (Universidade do Estado do Rio de Janeiro (BR))

ICHEP_2026_Production_Of_Heavy_Flavour_Mesons_in_CMS_experiment.pdf

3:15 PM Probing hadronization via charm-tagged jets with ALICE

Recent measurements of hadron production have revealed a non-universal behaviour in the fragmentation of partons into baryons in hadronic collisions compared to baselines in $e^+e^-$ and ep collisions. Exploration of this phenomenon is most controlled in the heavy-flavor sector, where the large mass of charm or beauty quarks allows us to experimentally relate a heavy-flavor parton to the resulting hadron. This allows for well-defined measurements of heavy-flavour jet fragmentation, enabling us to take steps beyond the traditional hadronic measurements to unveil the microscopic details of this non-universality.

In this talk, we present measurements of charm jets using jets tagged with reconstructed $\mathrm{D}^{0}$ mesons and $\Lambda_{c}^{+}$ baryons. Using the large data samples collected during Run3 at the LHC, the radial profiles of $\mathrm{D}^{0}$ and $\Lambda_{c}^{+}$-tagged jets are compared to directly probe charm hadronization mechanisms. Comparisons of these results to various event generators employing different hadronization tunes will also be discussed.

Speaker: Christian Reckziegel (Universidade Federal Do ABC (BR))

2026-07-28-Variant_2_Brazil_ICHEP_July_2026_compressed_v6_0.pdf

3:30 PM Study of $\chi_{b1,2}(2P)\to \omega\Upsilon(1{\mathrm{S}})$ transitions in $\Upsilon(3S)\to \gamma\,\chi_{b1,2}(2P)$ decays at $BABAR$

We present the result of a study of the transitions $\chi_{b1,2}(2P)\to \omega\Upsilon(1{\mathrm{S}})$, with $\chi_b$ mesons produced in $e^+e^−\to \Upsilon(3S)\to\gamma\,\chi_{b1,2}(2P)$ reactions. The data were collected with the $BABAR$ detector at the PEP-II asymmetric-energy $e^+e^−$ collider, at the peak of the $\Upsilon(3S)$ resonance. The integrated luminosity of the data sample is 28.0 $fb^{−1}$, corresponding to $121.3\times 10^6$ $\Upsilon(3S)$ decays. Signals of $\chi_{b1,2}(2P)$ are observed over a negligible background. Improved precision measurements of branching fractions are obtained, and the first measurements of the angular distributions are performed. No evidence is found for the presence of a $\chi_{b0}(2P)\to \omega\Upsilon(1{\mathrm{S}})$ decay mode.

Speaker: José Ocariz (LPNHE Université Paris Cité CNRS/IN2P3)

BaBar_Upsilon3S_chib12.pdf

2:30 PM → 4:15 PM Beyond the Standard Model

Convener: Helena Brandao Malbouisson (Universidade do Estado do Rio de Janeiro (BR))

2:30 PM Search for the Lepton Flavour Violating decays $\Upsilon(2{\mathrm{S}}) \to e^{\pm}\mu^{\mp}$ and $\Upsilon(3{\mathrm{S}}) \to e^{\pm}\mu^{\mp}$

Charged lepton flavour violating (LFV) processes are unobservable in the Standard Model, but they are predicted to be enhanced in several new physics extensions. We present the results of a search for $\Upsilon(2{\mathrm{S}})$ and $\Upsilon(3{\mathrm{S}})$ LFV decays to $e^{\pm}\mu^{\mp}$. The search was conducted using data samples consisting of 99 million $\Upsilon(2{\mathrm{S}})$ and 122 million $\Upsilon(3{\mathrm{S}})$ mesons, collected at center-of-mass energies of 10.23 and 10.36 GeV, respectively, by the $BABAR$ detector at the SLAC PEP-II $e^+e^-$ collider.

Speaker: Dr Nafisa Tasneem (St. Francis Xavier University)

Tasneem_Natal_2026.pdf

3:00 PM Searches for heavy exotic quarks or leptoquarks in CMS

We present searches for exotic heavy quarks or leptoquarks using proton-proton collision data collected with the CMS detector. Excited or vector-like top and bottom quarks, and third-generation leptoquarks can all decay to highly energetic third-generation SM quarks. In CMS, searches for these heavy particles span several categories of reconstructed objects, from multi-leptonic to fully hadronic final states.

Speaker: Amandeep Kaur (Rutgers State Univ. of New Jersey (US))

ICHEP2026_LQs_AmandeepKaur_Revised.pdf

3:15 PM Vector-like quarks constrained by rare B dacays

Direct searches for vector-like quarks (VLQs) has set their lower mass limit to be above one TeV. I show that for large VLQ mass, the so-far overlooked one-loop Higgs exchange can have significant effects in flavour changing neutral current (FCNC) processes like rare B decays. I present the constrains on the non-unitarity parameter and VLQ mass using the latest data on B->Xs gamma, Bs->mu+ mu- and B->Xs mu+ mu- when a single down-type VLQ is added to the Standard Model. I also comment on B+->K+ nu bar nu anomaly in light of this constrained new physics scenario.

Speaker: Dr Mohammad Ahmady (Mount Allison University)

ICHEP2026-talk.pdf

3:30 PM Searches for vector-like fermions and leptoquarks with the ATLAS detector

The Standard Model of particle physics explains many natural phenomena yet remains incomplete. Leptoquarks (LQs) are hypothetical particles predicted to mediate interactions between quarks and leptons, bridging the gap between these two fundamental classes of particles. Vector-like quarks (VLQs) and vector-like leptons (VLLs) lie at the heart of many extensions seeking to address the Hierarchy Problem, as they can naturally cancel the mass divergence for the Higgs boson. This talk will present new results from LQ and VLQ searches with the ATLAS detector using proton-proton collision datasets collected during Run2 and Run3 at the LHC.

Speaker: Sebastien Rettie (Nikhef National institute for subatomic physics (NL))

2026.07.30_SebastienRettie_ICHEP2026_v4.pdf

3:45 PM Heavy fermion searches at CMS

We present results of searches for heavy fermions using proton-proton collision data collected with the CMS detector at the CERN LHC.

Speaker: Amandeep Kaur (Rutgers State Univ. of New Jersey (US))

ICHEP2026_HeavyFermion_AmandeepKaur.pdf

4:00 PM Probing ultraheavy $S_{uu}$ diquarks at the HL-LHC through fully hadronic VLQ decays

We study the discovery potential and exclusion reach at the HL-LHC for an ultra-heavy scalar diquark in the multi-TeV mass range, produced via up-quark fusion. We work in a simplified scenario that includes a vectorlike quark (VLQ) with a mass of a few TeV, which can decay as $\chi \rightarrow Wb, Zt,$ or $h^0t$. We focus on fully hadronic decay chains, where the intermediate Standard Model bosons and top quarks decay hadronically, leading to purely hadronic final states with four to six jets. Proton–proton collisions are simulated at $\sqrt{s} = 13.6$ TeV, for integrated luminosities up to $3000~ \text{fb}^{-1}$. Signal–background discrimination is performed with machine-learning classifiers optimized for each topology. Statistical interpretations are obtained from scans of local p-values, CLs, and 95\% C.L. upper limits on the signal strength. We find strong HL-LHC sensitivity to ultra-heavy diquarks across the explored parameter space, with discovery reach or exclusion limits at the level of about 8 TeV. The six-jet channel provides the highest reach, while the four-jet topology offers complementary sensitivity when the branching fraction for $S_{uu} \rightarrow u\chi$ is sizable.

Speaker: Matei Stefan Filip (IFIN-HH (RO))

ICHEP2026.pdf

2:30 PM → 4:15 PM Operation, Performance and Upgrade of Present Detectors

Conveners: Nicolas Viaux (Pontificia Universidad Católica de Chile), Dr Nicolas Viaux Maira (Federico Santa Maria Technical University (CL))

2:30 PM The Precision Endcap Timing Layer of the CMS MIP Timing Detector for HL-LHC

To cope with the challenging environment of the High-Luminosity Large Hadron Collider (HL-LHC), the CMS Experiment is being upgraded to include the new MIP Timing Detector (MTD). The MTD is designed to mitigate pileup effects by providing a time measurement for charged particles with a resolution better than 50 ps. To achieve the necessary time precision, the Endcap Timing Layer (ETL), covering the pseudorapidity region 1.6 < η < 3, will utilize low gain avalanche diodes (LGADs), a novel silicon-based technology, read out by a custom-designed ASIC called ETROC. The ETL module exploits 16x16 pixels LGAD arrays that are bump-bonded to the corresponding ETROC ASICs. Over the past year, the first bump-bonded assemblies featuring ETROC2— the first full-size, fully functional prototype—were produced and tested in beam test campaigns at DESY and SPS. This presentation will provide an overview of the ETL design, focusing on module and sensor performance, and will present the project status and recent achievements.

Speaker: Ruben Lopez Ruiz (Universidad de Cantabria and CSIC (ES))

ICHEP26_ETL_RubenLopez.pdf

2:45 PM Design, Testing, Validation, and Construction of the CMS MTD Barrel Timing Layer

The new CMS MIP timing detector (MTD) for the Phase 2 upgrade is designed to measure the time-of-arrival of charged particles with a precision of 30-60 ps, to mitigate the effects of high pileup at HL-LHC. The central portion of MTD, the barrel timing layer (BTL), is made of about 166,000 scintillating LYSO:Ce crystal bars with readout using silicon photomultipliers on both ends and a dedicated readout ASIC (TOFHIR). To achieve the necessary timing resolution, sensor modules are uniformly cooled to -45°C using a combination of CO2 cold plates and thermoelectric coolers. Following its design optimization and successful performance validation through dedicated test beam campaigns, the BTL is now in the construction phase. The assembly of the BTL modules and their integration into trays is taking place at four BTL Assembly Centers worldwide, and the overall assembly will take place at CERN. Latest system tests have demonstrated the full functionality of the end-to-end acquisition chain with up to 4600 detector channels, using production versions of both front-end and back-end electronics. This presentation will provide an overview of the BTL key design features, recent system tests, and progress on assembly.

Speaker: Xiaohu Sun (Peking University (CN))

CMS-MTD BTL ICHEP2026 Xiaohu SUN.pdf

3:00 PM The ATLAS Forward Proton Time-of-Flight Detector System

The Time-of-Flight (ToF) detectors in the ATLAS Forward Proton (AFP) system are used to measure the primary vertex z-position of the pp -> pXp processes using the arrival times of the two intact final state protons. Detection efficiencies and timing resolutions using low, and moderate pile-up data collected are presented. While efficiencies of a few percent are observed in the Run 2, the resolutions of the two ToF detectors of 21 ps and 28 ps are measured. This corresponds to the expected precision of 5.3 ± 0.6 mm for the vertex reconstruction. The subsequent analysis confirms that the vertex position obtained with the ToF aligns with the value from the ATLAS central detector at the level of 6.0 ± 2.0 mm. During long shutdown 2, the ToF detector underwent major upgrades in electronics, optics, and mechanics, expected to provide a substantial improvement in detection efficiency. Preliminary results for efficiency and resolution studies based on Run 3 data taken will be presented.

Speaker: Mr Daniel Ernani Martins Neto (Krakow IFJ PAN)

AFP-Forward detector ToF detector-Daniel Ernani.pdf

3:15 PM CMS Precision Proton Spectrometer performance and HL-LHC plans

We present the results of the performance of PPS during Runs 2 and 3 and the plans for PPS2 in HL-LHC.

Speaker: Antonio Vilela Pereira (CBPF - Brazilian Center for Research in Physics (BR))

PPS-ICHEP2026-short-backup.pdf

PPS-ICHEP2026-short-backup.pptx

3:30 PM The ATLAS High-Granularity Timing Detector for the HL-LHC: project status and results

The HGTD is a novel detector introduced by ATLAS to augment the new all-silicon Inner Tracker (ITk) in the pseudorapidity range from 2.4 to 4.0, adding the capability to measure charged-particle trajectories in time as well as space. Two double-sided layers of silicon sensors will provide precision timing information for charged particles with resolution as good as 30 ps per track to help assign each particle to the correct vertex, recovering the ATLAS reconstruction performance at HL-LHC, enhancing the experiment’s pile-up rejection and providing bunch-by-bunch luminosity measurements. Readout cells have a size of 1.3 mm x 1.3 mm, leading to a highly granular detector with ~3.7 million channels. Low-Gain Avalanche Detectors (LGAD) technology has been chosen as it provides enough gain to reach the large signal over noise ratio needed. The requirements and overall specifications of the HGTD will be presented as well as the technical design and the project status. The R&D efforts on the detector components and construction, supported by laboratory and test beam results, will also be presented.

Speaker: Marco Lisboa Leite (Sao Paulo)

Leite_HGTD_ICHEP_2026_final.pdf

2:30 PM → 4:15 PM Quark and Lepton Flavor Physics

Conveners: Dmytro Kovalskyi (Massachusetts Inst. of Technology (US)), Melissa Maria Cruz Torres (CBPF - Brazilian Center for Physics Research (BR))

2:30 PM Measurements of $C\!P$ violation with charm hadrons at Belle and Belle II

The Belle and Belle II experiments have collected a $1.6~\mathrm{ab}^{-1}$ sample of $e^+e^-$ collision data at center-of-mass energies near the $\Upsilon(nS)$ resonances. These samples contain a large number of $e^+e^-\to c\bar{c}$ events that produce charmed mesons and baryons. Direct $C\!P$ violation is searched for in $D^0\to \pi^+\pi^-\pi^0$ decays and $D^+\to \pi^+\pi^0$ decays. We also present results on $C\!P$ violation in the charm baryon decays $\Xi^+_c\to \Sigma^+h^+ h^-$ and $\Lambda_c^+\to ph^+ h^-$.

Speaker: Jaeyoung Kim (BELLE (BELLE II Experiment) (Yonsei University))

2026_ICHEP_BelleII_CPviolation.pdf

2:45 PM Mixing and time-dependent CP violation in charm decays at LHCb

LHCb has collected the world's largest sample of charmed-hadron decays. This sample is used to measure the $D^0 -\overline{D}^0$ mixing and to search for $C\!P$ violation in the mixing, helping to shed light on the compatibility of the observation of $C\!P$ violation in $D^0 \to h^+ h^-$ decays. New measurements of several decay modes are presented, along with prospects for the sensitivity at the LHCb upgrades.

Speaker: Miguel Ruiz Diaz (Heidelberg University (DE))

Charm_mixing_CPV_MRuizDiaz.pdf

3:00 PM CP violation in the decay of charmed hadrons at LHCb

The LHCb experiment published the first observation of CP violation in the decay of charmed particles in 2019, using the decay channels $D^0 \to \pi^+\pi^-$ and $D^0 \to K^+K^-$. Measurements of other decay channels are essential to understand whether this observation can be explained within the Standard Model, or if new sources of CP violation are needed. We present the latest measurements of CP violation in charmed hadrons, including the first results based on Run 3 data.

Speaker: Francesco Zenesini (Universita e INFN, Bologna (IT))

ZENESINI_ICHEP2026.pdf

3:15 PM Charmed baryon decays at BESIII

BESIII has accumulated 4.5 $fb^{-1}$ of e+e- collision data in the 4.6 and 4.7 GeV energy range, which provide the largest dataset of $\Lambda_c^- \Lambda_c^+$ pairs in the world.
We will present a novel way for exploring CP violation using the $\Lambda_c^- \Lambda_c^+$ threshold data and the first observation of the transverse polarization of $\Lambda_c^+$ in the reaction $e^+e^-\to \Lambda_c^+ \Lambda_c^-$.
Furthermore, Our presentation will also include the observation of a rare beta decay of the charmed baryon $\Lambda_c^+ \to n e^+ \nu$ with a Graph Neural Network, recent results of the partial wave analysis of $\Lambda_c^+$, as well as the branching fraction measurements of the inclusive decays $\Lambda_c^+ \to X e^+ \nu$ and $\Lambda_c^- \to \bar{n} X$.

Speaker: Chengzhi He

ICHEP_charm_baryon.pdf

3:30 PM Optimal Dalitz-plot binning for measurements of CP violation in beauty and charm decays

Precision measurements of the CKM angle γ and of CP violation in charm mixing using model-independent analyses of $D \to K^0_S \pi^+ \pi^-$ decays rely critically on the choice of Dalitz-plot binning. Measurements of γ have, for more than a decade, used the same optimal binning scheme, while no dedicated optimisation has previously been performed for measurements of charm mixing observables.

In this work, we revisit the binning optimisation for γ measurements using a revised metric directly related to the statistical precision on γ. Other improvements are also implemented taking into account various realities of measurement such as backgrounds and systematic uncertainties that are sensitive to the binning scheme. Sensitivity studies show an improvement of approximately 5% in the expected precision on γ with $B^{\pm}\rightarrow DK^{\pm}$.

In addition, a new metric optimised for sensitivity to the CP violation in the interference and mixing of the $D \to K^0_S \pi^+ \pi^-$ decay is derived and used to obtain, for the first time, a dedicated optimal binning scheme for this measurement. Sensitivity studies demonstrate a substantial improvement of approximately 25% compared to the currently used equal-phase binning scheme.

Speaker: Marcelo Bovill (University of Oxford)

ICHEP_2026_Binning_Talk.pdf

3:45 PM Global CP asymmetries in charmless three-body B decays with final state interactions

We compare the predictions of a theoretical framework for the observable global charge-parity (CP) violation in charmless three-body $B^{\pm}$ decays with recent LHCb results. In this framework, the decay amplitudes consider the effects of the $\pi\pi \to K K$ rescattering treated within a CPT invariant framework together with the $U$-spin symmetry relation, $s \leftrightarrow d$, which results in $\pi \leftrightarrow K$ in the final state. This approach applied to a two-channel model provides the magnitudes and signs of the ratios of the global CP asymmetries for $B^{\pm} \to K^{\pm}\pi^{+}\pi^{-}$, $B^{\pm} \to K^{\pm}K^{+}K^{-}$, $B^{\pm} \to \pi^{\pm}K^{+}K^{-}$, and $B^{\pm} \to \pi^{\pm}\pi^{+}\pi^{-}$ decays, qualitatively consistent with those obtained from the available experimental data. In addition, by considering the neutral channels, we predict the ratios for the global CP asymmetries for these decays.

Speaker: Diego Torres Machado (Universidade do Estado do Rio de Janeiro)

ICHEP2026.pdf

2:30 PM → 4:15 PM Heavy Ions

Convener: Gabriel Denicol (Universidade Federal Fluminense)

2:30 PM Probing hypernucleosynthesis at the LHC with ALICE

Hypernuclei are bound states of nucleons and hyperons, expanding the nuclear chart to the strangeness dimension. The ALICE Collaboration has extensively studied the production of light (anti)hypernuclei across different colliding systems, providing constraints on hypernucleosynthesis models. In state-of-the-art coalescence models, hypernuclei emerge from nucleons and hyperons with overlapping wave functions, accounting for the size of the baryon-emitting source and the internal structure of the hypernucleus. Conversely, in statistical hadronization models, hypernuclei are treated similarly to other light-flavour hadrons. The accurate description of hypernuclei production implies more precise and differential measurements. In this contribution, the ALICE Collaboration presents recent hypernuclei measurements leveraging the data samples collected in the LHC Run 3. The first measurement of the hypertriton $p_{\mathrm{T}}$ spectrum in pp collisions is reported. This result, obtained with a dedicated offline software trigger, provides tight constraints on the modelling of the hypertriton wave function. Using the large samples collected with Pb beams, the first measurement of the azimuthal anisotropy of the hypertriton is obtained. In addition, searches for the bound $\Lambda\mathrm{nn}$ system are presented. These results provide novel insights on hypernuclear matter properties, as well as constraints on its formation mechanisms in the environment created in heavy-ion interactions.

Speaker: Maria Paula Martins Palhares (Universidade de Sao Paulo (USP) (BR))

Probing_hypernucleosynthesis_ALICE_ICHEP_2026_MPMP.pdf

3:00 PM Monte Carlo studies of collective effects in small collision systems

Measurements of azimuthal correlations revealed an unexpected collective behaviour in small collision systems similar to the one exhibited by the quark-gluon plasma in heavy-ion collisions. In this talk, the origin of collectivity in small collision systems, which is still not understood, is addressed by confronting different tunes of PYTHIA8, Herwig, and EPOS4 event generators using measurements of azimuthal correlations for inclusive and identified particles. In particular, anisotropic flow coefficients measured using two- and four-particle cumulants with various pseudorapidity gaps and balance functions are reported in different multiplicity classes of pp collisions at $\sqrt{s} = 13.6$ TeV and p-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV. The results are compared with the available experimental data providing a quantitative Monte Carlo baseline for interpreting flow measurements in small collision systems.

Speaker: Maria Linc (Institute of Space Science subsidiary of INFLPR (RO))

Monte_Carlo_studies_of_collective_effects_in_small_collision_systems.pdf

3:15 PM Hydrodynamics in small systems and relativistic statistical mechanics

We review the evidence of the applicability of hydrodynamics in small systems and argue that it poses a challenge to the microscopic theories from which hydrodynamics in heavy ion collisions is usually derived.
We then argue that Gibbsian statistical mechanics, together with local Lorentz symmetry, could yield to a formulation of fluctuating hydrodynamics whose applicability is not constrained by usual requirements of many degrees of freedom and molecular chaos.
The applicability of hydrodynamics is then related to the applicability of the statistical model, which is also apparent even in e-e collisions.
Extensions of this theory to spin hydrodynamics, diffusion and curved spacetimes are discussed.
Based on
https://inspirehep.net/literature/2915269

Speaker: Giorgio Torrieri

ichep.pdf

3:30 PM Barnett effect in heavy-ion collisions: A new source of magnetic field

Non-central relativistic heavy-ion collisions generate extreme angular velocities leading to significant global vorticity. While the magnetic field from spectator protons has been extensively studied, the magnetization induced by the coupling between spin and rotation, classically known as the Barnett effect, has remained unexplored in the context of quantum chromodynamic matter. Here, we present the first theoretical investigation of Barnett magnetization in the hot, dense hadronic phase produced in heavy-ion collisions. Using a rotating hadron resonance gas model, we compute the Barnett magnetization $M_{\text{Barnett}}$ as a function of temperature $T$, baryochemical potential $\mu_B$, and angular velocity $\omega$. We demonstrate that $M_{\text{Barnett}}$ increases monotonically with all three parameters, leading to an induced magnetic field $B_{\text{ind}}$ that is comparable to the external magnetic field $B_{\text{ext}}$ at low center-of-mass energies ($\sqrt{s_{\text{NN}}} < 20$~GeV). This result establishes the Barnett effect as a previously overlooked but significant source of magnetization in heavy-ion collisions. It provides an explanation for the observed splitting between $\Lambda$ and $\bar{\Lambda}$ hyperon polarizations ($P_\Lambda < P_{\bar{\Lambda}}$), stemming from their opposite magnetic moments. Our findings suggest that Barnett-induced fields may dominate the spin dynamics at kinetic freeze-out, offering a new perspective on the interplay between rotation, magnetization, and spin transport in QCD matter.

Speaker: Dushmanta Sahu (Universidad Nacional Autonoma (MX))

Dushmanta-ICHEP-Magnetomechanical.pdf

3:45 PM Searching for the QCD critical point with relativistic viscous hydrodynamics

With the STAR's Beam Energy Scan II, a rich amount of data exist to search for the QCD critical point. However, a central challenge is that the critical point cannot be directly extracted from data but rather is probed dynamically in an expanding, cooling system that may be far-from-equilibrium. In this talk, I will show the latest results from equations of state with a movable critical point generated by the MUSES collaboration, ran in the 3+1D relativistic viscous hydrodynamics code CCAKE. We can quantify the interplay between beam energy, location of the critical point, and rapidity range. We have find that for our most reasonable choice in the location of the critical point ($\mu_B$=600 MeV) that effects already appear as high as $\sqrt{s}=39$ GeV but at large forward/backward rapidity (approximatley 40% of fluid cells pass near the critical point). In contrast, at low $\sqrt{s}=7.7$ GeV only up to 20% of fluid cells pass near the critical point at mid-rapidity.

Speaker: Prof. Jacquelyn Noronha-Hostler (University of Illinois Urbana Champaign)

NoronhaHostler_ICHEP26.pdf

2:30 PM → 4:15 PM Detectors for Future Facilities, R&D and Novel Techniques (including Quantum Sensors)

Conveners: Deywis Moreno Lopez (Universidad Antonio Narino (CO)), Ginger Cheng (Nikhef National institute for subatomic physics (NL))

2:30 PM DRD Calo – Introduction and scientific highlights

The international collaboration DRD Calo, hosted by CERN, bundles the strategic R&D for calorimeter systems for future experiments in particle physics. It was founded in 2024 and currently comprises 134 institutes from 27 countries. This contribution will introduce the collaboration and its research programme and summarise the highlights of the first two years since its foundation. These include beam test results with novel optical materials exploiting dual readout techniques combined with excellent energy resolutions. Furthermore, the collaboration develops innovative imaging calorimeters featuring high-level integration based on semi-conductors, multi-pattern gas detectors and scintillating tiles. Noble Liquid calorimeters plan for next-generation calorimeters with a tenfold increase in granularity compared with today’s devices. This requires a careful layout of readout electrodes and front-end electronics, whose operation in cryogenic environment is considered. The core work of the collaboration is supported with state-of-the-art electronics and photosensors and benefits from consolidated software and computing framework. The detector development will make strong use of artificial intelligence and corresponding groups are an integral part of the collaboration. The presentation will close with an outlook on the next approval period 2027-2029.

Speaker: Brieuc Francois (CERN)

DRDCalo_ICHEP_2026_Brieuc_Francois.pdf

2:45 PM R&D Studies of Noble Liquid Calorimetry for FCC-ee

Noble liquid electromagnetic calorimetry is a strong candidate for high-precision detectors at future lepton colliders, including Higgs factories, due to its excellent energy resolution, response uniformity, and potential for fine spatial segmentation.

Within the Detector R&D Collaboration for Calorimeters (DRDCalo), key elements of a noble liquid calorimeter are being developed, addressing both readout and mechanical design. High-granularity readout is achieved using straight, multilayer electrode structures. Laboratory measurements with PCB prototypes demonstrate the feasibility of this readout concept and show good agreement with detailed simulations, supporting its compatibility with modern reconstruction techniques, including particle-flow algorithms and machine-learning-based approaches.

Mechanical R&D focuses on the design of absorber plates, support structures, and spacers. Laboratory tests with absorber prototypes provide input for simulation studies, while detailed simulations are performed to assess mechanical stability and guide design choices. These studies inform the overall detector layout and preparations for a future beam-test prototype.

This technology is being adopted in the ALLEGRO detector concept for FCC-ee, where noble liquid electromagnetic calorimetry is foreseen for both the barrel and endcap regions. Its integration within the key4hep software framework and expected performance are presented.

Speaker: Brieuc Francois (CERN)

20260730_ALLEGRO_ECAL_Brieuc_Francois_ICHEP2026.pdf

3:00 PM Towards chromatic calorimetry using nanocomposite scintillators

The development of advanced detector technologies will play a key role in the success of next-generation high-energy physics experiments, such as the FCC-ee. In this context, recent advances in quantum-engineered scintillating materials open new opportunities for innovative detector designs. One such concept is chromatic calorimetry, an approach to homogeneous electromagnetic calorimetry that reconciles detector homogeneity with longitudinal segmentation of particle showers.

The first part of this contribution presents the experimental validation of a proof-of-concept chromatic calorimeter. The detector is based on standard scintillating materials emitting in distinct wavelength ranges, combined with a spectrally dependent readout system that enables the separation of scintillation signals from different regions of the calorimeter. Results on shower profile reconstruction, energy calibration, and energy resolution are discussed, demonstrating the potential of this approach for precision electromagnetic calorimetry.

The second part presents prospects for implementing chromatic calorimetry using nanocomposite scintillators, consisting of quantum dots embedded in a polymer matrix. These materials are particularly promising due to their narrow, tunable emission spectra and their exceptionally fast timing capabilities. The current status in the production of nanocomposites based on cesium lead halide is reviewed, and their scintillation properties are discussed in view of future applications in calorimetry.

Speaker: Anne-Mazarine Lyon (CERN)

26_07_30_ICHEP26_chromatic_calorimetry_AMLyon.pdf

3:15 PM Measurement of the performance of a partly instrumented highly compact and granular electromagnetic calorimeter in an electron beam of 1 to 6 GeV

Highly compact and granular electromagnetic calorimeters are required for precision measurements in luminometers at e$^+$e$^-$ colliders and for the determination of positron multiplicity and energy spectra in the laser–electron scattering experiment LUXE, which probes strong-field QED. In luminometer applications, where Bhabha scattering serves as the reference process, a compact calorimeter with a small Molière radius enables a precise definition of the fiducial volume, reduces the required space, and improves the separation of high-energy electromagnetic showers from low-energy background. In laser–electron scattering, the wide dynamic range of secondary particles makes a compact calorimeter suitable for both counting and energy measurement. A sandwich-type calorimeter has been designed and partially constructed, consisting of tungsten absorber plates interleaved with thin silicon sensor planes separated by 1.2 mm gaps. Each sensor plane uses a 90x90 mm² silicon pad sensor with a 16×16 matrix, flexible Kapton circuits, and a carbon-fiber support, with a total thickness of less than 1 mm. The readout employs FLAME ASICs integrating analogue electronics and 10-bit ADCs. A prototype with up to 11 layers was tested with 1–6 GeV electron beams at DESY-II. Preliminary results on energy, position, and angular resolution, the Molière radius, and longitudinal shower development are presented.

Speaker: Dawid Pietruch (AGH University of Krakow)

Dawid_Pietruch_ICHEP_2026_ECALp.pdf

3:30 PM CyberPFA: Particle Flow Algorithm for Crystal Bar ECAL

Precision measurements of Higgs and electroweak bosons at future lepton colliders (e.g., CEPC) demand unprecedented jet energy resolution. To achieve this, The CEPC reference detector employs an innovative long crystal bar electromagnetic calorimeter (ECAL) designed for Particle Flow. While offering superior energy and space resolution, this design introduces unique reconstruction challenges: significant shower overlaps due to the intrinsic material properties, and ghost hits (ambiguity) arising from the perpendicular bar arrangement.

In this talk, we present CyberPFA, a novel particle flow algorithm tailored for these scenarios. CyberPFA utilizes an energy-core-based pattern recognition strategy to disentangle overlapping showers and a suite of optimized algorithms to resolve ghost-hits. Evaluated with full detector simulation, CyberPFA achieves a 3.8% boson mass resolution for $H\to gg$ events, successfully surpassing the 4% physics requirement for CEPC. Furthermore, the algorithm's excellent two-photon separation power reaches the ECAL's granularity limit, enabling high-efficiency $\pi^{0}$ reconstruction that benefits flavor physics studies.

These results validate the long crystal bar ECAL as a viable design choice for future colliders and highlight the advanced nature of the energy-core-based reconstruction paradigm. The innovative approach of CyberPFA is not only effective for the current design but also offers potential for generalization to other high-granularity imaging calorimeters.

Speaker: Yang Zhang (Institute of High Energy Physics, Chinese Academy of Science)

20260730_ICHEP_CyberPFA.pdf

2:30 PM → 4:15 PM Artificial Intelligence, Machine Learning and Quantum Computing in HEP

Convener: Manuel Szewc (UNSAM)

2:30 PM Multi-Dimensional Integration with Quantum Adaptive Importance Sampling

Perturbative Quantum Field Theory is central for performing precise predictions of observables at high-energy colliders. Fundamental concepts in this framework, such as Loop Feynman diagrams and the phase-space, require evaluating multidimensional integrals. The standard approach relies on adaptive importance sampling, notably the VEGAS algorithm, which updates a multidimensional grid. Because the cost of handling each grid cell grows exponentially with the integral's dimensions, the Probability Density Function (PDF) model is simplified to a separable product of PDFs, factorized along each integration variable's axis.

We present a hybrid quantum-classical algorithm that performs Quantum Adaptive Importance Sampling (QAIS). By using the exponentially sized Hilbert space of a Parameterized Quantum Circuit (PQC), we manipulate the PDF over the grid in its entirety. With adequate expressivity and entanglement, we capture correlations among integrand variables, bypassing the separable PDF assumption. By optimizing the PQC, we adapt and load a PDF that approximates the integrand's behavior. Direct sampling allocates samples into important regions, enabling accurate integral estimation. We test QAIS on benchmark integrals and Loop Feynman integrals, comparing against VEGAS's proposal PDF at fixed sample sizes.

References

K. Pyretzidis, J.J. Martínez de Lejarza, G. Rodrigo, Unlocking Multi-Dimensional Integration with Quantum Adaptive Importance Sampling, e-Print: 2506.19965 [quant-ph]

Speaker: Konstantinos Pyretzidis (IFIC ( UV-CSIC ))

ICHEP_2026_Pyretzidis.pdf

2:45 PM Learning the latent structure of background distributions

Monte Carlo simulations provide powerful approximations to experimental data when accurate modeling and parameter tuning are available. However, it is unrealistic to expect that a single parameterization can reproduce the full complexity of the data. A more plausible assumption is that different simulation setups describe different regions of observable space with varying degrees of accuracy.

In this work, I present an application of Latent Dirichlet Allocation (LDA) that exploits information from multiple simulation setups of known processes to learn the shapes of observable distributions directly from data. This approach provides a general framework to infer the latent topic structure underlying the observed data, which permits flexible and data-driven background modeling and uncertainty estimation.

I demonstrate this method in a specific application to multijet final states at collider experiments.

Speaker: Santiago Andres Tanco

main.pdf

main.pdf

3:00 PM EveNet: A Foundation Model for Particle Collision Data Analysis

While deep learning is transforming data analysis in high-energy physics, computational challenges limit its potential. We address these challenges in the context of collider physics by introducing EveNet, an event-level foundation model pretrained on 500 million simulated collision events using a hybrid objective of self-supervised learning and physics-informed supervision. By leveraging a shared particle-cloud representation, EveNet outperforms state-of-the-art baselines across diverse tasks, including searches for heavy resonances and exotic Higgs decays, and demonstrates exceptional data efficiency in low-statistics regimes. Crucially, we validate the transferability of the model to experimental data by rediscovering the $\Upsilon$ meson in CMS Open Data and show its capacity for precision physics through the robust extraction of quantum correlation observables stable against systematic uncertainties. These results indicate that EveNet can successfully encode the fundamental physical structure of particle interactions, which offers a unified and resource-efficient framework to accelerate discovery at current and future colliders.

Speaker: Yulei Zhang (University of Washington (US))

EveNet_ICHEP

3:15 PM JetParticle-JEPA : An efficient Self-Supervised Representation Learning Method for Jet Tagging

The search for new physics at the Large Hadron Collider (LHC) increasingly depends on the ability to extract tiny signals from petabytes of data. Machine learning (ML) methods have become essential tools for identifying jets and the particles that initiated them, as well as for separating rare physics processes from background events.
In recent years, self-supervised learning (SSL) has been explored for jet classification, particularly due to its ability to leverage large amounts of unlabeled data. This approach is appealing because on model can replace training many single-task models with supervised learning.

In this work, we introduce JP-JEPA, a novel framework based on joint embedding predictive architectures (JEPA). Our approach aims to predict a latent representation associated with an enriched view of the data from a partial observation. Built upon the state-of-the-art Particle Transformer (ParT), our method captures fine-grained correlations among jet constituents without requiring explicit supervision.

Using the JetClass open dataset, we demonstrate state-of-the-art performance compared to supervised methods. Additionally, we propose and validated a feature-level masking strategy tailored to missing information and other experimental effects. Our results demonstrate that a competitive pre-trained foundation model can be built for downstream applications in Particle Physics.

Speaker: Antonin VACHERET (LPC Caen)

JP-JEPAICHEP26-Vacheret.pdf

3:30 PM PanopTag: Simultaneously Tagging All Jets in a Particle Collision Event

Jet tagging, identifying the origin of jets produced in particle collisions, is a critical classification task in high-energy physics. Despite the revolutionary impact of deep learning on jet tagging over the past decade, the paradigm has remained unchanged. In particular, jets are classified independently, one at a time. This single-jet approach ignores correlations, overlaps, and wider event context between jets. We introduce \textsc{PanopTag}, a new paradigm for jet tagging that departs from traditional single-jet tagging approaches. Rather than classifying jets independently, \textsc{PanopTag} simultaneously tags all jets by employing an encoder-decoder architecture that uses jet kinematics as queries to cross-attend to particle flow object embeddings. We evaluate \textsc{PanopTag} on heavy-flavor $(b/c)$-tagging and demonstrate remarkable performance improvements over state-of-the-art single-jet baselines that are only accessible by exploiting event-level features and correlations between jets.

Speaker: Brendon Bullard (SLAC National Accelerator Laboratory (US))

FTAG_Algo_PanopTag-4.pdf

3:45 PM Deep Learning Methods for Jet Tagging and Process Classification Using Image Processing

Jets are important structures observed in high-energy physics for its wide range of uses, including investigations of electro-weak interactions and Beyond the Standard Model physics, among several other applicabilities. Likewise, in recent years the use of neural networks and other machine learning and artifficial intelligence (AI) methods in high-energy physics has rapidly expanded because of its great versatility. One of the known studies that serves as a intersection between the two subjects is the use of neural networks in jet tagging applications. This study explores a convolutional neural network (CNN) based approach to classify events produced in high-energy collisions by differentiating between events with the presence of heavy quark (charm, bottom), light quark (up, down, strange), and gluon jets, with the main characteristic being that jets are not reconstructed in our approach. The method constructs image-like representations based on the kinematics of charged decay products using detector-level variables, which allow CNNs to identify visual patterns characteristic of each jet type. This approach not only demonstrate strong classification performance, highlighting the versatility of CNN architectures in jet tagging, but also reveals the abillity of AI methods to observe jet structures and differentiate between them even in the absence of jet reconstruction.

Speaker: Jhoão Gabriel Martins Campos de Almeida Arneiro (Universidade de São Paulo (USP) (BR))

ICHEP_2026_reference.pdf

ICHEP_2026_talk.pdf

4:00 PM A Hyperparameter Optimization Framework for Preparing ML Models for Real-Time Trigger Deployment

Machine learning models used in real-time and resource-constrained environments, such as hardware triggers, online reconstruction pipelines, and FPGA/GPU inference systems, must satisfy strict latency, memory, and numerical precision requirements. Achieving these targets typically requires extensive tuning of training schedules, quantization settings, sparsity levels, and architectural parameters. In current workflows, this optimization process is often manual and difficult to reproduce, especially when multiple objectives must be balanced simultaneously.
To address this challenge, we introduce a new hyperparameter optimisation platform within the PQuantML library, developed as part of the Next-Generation Trigger project. The platform provides an integrated framework for automated exploration of compression parameters and fine-tuning strategies, built on Optuna for adaptive sampling and MLflow for experiment tracking. Users define search spaces and evaluation metrics through configuration files, enabling large-scale optimisation experiments without modifying model code. We demonstrate the framework on representative convolutional and classifier models used in real-time ML studies, showing how automated optimisation systematically identifies the best configurations that meet HL-LHC latency and resource budgets while maintaining high physics performance. This integrated platform capability strengthens PQuantML as a toolchain for preparing deployable ML models and provides a reproducible workflow for tuning models designed for the NGT and online computing systems.

Speaker: Anna Polova (UNESP - Universidade Estadual Paulista (BR))

ICHEP2026_Anastasiia_PETROVYCH.pdf (3).pdf

4:15 PM → 4:45 PM Coffee break

4:45 PM → 6:30 PM Neutrino Physics

Conveners: Arman Esmaili (PUC-Rio), J. Pedro Ochoa (Berkeley Lab)

4:45 PM Track events at IceCube from the decay of heavy particles

Track events at the IceCube Observatory are characterized by an energetic muon crossing several kilometers before decaying. Such muons are dominantly produced in charged current muon neutrino-hadron interactions. However, muons are also produced through the $W^{\pm}$-boson production and in the decay of tau leptons and heavy mesons created in neutral and charged current interactions induced by all neutrino flavors. In this study, we investigate the contribution of these subleading channels to events characterized as tracks at the IceCube. Our results indicate that these channels correspond to a non-negligible fraction of the High Energy Start Events classified as track. In addition, we show that their contributions are concentrated in muons that are less energetic than those arising from muonic neutrino charged current interactions for the same visible energies of the process. Finally, we investigate the impact of these additional channels on the description of the astrophysical neutrino flux, and we find that the inclusion of these subleading processes is important in determining the parameters of the astrophysical neutrino flux.

Speaker: Reinaldo Francener (Universidade Estadual de Campinas)

TracksIceCube_ICHEP.pdf

5:00 PM Core-Collapse Supernova monitoring system at JUNO

The Jiangmen Underground Neutrino Observatory (JUNO) is a 20-kiloton liquid scintillator detector with the capability to detect neutrinos from the next Core-Collapse Supernova (CCSN) and effectively manage the resulting large statistics. The real-time CCSN monitoring system of JUNO is designed to provide fast and reliable alerts by tracking the increasing event rates of supernova burst neutrinos and pre-supernova
neutrinos. The system comprises a prompt monitor at the CTU stage, an online monitor at the DAQ stage, and a multi-messenger monitor based on low-threshold triggers, ensuring second-level alert generation while maintaining full coverage of the Milky Way, with a false alert rate kept below one per month. Upon detecting an alert, the system will record as much data as possible for rapid analysis, facilitating multi
messenger observations of CCSN events. The monitoring system is officially online and connected to SNEWS 2.0. This talk will discuss the implementation and current operational status of the CCSN monitoring system, as well as evaluate its alert performance through simulations.

Speaker: YIXUAN JIANG (The Institute of High Energy Physics of the Chinese Academy of Sciences)

260730-ichep.pdf

5:15 PM Investigating astrophysical neutrinos with the DUNE experiment

The Deep Underground Neutrino Experiment (DUNE) is a next-generation long-baseline neutrino experiment designed to address key open questions in neutrino physics, including the determination of the neutrino mass ordering and the discovery of leptonic Charge-Parity (CP) violation. In addition to its accelerator-based program, DUNE features a rich non-beam physics program enabled by its underground location at the Sanford Underground Research Facility.

DUNE will consist of four LArTPC (Liquid Argon Time Projection Chamber) far detectors, with a total mass of about 70 kt, providing excellent sensitivity to astrophysical neutrinos in the MeV energy range. In particular, DUNE offers unique sensitivity to electron neutrinos via charged-current interactions on argon, making it especially well-suited for the detection of neutrinos from a galactic core-collapse supernova. Moreover, the elastic-scattering channel will provide pointing capabilities, with the resolution currently projected to be on the order of a few degrees, which is key to identifying the progenitor for multi-messenger follow-up. DUNE will also detect solar neutrinos, providing sensitivity to the $~^{8}$B flux and a potential measurement of the hep component.

Speaker: Diana Navas-Nicolás (CIEMAT)

ICHEP2026_DUNE_astrophysical_neutrinos_Navas.pdf

5:30 PM Neutrino oscillations and decoherence in astrophysical environments

A number of current and future neutrino experiments are devoted to the detection of astrophysical neutrinos. Neutrino interactions with dense matter and strong magnetic fields peculiar to astrophysical environments, such as supernova explosions, are expected to cause considerable effects in the neutrino flavour evolution. One of the interesting effects is damping of the neutrino oscillations due to the neutrino wave packets separation. We develop the wave packet description of neutrino oscillations in astrophysical environments. It is shown that the damping of neutrino helicity transitions caused by their interactions with a magnetic field can occur during supernova explosions. We emphasize the difference between Dirac and Majorana neutrinos. CP-violating effects are also considered.

Based on:
[1] A.Popov, A.Studenikin, “High-energy neutrinos flavor composition as a probe of neutrino magnetic moments”, Phys.Rev.D 111 (2025) 12, 123001.
[2] A.Popov, A.Studenikin, “Manifestations of nonzero Majorana CP-violating phases in oscillations of supernova neutrinos”, Phys.Rev.D 103 (2021) 11, 115027.

Speaker: Artem Popov (Moscow State University)

Popov_ICHEP_2026.pdf

5:45 PM The influence of a fluctuating ALPs field on the neutrino quantum decoherence

The evolution of neutrinos in the presence of a stochastic classical axion-like particle (ALP) background is analyzed. The Redfield equation for the neutrino density matrix is derived, and the corresponding dissipative matrix is obtained. Using existing bounds on the decoherence parameter determined from reactor neutrino experiment data, estimates on the ALP-neutrino coupling constants are established. Furthermore, prospective constraints on the neutrino-ALP interaction are derived by utilizing the projected sensitivity of the DUNE experiment.

[1] A. Lichkunov, K. Stankevich, A. Studenikin, "Neutrino quantum decoherence in a fluctuating ALPs field", Phys. Rev. D 112, 123007
[2] A. Lichkunov, A. Popov, A. Studenikin, "Three-flavor neutrino oscillations in a magnetic field", Int. J. of Mod. Phys. A, Vol. 41, No. 02, 2650015 (2026)
[3] C. Ternes, G. Pagliaroli, F. Villante, "SN1987A bounds on neutrino quantum decoherence", Phys.Rev.D 112 (2025) 6, 063058

Speaker: Alexey Lichkunov (Lomonosov Moscow State University)

Lichkunov_43_ICHEP.pdf

6:00 PM Search for ultra-high energy neutrinos at the Pierre Auger Observatory

The Pierre Auger Observatory, while primarily designed to detect ultra-high-energy cosmic rays (UHECRs), possesses a high sensitivity to neutrinos with energies exceeding 100 PeV. By identifying the unique characteristics of highly inclined air showers, i.e., those with zenith angles above 60 degrees, the Observatory efficiently detects neutrinos of all flavors. This presentation reviews the current status of neutrino searches at Auger Observatory. The establishment of stringent upper limits on the neutrino flux from both diffuse and point-like sources has placed significant constraints on EeV-energy neutrino production models and the fundamental properties of UHECR sources. Furthermore, the Observatory has achieved high sensitivity in searches for transient events. Finally, we address the search for upward-going air showers, motivated by the "anomalous" radio pulses reported by the ANITA experiment. Based on the significantly larger exposure to upward-going showers at the Auger Observatory, the non-observation of such events severely constrains the upward-going shower explanation of the ANITA events for showers originating from known particle decays or interactions.

Speaker: Dariusz Gora (Institute of Nuclear Physics PAN)

Natal-Brazil-final.pdf

6:15 PM Leptonic production of high-energy neutrinos in ultra-high-energy electromagnetic cascades: microphysics, and the MUNHECA public code

High-energy neutrinos are often regarded as a robust signature of hadronic activity in astrophysical sources. However, at sufficiently high energies, purely leptonic electromagnetic (EM) cascades initiated by photons or $e^\pm$ can convert a non-negligible fraction of injected EM power into neutrinos through muon/pion-producing QED processes. In this talk I will present a unified and quantitative treatment of this “leptonic neutrino” channel in two complementary settings: (i) ultra-high-energy photon injection in the high-redshift Universe, where interactions with the CMB dominate, and (ii) EM cascades developing inside astrophysical sources with dense target photon fields.

We quantify the relative importance of the relevant $\gamma\gamma$ and $e\gamma$ interaction channels at ultra-high energies, and show how their competition governs cascade development and imprints characteristic features on the resulting leptonic neutrino spectrum.

I will introduce MUNHECA, a public Monte Carlo python3 code that models the full cascade microphysics across configurable target photon backgrounds and interaction channels, enabling reproducible predictions for the emergent neutrino spectra in cosmological and source environments.

While focused on neutrino phenomenology, the same cascade physics is applicable to both conventional astrophysical emitters and exotic ultra-high-energy injection scenarios, linking neutrino astronomy to broader ICHEP topics in astroparticles.

Speaker: Dr AmirFarzan Esmaeili (Universidade Estadual de Campinas (UNICAMP))

0726_ICHEP_Amir.pdf

4:45 PM → 6:30 PM Dark Matter

Convener: Sukanya Sinha (The University of Manchester (GB))

4:45 PM The Search for Dark Photons at the Short- Baseline Near Detector

A plethora of astronomical and cosmological observations have provided strong evidence for the existence of dark matter. In recent years, light dark-sector particles -- such as dark photons -- have gained significant attention as candidates for physics beyond the Standard Model. These particles arise in well-motivated extensions involving a hidden U(1) gauge symmetry and can couple to Standard Model particles through kinetic mixing. This work investigates the production of these dark-sector states at the Booster Neutrino Beam, when the 8 GeV protons hit a beryllium target and the downstream dump. We explore how neutral mesons like π0 and η generate dark photons via two-body decays, as well as through bremsstrahlung radiation from protons. We also investigate their detection at the Short-Baseline Near Detector (SBND), a 112-ton liquid argon time projection chamber, situated 110 meters away from the target. In this work, we focus on detecting dark photons through electron-positron pair decay channels. We investigate both the potential for various analysis and reconstruction tools to be employed in a dark photon search, and how they contribute to an enhanced sensitivity.

Speaker: Rohan Sudarshan Rajagopalan

RohanR_ICHEP2026.pdf

5:00 PM Searching for Visibly Decaying Dark Photons with the DarkSHINE Experiment

DarkSHINE is a proposed fixed-target experiment designed to search for light dark matter candidates using the high-energy electron beam from the Shanghai High-Intensity Linear Accelerator (SHINE) facility. This talk focuses on the search for dark photons (A′) in the visible decay mode, A′ →e+e-, utilizing displaced-vertex reconstruction to suppress background. We present a comprehensive study based on full Geant4 simulations and an end-to-end reconstruction chain extending from raw hits to tracks and vertices. A key highlight is the implementation of a Graph Neural Network (GNN)-based track-finding approach, which improves tracking efficiency by approximately 50% compared to traditional methods. This advancement translates into a ~1.5 times gain in overall signal efficiency. We provide updated signal sensitivity estimates in the (mA′,ϵ) parameter space, demonstrating that DarkSHINE can reach previously unexplored regions, particularly around ϵ∼10−4 and mA′∼50 MeV. Our results underscore DarkSHINE's potential to significantly extend the reach of dark sector searches in the coming years.

Speaker: Zejia Lu (Shanghai Jiao Tong University (CN))

DarkSHINE_ICHEP2026_Zejia_Lu.pdf

5:15 PM Probing Dark Sectors with Muon Beams: New Results from NA64

As a proof of principle, the NA64 experiment has performed the first search for dark sectors using the CERN SPS M2 high-energy muon beam and a missing energy-momentum technique [1,2]. An analysis of 160 GeV/𝑐 muons on target observed no events in the signal region, setting leading constraints on muon-philic Z′ mediators, including the L_μ−L_τ scenario relevant for the muon (g−2)_μ anomaly, and excluding part of the parameter space motivated by thermal dark matter.

Building on this demonstration, NA64 has since accumulated a dataset with approximately 20 times higher statistics. The corresponding analysis is nearing completion and will substantially improve the sensitivity to a wide range of dark-sector models. In this talk, we will present these new results for the first time. We will also discuss the prospects for a next-generation muon-beam experiment, the MuNLight project, a proposed upgrade planned to operate after LS3. By exploiting high-energy muon beams, MuNLight would probe a complementary region of parameter space, with discovery potential extending up to two orders of magnitude beyond current limits.

[1] NA64 Collaboration, Phys. Rev. Lett. 132, 211803 (2024)
[2] NA64 Collaboration, Phys. Rev. D 110, 112015 (2024)

Speakers: Laura Molina Bueno (Univ. of Valencia and CSIC (ES)), Paolo Crivelli (ETH Zurich (CH))

CrivelliMolina_ICHEP2026_30072026.pdf

5:30 PM Charge-Exchange Reactions as a Sensitive Probe of Invisible η and η' Decays at the NA64h experiment

Invisible decays of the pseudoscalar neutral mesons ($M^{0}$) provide a window to probe new physics beyond the Standard Model. Searching for $M^{0}$ decays into invisible final states requires a combination of an intense source of neutral mesons and a well-defined, high-purity experimental signature to identify their production. This talk presents the first results from the NA64h experiment on searches for invisible decays of $\eta$ and $\eta'$ mesons produced via charge-exchange reactions of $\pi^-$ on nuclei. No significant excess over the expected background is observed, and upper limits at 90% confidence level are set. A stringent limit is placed on the branching ratio $\mathrm{BR}(\eta' \to \mathrm{invisible}) < 2.1\times10^{-4}$ improving the previous bound by a factor of ≃3. We also set a limit on $\mathrm{BR}(\eta \to \mathrm{invisible}) < 1.1\times10^{-4}$ comparable with the existing constraint. These results have been published in Physical Review Letters.

Speaker: Marco Ayala (SAPHIR - UNAB)

MAyala_ICHEP.pdf

5:45 PM DarkSide-LowMass: A Low-Threshold Dual-Phase Argon TPC for Low-Mass Dark Matter Searches

Dark matter candidates with masses below 10 GeV/$c^{2}$ remain highly motivated and experimentally accessible. The DarkSide-50 detector, a dual-phase argon time projection chamber with a 46 kg active target, has achieved world-leading constraints using an ionization-only analysis. Building on this achievement, DarkSide-LowMass, a dedicated tonne-scale low-threshold dual-phase argon TPC optimized for electron-counting measurements—has been proposed, with CJPL as a candidate laboratory for operation. Sensitivity studies for light dark matter are performed over a range of analysis thresholds and background assumptions. The results indicate that DarkSide-LowMass can reach the solar-neutrino “fog” for GeV-scale masses, while retaining significant sensitivity down to $\mathcal{O}(10~\mathrm{MeV}/c^{2})$ when considering Migdal-induced signals and dark matter–electron interactions. Requirements to maximize performance will also be discussed, including the potential for further threshold reduction via xenon doping, improved signal and background modeling, etc.

Speaker: Prof. Yi Wang (Institute of High Energy Physics, Chinese Academy of Sciences)

DS-LM YW2.pdf

4:45 PM → 6:30 PM Education & Outreach

Convener: Marcelo Gameiro Munhoz (Universidade de Sao Paulo (USP) (BR))

4:45 PM International Masterclasses in Particle Physics - From colliders to medical applications

The flagship activity of the International Particle Physics Outreach Group (IPPOG) is the International Masterclasses (IMC) in particle physics. This very successful programme brings cutting-edge science to high-school students, making them scientists for a day. Invited to a university or laboratory, the students spend a day of immersion in particle physics, learning about the standard model and beyond, about experimental methods, detectors and accelerators. The hands-on part of the activity involves analysis of real data from an experiment, followed by discussion of the results. A videoconference at the end of the day with groups from other countries gives them the opportunity to discuss further, ask questions to scientists acting as moderators and participate in a quiz. The data used for the hands-on part were initially from LEP experiments; with the turn-on of the LHC, measurements based on data from ALICE, ATLAS, CMS and LHCb were introduced. In the last years there has been a spectacular broadening of the physics content of the masterclasses, with data from BELLE II at KEK, from neutrino experiments (MINERvA, NOvA at Fermilab), from astroparticle physics (the Pierre Auger Observatory) and medical applications of our field.

Speaker: Yiota Foka (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))

ICHEP2026-IMC-updated29july2026.pdf

ICHEP2026-IMC-updated29july2026.pptx

5:00 PM Social Media Strategy for the Deep Underground Neutrino Experiment

The Deep Underground Neutrino Experiment (DUNE) is an international experiment consisting of over 1500 members, 38 countries, and 222 institutions including CERN. Its scale and diversity offer new opportunities for engaging the public with both frontier science and the people who carry it out. We present DUNE’s social media strategy for communicating the experiment through a series of targeted campaigns. “From Clean Rooms to Caves” connects individual detector components to DUNE’s broader physics goals. “Early Career Researchers” highlights the contributions and perspectives of early career members of the collaboration. “Global Voices of DUNE” uses portraits and personal reflections to showcase the diversity and shared passion of the DUNE community. Engagement metrics from 2025 are presented as a benchmark for assessing impact and guiding communication strategy in 2026.

Speaker: Thomas Murphy (Fermi National Accelerator Laboratory)

Social Media Strategy for the Deep Underground Neutrino Experiment.pdf

5:15 PM Overview of outreach efforts for the LHCb experiment

The LHCb experiment at CERN seeks to answer one of the biggest mysteries of our Universe: why is our Universe dominated by matter, rather than antimatter? The pursuit for the answer to this fundamental question inspires members of the scientific community, but also members of the public, policy makers and funding agencies. This talk will highlight the efforts of the LHCb community in publicising our results and their significance to our diverse audiences through various channels. These activities include a strong social media presence and our public webpage, participating in international masterclasses, development of our merchandise, and organising tours of our experiment and exhibits for visits from the public, VIPs and funders.

Speaker: Giulia Frau (The University of Manchester (GB))

OutreachLHCb_ICHEP_GiuliaFrau.pdf

5:30 PM Upgrading the "Cosmic Piano" with DarkSide-20k SiPMs

The "Cosmic Piano" is a modular detector that transforms cosmic ray muons into audiovisual signals, serving as a powerful tool for particle physics outreach. We present a major hardware upgrade replacing the standard Avalanche Photodiodes (APDs) with Silicon Photomultipliers (SiPMs) derived from the DarkSide-20k experiment, a global effort searching for WIMP dark matter using a massive two-phase Liquid Argon TPC at LNGS.
Adapting these specialized sensors for educational use requires the development of new front-end electronics and a custom Data Acquisition (DAQ) system. This updated readout architecture is designed to manage the signal processing for five independent scintillator modules, preserving the original instrument's capability to generate distinct musical notes for each cosmic ray impact. By integrating this specific technology, we not only improve the detector's Photon Detection Efficiency (PDE) but also create a direct pedagogical link, allowing students to interact with the state-of-the-art photosensors currently used in frontier underground physics.

Speaker: Hector David Regules Medel (Autonomous University of Puebla (MX))

CosmicPiano_APDs.mp4

Cosmic_Piano_ICHEP_2026.pdf

5:45 PM A report on the application of project-based flipped learning on a scientific computing course to physics undergraduates

Scientific computing constitutes the third pillar of modern physics, yet effectively integrating it into the undergraduate curriculum remains a pedagogical challenge, especially in Brazil. Historically, Brazilian students view programming as a challenge to overcome rather than a skill to develop. Moreover, the recent emergence of AI programmers allows students to lean on these tools, purposely avoiding competence development. This report details the implementation of a Project-Based Flipped Learning (PBFL) methodology in a scientific computing course at the University of Campinas. By shifting theoretical instruction to asynchronous study, classroom time was dedicated to collaborative, open-ended projects covering hardware architecture, code optimization, and simulation. An examination of student feedback (N=24) reveals a substantial enhancement in self-reported conceptual comprehension and programming confidence. While the flipped component ensured the acquisition of technical foundations, the project-based element fostered high student engagement through autonomy. Although time management emerged as a logistical constraint, we conclude that the PBFL model effectively bridges the gap between abstract programming syntax and practical physical application while allocating AI to its proper use without compromising the students' development.

Speakers: Gustavo Do Amaral Valdiviesso (Instituto de Fisica (IFUSP)-Universidade de Sao Paulo-Unknown), Gustavo Do Amaral Valdiviesso (Universidade Federal de Alfenas)

PBFL_ScientificComputingPhysics_GAValdiviesso.pdf

6:00 PM The Italian Summer Students Program at Fermilab and other US Laboratories

Since 1983 the Italian groups collaborating with Fermilab (US) have been running a 2-month summer training program for Master students. While in 1983 the program involved only 4 physics students, in the following years it was extended to engineering students. Many students have extended their collaboration with Fermilab with their Master Thesis and PhD.
The program has involved almost 650 students from more than 20 Italian universities. Each intern is supervised by a Fermilab Mentor. Training programs spanned from Tevatron, CMS, Muon (g-2), Mu2e and SBN and DUNE design and data analysis, development detectors and software for tera-data handling, quantum computing and research on superconductive elements and accelerating cavities.
In 2015 the University of Pisa included the program within its own educational programs. Summer Students are enrolled at the University of Pisa for the duration of the internship and at the end they write reports. After positive evaluation by a University of Pisa Examining Board, interns are acknowledged 6 ECTS credits for their Diploma Supplement. In 2020-2021 the program was canceled due to the sanitary emergency but in 2022 it was restarted and in 2022-2025 it trained more than 70 students. We are now organising the 2026 program.

Speaker: Promita Roy (Centre for Neutrino Physics, Virginia tech)

Ichep2026_outreach_Promita.pdf

4:45 PM → 6:30 PM New Developments in Quantum Field Theory, String Theory and Quantum Information in HEP

Convener: Andrea Guerrieri

5:00 PM Bounds on pion-nucleon scattering from the S-matrix bootstrap

We study the scattering of scalar and fermion particles in four-dimensional quantum field theories, with and without global symmetries. We construct non-perturbative bounds on this process using the S-matrix bootstrap. In the presence of SO(3) symmetry, we interpret our results as bounds on observables in pion–nucleon scattering. In particular, we derive bounds on the residues of poles associated with nucleon exchange.

Speaker: Prof. Denis Karateev (Universite de Geneve (CH))

pion-Nucleon_scattering.pdf

5:15 PM Probing Lambda-Lambda-Gravity with Bose-Einstein Condensate

We present a novel tabletop approach to testing fundamental gravitational physics using quantum phononic excitations in a trapped Bose-Einstein condensate (BEC). The setup exploits the unique sensitivity of a BEC to the two leading contributions to the gravitational potential in $\Lambda$-gravity, namely the Newtonian $GM/r$ term and the cosmological constant contribution $\Lambda r^2$, which together form the most general static potential consistent with Gurzadyan's theorem.

The gravitational signal is induced by an oscillating source mass, generating controlled fluctuations of the gravitational potential that couple to collective phonon modes of the condensate. The sensitivity of the detector can be enhanced by approximately two orders of magnitude through a tritter operation, which coherently mixes phononic excitations with the BEC ground state and constitutes a genuine quantum-information element of the measurement strategy.

Using state-of-the-art experimental parameters, we show that this setup allows for precision measurements of the gravitational constant $G$ well beyond current tabletop experiments, while simultaneously providing the strongest laboratory-based constraints on the cosmological constant $\Lambda$. In addition, the distance dependence of the measured signal enables direct tests of modified gravity scenarios within a fully controlled quantum system.

Based on arXiv:2409.19755 [Phys.Rev.Res. 7 (2025) 4, L042051]

Speaker: Prof. Alexander Belyaev (University of Southampton & Rutherford Appleton Laboratory)

Belyaev_BEC-ICHEP2026.pdf

5:30 PM Structure of cosmic strings for a gauged B-L symmetry

It is an unnatural feature of the Standard Model that the
difference between the baryon number B and the lepton number L
is conserved, which implies an exact, global symmetry.
We turn it into a naturally exact, local symmetry by coupling
the quantum number B-L to an Abelian gauge field.
Gauge anomalies are cancelled by adding right-handed neutrinos
nu_R, which are not sterile.
This forbids the Majorana term, but we arrange for a
nu_R-mass by adding a Higgs-type 1-component complex scalar
field. Thus we arrive at a modest but well-motivated
Standard Model extension.

We investigate the field equations in the corresponding extended
gauge-Higgs sector, involving both Higgs fields and the non-standard
U(1) gauge field. This leads to a set of coupled, non-linear
differential equations, which we solve numerically, focusing on
the structures of cosmic strings. For a large variety of parameters,
we identify the string profiles and energy densities.
These profiles depend on the winding number of each of the Higgs
fields. As an amazing peculiarity, we discover - for high winding
numbers - "overshooting" and "co-axial" solutions; in the latter
case, the profile of the standard Higgs field changes its sign
near the core of the cosmic string.

Speaker: Wolfgang Bietenholz

cosmicstring.pdf

6:15 PM The Static Heavy Quark-Antiquark Potential within String Theory in Arbitrary Stationary Backgrounds

We analyze the dynamics of a static open string in a general stationary spacetime, which can represent a heavy quark-antiquark pair within the holographic framework or effective theory. We establish that for a simple U-shaped string with only radial dependence on the space string coordinate, the string profile is generally not symmetric about its turning point, and the symmetry restores only for backgrounds with $G_{00} G_{pr} - G_{0p} G_{0r} = 0$. Consequently, such asymmetric strings directly probe a possibility of the parity violation in the quark-antiquark interaction. Nevertheless, we identify a wide family of metrics for which the symmetry is preserved, enabling a direct isolation of the linear-in-distance term in the static interquark potential for simple symmetric string configurations, even in non-diagonal backgrounds. Applying the holographic framework, we further study the Rindler-AdS spacetime dual to an accelerated $\mathcal{N}=4$ super Yang-Mills plasma.
We show that the distance between quarks decreases, the static potential between them increases, and the deconfinement phase transition temperature increases with an acceleration $a$. However, we show that an acceleration-scaled potential, $aV$, as a function of the acceleration-scaled distance, $aL$, does not depend on the certain value of the acceleration.

Speaker: Nikita Tsegelnik (BLTP, JINR)

Tsegelnik-static-potential.pdf

4:45 PM → 6:30 PM Strong Interactions and Hadron Physics

Convener: Liu Beijiang

4:45 PM Di-jet acoplanarity as a function of flattenicity in pp collisions at $\sqrt{s}=13$ TeV

One of the most important discoveries at the LHC is the presence of effects associated with quark–gluon plasma (QGP) formation in proton–proton (pp) collisions. The origin of these observations remains unknown. Since event selection in many studies relies on multiplicity-based estimators known to introduce selection biases, alternative approaches must be explored to elucidate the origin of these phenomena.

This talk presents a comparison between event classifiers used in LHC experiments, aiming to assess their mutual compatibility. Results for pp collisions at $\sqrt{s}=13$ TeV simulated with PYTHIA 8 indicate the presence of biases introduced by classifiers, which can obscure any evidence of the formation of QGP in small systems. However, these biases are significantly reduced or absent in events triggered with flattenicity. This finding motivates the application of flattenicity in di-jet acoplanarity analysis used to search for jet quenching effects. While the multiplicity-based estimators produce an azimuthal broadening in high-multiplicity compared to minimum-bias pp collisions, even in PYTHIA 8 that does not incorporate jet quenching, the results as a function of flattenicity are fully consistent with minimum-bias pp collisions, suggesting that this novel tool could be exploited by experiments at the LHC to refine the jet quenching searches in small systems.

Speaker: Jesus Eduardo Munoz Mendez (Universidad Nacional Autonoma (MX))

Acoplanarity_ICHEP.pdf

5:00 PM Status and Outlook of Multi-Parton Interaction Measurements with CMS

Multi-Parton Interactions (MPI) are a key component in the description of proton–proton collisions at high energies, providing important contributions to the underlying event and to the simultaneous production of multiple hard final states. This contribution presents an overview of the main CMS results related to MPI studies, with a focus on processes sensitive to Double Parton Scattering (DPS) and higher-order partonic interactions. In particular, DPS constitutes an important background to Higgs boson production and measurements. Measurements involving quarkonium and jet final states are discussed, including multiple J/ψ production, such as double J/ψ at 7 TeV and triple J/ψ at 13 TeV, as well as mixed heavy-flavor channels like J/ψ+D*. Results from purely hadronic and electroweak final states, including four-jet production, W+2 jets, and WW production, are also presented, covering different center-of-mass energies and kinematic regimes. The extracted values of the effective cross section​ are compared across different channels and collision energies, allowing tests of its universality and investigations of possible dependencies on the hard scale, process type, and event topology. Finally, prospects for MPI studies at CMS are discussed, including expected improvements with Run 3 and HL-LHC data and their impact on the tuning of phenomenological models and event generators.

Speaker: Eduardo Alves Coelho (CBPF - Brazilian Center for Physics Research (BR))

ICHEP_Eduardo_Status_DPS_CMS_v5 (1).pdf

5:15 PM Measurements of soft QCD and double parton interaction processes in ATLAS

Measurement of soft QCD and DPI processes at the LHC offers a key means to test QCD at small energy scales and investigate proton structures in depth. In addition, these measurements are important to constrain hadronic models, which has profound impact on physics studies extending to cosmic ray fields. This talk will present the recent measurements in this sector from ATLAS and discuss the physics impact and prospects.

Speaker: Aram Apyan (Brandeis University (US))

apyan_ichep26.pdf

5:30 PM Constraining light (anti)nuclei formation via deuteron-proton angular correlations in pp collisions with ALICE

The production mechanism of light (anti)nuclei in hadronic collisions is a central topic in high-energy nuclear physics. Experimental measurements have been described using either the statistical hadronisation model or the coalescence approach, in which nuclei form from baryons close in phase space at kinetic freeze-out. Recent ALICE measurements provide strong evidence that coalescence-driven mechanisms dominate light-nuclei formation in small colliding systems at LHC energies. These results shift the focus toward a quantitative understanding of the underlying coalescence dynamics and their dependence on the local phase-space structure of baryons. New observables are essential to constrain the microscopic properties of the nucleon emission phase space.

Angular correlations between particle pairs provide a sensitive probe of particle production mechanisms. In proton-proton collisions, the ALICE Collaboration observed an unexpected near-side anticorrelation for baryon-baryon pairs that is not reproduced by Monte Carlo event generators.

In this contribution, light nuclei production is investigated for the first time via nuclei-proton angular correlations. New measurements of deuteron-proton correlations in Run 3 pp collisions are presented and compared to state-of-the-art simulations, providing novel constraints on the microscopic mechanisms underlying light (anti)nuclei formation.

Speaker: Nicolò Jacazio (Universita del Piemonte Orientale (IT))

nj_Nuclei_Correlation_ICHEP26.pdf

4:45 PM → 6:30 PM Beyond the Standard Model

Convener: Helena Brandao Malbouisson (Universidade do Estado do Rio de Janeiro (BR))

4:45 PM ATLAS searches for new low-mass BSM resonances

The discovery of the Higgs boson with the mass of about 125 GeV completed the particle content predicted by the Standard Model. Even though this model is well established and consistent with many measurements, it is not capable to solely explain some observations. Many extensions of the Standard Model addressing such shortcomings introduce additional neutral bosons. The current status of searches for low mass resonant signatures from the ATLAS experiment is presented.

Speaker: Jean Yves Beaucamp (National University of La Plata (AR))

Slides.pdf

5:00 PM Searches for heavy resonances decaying to multiple bosons in CMS

A summary of searches for heavy resonances decaying into pairs of bosons is presented, performed on data collected with the CMS detector. The heavy resonance may be a new scalar that decays to two scalars, including the SM Higgs boson, or a new vector boson that decays to two SM bosons (W, Z, or Higgs). A frequent feature of these analyses is a boosted topology, namely the decay products of the heavy resonance are expected to be highly energetic and close in angle.

Speaker: Sahithi Rudrabhatla

Searches for heavy resonances decaying to multiple bosons in CMS.pdf

5:15 PM Searches for Exotic Heavy Resonances with the ATLAS detector

Many extensions of the Standard Model predict new heavy particles that could appear as resonances decaying into quarks, leptons or photons. Using 13 and 13.6 TeV pp collision data from the LHC, ATLAS explores these signatures, including boosted regimes where high-momentum final states pose unique reconstruction and background estimation challenges. This talk presents recent results and their implications for new physics at the TeV scale.

Speaker: Ewan Hill (University of Toronto (CA))

EwanHill_2026_08_July_30__exoticHeavyResonancesATLAS__ICHEP_Natal__v202607300036.pdf

5:30 PM Scalar sector and dark matter phenomenology in a novel two-loop scotogenic model

I will describe an extended $3+1$ Higgs doublet model where the Standard Model (SM) gauge structure is enhanced by the discrete symmetry $Q_6 \times Z_2 \times Z_4$, and the fermion content is extended with right-handed Majorana neutrinos. The scalar sector, besides four $SU(2)$ doublets, incorporates multiple gauge-singlet scalars. In our model, the tiny active neutrino masses arise from a novel radiative seesaw mechanism at two-loop level and the leptonic mixing features the cobimaximal mixing pattern compatible with neutrino oscillation experimental data. Along with this, the proposed model is consistent with SM quark masses and mixings as well as with the constraints arising from dark matter relic density and dark matter direct detection. Our analysis reveals that the best-fit point satisfying dark matter constraints yields a non-SM scalar with mass near $95$ GeV, which could be a possible candidate for the observed $95$ GeV diphoton excess. We further obtain other non SM scalars with masses at the subTeV scale which are within the LHC reach, while successfully complying with the experimental bounds arising from collider searches.

Speaker: Antonio Enrique Cárcamo Hernández (Universidad Técnica Federico Santa María)

TalkACarcamoNovel2loopModelICHEP2026.pdf

5:45 PM Searches for New Resonances with CMS

The quest for new physics is a major aspect of the CMS experimental program. This includes models involving resonances that can decay to photons, leptons or jets. This talk presents an overview of such analyses with an emphasis on new results and the novel techniques developed by the CMS collaboration to boost the search sensitivity. The searches are carried out with data of the Run-II and Run-III of the LHC in proton-proton collisions with the CMS detector.

Speaker: Paul Devouge (Université Paris-Saclay (FR))

ICHEP2026_New_Resonances_Devouge.pdf

6:00 PM Dark matter and lepton sector phenomenology of a radiative inverse seesaw model

We propose a Standard Model (SM) extension where neutrinos get masses through a two-loop inverse seesaw mechanism. This naturally explains the smallness of the neutrino masses and allows seesaw mediators to be at the TeV scale with testable phenomenology. The model adds two real singlet scalars and four electrically neutral leptons to the SM. The extension considers the existence of two global Abelian symmetries, a continuous $U(1)$ and a discrete $Z_3$. The latter, remains unbroken after spontaneous symmetry breaking and forbids tree-level and one-loop neutrino masses, and stabilizes the dark matter (DM) candidates. This setup accommodates neutrino-oscillation data, yields two pseudo-Dirac heavy pairs with small active–sterile mixing, and predicts an effective Majorana mass $m_{ee}$ in the $2.1$–$4.4~\mathrm{meV}$ range for normal ordering. Charged-lepton flavor violation is naturally suppressed yet testable: for a representative benchmark we obtain $\mathrm{BR}(\mu\!\to\!e\gamma)\simeq 1.6\times 10^{-14}$, with correlated signals in $\mu\!\to\! eee$ and $\mu$–$e$ conversion within next-generation experimental reach. Altogether, the radiative origin of neutrino masses links low-energy flavor observables to collider signatures, delineating discovery targets for MEG~II, Mu2e/COMET, and the HL-LHC and distinguishing this framework from conventional inverse- and radiative-seesaw models.

Speaker: Rocío Branada Balbontín (Universidad Técnica Federico Santa María)

Lepton_sector_and_dark_matter_phenomenology_of_a_minimal_two_loop_level_inverse_seesaw_model (1).pdf

6:15 PM Extended IDM theory with low scale seesaw mechanisms

We have developed an extension of the inert doublet model in which the CP-phases in the weak sector are generated from one-loop level corrections mediated by dark fields, while the strong-CP phase remain vanishing at three-loop. In this framework, the tiny masses of the active neutrinos are produced through a radiative inverse seesaw mechanism at a two-loop level, the masses of the first and second families of SM-charged fermions arise from a one-loop level radiative seesaw mechanism, and the third generation of SM charged fermion masses are generated at tree level. We have demonstrated that the proposed model successfully accounts for SM fermion masses and mixings. The preserved discrete symmetries also allow for multi-component dark matter, whose annihilation processes permits to successfully reproduce the measured amount of dark matter relic abundance for an appropriate region of parameter space, which has shown to be compatible with current dark matter direct detection limits. Besides that, we explore the model’s ability to explain the 95 GeV diphoton excess observed by the CMS collaboration, showing that it readily accommodates this anomaly. We have shown that charged lepton flavor violating decays acquire rates within the current experimental sensitivity.

Speaker: Dr Nicolás A Pérez-Julve (Universidad Técnica Federico Santa María)

Extended_IDM_with_low_scale_seesaw_mechanism.pdf

4:45 PM → 6:30 PM Operation, Performance and Upgrade of Present Detectors

Conveners: Dmitrii Dementev (JINR LHEP), Dmitrii Dementev (JINR)

4:45 PM Commissioning of the Mu2e Electromagnetic Calorimeter

The Mu2e electromagnetic calorimeter consists of two annular aluminum disks, each instrumented with undoped CsI crystals and read out by large-area arrays of silicon photomultipliers (SiPMs). The detector has been fully assembled and installed in the Mu2e experimental hall. The complete system—including photosensors, front-end and digital electronics, cooling, slow control, and data acquisition—was successfully commissioned during the assembly phase in a clean-room environment. Preliminary time and energy calibrations were obtained using cosmic-ray events and laser pulses. In this paper, we report the performance achieved in these preliminary tests and present the strategy for the final commissioning of the two disks in the Mu2e experimental hall.

Speaker: Luca Morescalchi (Universita & INFN Pisa (IT))

MU2EEMC-ICHEP2026_v3.pdf

5:00 PM Towards understanding the response of a liquid scintillator detector: JUNO as an example

Liquid scintillator detectors have been widely used in reactor anti-neutrino measurements for over seven decades, since the first detection of neutrinos. Jiangmen Underground Neutrino Observatory (JUNO), the largest liquid scintillator detector ever built, started its physics data-taking in Aug. 2025, aiming to address key questions in neutrino physics such as neutrino mass ordering, precision measurement of neutrino oscillation parameters, etc. Understanding the detector response of JUNO is a prerequisite for data analyses. This involves modeling the light generation and propagation in the 20-kton liquid scintillator, the optical and charge responses of the 17,612 20-inch and 25,600 3-inch photomultiplier tubes (PMTs), as well as the energy non-linearity and resolution, among others. Aided by the sophisticated calibration systems, JUNO deployed various radioactive and laser sources into the detector. Combined with natural radioactive backgrounds and cosmogenic isotopes, JUNO demonstrates a light yield of 1785 PE/MeV using neutron capture events at the detector center, an energy scale uncertainty better than 0.5%, an energy non-linearity uncertainty within 1%, and an energy resolution of 3.4% for the Ge-68 calibration source. This talk summarizes the extensive efforts undertaken towards understanding the JUNO detector, and presents the corresponding response models and results.

Speaker: Mr Yaoguang WANG (Shandong University)

ICHEP2026-talk.pdf

5:15 PM Operation and Performance of the ATLAS Liquid Argon Calorimeter during LHC Run 3

The ATLAS Liquid Argon (LAr) calorimeter system provides electromagnetic calorimetry for |η| < 3.2 and hadronic and forward calorimetry up to |η| = 4.9. Together with the Tile Calorimeter, it is essential for the reconstruction and triggering of electrons, photons, jets, and missing transverse momentum. During LHC Run 3, from 2022 to 2026, the LAr calorimeter operated under increased luminosity and pileup conditions, reaching up to about 65 interactions per bunch crossing.
A robust operational model combining detector hardware, calibration systems, high-voltage and cryogenic infrastructure, online monitoring, and dedicated software workflows ensured excellent performance and reliability. Data-taking efficiencies above 99.9% were achieved, with stable response and high data quality throughout the run. A major evolution during Run 3 was the successful commissioning and sustained operation of the fully digital trigger readout, providing increased trigger-level granularity and enabling the progressive retirement of the legacy analog trigger. In parallel, the precision readout chain benefited from the refurbishment and reliable operation of more than 1,500 legacy boards.
This contribution reviews the Run 3 operational experience and lessons learned in preparation for Run 4 and the High-Luminosity LHC era.

Speaker: Grigore Tarna (CERN)

ATLAS_LArCalo_OperationsStatusRun3_ICHEP2026.pdf

5:30 PM The ATLAS Tile Calorimeter: performance, calibration and optics robustness

The Tile Calorimeter (TileCal) is a sampling hadronic calorimeter covering the central region of the ATLAS experiment, with steel as absorber and plastic scintillators as active medium. The scintillators are read-out by the wavelength shifting fibres coupled to the photomultiplier tubes (PMTs). The analogue signals from the PMTs are amplified, shaped, digitized by sampling the signal every 25 ns and stored on detector until a trigger decision is received. The TileCal front-end electronics reads out the signals produced by about 10000 channels measuring energies ranging from about 30 MeV to about 2 TeV. Each stage of the signal production from scintillation light to the signal reconstruction is monitored and calibrated. The calorimeter time resolution has been studied with multi-jet events. High-momentum isolated muons have been used to study and validate the electromagnetic scale, while hadronic response has been probed with isolated hadrons. This contribution will present recent performance results, including the calibration and optics robustness.

Speaker: Danijela Bogavac (Barcelona)

ICHEP2026_DBogavac.pdf

5:45 PM Performance of the CMS Electromagnetic Calorimeter in Run3

The electromagnetic calorimeter (ECAL) of the CMS experiment at LHC plays has a crucial role in various physics analyses, spanning from Higgs measurements to the exploration of new physics phenomena. Achieving optimal resolution for electron and photon energy measurements, as well as accurately assessing the electromagnetic component of jets and quantify missing transverse energy, necessitates precise calibration of the detector and its individual channels. To maintain stable energy response over time, a laser monitoring system is utilized to detect radiation-induced alterations in the detector, compensating for them at the reconstruction stage. Moreover, each channel undergoes in-situ calibration using physics events (W and Z electrons, photons from low mass resonance decays). This contribution will describe the methodologies employed for ECAL energy and new time calibration algorithms used by CMS; in addition the new automated system designed to streamline calibration workflows during data taking will be introduced. Finally we'll present the ECAL performance during LHC Run3.

Speaker: Patricia Rebello Teles (Brazilian Center for Physics Research - CBPF (BR))

ICHEP_ECAL_performance_final.pdf

6:00 PM Tuning the Energy Reconstruction algorithm of ATLAS Tile Calorimeter

The Optimal Filter (OF2) algorithm is used for energy reconstruction by the ATLAS Tile Calorimeter (TileCal). This standard energy reconstruction method assumes uncorrelated noise. However, in the challenging high pile-up conditions of the LHC Run 3, the time correlations of the pile-up noise become important. The optimized Optimal Filtering algorithm (OF2 COV) is developed to enhance energy reconstruction in TileCal. The optimized method incorporates a noise covariance matrix into the calculation of the filter weights to effectively model and mitigate this correlated noise. Performance studies, conducted at both the cell and readout channel levels, demonstrate a significant improvement in the energy resolution. In regions of high occupancy and under moderate pile-up conditions, the root mean square of the energy error is reduced by up to 25% compared to the standard OF2 method. Further study of the new noise constants, essential for the reconstruction of physics objects, confirmed the overall reduction in noise across the calorimeter,

Speaker: Gustavo Libotte (UERJ)

ATL-COM-TILECAL-2026-052.pdf

6:15 PM Detector Physics and Calibrations in MicroBooNE

The MicroBooNE detector is the longest continually-running liquid argon time projection chamber (LArTPC) in history. It operated for six years at Fermilab, accumulating neutrino data from both the Booster and NuMI beams. This data has enabled a rich and successful physics program, built on a detailed understanding of the physics influencing the detector’s performance and its response to both charge and light signals. This talk will showcase MicroBooNE’s operations history and summarize its many pioneering contributions to LArTPC calibration methods. It will also highlight more recent advances including the evaluation of the performance of a TPC-based triggering scheme, investigations into light yield and photoelectron rates, and novel calibration methods at MeV-scale energies. These methods open the door to a wide array of future LArTPC physics analyses, and establish a foundation for calibration strategies in next-generation LArTPC experiments, including SBND and DUNE.

Speaker: Will Foreman (Los Alamos National Laboratory (US))

ICHEP_DPG_July2026.pdf

4:45 PM → 6:30 PM Quark and Lepton Flavor Physics

Conveners: Dmytro Kovalskyi (Massachusetts Inst. of Technology (US)), Melissa Maria Cruz Torres (CBPF - Brazilian Center for Physics Research (BR))

4:45 PM CP violation in charmless decays of B mesons

Charmless decays of B mesons provide a sensitive probe of direct CP violation and hadronic dynamics through the interference of amplitudes with different weak and strong phases. Using data collected by the LHCb experiment, the latest measurements of charmless B decays are presented, including precision measurements of CP asymmetries and branching fractions in multibody final states. These results improve our understanding of flavour physics in hadronic B decays and provide stringent tests of the Standard Model description of CP violation.

Speaker: Irina Nasteva (Federal University of Rio de Janeiro (BR))

Talk_CPV_charmless_LHCb-ICHEP2026.pdf

5:00 PM Amplitude analyses of charmless B decays at LHCb

Charmless decays of B mesons provide a sensitive probe of direct CP violation and searches for new physics effects. In multibody decays, short and long-distance dynamics along with a sizeable effective weak phase in the interference between tree and penguin amplitudes can lead to a rich structure of resonances and signatures of CP violation as a function of the phase space. Using data collected by the LHCb experiment, this talk presents the amplitude analyses of three-body charmless B decays to charged hadrons. The precision measurements of the dynamics of CP asymmetries in the decay phase space improve our understanding of strong-interaction effects in hadronic B decays and provide stringent tests of the Standard Model.

Speaker: Fernando Luiz Ferreira Rodrigues (Federal University of Rio de Janeiro (BR))

ichep2026_FernandoRodriguess.pdf

5:15 PM Final State-interaction as a mechanism to explain CP violation in $B^\pm \to K^\pm \pi^+\pi^- $

In a recent work, we used the universality of pion--pion ($\pi\pi$) final-state interactions at small invariant masses to understand the enhanced localized CP violation in $B^\pm\to K^\pm\pi^+\pi^-$, using a dispersive approach. We used LHCb public data for integrated CP-asymmetry to fix coupling constants, and we successfully predict the Dalitz-plot kinematic distribution of the asymmetry in $\pi\pi$ mass below 1 GeV. I will show the relevance of P- and S-wave interferences, and in particular, the essential role played by the contributions of isospin 2.

Speaker: Patricia Magalhaes (UNICAMP)

ICHEP_bkpipi_2026.pdf

5:30 PM Measurements of $C\!P$ violation in penguin $B$ decays at Belle II

The Belle II experiment has collected a 500 fb$^{-1}$ sample of $e^+e^-\to B\bar{B}$ decays at a center-of-mass energy corresponding to the $\Upsilon(4S)$ resonance. The asymmetric-energy SuperKEKB collider provides a boost to the $B$ mesons in the laboratory frame, allowing measurements of time-dependent $C\!P$ violation. We present measurements of time-dependent $C\!P$ violation in both hadronic and radiative penguin $B$ decays, including measurements of the $C\!P$ asymmetries in $B\to \eta' K^0$, and the radiative decays $B\to \rho^0\gamma$ and $B\to K^0 \pi^0 \gamma$.

Speaker: Shubhangi Maurya (Charles University, Prague)

ICHEP.pdf

5:45 PM Measurements of $C\!P$ violation in $B\to\pi^0\pi^0$ decay at Belle II

The Belle II experiment has collected a 500 fb$^{-1}$ sample of $e^+e^-\to B\bar{B}$ decays at a center-of-mass energy corresponding to the $\Upsilon(4S)$ resonance. The asymmetric-energy SuperKEKB collider provides a boost to the $B$ mesons in the laboratory frame, allowing measurements of time-dependent $C\!P$ violation. We present a measurement of the time-dependent $C\!P$ asymmetry in $B^0\to \pi^0\pi^0$ decays, which uses a novel method that exploits the quantum-entanglement of the two $B$ mesons and Belle II's high-precision pixel detector. The measurement provides unprecedented sensitivity to the least known angle of the unitarity triangle $\alpha$.

Speaker: Diego Tonelli (INFN Trieste, Italy)

DTonelli-ICHEP.pdf

6:00 PM Measurements of hadronic $B$ decay rates at Belle and Belle II

The Belle and Belle II experiments have collected a $1.2~\mathrm{ab}^{-1}$ sample of $e^+ e^-\to B\bar{B}$ collisions at a center-of-mass energy corresponding to the $\Upsilon(4S)$. The study of hadronic $B$ decays in these data allows the precise measurement of absolute branching fractions and angular distributions of the decay products. We present an amplitude analysis of three-body charmless decays $B\to K\pi\pi$ that provide the inputs to a sum rule in the $B\to K^*\pi$ system, analogous to the one in the $B\to K\pi$ system related to the so-called ``$K\pi$ puzzle''. We present a search for the decay $B\to K^+K^-\pi$. We present the observation of the decays $B^+\to \Sigma_c(2455)^{++} \Xi_c^-$ and $B^0\to \Sigma_c(2455)^0 \Xi_c^0$ and searches for the decays $B^+\to \Sigma_c(2455)^{++} \Xi_c^{-'}$ and $B^0\to \Sigma_c(2455)^0 \Xi_c^{0'}$, and the inclusive decay $B\to \Omega_c X$. We also present a search for the decays $B\to D^{(*)}\eta\pi$. These decays are related to $B\to D^{(*)}\eta\ell\nu$ decays, which could contribute to the gap modes in semileptonic $B$ decays.

Speaker: Shu-Ping Lin (INFN Padova)

ichep_bhadronic_belle2.pdf

6:15 PM Theoretical uncertainties in Golden Modes and in Nonleptonic B Decays

Nonleptonic B decays play a key role in the determination of the CKM parameters and in the search for New Physics (NP). Measurements of time-dependent CP asymmetries in the so-called Golden Modes are continuously improved, calling for a robust estimate of the theoretical uncertainties in the extraction of the CKM angles $\beta$ and $\beta_s$. A solid estimate of theory uncertainties is also crucial to assess the possible presence of NP in penguin-dominated B decays to light mesons. We present results of global fits of $B_{u,d,s} \to J/\Psi P$, $B_{u,d,s} \to J/\Psi V$, $B_{u,d,s} \to D_{(s)}\bar{D}_{(s)}$ and $B_{u,d,s} \to PP$, $PV$ and $VV$, with $P$ ($V$) a light pseudoscalar (vector), taking into account all contributions to the decay amplitudes and estimating SU(3)-breaking effects in a conservative way.

Speakers: CHIARA GIULIANO - (Universidad de Granada), Luca Silvestrini (INFN, Rome)

slides_ichep_chiara_giuliano.pdf

4:45 PM → 6:30 PM Heavy Ions

Convener: Prof. Jacquelyn Noronha-Hostler (University of Illinois Urbana Champaign)

4:45 PM Shock Waves and Emergence in Matter under Extreme Conditions: From Heavy Ions to Astrophysics

Shock waves are sharp, non-linear discontinuities in pressure, density, and temperature that form when a disturbance propagates supersonically relative to the medium. They arise both in relativistic heavy-ion collisions and in high-energy astrophysical environments such as core-collapse supernovae and binary neutron star mergers. Despite the enormous separation in spatial and temporal scales, these systems are governed by the same relativistic conservation laws and admit a unified description within relativistic fluid dynamics.

In heavy-ion collisions, shock-like phenomena emerge during early compression and jet–medium interactions in the strongly coupled quark–gluon plasma, while in astrophysics shocks are typically sustained structures shaped by gravity, radiation, and magnetic fields. Differences in the equation of state, transport properties, and boundary conditions determine the specific realisation of shocks, while the underlying dynamics remain universal.

This contribution uses shock waves as a comparative probe within a unified relativistic fluid-dynamical framework to study emergent behaviour in relativistic matter across laboratory and astrophysical scales.

Speaker: Azwinndini Muronga

ICHEP2026-HIC-Muronga-orig copy.pdf

5:00 PM Modelling stochastic fluctuations in relativistic kinetic theory

Lately, experimental results suggest that collective behavior, usually associated with hydrodynamics, emerges also in, e.g., ultra-relativistic proton-nuclei collisions. Since these systems involve a smaller number of particles than nucleus-nucleus collisions, thermal fluctuations are expected to be more significant. Given that current hydrodynamic
and non-equilibrium dynamics models usually do not take these fluctuations into account, this motivates the development of formulations of stochastic dynamics compatible with the principles of relativity. In this talk, we present a theoretical framework [1] for relativistic fluctuating kinetic theory based on the information current formalism [2] in which consistency with Lorentz-covariance, causality and stability are guaranteed. We assess violations to Boltzmann’s molecular chaos postulate for systems with few particles; verify that transient hydrodynamics comprises at least 80% of the equilibrium fluctuations of the stress-energy tensor at a given time for ultra-relativistic gases and compute the correlators at non-equal times for two selected collision kernels.

[1] G. S. Rocha, L. Gavassino, N. Mullins. Phys.Rev.D 110 1, 016020 (2024)
[2] L. Gavassino, M. Antonelli, B. Haskell. Phys. Rev. Lett. 128, 010606 (2022)

Speaker: Gabriel Soares Rocha (Universidade Federal Fluminense)

Apres-ICHEP_GSR_30-07-26_17h00_--.pdf

5:15 PM Second-Order Relativistic Magnetohydrodynamics from the Boltzmann–Vlasov Equation

Strong magnetic fields generated in non-central ultrarelativistic heavy-ion collisions can potentially modify the dissipative dynamics of the quark–gluon plasma, demanding a causal and stable formulation of relativistic magnetohydrodynamics (RMHD) beyond standard Israel–Stewart theory. In this contribution, we present recent progress in deriving a second-order RMHD framework for a locally neutral, ultrarelativistic two-component plasma directly from the Boltzmann–Vlasov equation.

We show that magnetic fields induce qualitative modifications to dissipative dynamics that go well beyond the mere appearance of anisotropic transport coefficients. In particular, the dissipative currents no longer relaxes as a single collective degree of freedom, but instead splits into dynamically inequivalent components associated with directions parallel and transverse to the magnetic field [1]. As a consequence, the transient approach to equilibrium can display oscillatory behavior in the strong-field regime, a feature that cannot be captured within conventional Israel–Stewart–type theories. We further demonstrate that the resulting RMHD formulation is linearly causal and stable around global equilibrium [2], providing an essential validation of the framework.

[1] K. Kushwah and G. Denicol, PRD 109 (2024) no.9, 096021.
[2] C. V. P. de Brito, K. Kushwah and G. Denicol, PRD 112 (2025) no.7, 076035.

Speaker: Gabriel Denicol (Universidade Federal Fluminense)

Talk_ICHEP_2026.pdf

5:30 PM Probing Vorticity and Acceleration Fields via Hyperon Polarization in HICs at $\sqrt{s_{NN}}=4.5–11.5$ GeV.

In this talk, we discuss how the spin polarization measurements can reveal the collective dynamics of matter created in heavy-ion collisions at $\sqrt{s_{NN}}=4.5–11.5$ GeV. We simulate Au+Au and Bi+Bi collisions using the PHSD transport model, which accurately reproduces experimental particle yields and momentum spectra. By tracking the system evolution and calculating the stress-energy tensor at each time step, we reconstruct the medium velocity. From this, we compute the vorticity and acceleration fields. The vorticity is concentrated in two oppositely moving elliptic vortex rings along the collision axis. We find a strong radial acceleration ($a \sim 0.1 $GeV) at mid-rapidity and an extreme deceleration ($a \sim 1$ GeV) near beam rapidity. Analyzing the thermodynamic conditions at freeze-out reveals that the medium for antihyperons is hotter and more vortical than for hyperons. We then calculate their spin polarization in the dynamical freeze-out picture, evaluate the feed-down contribution, and analyze the impact of the collision setup. Finally, we inspect the sources of polarization generation and show that the distinct signature of the vortex rings can be isolated experimentally by selecting hyperons with specific momenta.

Speaker: Nikita Tsegelnik (BLTP, JINR)

Tsegelnik-vorticity-acceleration.pdf

5:45 PM Rotational effects on the viscous properties and expansion dynamics of the QGP medium

We have studied the impact of finite angular velocity on the viscous properties and expansion dynamics of a rotating quark-gluon plasma (QGP) medium. In the noncentral events of relativistic heavy ion collisions, the produced QGP medium carries substantial angular momentum, resulting in a measurable angular velocity that can significantly modify its viscous properties. Thus, there exist phenomenological consequences of such rotation on the shear and bulk viscosities of the medium. Using the relaxation time approximation in the relativistic Boltzmann transport equation and incorporating finite angular velocity, we have calculated the shear and bulk viscous coefficients of the rotating QGP medium. Our results indicate that the introduction of rotation enhances both shear and bulk viscosities, reflecting increased momentum transport and amplified local pressure fluctuations. We have further explored the hydrodynamic evolution of the medium within the Bjorken boost-invariant expansion scenario and observed that the presence of rotation leads to a faster decrease of the energy density as compared to the nonrotating case. Hence, rapid rotation enhances the cooling rate of the QGP medium. The present analysis is mainly pertinent to the early-stage hydrodynamic evolution of the QGP, where vorticity and dissipative effects play important roles.

Speaker: Dr Shubhalaxmi Rath (Universidad Mayor)

PROPERTIESmedium_Shubhalaxmi.pdf

6:00 PM Nonlinear Causality and Strong Hyperbolicity of Einstein-Israel-Stewart Theories of Transient Relativistic Fluid Dynamics

We present the first complete analysis of nonlinear causality and local well-posedness for a very general class of bulk and shear viscous theories of relativistic transient fluid dynamics, which encompasses (i) the original Israel-Stewart theory derived from entropy-current arguments, (ii) approaches derived from kinetic theory, and (iii) resummed gradient-expansion based formulations as particular subcases. Our work establishes, for the first time, simultaneously necessary and sufficient algebraic conditions for causality, alongside sufficient conditions guaranteeing strong hyperbolicity, in the full nonlinear regime. These results are rigorously proven for systems coupled to Einstein's equations featuring a dynamic metric, with or without a cosmological constant, and include baryon conservation (in the absence of heat/diffusion currents). The conditions are purely algebraic, require no simplifying spacetime symmetry assumptions or a specific equation of state, and allow all transport coefficients to depend on the dissipative currents. We also demonstrate that the normalization, orthogonality, symmetry, and tracelessness physical constraints on the dynamical variables are properly propagated during the lifetime of the solutions. Our results provide a readily usable toolset with which one can investigate the domain of applicability of relativistic fluid dynamics in numerical and phenomenological studies in heavy-ion collisions and astrophysics.

Speaker: Prof. Jorge Jose Leite Noronha (University of Illinois at Urbana-Champaign)

Noronha_ICHEP 2026 Natal.pdf

4:45 PM → 6:30 PM Detectors for Future Facilities, R&D and Novel Techniques (including Quantum Sensors)

Conveners: Deywis Moreno Lopez (Universidad Antonio Narino (CO)), Ginger Cheng (Nikhef National institute for subatomic physics (NL))

4:45 PM Upgrade II of the LHCb RICH detectors

The High-Luminosity LHC (HL-LHC) will offer unprecedented opportunities for precision flavour physics, while simultaneously posing significant challenges for detector operation in extreme high-occupancy environments. Within the framework of the LHCb Upgrade II program, the Ring Imaging Cherenkov (RICH) detectors are undergoing a comprehensive redesign to cope with substantially increased luminosity up to 1.0e+34 cm-2 s-1, with higher track multiplicities and occupancy approaching those of the current generation general-purpose detectors.
This contribution presents the conceptual design and ongoing research and development activities for the RICH Upgrade II system, expected to take data during LHC Run 5, starting in 2035. The upgraded detectors will employ fast photon sensors with enhanced spatial granularity and picosecond-level time resolution, complemented by optimised optical elements to mitigate occupancy effects. Fully integrated frontend electronics providing precise time stamping will enable four-dimensional particle identification, exploiting timing information to disentangle dense event topologies.
The current status of sensor and optics development is reported, together with simulation studies driving key design choices and first results from test-beam campaigns. These results demonstrate how the targeted technological advances are essential to achieve the LHCb physics goals in the HL-LHC era.

Speakers: Alessia Anelli (Universita e INFN, Cagliari (IT)), on behalf of the LHCb RICH collaboration

Anelli_ICHEP_2026.pdf

5:00 PM The Hyper-Kamiokande 50-cm Photomultiplier Tube

We developed high-performance 50-cm-aperture photomultiplier tubes (PMTs) for Hyper-Kamiokande, the next-generation water Cherenkov detector. Its operation is scheduled to begin in 2028 to address various neutrino physics and nucleon decay searches.

The improved PMT with a box-and-line dynode structure (R12860, manufactured by Hamamatsu Photonics) enhances physics sensitivity through a factor-of-two improvement in timing resolution and twice the detection efficiency compared to the 50-cm PMTs (R3600) used in Super-Kamiokande. In addition, the background rate was reduced, and the mechanical strength against high hydrostatic pressure was doubled.

During the mass production for Hyper-Kamiokande started in 2020, the long-term performance of the PMTs has been ensured through a continuous quality monitoring system. This system utilizes two 8-PMT measurement rooms for detection performance evaluation, two 100-PMT measurement rooms for dark noise stability monitoring, and a 16-PMT measurement setup for year-long stability tests. Detailed characterization was performed to investigate response uniformity and dependence of performance on environmental conditions, such as temperature and the geomagnetic field, to suppress systematic uncertainties.

With the procurement of over twenty thousand PMTs completed in 2026, we report the overall achievements in PMT development, performance validation with quality assurance, and the current status of preparation for detector installation in 2027.

Speaker: Yasuhiro NISHIMURA (Keio University)

20260730_HyperKPhotosensor_ICHEP_YNishimura.pdf

5:15 PM The Photon Detection System of the protoDUNE-VD: Status and First Results

The Deep Underground Neutrino Experiment (DUNE) is a future long-baseline neutrino-oscillation experiment, which will be composed of a Near Detector (ND), located close to the neutrino source at Fermilab (Chicago, Illinois), and a Far Detector (FD) placed at 1300 km from the ND, at the SURF laboratory (Sanford, South Dakota). The DUNE Far Detector will employ four 17-kt active Liquid Argon Time Projection Chambers (LArTPCs) to address fundamental questions in neutrino physics and astrophysics. A key element of the DUNE FD is its Photon Detection System (PDS), based on the innovative X-ARAPUCA light collectors, which enables non-beam physics triggers, improves particle reconstruction, and provides complementary calorimetric information. Large-scale prototypes (protoDUNEs) have been constructed and operated at CERN to validate novel detector technologies under realistic conditions. ProtoDUNE-VD is a 750-ton LArTPC designed with a vertical drift configuration, in which ionization electrons drift vertically under an electric field. This setup provides a full-field test of DUNE’s vertical drift far detector module and is the first opportunity to characterise its PDS. This contribution will present the status of the ProtoDUNE-VD PDS, describe the test program at CERN, and discuss the first outcomes from the collected data, including preliminary performance results.

Speaker: Francesca Alemanno (University of Salento and INFN-Lecce)

FAlemanno_DUNEPDS_ICHEP.pdf

5:30 PM Enhancing Cherenkov Radiation Detection with SiPMs and WLS Films: C-Arapuca-II

The C-Arapuca project advances astroparticle physics by replacing costly, high-voltage photomultiplier tubes with Silicon Photomultipliers (SiPMs). SiPMs offer significant advantages, including high quantum efficiency, low operating voltage (<60V), and an inferior cost, making them ideal for large-scale water-Cherenkov detectors.
The device traps photons using a dichroic shortpass filter that allows Cherenkov radiation to enter a highly reflective cavity. Inside, a wavelength shifter (WLS) absorbs these photons and re-emits them at longer wavelengths. Because the filter reflects these longer wavelengths, the light becomes "trapped" (the arapuca concept) until it is detected by the SiPMs.
Building on the first prototype (C-Arapuca-I), which achieved 80% muon counting efficiency, C-Arapuca-II introduces key enhancements. It replaces the internal WLS bar with a thin WLS to eliminate spurious scintillation signals from the light guide. Additionally, it upgrades individual sensors to SiPM arrays and incorporates front-end electronics directly inside the device to minimize noise and further improve signal quality.

Speaker: Ettore Segreto (University of Campinas UNICAMP (BR))

CArapucaII_ICHEP2026_slidesV2.pdf

5:45 PM Experimental Setup and Simulation of the PoWER proof of concept: a new proposal for large-scale LArTPCs photon detection systems

We present the development of a proof-of-concept (PoC) for the PoWER system, a novel photon detection proposal for large-scale Liquid Argon Time Projection Chambers (LArTPCs). The PoWER system distinguishes itself by integrating veto capabilities, low production cost, and a streamlined assembly process.

This PoC was developed at the Leptons Laboratory (UNICAMP-Brazil), including detector modeling, as well as a liquid-argon-based cryogenic and electronic setup. The device employs four SiPM arrays: two sensitive to VUV light and two for visible light. Its mechanical structure consists of two concentric cubes: an outer cube internally lined with Vikuiti foils and an inner acrylic cube with internal walls covered by PEN foils.

Two alpha sources were used during testing. One source, placed inside the inner cube, produced scintillation light wavelength-shifted by PEN and detected by both SiPM types. A second source, positioned between the cubes, generated light detected exclusively by VUV-sensitive SiPMs, allowing the study of veto capabilities. Additionally, a gamma source located outside the cryostat produced events in both regions, enabling event discrimination.

A Geant4-based Monte Carlo simulation was developed alongside the experimental setup, and the veto performance and light yield of the system for alpha and gamma sources were evaluated.

Speakers: Mirela Barbosa Alves (Universidade Estadual de Campinas), Theo Basso Pilon (Universidade Estadual de Campinas)

Talk_ICHEP_Theo_Mirela.pdf

6:00 PM Preliminary Results on the PoWER Proof-of-Concept

A proof-of-concept test of the PoWER (Polymer Wavelength Shifter and Enhanced Reflection) photon detection system was performed at the Leptons Laboratory, Unicamp. PoWER is an innovative photon detection concept for large liquid argon detectors, aiming at an extremely high light yield of hundreds of photoelectrons per MeV and the capability of actively vetoing events outside the active volume. The system relies on PEN foils as wavelength shifters and on a combination of visible and VUV-sensitive silicon photomultipliers (SiPMs), forming the basis of the active veto. The setup consists of two concentric cubes: an outer $1000~\text{cm}^3$ Teflon cube and an inner $512~\text{cm}^3$ acrylic cube, defining the active volume. The Teflon internal surfaces are covered with Vikuiti reflective foil and four Hamamatsu S14160-6050HS SiPMs, two conventional and two TPB-coated for VUV sensitivity. The acrylic inner walls are lined with PEN foils. Three radioactive sources were used: a natural uranium alpha source inside the active volume, a $^{241}$Am alpha source in the veto region, and an external $^{22}$Na gamma source. The detector operated in liquid argon obtained via \textit{in situ} liquefaction of high-purity gas. A dedicated GEANT4 Monte Carlo simulation of the set-up was developed, and a comparison between real and simulated data will be presented.

Speaker: Lucca Longhitano Pagliuso (Universidade Estadual de Campinas)

Lucca_Pagliuso_PoWeR_Results_ICHEP_2026.pdf

4:45 PM → 6:30 PM Artificial Intelligence, Machine Learning and Quantum Computing in HEP

Convener: Manuel Szewc (UNSAM)

5:15 PM CAIPORA: Embedding Real-Time Intelligence into FPGAs for Instantaneous Supernova Detection

The next generation of neutrino experiments requires high-precision data acquisition systems capable of processing massive data volumes with minimal latency. This work presents the development of the CAIPORA (Compact Artificial Intelligence Placed On Reprogrammable Array), an intelligent trigger system implemented on Field-Programmable Gate Arrays (FPGAs) for the real-time identification of rare, time-dependent events within the photon detection system of a Liquid Argon Neutrino detector.

Utilizing simulated data from Scintillation detectors, we propose a hardware-accelerated approach to distinguish between astrophysical neutrino signals—specifically potential galactic supernova bursts—and radiological backgrounds. The study focuses on the implementation of low-latency algorithms, including simplified neural networks and pulse-shape discrimination, directly into the FPGA fabric.

By processing the scintillation light collected by the sensor arrays, CAIPORA serves as a non-human monitoring system with virtually instantaneous response times. This capability transforms the Liquid Argon Neutrino detector from a passive observer into a proactive detection agent, enabling the issuance of instantaneous alerts and integration into the SNEWS (Supernova Early Warning System). The results demonstrate that this intelligent trigger can make localized, high-speed decisions, significantly reducing data throughput while maintaining high efficiency for low-energy neutrino interactions.

Speaker: Rodrigo Congio

CAIPORA Embedding Real Time Inteligência into FPGAs(1).PDF

5:30 PM Physics-Aware Compilation Digital Twin for Observable-Preserving Three-Flavor Collective Neutrino Simulation on IBM Quantum

Collective neutrino flavor oscillations driven by neutrino–neutrino interactions are a quantum many-body dynamics problem amenable to digital quantum simulation, but near-term superconducting hardware is constrained by circuit depth, two-qubit errors, and topology-dependent routing overhead. Recent three-flavor circuit constructions (including qubit and qutrit encodings) demonstrate small-system feasibility while indicating that recoverable neutrino observables can be dominated by compilation choices rather than the underlying Hamiltonian model. We propose a compilation digital twin that learns hardware-aware strategy selection for three-flavor collective-neutrino time-evolution circuits under a fixed resource budget. Given physics descriptors (system size, coupling regime, evolution time, and target observables such as flavor-survival probabilities and flavor–flavor correlators) and backend descriptors (connectivity and calibrated error rates), the twin predicts an action set (including initial qubit layout, routing/optimization settings, and Trotter term ordering/grouping) to minimize a task objective combining two-qubit gate count, depth, and noisy-simulation observable error relative to ideal evolution. The digital twin is trained on offline compilation sweeps labeled by a task-driven score. We benchmark twin-chosen compilation against standard heuristics across multiple IBM backends and out-of-distribution coupling/time regimes, showing improved preservation of collective-oscillation signatures at matched depth and reduced backend-dependent variability, bridging many-body neutrino simulation proposals to executable NISQ experiments.

Speaker: Dr Jianlong Lu (National University of Singapore)

5:45 PM Dataset Annotation and Event Classification in the CONNIE Experiment

The COherent Neutrino–Nucleus Interaction Experiment (CONNIE) operates 30 meters from the Angra 2 reactor at the Almirante Álvaro Alberto Nuclear Power Plant in Brazil. CONNIE is the first reactor neutrino experiment to employ silicon Skipper-CCDs with the aim of detecting coherent elastic neutrino-nucleus scattering (CEvNS), as well as searching for new physics, and enabling real-time reactor monitoring. A significant challenge lies in reliably identifying the diverse event types within extensive data collected by the detector. To address this, we propose the use of classical machine learning algorithms and convolutional neural networks to categorize events, benchmarking these approaches. A labeled dataset of experimental events was developed using the Annotation Redundancy with Targeted Quality Assurance method, where multiple annotators independently label overlapping data subsets to identify and resolve inconsistencies, leading to a reliable and robust dataset that can be used for training. This work presents recent results from the classification models and shares progress in developing the annotated dataset.

Speaker: Sara Mirthis Dantas dos Santos (Universidade Estadual de Campinas (UNICAMP))

Sara Mirthis - ICHEP 2026.pdf

6:00 PM Multi-task masked autoencoder pretraining for TeV neutrino event reconstruction in FASERCal

Precise reconstruction of high-energy neutrino interactions at the LHC is critical for the physics program of the proposed FASERCal detector, an off-axis neutrino detector for the FASER experiment during LHC Run 4, enabling precision measurements of TeV-scale neutrino interactions in the far-forward region. The detector's highly granular, 3D voxelized geometry produces sparse data that challenges conventional reconstruction techniques. By leveraging a masked autoencoder (MAE) pre-training scheme, our model learns robust representations of particle shower development, overcoming the limitations of standard supervised learning. It uses submanifold sparse convolutions for patching, is trained via a multi-task objective combining patch energy reconstruction and semantic segmentation, and the resulting encoder is fine-tuned for multi-task classification and kinematic regression with task-specific cross-attention heads. The framework achieves high-purity identification of electron and muon neutrino events, and provides first indications of sensitivity to tagging rare tau neutrino events. We demonstrate that this approach achieves highly accurate reconstruction of particle showers, providing precise estimates of the energy and missing transverse momentum, as well as reliable reconstruction of lepton and jet momenta for every event, even in complex topologies.

Speaker: Dr Saul Alonso Monsalve (ETH Zurich)

ichep-sam-26-07-30.pdf

6:15 PM Machine Learning for Physics Analyses and Event Reconstruction at the Pierre Auger Observatory

Ultra-high-energy cosmic rays are particles of extraterrestrial origin with energies exceeding $10^{18}$ eV, which are studied indirectly through the extensive air showers (EASs) they induce in the atmosphere. Determining their energy spectrum and mass composition is crucial for identifying their astrophysical sources. Sensitivity to the primary mass comes from observables related to longitudinal shower development and the muonic component. At the Pierre Auger Observatory, EASs are measured using a hybrid detection technique combining fluorescence telescopes with a Surface Detector (SD) array. The SD consists of 1,660 water-Cherenkov detectors sampling the shower footprint at ground level. To exploit the spatial and temporal information encoded in SD signals, machine learning techniques are employed to complement traditional reconstruction methods. We present an overview of these studies, including deep neural network reconstructions of the depth of the shower maximum ($X_\text{max}$), a novel energy estimator with reduced composition bias, analyses targeting the muonic component of EASs, and classification applications such as photon–hadron discrimination. The adoption of these approaches has enabled new physics results, e.g. an extension of $X_\text{max}$ measurements to higher energies with increased statistics. Together, they demonstrate the growing impact of machine learning on event reconstruction and physics analyses at the Pierre Auger Observatory.

Speaker: Margita Kubátová (Institute of Physics)

ICHEP_kubatova_natal.pdf

6:30 PM → 9:00 PM Social: Welcome reception

Fri, July 31

8:00 AM → 8:30 AM Registration: Day 2

8:30 AM → 10:15 AM Neutrino Physics

Conveners: Cristovao Vilela (Laboratory of Instrumentation and Experimental Particle Physics (PT)), Shirley Li (UC Irvine)

8:30 AM The Water Cherenkov Test Experiment (WCTE): Detector Performance, Beam Monitoring, and Physics Reach

The Water Cherenkov Test Experiment (WCTE) was designed to measure how water Cherenkov detectors respond to sub-GeV particles using multi-PMT (mPMT) technology, delivering direct inputs for the IWCD in the Hyper-Kamiokande experiment. Installed in the CERN East Area T9 beamline, WCTE ran from October 2024 to June 2025 and was instrumented with 97 mPMT modules. During this period, the detector recorded controlled beams of electrons, muons, pions, protons, and tagged photons, covering the energy range most relevant to neutrino interactions. The resulting data set supports future studies in electron/gamma separation, pion identification, and efficient electron/muon discrimination, with relevance to IWCD and other water Cherenkov projects such as ESSnuSB. A dedicated beam monitoring system was developed with two complementary configurations. Charged particles are identified using time-of-flight measurements combined with aerogel Cherenkov counters at multiple refractive indices. Tagged photons are selected using a compact Halbach-array permanent magnet that deflects post-bremsstrahlung positrons, with downstream hodoscopes measuring their momentum. This system enables reliable particle tagging down to approximately 200 MeV/c. This presentation will review the WCTE detector setup, deployment timeline, and beam monitor performance, and will share operational lessons from the campaign. Preliminary physics results from the ongoing analysis will also be presented.

Speaker: Mohit Gola (TRIUMF (CA))

WCTE_ICHEP2026.pdf

8:45 AM Development of a new neutrino composite detector: Chemical Optical Fluoride Engineering (COFE-technology)

This work presents the implementation of a prototype compact reactor antineutrino detector. To detect antineutrinos via the inverse beta decay reaction, the detector combines the following components: a hydrogen-rich base, a high-atomic-number (Z) fluoride scintillator, a neutron-capturing additive, and light-collecting elements. The technology is based on several key principles: delayed coincidence technique, optical compatibility of the system, and high-Z materials enabling compact detection. More than 30 different component configurations were tested, demonstrating the system's high potential for more efficient antineutrino detection.

Speaker: Ms Kseniya Antokhina (Joint Institute for Nuclear Research)

COFE_ICHEP_Antokhina.pptx.pdf

9:00 AM JUNO liquid scintillator backgrounds

The Jiangmen Underground Neutrino Observatory (JUNO) is a cutting-edge neutrino experiment located in Kaiping, south China, with the main goal of determining the Neutrino Mass Ordering (NMO).
In order to do that, JUNO will exploit 20 kton of organic liquid scintillator. Considering that neutrino signals are extremely rare, radiopurity plays a crucial role in JUNO physics analyses. In particular the required radioactive contaminants content in its liquid scintillator for the NMO is 10^-15 g/g of 238U and 232Th.
Reaching such level of radiopurity required several precautions, going from material cleaning and screening to tight radiopurity monitoring and assessment. The beginning of data taking enabled the implementation of offline analyses to monitor the radiopurity of the liquid scintillator and to verify the achievement of the required contamination levels. In particular, this presentation will report the selection strategies adopted for the monitoring of the 238U and 232Th decay chains.

Speaker: Fatima Houria

talk_ICHEP.pdf

9:15 AM X-ARAPUCA Efficiency in the ProtoDUNE-Horizontal Drift prototype

The Deep Underground Neutrino Experiment (DUNE) is a next-generation long-baseline neutrino oscillation experiment designed with a wideband beam to precisely measure oscillation parameters, aiming to determine neutrino mass ordering with very high significance and explore Charge-Parity (CP) violation. The experiment will also have sensitivity to investigate new physics Beyond the Standard Model (BSM) and detect astrophysical neutrinos from supernovae and the Sun.
The DUNE Far Detector will employ advanced Liquid Argon Time Projection Chamber (LArTPC) technology, augmented by a Photon Detection System (PDS) based on X-ARAPUCA — a novel device with highly reflective internal surfaces and an internal photon guide that increases the probability of collecting trapped photons onto a silicon photomultiplier array.
To validate the performance of full-scale detector components, the ProtoDUNE-Horizontal Drift (HD) prototype, a 750-ton LArTPC, was built at CERN and collected data from April to November 2024.This work presents new results from X-ARAPUCA efficiency in the ProtoDUNE-HD using particles from the CERN beamline, with a joint data and MC simulation analysis. Simulations were performed with the Liquid Argon Software (LArSoft) framework employing a semi-analytical photon propagation model to characterize the DUNE PDS response.
These results open new opportunities to improve neutrino detection and reconstruction in DUNE.

Speaker: Gustavo Paixão (Unicamp)

Gustavo_ICHEP_Presentation.pdf

9:30 AM Run 2 of the DUNE ND-LAr 2x2 Demonstrator

The Deep Underground Neutrino Experiment (DUNE) is a long baseline neutrino experiment currently under construction. The upstream target of the Near Detector Complex is the Liquid Argon Near Detector (ND-LAr) designed to measure neutrino interactions before oscillation effects are large. These measurements, in conjunction the Far Detector, will enable the determination of neutrino oscillation parameters with unprecedented precision. A prototype for ND-LAr, the 2x2 Demonstrator, was developed to demonstrate the capabilities of ND-LAr technology. This detector features four pixelated modules, like the ones used in ND-LAr, and sits on-axis to the NuMI neutrino beam in the MINOS Underground Cavern at Fermi National Accelerator Laboratory. In Summer 24’, the 2x2 observed the first neutrino interactions by a DUNE detector. Following this run the 2x2 had a dedicated run using calibration sources to inform future beam studies and ND-LAr.
Four tests were performed in run 2, an Americium-Beryllium neutron source, gamma-emitting isotopes generating a spectrum ranging from 0.511 MeV to 1.836 MeV, Rn220 source injected into the liquid volume, which produced a spectrum of alpha and beta particles, and a Deuterium-Tritium Generator created a spectrum of neutrons peaking at 14 MeV. This talk will present preliminary findings and results from these tests.

Speaker: Thomas Murphy (Fermi National Accelerator Laboratory)

2x2 Run 2 ICHEP-2.pdf

9:45 AM Benchmark TPC Trigger for the DUNE HD Far Detector

DUNE is a next-generation long-baseline neutrino oscillation experiment with a far detector (FD) design based on state-of-the-art Liquid Argon Time Projection Chamber (LArTPC) technology, which allows for detailed reconstruction of neutrino interactions. In order to support DUNE's physics program, the far detector’s trigger system must handle high data rates in real time, identifying potentially interesting physics activity while balancing trigger rates against available data storage and processing resources. This talk outlines the benchmark TPC trigger pipeline for the DUNE FD-HD module, capable of triggering on MeV-GeV scale neutrino interactions within a unified framework. Preliminary trigger efficiencies for key physics signals will also be presented, together with a discussion of how the current algorithm design balances physics performance with DAQ processing constraints.

Speaker: Dr Klaudia Nicola Wawrowska (CERN)

ICHEP2026_DUNE_DATASELECTION_final.pdf

8:30 AM → 10:15 AM Dark Matter

Convener: Juri Smirnov

8:30 AM Recent highlights of dark matter searches from CMS

Determination of the nature of dark matter is one of the most fundamental problems of particle physics and cosmology. This talk presents recent searches for dark matter particles from the CMS experiment at the Large Hadron Collider.

Speaker: Victor Rodriguez Lorenzo (Universidad de Cantabria and CSIC (ES))

VRL_DM_ICHEP2026.pdf

8:45 AM Searches for Dark Matter with the ATLAS Experiment at the LHC

The presence of a non-baryonic Dark Matter (DM) component in the Universe is inferred from the observation of its gravitational interaction. If Dark Matter interacts weakly with the Standard Model (SM) it could be produced at the LHC. The ATLAS Collaboration has developed a broad search program for DM candidates in final states with large missing transverse momentum produced in association with other SM particles (light and heavy quarks, photons, Z and H bosons, as well as additional heavy scalar particles) and searches where the Higgs boson provides a portal to Dark Matter, leading to invisible Higgs decays. The results of recent searches on 13 and 13.6 TeV pp data from the LHC, their interplay and interpretation will be presented.

Speaker: Mohamed Zaazoua (University of Science and Technology of China (CN))

ICHEP_ATLASTalk_DMSearches_MohamedZaazoua-3.pdf

9:00 AM Search for dark sector at BESIII

The BESIII experiment is a symmetric e+e- collider operating at c.m. energy from 2.0 to 4.95 GeV. With the world’s largest threshold production data set of J/ψ (10 billion), ψ(3686) (2.6 billion), and 20 $fb^{-1}$ of D meson pairs from ψ((3770) decay, we are able to search for various dark sector particles produced in e+e- annihilation and meson decay processes. In this talk, we report the search for $K_S$ invisible decay, the search for the massless dark photon with charm FCNC process $D^0\to \omega\gamma’$ and $D^0 \to \gamma \gamma’$, the search for the dark baryon decay in $\Xi \to \pi^- + invisible$, the search for $J/\psi \to \Phi + invisible$, and the search for $X(17)$ with $\Psi(3686)\to X(17) \chi_c^0$, and $\Psi(3686) \to \gamma\chi_c^0 \to \gamma X(17)J/\Psi$.

Speaker: Jianbin Jiao (Shandong University)

DarkSectorBESIII.pdf

9:15 AM Photons, jets and missing momentum from a two-vector dark sector

We investigate the LHC phenomenology of a vector dark-sector effective theory containing two neutral massive vector states, both odd under a dark-parity symmetry. The lightest state is stable and provides a dark-matter candidate, while the leading interactions with the Standard Model arise from dimension-six operators involving the hypercharge field strength. In the prompt-decay regime considered in this work, the heavier state can decay radiatively, leading to a $\gamma+\mathrm{jets}+ E_T^{\mathrm{miss}}$ signature when the two dark vectors are produced in association with QCD radiation. We study this topology at the LHC through a cut-based analysis, comparing an inclusive missing-transverse-momentum selection with a three-bin strategy that retains coarse shape information. The binned analysis is found to substantially improve the expected reach and probes regions of the parameter space compatible with the observed relic abundance in the standard freeze-out scenario. We also discuss the freeze-in interpretation and the limitations associated with the EFT description at high masses.

Speaker: Yoxara Sánchez Villamizar (LPTHE-CNRS/Sorbonne Université & IIP-Natal)

ICHEP_2026_Yoxara.pdf

9:30 AM Probing Axion-Like Particles with Charged Lepton Flavor Violation in MEG II

Charged lepton flavor-violating processes provide a powerful probe of physics beyond the Standard Model, enabled by the high-precision measurements of modern flavor experiments. Many extensions of the Standard Model predict light pseudoscalar particles, such as axion-like particles, which can mediate charged lepton flavor-violating decays and address open questions in particle physics, including the nature of dark matter.

We present a sensitivity study for a parasitic analysis within the MEG II experiment, targeting the decay $\mu \to e a \gamma$ in a V-A chirality configuration, where $a$ denotes an axion-like particle. Using Monte Carlo simulations implemented in GEANT4 and a dedicated data analysis within the ROOT framework, we show that operating the muon beam at a low rate ($R_\mu \simeq 1 \times 10^6\,\mu/\mathrm{s}$) and relaxing the photon trigger threshold to $\mathcal{O}(10\,\mathrm{MeV})$ significantly enhances the experimental efficiency. This optimized strategy allows to achieve a single-event sensitivity competitive with the current best limit on the associated new-physics scale, set by the TWIST collaboration at $10^9$ GeV (95% CL), using only few days of data collected during past runs.

This study demonstrates the strong potential of MEG II to probe axion-like particle parameter space using minimal data.

Speaker: Elia Giulio Grandoni (INFN Pisa, University of Pisa)

ICHEP2026.pdf

9:45 AM Tests of an alternative scenario for supersymmetry and dark matter WIMPs at the high-luminosity LHC

We report calculations of experimental cross-sections and observables for both supersymmetric partners and a dark matter WIMP in a radically revised version of supersymmetry [1-3]. The principal results, with optimal cuts, are the following: (1) The $\approx70$ GeV dark matter WIMP should be detectable at the high-luminosity LHC, perhaps after only two years with an integrated luminosity of 500 fb$^{-1}$. (2) The predictions for a 1500 GeV squark or 1500 GeV gluino can also be tested at the high-luminosity LHC, at slightly above the $5 \, \sigma$ level, after 12 years or 3000 fb$^{-1}$ of integrated luminosity, with less required for lower masses. (3) Weakly interacting superpartners with masses ~ 400 GeV or less can be detected above the $5 \, \sigma$ level at the planned 100 TeV collider.

[1] Roland E. Allen, “Experimental signatures of an alternative supersymmetry”, arXiv:2307.04255v5 and currently under review [Feb. 5, 2026].
[2] Bailey Tallman, Jehu Martinez, Rohan Shankar, Kane Rylander and Roland E. Allen, “Cross-sections and experimental signatures for detection of a well-defined dark matter WIMP”, EPL [Europhysics Letters] 151, 44001 (2025), arXiv:2506.19719 [hep-ph].
[3] Rohan Shankar, Bailey Tallman, Jehu Martinez, and Roland Allen, to be published.

Speaker: Roland Allen (Texas A&M University)

ICHEP 2026.pdf

8:30 AM → 10:15 AM Education & Outreach

Convener: Azwinndini Muronga (Nelson Mandela University)

8:30 AM Particle physics scicomm with grass-roots Instagram: a success story

Since 2023, CMS at DESY's Instagram account has provided science communication and particle physics outreach for a large experimental particle physics group based in Hamburg, the 80+ person international DESY group working at the CMS experiment at CERN’s Large Hadron Collider. Besides the obvious goals of science communication and outreach, this effort aims to train and engage young scientists in outreach and showcase their work.

The communication strategy focuses on highlighting young scientists and offering insights into their scientific journey. The Instagram platform was selected for its demographic alignment with the target stakeholders and broad user base in Germany and abroad. The focus on mixing in more non-science topics is driven by the goal of providing relatable role models and making a connection with the audience. This account showcases how researchers can set up impactful efforts that provide opportunities for science outreach and science communication training for early-career scientists at the lab. In this effort, a large group of contributors collaborates, fostering training in science communication with small time investment for early-career researchers, and is guided by a part-time management team. This talk will cover the project's evolution, objectives, audiences, lessons learned and good practices.

Speaker: Prof. Freya Blekman (Deutsches Elektronen-Synchrotron (DE))

ICHEP2026-CMSatDESY.pdf

8:45 AM IPPOG-BR Strategies for High Energy Physics Outreach in Brazil

In this presentation, we will outline the various strategies implemented by the Brazilian chapter of the International Particle Physics Outreach Group (IPPOG-BR) to engage with the public. IPPOG-BR’s primary aim is to serve as a bridge connecting high-energy physicists, science education researchers, teachers, students, and anyone interested in particle physics within Brazil and other Portuguese-speaking countries.

The organization’s integrated approach features a centralized web portal offering outreach materials and scholarly articles in Portuguese, a regular newsletter, and an active Instagram presence for timely news updates and real-time interactions. IPPOG-BR also conducts frequent remote meetings designed to overcome digital obstacles and foster interaction between scholars and the wider public. These meetings provide opportunities to identify regional projects, which are essential for encouraging collaboration among groups from different regions, with the overarching goal of promoting particle physics throughout Brazil.

Speaker: Fernando Gardim (Federal University of Alfenas)

ICHEP_IPPOG_BR.pdf

9:00 AM The 2025 PolarquEEEst mission: measuring cosmic rays from Italy to Norway with the involvement of students along the route

The Extreme Energy Events (EEE) experiment is a large network of eco-friendly gas- and scintillator-based muon telescopes designed to detect cosmic rays. The EEE Project supports scientific research and education, aiming to immerse students in diverse experiences that showcase many aspects of research, including detector operation, data analysis, field measurements and science communication.
High-energy physics, particularly cosmic-ray research, provides a unique opportunity to engage young people. The PolarquEEEst mission in 2025, organized to measure cosmic-ray flux across a wide latitude range, was highly successful in promoting exchange among students from different countries. During the mission, a scintillator telescope was installed in a car driven from Italy to Norway, covering latitudes from 44.5°N to 70°N, a region previously unexplored in muon-flux studies. These measurements complemented earlier campaigns conducted aboard the Amerigo Vespucci training ship and along the Italian peninsula.
Throughout the journey, scientific stops and outreach events were held at German and Norwegian schools, where Italian students involved in the EEE Project presented their work and explained their role in the research. This helped create an international learning environment in which science became a shared language and a catalyst for cultural exchange.

Speaker: Cristina Ripoli (University of Salerno)

ICHEP2026_Outreach_CRipoli.pdf

9:15 AM REPORT OF THE EXPERIENCE OF A "INTERNATIONAL MASTERCLASS" IN THE 3RD YEAR OF HIGH SCHOOL

This is a report about the experience on conducting an activity like the International Masterclasses - hands-on particle physics, in two 3rd-year high-school classes, aiming to work on the Standard Model of Particle Physics. For the development of this activity I used the book that I wrote as the conclusion of my master’s degree and, during 5 weekly meetings, the following activities were carried out: 1. lectures; 2. application of the flipped classroom methodology to reinforce the learning; 3. experimentation using the HYPATIA software; 4. Solving problem sets, written assessments, analyzing data packages, and searching for specific events to evaluate student’s learning; 5. Analysis and discussion of data obtained in the event classification activity. Due to this activity, a significant increase in student interest in the content was observed, as well as in participation during classes, and an improvement in the results of theoretical and practical assessments on the subject. Conducting a HYPATIA International Masterclass with high school students, with its workload divided among weekly meetings with the class, could be a successful strategy for addressing Modern and Contemporary Physics content, stimulating student interest in this topic.

Speaker: Francisco Augusto da Silva Neto (Intituto Federal Baiano)

REPORT OF THE EXPERIENCE OF AN INTERNATIONAL MASTERCLASS IN THE 3RD YEAR OF HIGH SCHOOL.pdf

9:30 AM Crossing disciplinary and international boundaries in fundamental research: emerging models for training and collaboration

We present a set of international cooperation initiatives in particle physics and related fields that integrate frontier research with training, mobility, and emerging outreach activities. The aim of this contribution is to introduce these programs to the ICHEP community and to invite participation from researchers and students interested in international and interdisciplinary collaboration. A central element is the recently established Max Planck–IAS–NTU Center (MPC) for Particle Physics, Cosmology and Geometry, an international research platform connecting partner nodes in the United States, Germany, and Taiwan. The Center brings together senior scientists, postdoctoral researchers, and graduate students to address research questions that require input across disciplinary boundaries, while embedding mentoring and training directly within collaborative research programs. Complementing this new initiative, the Hanrieder Research Fellowship is an established mobility program that has, for several years, supported the training of young physicists from Latin America at the Max Planck Institute for Physics, contributing to the development of long-term scientific and institutional links. Together, these initiatives provide opportunities for MSc and PhD students to engage in active research, international mobility, and cross-border collaboration. Education and outreach activities—such as graduate schools and focused workshops—are being developed in close connection with the research programs.

Speaker: Johannes Henn

HENN-ICHEP2026_v4.pdf

9:45 AM Global Expansion of a Student-Build Cosmic-Ray Detector and an International Cosmic-Ray Observation Network k for Secondary School Students

Accel Kitchen has produced and distributed free of charge more than 300 cosmic-ray detectors (scintillator + SiPM), primarily in Japan, to junior and senior high school students. Students can select and assemble scintillators suited to their own goals and conduct measurements of cosmic rays and environmental radiation. We have also built a community in which university students support these participants via Discord, a communication platform, enabling more than 200 junior and senior high school students to pursue particle physics research from home. In addition, through the Global Cosmic Group—a worldwide network connecting high schools and outreach organizations—we support detector distribution and cosmic-ray observations for students in many countries beyond Japan, and foster international collaborative measurements. For example, last year, high school students in Japan and Chicago jointly observed and detected a decrease in galactic cosmic-ray intensity caused by a major solar flare.

Speaker: Kazuo Tanaka

Slide

10:00 AM SPRACE Outreach Activities

The São Paulo Research Analysis Center (SPRACE) Collaboration has developed a comprehensive portfolio of outreach activities aimed at promoting particle physics education and public engagement in Brazil and beyond.

This presentation provides an overview of the key initiatives undertaken by SPRACE. These include the design and nationwide distribution of educational posters on elementary particles and the Standard Model, delivered in two editions — the first targeting all high schools and the second all universities in Brazil. SPRACE has also developed an educational video game on particle physics, which has been translated into English and German and adopted by the Austrian Academy of Science. In collaboration with the poet Alice Ruiz and the artist Leda Catunda, SPRACE produced educational materials on the Higgs boson tailored for teachers and students at the elementary school level.

Since 2008, SPRACE has participated in the International Masterclasses — hands-on particle physics events and have developed strong connections with school teachers to introduce particle physics to high school students. Since 2017 SPRACE has included a special edition dedicated to the International Day of Women and Girls in Science. We have successfully replicated these events in several locations across Brazil.

Speaker: Pedro Galli Mercadante (UNESP - Universidade Estadual Paulista (BR))

SpraceOutreachActivities.pdf

8:30 AM → 10:15 AM Higgs Physics

Convener: Marisilvia Donadelli (Universidade do Estado do Rio de Janeiro (BR))

8:30 AM Di-Higgs searches at CMS

The measurement of the production of Higgs boson pairs (HH) at the LHC allows the exploration of the Higgs boson interaction with itself and is thus a fundamental test of the Standard Model theory and has a key role in the determination of the Higgs boson nature. The most recent results from the CMS collaboration on measurements of non-resonant HH production using different final states and their combination using the data set collected by the CMS experiment at a centre of mass energy of 13.6 TeV will be presented

Speaker: Filip Bilandzija (University of Zurich (CH))

Di-Higgs searches at CMS - ICHEP - FBilandzija.pdf

8:45 AM The Higgs window on New Physics: present and future perspective on the RxSM

HL-LHC Higgs precision measurements will provide an unprecedented opportunity to test the Higgs potential, in particular enabling the first measurement of the Higgs self-coupling. In this talk, I will show how these measurements, together with direct searches, can be used to constrain the Singlet Scalar Extension of the Standard Model (RxSM) in the region of parameter space relevant for addressing open problems such as the baryon asymmetry of the Universe and the stability of the Standard Model vacuum. In addition, I will analyze how a potential excess observed at the HL-LHC could be transformed into a discovery at the future FCC-ee+hh experiment.

Speaker: Simone Tentori (UCLouvain)

ICHEP_2026_Tentori_rxSM.pdf

9:00 AM Highlights of the Higgs physics program at future linear e+e- collider

Even with the Higgs boson discovery in 2012, the Standard Model of Particle Physics is still incomplete in description of particle mass spectrum relying on a single number to be inserted by hand – the Higgs self-coupling. At large enough center-of-mass energies of 500 GeV and above, reachable in e+e- collisions only at a linear collider, double-Higgs production provides tree-level sensitivity to the trilinear Higgs self-coupling. Linear Collider Facility (LCF) proposed by the LC Vision community offers competitive Higgs physics program and unbeatable precision of the measurement of the Higgs self-coupling compared to the other e+e- projects. This program will be highlighted, together with the latest projections of the Higgs self-coupling precision, obtained with the reconstruction and algorithm improvements with the ILD detector.

Speaker: Carsten Hensel (CBPF - Brazilian Center for Physics Research (BR))

314_LCVision_Higgs.pdf

9:15 AM Measurements of the CP structure of Higgs boson gauge couplings with the ATLAS detector

While the Standard Model predicts the Higgs boson being a CP-even scalar, CP-odd contributions to the Higgs boson interactions are presently not strongly constrained. This talk will focus on the most recent CP measurements of Higgs boson gauge coupling by the ATLAS experiment based on pp collision data collected at 13.6 TeV in LHC Run 3 and at 13 TeV in Run 2.

Speaker: Zhi Zheng (SLAC National Accelerator Laboratory (US))

Higgs-CP-Zhi-ICHEP2026.pdf

9:30 AM Searches for non-resonant Higgs boson pair production in ATLAS

The Higgs boson pair production (HH) is important for probing Higgs boson self coupling, which has profound implications in validating the electroweak symmetry breaking and understanding vacuum stability of the universe. In this talk, the latest non-resonant HH searches in various decay channels by ATLAS experiment based on LHC Run 3 and Run 2 data will be reported. Related HHH searches will also be covered.

Speaker: Georges Aad (CPPM, Aix-Marseille Université, CNRS/IN2P3 (FR))

ICHEP2026.pdf

10:00 AM New Results for HH → 4b in the Resolved Topology at CMS

We present new results on the search for Higgs boson pair production in the 4b final state using LHC Run 3 data, equivalent of 62 fb-1, collected in 2022 and 2023 by the CMS detector. The analysis focuses on the resolved topology, where both Higgs bosons are reconstructed as a pair of small-radius jets. The analysis includes significant improvements in the trigger selection, heavy-flavor tagging, and analysis techniques, mainly in the signal-to-background discrimination and background estimation. An observed (expected) upper limit is set on the HH production cross section at 95% CL of 5.0 (6.1) times the standard model prediction. In addition to the HH production, this analysis targets the ZZ and ZH processes in the 4b final state - standard candles in the search for HH production. These developments significantly improve the sensitivity for HH → 4b compared to Run 2 and achieve comparable sensitivity for ZZ and ZH with only half the luminosity.

Speaker: Evan Armstrong Koenig (University of Florida (US))

20260731_ICHEP_Parallel.pdf

8:30 AM → 10:15 AM Strong Interactions and Hadron Physics

Convener: Leticia Palhares

8:45 AM Recent results on hadron cross section from the SND detector at VEPP-2000 collider

The overall size of the data, acquired by the SND detector is about 1 fb$^{-1}$ of integrated luminosity in the energy range from 0.3 GeV up to 2 GeV. We announce the results of high precision measurements of the $e^+e^- → \pi^+\pi^-$ and $e^+e^--→ \pi^+\pi^-\pi^0$ cross sections and its implication to the Hadronic Contribution to Muon (g-2). Also we report the results of the analysis of the radiative processes $e^+e^- → \pi^0\gamma$ and $e^+e^- → \eta\gamma$ near mass of the $\phi$-meson, the study of the cross sections of $e^+e^- → n\bar{n}$ and $e^+e^- → \omega\eta\pi^0\pi^0$ processes, the dalitz analysis of $e^+e^-→ \pi^+\pi^- \pi^0$ process at the energy range $\sqrt{s}$= 1.05–2 GeV and the measurement of the inclusive hadronic cross section at 1.8 GeV < $\sqrt{s}$ <2 GeV.

Speaker: Dr Tatyana Dimova (Budker Institute of Nuclear Physics, Novosibirsk)

Dimova_SND_v1.pdf

9:00 AM Status of Radiative Corrections and Monte Carlo Generators for low-energy e+e- into leptons and hadrons final states: the RadioMonteCarLow2 effort.

The analysis of low-energy $e^+e^-$ scattering experiments at electron-positron colliders requires robust and precise Monte Carlo generators, which are essential for precision tests of the Standard Model, such as the dispersive evaluation of the hadronic vacuum polarization contribution to the muon $g−2$. As part of the community-driven initiative RadioMonteCarlow2, we aim to collect these Monte Carlo tools, compare them, and facilitate their access. This initiative has been working on providing the community with codes that are able to produce differential cross-section distributions for processes related to $e^+e^- \to $ leptons and hadrons at center-of-mass energies of a few GeV. In this talk, I will report on the ongoing activities of the initiative and the results of Phase I of this effort, published as 10.21468/SciPostPhysCommRep.9, which presents a detailed comparison of Monte Carlo codes for $e^+e^−$ scattering into muon, pion, and electron pairs, both for energy-scan and radiative-return experiments. This first phase is a theoretical exercise which focuses on comparisons without reference to experimental data, aiming to clarify the importance of different physics effects and approaches in realistic experimental setups.

Speaker: Jeremy Paltrinieri

ICHEP_26_JP.pdf

9:15 AM Perturbative QCD below charm threshold: theory and tensions with $e^+e^-$ data

Precise measurements of the inclusive hadronic ratio $R(s)$ below charm-quark threshold by the BESIII collaboration show a significant tension with perturbative QCD (pQCD) predictions as well as with earlier results from the KEDR collaboration. In this work, we scrutinize the pQCD prediction for $R(s)$ with three active flavors, analyzing the perturbative behavior through its Borel transform and investigating potential instabilities due to renormalons, quark-mass corrections, and residual duality violations. We integrate the theoretical prediction for $R(s)$ to obtain the hadronic vacuum polarization (HVP) contribution to the anomalous magnetic moment of the muon, $a_\mu^{\rm HVP}$, and quantify the discrepancy between theory and the different data sets for both $R(s)$ and $a_\mu^{\rm HVP}$ in the region considered. Finally, we combine the available data sets into a single, more precise data set and assess the discrepancy both locally and in integrated contributions to $a_\mu^{\rm HVP}$.

Speaker: Marcelle Caram (University of Sao Paulo)

Marcelle-ICHEP2026-talk-presentation.pdf

9:30 AM A precise NNLO determination of the strong coupling and top-quark mass from high-energy data

We present a determination of the strong coupling $\alpha_S(M_Z)$ and top quark mass in the $\overline{MS}$ scheme $m_t(m_t)$ from a global NNLO QCD analysis of inclusive deep inelastic scattering (DIS) data combined with the recent data on top-quark pair and Drell–Yan production from the LHC and Tevatron. To suppress the contribution of power corrections, we impose stringent cuts on momentum transfer squared $Q^2_{min}$ in DIS and perform fits without explicit higher-twist terms. We observe a clear stabilization of the extracted values of $\alpha_S(M_Z)$ and $m_t(m_t)$ for $Q^2_{min} > 10$ GeV$^2$. Our nominal results for $\alpha_S(M_Z)$ and $m_t(m_t)$ are consistent with previous determinations including higher-twist modeling. This demonstrates that high-energy collider data compensate for reduced DIS statistics and enable a robust extraction of these two parameters with a significant reduction of correlation.

Speaker: Oleksandr Zenaiev (Hamburg University)

Zenaiev-ICHEP2026-fits.pdf

8:30 AM → 10:15 AM Beyond the Standard Model

Convener: Nicolás A. Neill (Universidad Mayor)

8:30 AM From Minimal Vector Dark Matter to a Electroweak-Dark Matter Unification

Originally, the Minimal Dark Matter (MDM) paradigm focused on scalar and fermionic dark matter candidates. Over the years, we have extended this framework to include vector dark matter (VDM) transforming under different representations of $SU(2)_L$. Among these possibilities, the adjoint representation emerges as the most promising scenario. Nevertheless, the presence of unitarity violation indicates that the model cannot be considered ultraviolet complete in its original formulation.

This issue naturally motivates a more fundamental construction in which the non-standard vector fields are promoted to gauge bosons of a new local $SU(2)$ symmetry. Remarkably, this approach leads to a theory equivalent to one based on the gauge group $SO(4)_L \times U(1)_Y$. In this framework, the six gauge bosons of $SO(4)$ are composed of the Standard Model electroweak gauge fields together with the exotic vector triplet. After the spontaneous breaking of $SO(4)_L$ down to the Standard Model gauge symmetry, a residual global $Z_2$ symmetry remains, ensuring the stability of the vector dark matter candidate.

In this talk, I will briefly review the vector realization of the Minimal Dark Matter paradigm and then focus on the structure and phenomenological implications of the Electroweak–Dark Matter unified model.

Speaker: Prof. Alfonso Zerwekh (Universidad Tecnica Federico Santa Maria)

Alfonso_Zerwekh_EW_DM_Unification.pdf

8:45 AM A hybrid scotogenic model for linear and inverse seesaw neutrino masses

I will describe a model in which the tiny active neutrino masses arise from an interplay of linear and inverse seesaw mechanisms at two loop level. One of the distinctive features of the model is a fermionic dark matter candidate whose mass is generated at one loop, whereas scalar dark matter masses arise at tree level. The model satisfies current constraints from neutrino oscillation data, dark matter direct detection, invisible Higgs decays, $Z'$ searches, and charged lepton flavor violation. The outcome of our analysis is that the inverse seesaw contribution dominates over the linear one, suggesting that atmospheric neutrino mass squared splitting arises from the inverse seesaw mechanism, whereas the solar one is generated from the linear seesaw.shows a slight preference for the normal neutrino mass ordering.

Speaker: Antonio Enrique Cárcamo Hernández (Universidad Técnica Federico Santa María)

TalkACarcamo2loopLSandISICHEP2026.pdf

9:00 AM UV-Safe Unification in Five Dimensions: Stable Orbifolds and Fixed-Point Constraints

Asymptotic grand unification (aGUT) replaces conventional fixed-scale unification by ultraviolet-safe flows toward a common interacting fixed point. Five-dimensional orbifold gauge theories are a natural arena for aGUT model building, but viability requires both a stable orbifold vacuum and consistent UV fixed points. I present general stability criteria for gauge breaking on $S^1/(\mathbb{Z}_2\times\mathbb{Z}_2^\prime)$ and a systematic classification of symmetry-breaking patterns in bulk $SU(N)$, $SO(N)$, and $Sp(N)$ theories. Applying these criteria singles out viable routes, including a unique $SU(6)$ pathway to the Standard Model and an $SU(8)$ realization with an intermediate Pati-Salam stage. I then discuss the exceptional-group case: under minimal assumptions, stable orbifold vacua do not yield a minimal exceptional (non-SUSY) aGUT, motivating non-minimal ingredients. Finally, I summarize one-loop renormalization results for 5D gauge-Yukawa theories, deriving conditions for simultaneous UV fixed points in gauge, Yukawa, and scalar couplings. These conditions provide a useful discriminator between genuinely UV-consistent 5D models and effective descriptions.

Speaker: Roman Pasechnik (Lund university)

ICHEP26_Pasechnik_UVsafe.pdf

9:15 AM Very Special Relativity Models: Infrared Regularization and Loop Corrections

We review the $Sim(2)$ invariant infrared regularization of Very Special Relativity models that we have proposed recently and apply it to compute loop corrections in quantum electrodynamics with VSR masses for neutrino and photon. We computed the anomalous magnetic moment of the electron and using the most recent data for the photon mass, we obtain a bound for the electron
neutrino mass.The total cross section of scattering of light by light exhibits tiny anisotropies that could be detected at cosmological scales. In particular, they should be looked at the Cosmic Microwave Background(CMB) Radiation for low photon frequencies.

 Ref:JHEP 06(2023)003;Phys. Lett. B 858(2024)139021

Speaker: Prof. Jorge Alfaro (Pontificia Universidad Católica de Chile)

VSRSM.pdf

9:30 AM Flavour-covariant evolution of Standard Model charges in cloistered baryogenesis

The problem of Baryon Asymmetry of the Universe can be addressed through nonperturbative interactions that violate baryon ($B$) and lepton ($L$) charges. To this end, we consider the Type-I seesaw model extended by the introduction of a new coloured scalar, coupled to right-handed neutrinos and up-type quarks through a $B$-conserving interaction. The scalar is assumed to be chemically decoupled from the SM thermal bath. Accordingly, the decay channel of the RH-neutrinos produces equal and opposite sign $B$-asymmetries in the two final-state particles. The scalar B-asymmetry ($B_{s}$) remains conserved before the electroweak phase transition. On the other hand, the thermal equilibrium between up-type quarks and the electroweak sphalerons transfers this $B$-asymmetry ($B_u$) into lepton asymmetry, resulting in a net non-vanishing B-asymmetry ($B_s+B_u\neq 0$), in addition to the $B$-asymmetry from the Type-I seesaw interactions. To study this model, we describe the evolution of the lepton and baryon flavour charges by taking into account the complete SM flavours and spectator effects in a baryon- and lepton-flavour basis-invariant way. This extends the validity of the model from $T\sim10^{15}$ GeV down to the weak scale. If the scalar mass is of $\mathcal{O}$(TeV), its signatures might be observed by the LHC detectors as a long-lived particle.

Speaker: Sergio Manuel Cubides Pérez (Universidade Federal do ABC)

FlavourCloistered.pdf

9:45 AM MicroBooNE's Beyond the Standard Model Program

MicroBooNE is an 85-tonne active mass liquid argon time projection chamber (LArTPC) at Fermilab. Between 2015-2021, the detector recorded a wealth of neutrino interactions from both the Booster Neutrino Beam (BNB) and Neutrinos at the Main Injector (NuMI) beams. MicroBooNE's exceptional capabilities for fine-grained tracking, particle identification, and calorimetry make it a powerful detector not just to explore neutrino physics, but also for Beyond the Standard Model (BSM) physics. This talk will highlight MicroBooNE's rich BSM program, including recently released searches for dark neutrino decay to an e+e- pair, dark trident processes, heavy neutral leptons and Higgs portal scalars. The talk will also discuss the status of other ongoing analyses. Furthermore, we will present efforts to develop novel tools for BSM analyses that will prove invaluable for the upcoming Deep Underground Neutrino Experiment (DUNE).

Speaker: David Martinez Caicedo (South Dakota School of Mines and Technology)

MicroBooNE_ICHEP2026_BSM.pdf

10:00 AM Discovering neutrino trident scattering at the Forward Physics Facility and implications for new physics

Neutrino trident scattering is the process of creating a pair of charged leptons induced by neutrinos in the Coulomb field of a nucleus, described by the reaction $\nu_l + A \rightarrow \nu_{l^{'}} + l^{+} + l^{-} + A'$. In the Standard Model, this process involves the exchange of both $Z^0$ and $W^{\pm}$ bosons, and there is experimental evidence for it from muon neutrino interactions by three experiments: CHARM-II, CCFR, and NuTeV. Recent studies suggest that this process may be sensitive to physics beyond Standard Model, as the cross-section calculated via Standard Model gauge boson exchanges is well established. Our work investigates neutrino trident scattering in neutrino-tungsten interactions at the Forward Physics Facility at the Large Hadron Collider (LHC) and Future Circular Collider (FCC). We estimate the cross-sections for a pair of muons in the final state in coherent and incoherent interactions. Additionally, we examine the impact of a $Z'$ gauge boson on both cross-sections and associated events at the FASER$\nu$2 detector. Our results indicate that neutrino trident process can be discovered at the Forward Physics Facility at the LHC and its measurement at FCC can probe new regions in the mass–coupling constant parameter space of the new gauge boson $Z'$.

Speaker: Reinaldo Francener (Universidade Estadual de Campinas)

TridentFPF_ICHEP.pdf

8:30 AM → 10:15 AM Operation, Performance and Upgrade of Present Detectors

Conveners: Federica Oliva (The University of Edinburgh (GB)), Silvia Gambetta (The University of Edinburgh (GB))

8:30 AM ALICE Forward Calorimeter upgrade (FoCal): physics program and expected performance

The FoCal is a high-granularity forward calorimeter to be installed as an ALICE upgrade during the LHC Long Shutdown 3 and take data in Run 4. It will cover a pseudorapidity interval of $3.2 < \eta < 5.8$, allowing to explore QCD at unprecedented low Bjorken-$x$ of down to $\approx 10^{-6}$ -- a regime where non-linear QCD dynamics are expected to be sizable.
The FoCal consists of a compact silicon-tungsten sampling electromagnetic calorimeter with pad and pixel readout to achieve high spatial resolution for discriminating between isolated photons and decay photon pairs. Its hadronic component is constructed from copper capillary tubes with scintillator fibers.
The detector design allows measuring a multitude of probes, including direct photons, jets, as well as photo-production of vector mesons in ultra-peripheral collisions and angular correlations of different probes.
After the recent completion of the Technical Design Report (https://cds.cern.ch/record/2696471), the FoCal project is entering the production phase in view of installation in 2028.
We will give an overview of the FoCal physics programme, of its detector design and of its expected performance using results from recent test beams of small-scale prototypes.

Speaker: Marco Bregant (Universidade de Sao Paulo (USP) (BR))

ICHEP26_AliceFoCal_Bregant.pdf

8:45 AM The ATLAS Liquid Argon Calorimeter Phase-II Readout Upgrade for the High-Luminosity LHC

The ATLAS Liquid Argon (LAr) calorimeter readout electronics are being upgraded for operation at the High-Luminosity LHC (HL-LHC), where up to about 200 proton-proton interactions per bunch crossing will result in severe pileup and overlapping signals. The Phase-II upgrade replaces the full readout chain from the front-end electronics to the off-detector processing to preserve precision calorimetry and triggering.
New radiation tolerant front-end boards will digitize all calorimeter channels at the 40 MHz bunch crossing rate using custom low noise preamplifier-shaper ASICs providing two gain scales and high-resolution ADCs. A new calibration system based on dedicated pulser and DAC ASICs ensures accurate channel response. Prototype boards are available and system-level integration tests are ongoing.
The off-detector electronics will use ATCA compliant signal-processing boards equipped with large FPGAs and high-speed optical links, performing real-time reconstruction of energy and timing information with low latency. In the HL-LHC pileup environment, the performance of traditional optimal filtering techniques degrades due to overlapping pulses. Machine learning-based reconstruction approaches implemented in FPGA firmware are being investigated as complementary solutions.
This contribution presents the Phase-II readout architecture and the status of prototyping and integration in view of installation during LHC Long Shutdown 3.

Speaker: Lauren Melissa Osojnak (Columbia)

ICHEP2026.pdf

9:00 AM ALICE 3: a next-generation heavy-ion detector for LHC Run 5

The ALICE Collaboration proposed a new apparatus, ALICE 3, for the LHC Run 5. The detector consists of a large pixel-based tracker with a large pseudorapidity acceptance, complemented by systems for particle identification, including silicon time-of-flight layers, a ring-imaging Cherenkov detector, a muon identification system, and forward detectors for event characterisation. Track pointing resolution of better than 10 micron for $p_T$ >200 MeV/c can be achieved by placing the vertex detector on a retractable structure inside the beam pipe. ALICE 3 will, on the one hand, enable novel studies of the quark-gluon plasma and, on the other hand, open up important physics opportunities in other areas of QCD and beyond. The main new studies in the QGP sector focus on low-$p_T$ heavy-flavour production, including beauty hadrons, multi-charm baryons and charm-charm correlations, as well as on precise multi-differential measurements of dielectron emission to probe the mechanism of chiral-symmetry restoration and the time-evolution of the QGP temperature. Besides QGP studies, ALICE 3 can uniquely contribute to hadronic physics, with femtoscopic studies of the interaction potentials between charm mesons and searches for nuclei with charm. The presentation will cover the detector concept, the physics performance, and the status of detector R&D.

Speaker: Marcelo Gameiro Munhoz (Universidade de Sao Paulo (USP) (BR))

ICHEP2026_MGMunhoz.pdf

ICHEP2026_MGMunhoz.pptx

9:15 AM Research and Development for the ATLAS Event Filter Calorimetry software in HL-LHC

The ATLAS detector is concluding the Run 3 data-taking period with an average number of proton–proton collisions per bunch crossing around 65. This number is expected to reach about 200 during the High-Luminosity LHC phase, imposing increased demands on the data acquisition and trigger systems of the experiment. The ATLAS trigger software will be required to process event rates of up to 1 MHz. A large upgrade programme is investigating the possible usage of new technologies, such as Machine Learning techniques and hardware accelerators. This work focuses on the Calorimeter Topological Clustering algorithm, which is presently used both offline for event reconstruction and online in the trigger within a CPU-based environment. This is the dominant consumer of computing resources in the calorimeter trigger, hence, was selected for practical viability and performance improvement studies. As a baseline, the current CPU-based solution is discussed using the existing software under Run 4 and HL-LHC conditions. A ready-to-use GPU-based solution is also presented with its physics and processing performance results. An FPGA-based solution is also described, with emphasis on its memory requirements that limit the algorithm performance outcome. Finally, a completely new convolutional neural network approach to jet reconstruction is presented.

Speaker: Patricia Conde Muino (Laboratory of Instrumentation and Experimental Particle Physics (PT))

Slides

Slides

9:30 AM CMS Track Trigger for the High-Luminosity LHC

The HL-LHC will provide amazing opportunities to make high-precision measurements, but will also present significant challenges due to the presence of up to 200 proton-proton interactions per bunch crossing. To maintain the excellent performance of the CMS experiment in this harsh environment, CMS will be upgraded to allow for the use of tracking in the Level-1 trigger. CMS will perform track reconstruction for tracks with transverse momentum above 2 GeV in every bunch crossing using the CMS track finder, an ATCA module equipped with high-speed optical transceivers and high-performance FPGAs that will run a highly parallel track reconstruction algorithm. In this talk, we present the recent progress and current status of the track finder including hardware validation, firmware development, and system testing.

Speaker: Michael Oshiro (Cornell University (US))

oshiro_2026_07_31_tf_ichep.pdf

9:45 AM Upgrade of ATLAS Hadronic Tile Calorimeter for the High Luminosity LHC

The Tile Calorimeter (TileCal) is a sampling hadronic calorimeter covering the central region of the ATLAS experiment. The High- Luminosity phase of LHC, delivering five times the LHC nominal instantaneous luminosity, is expected to begin in 2030. TileCal will require new electronics to meet the requirements of a 1 MHz trigger, higher ambient radiation, and to ensure better performance under high pile-up conditions. Both the on- and off-detector TileCal electronics will be replaced. PMT signals from every TileCal cell will be digitized and sent directly to the back-end electronics, where the signals are reconstructed, stored, and sent to the first level of trigger at a rate of 40 MHz. This will provide better precision of the calorimeter signals used by the trigger system and will allow the development of more complex trigger algorithms. The ongoing developments for on- and off-detector systems, together with expected performance characteristics and results of test-beam campaigns with the electronics prototypes will be discussed.

Speaker: Tiago Quirino (Universidade do Estado do Rio de Janeiro (BR))

Presentation ICHEP.pdf

10:00 AM The upgrade of the CMS Electromagnetic Calorimeter for the High-Luminosity LHC

The High-Luminosity upgrade of the LHC at CERN will provide unprecedented instantaneous and integrated luminosity, with an average number of collisions per bunch crossing of 140-200. The entire readout and trigger electronics will be replaced in the Barrel region of the CMS Electromagnetic Calorimeter (ECAL). The lead tungstate crystals and APDs will be retained, but the operating temperature will be lowered to mitigate radiation-induced noise. With the upgrade, ECAL will maintain the current energy performance while significantly improving time resolution. The results from the latest ECAL test beams will be shown and discussed.

Speaker: Mattia Campana (Northeastern University (US))

ICHEP_2026_ECAL_upgrade_cms.pdf

8:30 AM → 10:15 AM Quark and Lepton Flavor Physics

Conveners: Jianchun Wang (Chinese Academy of Sciences (CN)), Sandra Amato (Univ. Federal do Rio de Janeiro (BR))

8:30 AM Measurements of the CKM gamma using LHCb Run 1 and Run 2 data

A precise determination of the CKM angle gamma is a central goal of the LHCb experiment. During the first two runs of the LHC, the LHCb experiment collected 9 inverse femtobarn of data. This well-understood dataset continues to yield new measurements of gamma through the development of new analysis techniques that can harness more sensitivity from the data. We present the most recent results in this area, with focus on measurements of γ using new techniques.

Speaker: Halime Sazak (RWTH Aachen University)

HalimeSAZAK_ICHEP.pdf

8:45 AM First CKM angle γ results from the upgraded LHCb detector

Studies of CP violation in the quark sector are essential for understanding the weak interaction and can provide mechanisms for observing physics beyond the Standard Model. We present the first measurements of the CKM angle γ and related CP observables with data collected during Run~3 of the LHC using the upgraded LHCb detector. The higher instantaneous luminosity and the software-only trigger of the LHCb Upgrade significantly enhance the efficiency for such hadronic final states, enabling this single year of data-taking alone to provide a notable improvement on precision.

Speaker: Marcelo Bovill (University of Oxford)

ICHEP_2026_Gamma_Talk.pdf

9:00 AM Studies of quantum entanglement in $\Upsilon(4S)\to B^0 \bar{B}^0$ decays and $C\!P$ violation at Belle II

The Belle II experiment has collected a 500 fb$^{-1}$ sample of $e^+e^-\to B^0\bar{B}^0$ decays at a center-of-mass energy corresponding to the $\Upsilon(4S)$ resonance. The Standard Model predicts that the two $B^0$ mesons are quantum-entangled, leading to characteristic time-dependent decay rates of the $B$ mesons. We present tests of disentanglement of the $B$ mesons. We also present a measurement of $\sin 2\beta$ in $B\to \psi K^0$ events.

Speaker: Sagar Hazra (Max-Planck-Institute for Physics)

ICHEP_2026_Sagar.pdf

9:15 AM CP violation in beauty to open charm decays at LHCb

Decays of beauty hadrons to final states containing open charm mesons offer a rich programme of CP violation measurements at the LHCb experiment. Beyond the determination of the CKM angle gamma, which is presented separately at this conference, these decays provide sensitivity to CP-violating phases through time-dependent analyses and allow searches for direct CP asymmetries across a variety of decay modes. The most recent of such measurements from the LHCb experiment are presented.

Speaker: Vava Gligorov (Centre National de la Recherche Scientifique (FR))

B2OC_CPV_LHCb_ICHEP_2026_v1.pdf

9:30 AM CP violation in the decay of beauty baryons at LHCb

While CP violation is well established in meson decays, its observation in baryon decays remains an open challenge. The LHCb experiment, designed to study CP violation in particles containing bb quarks, has collected an unprecedented dataset, offering a unique opportunity to probe CP asymmetries in baryon decays. This talk will present the latest LHCb results on CP violation in baryon decays, including the first evidences and observation, with a focus on $\Lambda_b^0$ decays to charmless and charmonia final states.

Speaker: Albert Lopez Huertas (University of Barcelona (ES))

ICHEP2026.pdf

9:45 AM Searches for New Physics in $B$-meson decays to vector mesons and charmless final states at LHCb

$B$-meson decays into two vector mesons, $B\to VV$, constitute a class of decays of special interest. These decays are generally mediated by both loop and tree processes, making the measurement of their CP asymmetries, polarisation variables, and branching fractions especially interesting and challenging. For $B\to VV$ decays, any enhancement in one of those variables would be a hint for new physics. Besides, searches for new decay modes and branching fraction measurements are performed in charmless decays. Measuring these branching fractions and comparing them with theoretical predictions provides valuable insights into various theoretical frameworks, contributing to refined predictions for branching fractions and CP asymmetries in other charmless decay modes. These measurements serve as tests of the Standard Model, where deviations could signal the presence of New Physics. This talk will provide an overview of several recent LHCb results covering these studies.

Speaker: Chen Chen (University of Warwick (GB))

B2VV_ICHEP2026_chenchen.pdf

10:00 AM Global fits of the Unitarity Triangle within the Standard Model. Updates from the UTfit collaboration.

Flavour physics represents a unique test bench for the Standard Model (SM). New analyses performed at the LHC experiments and new results coming from Belle II are bringing unprecedented insights into CKM metrology and new results for rare decays. The CKM picture provides very precise SM predictions through global analyses.
We present here the results of the latest global SM analysis performed by the UTfit collaboration including all the most updated inputs from experiments, lattice QCD and phenomenological calculations for Summer 2026. We also present the perspectives for future UT analyses incorporating projections of experimental results and Lattice QCD computations after HL-LHC.

Speaker: Marcella Bona (Queen Mary University of London (UK))

bona-utfitSM.pdf

8:30 AM → 10:15 AM Heavy Ions

Convener: Lee Barnby (University of Derby (GB))

8:30 AM Strangeness measurement at LHCb

The production of strange hadrons in high-energy collisions offers valuable in-sight into hadronization, parton fragmentation, and nuclear effects. While strangeness enhancement has been associated to quark-gluon plasma formation in heavy-ion collisions, recent observations in small systems challenge conventional hadronization models. In this context, proton–nucleus collisions offer a valuable testing ground to study cold nuclear matter effects and nuclear modifications. To shed light on this complex scenario, the LHCb detector, with its unique forward acceptance and excellent particle identification, enables detailed studies of strangeness production in both collider and fixed-target modes over a unique kinematic range. New results on strange hadron production will be presented, providing new constraints on hadronization dynamics and nuclear effects in small systems.

Speaker: Cesar Luiz Da Silva (Los Alamos National Laboratory (US))

ICHEP-StrangenessLHCb-v3.pdf

ICHEP-StrangenessLHCb-v3.pptx

8:45 AM Local Lambda polarization in light-ion collisions with ALICE at LHC

Ultra-relativistic nuclear collisions create strongly interacting matter at extreme temperatures and energy densities, forming a quark–gluon plasma (QGP). Its space-time evolution is characterized by strong collective expansion, giving rise to anisotropic flow and demonstrating its nearly perfect fluid nature. This anisotropic motion generates local shear and vorticity along the beam direction, which induces a longitudinal component of hadron polarization via spin-orbit coupling. Measurements in heavy-ion collisions have revealed non-zero local $\Lambda$[uds] polarization, establishing it as a sensitive probe of the local vortical structure of the QGP. In contrast, light-ion collisions provide smaller, shorter-lived systems, where collectivity may be reduced or only emerging, offering a unique opportunity for testing the limits of hydrodynamics, the role of initial-state effects, and the mechanisms of angular-momentum transport at the smallest scales.

In this talk, we present new measurements of local $\Lambda$ polarization in light-ion collisions with the ALICE detector at the LHC. By comparing these results with observations in Pb–Pb, theoretical predictions and the available measurements from the CMS collaboration in p-Pb collisions, we probe the onset of vortical phenomena in small systems and assess the minimal conditions required for the emergence of spin-vorticity coupling in QCD matter.

Speaker: Sourav Kundu (CERN)

ICHEP_sourav.pdf

9:00 AM Elucidating the origin of the apparent strangeness enhancement with multiplicity in the jet-like region measured in pp collisions at 13 TeV

The ALICE collaboration has measured the production of K$^{0}_{\rm S}$ and $\Xi^{\pm}$ in pp collisions at $\sqrt{s}=13$\,TeV in the direction of the leading charged particle and in the direction transverse to it. The $\Xi^{\pm}$ yield normalized to the K$^{0}_{\rm S}$ yield is found to increase with the charged particle multiplicity for both the transverse-to-leading and the toward-leading (jet-like) regions. Although, the enhancement in the transverse-to-leading region which is sensitive to the underlying event can be understood as due to medium(-like) effects, the result for the jet-like region is striking. The effect in the jet-like region is qualitatively reproduced by PYTHIA8 with rope hadronization and EPOS LHC. The medium(-like) effects in the leading charged particle $p_{\rm T}$ spectrum using different Monte Carlo models (AMPT, EPOS4 and PYTHIA8 with the color ropes mechanism) is studied. A medium(-like)-free $p_{\rm T}$-leading threshold for angular correlation studies involving high-$p_{\rm T}$ hadrons is reported, where the leading particle $p_{\rm T}$ spectrum is unaffected by medium(-like) effects. Since the measurements reported by ALICE were performed considering a significantly lower $p_{\rm T}$ leading threshold, the apparent strangeness enhancement in the jet-like region can be explained in terms of a bias due to the misidentification of the leading particle.

Speaker: Dushmanta Sahu (Universidad Nacional Autonoma (MX))

Dushmanta-ICHEP-strangeness.pdf

9:15 AM $\Sigma^{0}$ production with the ALICE detector at the LHC

ALICE at the LHC was designed to study the properties of Quantum Chromodynamics (QCD) from pp to heavy-ion collisions. In this context, the measurement of the $\Sigma^{0}$ baryon could serve as an additional test of isospin symmetry, which predicts the ratio of the yields of $\Sigma^{0}$ and $\Lambda$ baryons to be 1/3 according to their isospin projections. In addition, exploring this ratio across different systems could provide insights on the mechanisms behind the production of $\Sigma^{0}$ particles.
In this contribution, the measurements of the production yields of the $\Sigma^{0}$ baryon and its antiparticle are presented as a function of transverse momentum in pp collisions at $\sqrt{s}$ = 13.6 TeV with ALICE. This study reconstructs $\Sigma^{0}$ candidates via the electromagnetic decay $\Sigma^{0} \rightarrow \Lambda + \gamma$, exploiting the $ \Lambda \rightarrow \mathrm{p} + \pi$ decay channel and the Photon Conversion Method (PCM). The results are compared with different Monte Carlo generators and with $\Lambda$ baryon yields to test isospin symmetry. In addition, the first results of $\Sigma^{0}$ production in pO collisions at $\sqrt{s_{\rm NN}}$ = 9.62 TeV and Ne–Ne collisions at $\sqrt{s_{\rm NN}}$ = 5.36 TeV are presented.

Speaker: Gianni Shigeru Setoue Liveraro (University of Campinas (UNICAMP))

GSSLiveraro_ICHEP_FinalVersion.pdf

9:30 AM Multiplicity dependence of strange hadron production in- and out-of-jets with ALICE

ALICE experiment observations at the LHC show that strange to non-strange hadron yield ratios increase with charged-particle multiplicity. This smooth evolution spans three orders of magnitude across collision systems, eventually saturating in central Pb–Pb collisions. To explain this strangeness production in small systems, models such as statistical hadronization with canonical suppression and color rope hadronization with color reconnection have been proposed.

In this contribution, we present measurements of strange-hadron production inside and outside jets as a function of event multiplicity in pp and p–Pb collisions, using complementary techniques and exploring the statistics collected by ALICE during Run 2 and Run 3. New results are reported on strange and multi-strange particle production in and out of jets, obtained with full jet reconstruction, as well as with two-particle azimuthal correlations between high-$p_{\mathrm{T}}$ charged hadrons and identified strange particles. The results are compared with state-of-the-art model predictions, providing new insights into the interplay between hard and soft QCD processes governing strangeness production in small collision systems.

Speaker: Lorenzo Bernardinis (Universita e INFN Trieste (IT))

Bernardinis_Lorenzo-ICHEP_2026.pdf

9:45 AM The role of strangeness in heavy-quark hadronization from small to large collision systems with ALICE

Measurements of charm hadrons with strange-quark content provide a sensitive test of charm-quark hadronization across collision systems. In Pb–Pb collisions, they probe hadronization in the quark–gluon plasma (QGP): if charm quarks partially hadronize via recombination with (anti)strange quarks abundant in the medium, the yields of charm–strange hadrons should be enhanced relative to non-strange charm hadrons compared with proton–proton (pp) collisions. Further insight comes from excited charm–strange mesons, which decay to both strange and non-strange ground-state D mesons.
This contribution presents a comprehensive measurement of the $\mathrm{D_s^+/D^+}$ production ratio from low-multiplicity pp collisions at $\sqrt{s}=13.6$ TeV to high-multiplicity Pb–Pb collisions at $\sqrt{s_\mathrm{NN}}=5.36$ TeV. The ratio shows a smooth evolution with system size and a significant enhancement in Pb–Pb relative to pp collisions. The first $p\mathrm{_T}$-differential production cross sections of the orbitally excited $\mathrm{D_{s1}(2536)^+}$ and $\mathrm{D_{s2}(2573)^{*+}}$ mesons in pp collisions at $\sqrt{s}=13.6$ TeV is also reported, together with their production ratios to the $\mathrm{D_s^+}$ ground state. Finally, the first measurement of $\Xi\mathrm{_c^0}$ production in Pb–Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV is presented, including yield ratios to strange and non-strange charm mesons and baryons in central and semicentral events.

Speaker: Ran Tu (Fudan University (CN))

ICHEP20260731_RanTu.pdf

10:00 AM In-medium modification of azimuthal correlations of charm mesons and charged particles in light- and heavy-ion collisions with ALICE

Heavy quarks are predominantly produced in initial hard-scattering processes. They serve as effective probes of the quark–gluon plasma (QGP) expected to form in heavy-ion collisions, as they traverse and interact with the constituents of the medium throughout its evolution. In these collisions, the measurement of the angular correlations of charm mesons with charged hadrons provides insights into the interplay between parton energy loss in the medium and hadronisation mechanisms.

In this contribution, we present the measurement of the azimuthal correlation of prompt D$_{\rm s}^{+}$ and D$^{+}$ mesons with charged hadrons (D$_{\rm s}^{+}$--h, D$^{+}$--h ) in OO and Pb--Pb collisions. These measurements provide a multidifferential characterisation of the charm hadronisation process and new insights into the structure of charm jets emerging from the QGP. A comparison between the two mesons allows us to study the different properties of charm jets when charm hadronises in medium to a strange rather than a non-strange hadron. In addition, the azimuthal correlation distributions of heavy-flavour hadron decay electrons with charged hadrons in pp, p--Pb, and Pb--Pb collisions will be reported to investigate possible medium-induced modifications. The results are compared to Monte Carlo simulations to provide further constraints on charm and beauty fragmentation and hadronisation models.

Speaker: Ravindra Singh (Universita e INFN, Padova (IT))

ICHEP2026Ravindra2.pdf

8:30 AM → 10:15 AM Astroparticle Physics and Cosmology

Convener: Prof. Miguel Mostafa

8:30 AM Properties of Cosmic Beryllium Isotopes Measured by the Alpha Magnetic Spectrometer

Beryllium nuclei in cosmic rays are expected to be secondaries produced by the fragmentation of primary cosmic rays during their propagation in the Galaxy, and their fluxes contain essential information on cosmic-ray propagation and sources. Owing to the radioactive decay of $^{10}Be$ to $^{10}B$ with a half-life comparable to the cosmic-ray residence time in the Galaxy, the $^{10}Be/^{9}Be$ ratio provides unique sensitivity to the size of the Milky Way cosmic-ray propagation volume, a key parameter underlying the interpretation of secondary cosmic-ray fluxes. Prior to this study, measurements of the $^{10}Be/^{9}Be$ ratio were restricted to kinetic energies below 2 GeV/n and were affected by large uncertainties, while the individual fluxes of $^7Be$, $^9Be$, and $^{10}Be$ were measured only below 0.4 GeV/n. We present measurements of the $^7Be$, $^9Be$, and $^{10}Be$ fluxes and their ratios over the energy range from 0.6 GeV/n to 18 GeV/n, where improved experimental precision contributes to a more accurate determination of the propagation volume. The measurements are based on 14.5 years of data collected with the Alpha Magnetic Spectrometer on board the International Space Station.

Speaker: Liankun Zou (Shandong Institute of Advanced Technology (CN))

Be_Isotope.pdf

8:45 AM Unique Properties of 14.5-Year Positron and Electron Spectra measured by AMS

We present the continuous daily electron and positron spectra from 1 to 42 GeV. These unique data provide critical information to the understanding of the propagation of the same mass but opposite charge particles in heliosphere. The characteristics of the data can not be explained by current theoretical models.

Speaker: Zetong Sun (Chinese Academy of Sciences (CN))

ICHEP_ZetongSun_ele_pos_time.pdf

9:00 AM Unique Properties of the 3rd Group of Cosmic Rays measured by the Alpha Magnetic Spectrometer

Cosmic Nitrogen, Sodium, and Aluminum nuclei are a combination of primaries, produced at cosmic-ray sources, and secondaries resulting from collisions of heavier primary cosmic rays with the interstellar medium. We present high statistics measurements of the N, Na and Al rigidity spectra. We discuss the properties and composition of their spectra and present a model-independent determination of their primary and secondary components, together with the mostly primary cosmic rays C, Ne, Mg, and S. This allows us to determine the C/O, N/O, Ne/Si, Na/Si, Mg/Si, Al/Si, and S/Si abundance ratios at the source independent of cosmic ray propagation.

Speaker: Hengyi Cai (Chinese Academy of Sciences (CN))

3rdGroup_ICHEP_2026.pdf

3rdGroup_ICHEP_2026.pptx

9:30 AM Properties of Cosmic Lithium Isotopes Measured by the Alpha Magnetic Spectrometer

We present the first measurement of cosmic-ray fluxes of $^6$Li and $^7$Li isotopes in the rigidity range from 1.9 to 25 GV. The measurements are based on 0.97 million $^6$Li and 1.04 million $^7$Li nuclei collected by the Alpha Magnetic Spectrometer (AMS) on the International Space Station from May 2011 to October 2023. We observe that over the entire rigidity range the $^6$Li and $^7$Li fluxes exhibit nearly identical time variations and above ~4 GV, the time variations of $^6$Li, $^7$Li, He, Be, B, C, N, and O fluxes are identical. Above ~7 GV, we find an identical rigidity dependence of the $^6$Li and $^7$Li fluxes. This shows that they are both produced by collisions of heavier cosmic-ray nuclei with the interstellar medium and, in particular, excludes the existence of a sizable primary component in the $^7$Li flux.

Speaker: Yao Chen (Shandong Institute of Advanced Technology (CN))

QiYan_YaoChen_AMS_PClArKCa.pdf

YaoChen_ICHECP2026_AMS-Li-Isotopes.pdf

9:45 AM Unique Features of 14.5-Year Anti-Proton Spectrum measured by AMS

Information of time variations of the anti-proton spectrum is very limited. We present the continuous 14.5 year measurements of cosmic ray anti-protons spectrum from 1 to 42 GV. The measured antiproton spectrum time variations are distinctly different from electrons, positrons, and protons. This provides unique information to the understanding of heliosphere physics.

Speaker: Dr Hsin-Yi Chou (Academia Sinica (TW))

ICHEP_pbar_HYChou_final.pdf

10:00 AM Unique Properties of Primary and Secondary Cosmic Rays measured by the Alpha Magnetic Spectrometer

We present accurate measurements of primary cosmic rays Proton, Helium, Carbon, Oxygen, Neon, Magnesium, Silicon, Sulfur, Iron and Nickel as well as measurements of the secondary cosmic rays Lithium, Beryllium, Boron and Fluorine. The unexpected rigidity dependence of the secondary cosmic ray fluxes and their ratios to the primary cosmic rays such as Li/C, Be/C, B/C, Li/O, Be/O, B/O, F/Si are discussed.The data shows that there are only two classes of primary elements and two classes of secondary elements.

Speaker: Jack Henry Bolster (Massachusetts Inst. of Technology (US))

ICHEP-JackBolster.pdf

8:30 AM → 10:15 AM Detectors for Future Facilities, R&D and Novel Techniques (including Quantum Sensors)

Conveners: Antonio Vilela Pereira (CBPF - Brazilian Center for Research in Physics (BR)), Felix Reidt (CERN)

8:30 AM PLATON: high-resolution 3D photographs of particles interacting in a monolithic scintillating volume

High-spatial resolution scintillator detectors can achieve very precise particle tracking capability, when owing to a segmentation of a few hundred micrometer.
However, the required granularity comes with the price of additional complexity in the detector manufacturing and construction as well as in the huge number of readout channels, when scaling up to large-volume systems.
In arXiv:2511.09442, we proposed the PLATON concept, a change of paradigm that consists of combining the concept of plenoptic imaging with Single-Photon Avalanche Diode (SPAD) array imaging sensors to obtain 3D images of particle interactions in an unsegmented monolithic volume of scintillator.
Applications can range from neutrino detection to particle calorimetry.
In this talk we present the first-ever built plenoptic camera instrumented with a SPAD array sensor as well as newly developed analytical and artificial intelligence-based 3D imaging techniques.
The performance achieved in imaging $^{90}$Sr electron as well as two-photon absorption laser events in plastic scintillator will be reported.
Finally, the case study of accelerator neutrino detection with a realistic optical simulation, including the scalability of this technology to the tonne-scale, will demonstrate the unique potential of this novel technology, with a spatial resolution down to a few hundred micrometres.

Speaker: Davide Sgalaberna (ETH Zurich (CH))

PLATON.pdf

8:45 AM LiquidO for Precision Imaging: Results from a Multi‑Layer Opaque‑Scintillator Detector

LiquidO is a novel scintillator based detection concept that achieves intrinsic spatial segmentation through stochastic light confinement in an opaque medium. Scintillation light is strongly scattered within sub millimetre lengths, remaining near its production point and enabling efficient collection by a dense lattice of wavelength shifting fibres coupled to silicon photomultipliers.
This work presents the performance evaluation of a planar LiquidO prototype instrumented with 256 fibres. The detector comprises eight fibre layers arranged in two orthogonal directions with 5 mm pitch, with dual ended readout. Its 1.5 litre active volume is filled with a wax based opaque scintillator featuring a sub millimetre scattering length. Cosmic ray muons traversing the detector generate the characteristic LiquidO “light cylinder,” allowing clear event identification and accurate reconstruction of track position and direction.
Building on earlier results from a 3 cm cube prototype that achieved sub millimetre resolution in one dimension, this detector extends LiquidO imaging studies to three dimensions and larger volumes. The results reported here demonstrate the scalability and robust imaging capabilities of LiquidO, supporting its potential for applications in reactor monitoring, cosmic ray imaging, non proliferation, and astrophysical instrumentation, and contribute to ongoing development within the LiquidO consortium.

Speaker: Dr Thiago Bezerra (University of Sussex)

20260730_liquido_tile_ichep26_thiago_v1.pdf

9:00 AM DSTAR: a modular 4π muon detector for field operation and low-background site characterization

Low-background experiments are strongly affected by the cosmic-ray muon background, commonly characterized in terms of meters of water equivalent (m.w.e.). Direct measurements of the effective overburden in natural environments, particularly in water, remain limited and are often restricted in angular coverage.

We present DSTAR, a compact modular 4π muon detector composed of paired scintillator–SiPM modules with dedicated DAQ and slow control, arranged in reconfigurable three-dimensional geometries. In its full configuration, the detector forms a near-spherical modular geometry providing full solid-angle (4π) coverage. The detector architecture is easily scalable. The DSTAR is portable, enabling rapid deployment and long-term autonomous field operation in different natural and experimental environments.

A 14-module prototype has been operating at the Kalinin Nuclear Power Plant since October 2025, providing continuous muon background monitoring for background rejection in a neutrino experiment and demonstrating stable long-term performance. Based on the prototype results, the system has been scaled to a 64-module configuration. The full-scale detector is prepared for underwater deployment at Lake Onega for direct measurements of the effective water-equivalent depth up to 30 m. The modular design provides a flexible platform for site characterization of future low-background facilities and, in the longer term, for near-surface muon radiography and tomography.

Speaker: Aleksei Kuznetsov (JINR, Joint Institute for Nuclear Research, Dubna)

ICHEP_v7_DSTAR_Kuznetsov.pptx

9:15 AM CRE4AT detector framework: A compact and autonomous scintillating detector for cosmic ray and atmospheric observation.

A comprehensive understanding of climate processes in the Earth's atmosphere is fundamental to the development and maintenance of reliable weather forecasting models. In this context, the Brazilian Centre for Physics Research launched CRE4AT (Cosmic Ray Experiment for Atmosphere) to investigate correlations between cosmic radiation activity and cloud formation dynamics.

The implementation of CRE4AT’s scientific program led to the development of a compact detection framework designed for stable, uninterrupted, and autonomous operation in remote and harsh environments, such as the Antarctic cryosphere and the Amazon rainforest.

This framework comprises custom battery-powered electronics engineered for precise and accurate acquisition of cosmic radiation data, together with multiple environmental parameters for correlational analysis. AI-enhanced sky imaging, meteorological sensors, and hardened telemetry systems are integrated with a portable scintillation-based particle counter.

This contribution describes the instrument design, the integration of particle physics detection techniques with atmospheric sensing methodologies, and presents preliminary results on system performance.

Speaker: Andre Massafferri Rodrigues (CBPF - Brazilian Center for Physics Research (BR))

Talk_Massafferri_ICHEP_2026.pdf

9:30 AM Understanding of the correlated noise in SiPMs

A Cosmic Muon Veto detector (CMVD) is being set up at TIFR for the feasibility study of
atmospheric neutrino experiment at the shallow depth.
The commissioning work of this CMVD on top of the 12 layer RPC stack at TIFR is being done
using four layers of extruded plastic scintillators with embedded WLS fibers and the SiPM as a photo-transducer.
The target goal of the CMVD is of efficiency more than 99\% in each layer and a fraction of false veto
less than $10^{-5}$. A good understanding of the noise rate of the SiPM is crucial to achieve this goal.
Though Hamamatsu SiPM (S13360-2050VE) is used for the CMVD system, different varieties of SiPMs from
different vendors of sizes $2\,mm\times 2\,mm$, $3\,mm\times 3\,mm$ $4\,mm\times 4\,mm$ and
$6\,mm\times 6\,mm$ are tested to understand the various types of correlated and uncorrelated noise
properties of SiPMs. A comprehensive study of these noise rates at different over voltages and temperatures
of a few SiPM from different foundries as well as size will be presented in the paper.

Speaker: Gobinda Majumder (Tata Institute of Fundamental Research (IN))

ichep20266_sipm_noise_tifr.pdf

10:00 AM International Large Detector for a future e+e- collider

The International Large Detector (ILD) is proposed as a detector concept for an experiment in a linear collider (ILC/LCF) as well as in the FCC-ee circular collider. The detector concept has been optimized for precision physics in a range of energies from 90~GeV to the top threshold and above. ILD features a high precision, large volume combined silicon and gaseous tracking system, together with a high granularity calorimeter, all inside a central solenoidal magnetic field. The use of an extremely low-mass, three-dimensional tracking system is one of the ILD's key features. The particle flow paradigm has been the main overall guiding principle in the design of ILD, resulting in an extremely granular and hermetic detector. While originally developed and optimized for a linear collider, the ILD concept is being adapted and optimized for operation in the FCC-ee circular collider. In addition to completing a full simulation based on key4hep, ILD is following a strategic R&D plan to demonstrate the feasibility of most of the subdetector's key components and technologies suitable for application at future linear and circular e+e- colliders.

Speaker: Prof. Toshinori Mori

ILD_mori_v2_r.pdf

8:30 AM → 10:15 AM Artificial Intelligence, Machine Learning and Quantum Computing in HEP

Convener: Prof. Ying-Ying Li (IHEP)

8:30 AM Machine-learning based low-energy triggers for water Cherenkov neutrino detectors

One of the aims of large water Cherenkov neutrino experiments like Hyper-Kamiokande (Hyper-K) experiment is to detect low energetic neutrinos to allow studies in the solar and supernova sector. This requires pattern recognition of very faint signals on top of the inevitable background noise. Such developments have to begin already at the stage of data acquisition, where Hyper-K is targeting neutrino energies down to 3 MeV. The fully software-based trigger suite provides a good basis for this, allowing to apply an array of different triggers to target different signals. This talk will describe two machine-learning based trigger approaches aimed at the Hyper-K far detector: a supervised transformer encoder, and an unsupervised anomaly-detection method trained purely on detector noise. We describe details of the two models and show performance estimates for trigger efficiencies as well as runtimes on GPU and CPU. Both approaches show promising gains relative to standard non-ML trigger algorithms: the supervised transformer significantly improves low-energy signal efficiency, and the noise-trained anomaly-detection method also performs competitively and exceeds some conventional trigger strategies.

Speakers: Katharina Lachner (ETH Zurich (CH)), Dr Saul Alonso Monsalve (ETH Zurich)

ichep_trigger_nn_for_water_Cherenkov_detectors_vfin-2.pdf

8:45 AM Masked Autoencoder Pre-trained Transformers for Pulse-Shape Discrimination in HPGe Detectors

Pulse-shape discrimination (PSD) in point-contact high-purity germanium (HPGe) detectors is a primary handle for background rejection in neutrinoless double-beta decay searches. Standard analyses reduce each waveform to a few engineered scalars (e.g.\ AvsE, delayed-charge recovery (DCR) and late charge (LQ)), potentially discarding information in the full time series. We benchmark end-to-end transformer models on 3,800-sample charge waveforms from the Majorana Demonstrator AI/ML data release. The model ingests the waveform and a simple current proxy (finite-difference derivative) and is trained multi-task to reproduce accept/reject labels for low/high AvsE, DCR and LQ, and to regress calibrated energy. Transformers outperform a gradient-boosted decision tree using 12 geometric features, achieving AUROC $>0.92$ for each label and the largest gains for DCR and LQ. For the combined PSD-pass label (passing all four selections), the fine-tuned transformer reaches AUROC $0.992$ versus $0.958$ for the feature baseline. Masked autoencoder pre-training on unlabeled waveforms improves sample efficiency, reducing labeled-data needs by $\sim 2$-$4\times$ in low-label regimes. These gains make the approach promising for future HPGe programs such as LEGEND, where scalable, transferable PSD is critical; ongoing work targets robustness across detectors, conditions and the $0\nu\beta\beta$ region of interest.

Speaker: Marta Babicz (University of Zurich (CH))

MBabicz_ichep26.pdf

MBabicz_ichep26.pptx

9:00 AM Dr.Sai: An LLM-Powered Multi-Agent System for Autonomous Physics Analysis at BESIII

We present Dr.Sai, a novel multi-agent system powered by large language models (LLMs), designed to automate full-chain physics analysis at the BESIII experiment. The system directly interprets a physicist's natural language query (e.g., "Measure the J/ψ mass spectrum and branching ratio"), autonomously decomposes it into structured subtasks (data skimming, fitting, etc.), and orchestrates the generation and execution of corresponding code. Specialized agents manage workflow planning, scientific code generation, job submission to computing clusters, and result validation, creating a closed-loop, reproducible analysis pipeline.
Benchmark tests on established BESIII processes, such as J/ψ decays, demonstrate the system's practical reliability. Dr.Sai successfully completed multiple, distinct end-to-end analyses, achieving an overall workflow success rate exceeding 90%. This work provides a concrete, scalable blueprint for "AI scientists" in experimental HEP. It showcases a transformative shift from AI as a tool to an autonomous partner, significantly accelerating analysis cycles and enabling scalable exploration of complex data. We discuss the integration of this agentic framework within IHEP's computing ecosystem and its potential to redefine collaborative human-AI discovery in particle physics.

Speakers: Beijiang Liu, Changzheng YUAN, Dr Ke Li (Institute of High Energy Physics, Chinese Academy of Sciences (CN)), Zhengde Zhang (中国科学院高能物理研究所)

BJLiu_ICHEP2026.pdf

9:15 AM From bins to flows: a neural network approach to unbinned data-simulation corrections for CMS

Precise simulation-to-data corrections, encapsulated in scale factors, are crucial for achieving high precision in physics measurements at the CMS experiment. Traditional methods often rely on binned approaches, which limit the exploitation of available information and require a time-consuming fitting process repeated for each bin. This work presents a novel approach utilizing modern probabilistic machine learning techniques to compute multivariate and unbinned scale factors for CMS objects. A PyTorch-based likelihood function is developed, incorporating Normalizing Flows for signal and background distributions from simulation, and for conditional kinematic variable modeling. Neural networks are employed to parametrize data-simulation discrepancies such as detector efficiencies and variable transformations. Continuous scale factors are obtained by performing an unbinned maximum likelihood fit on data. Minimizing binning biases and improving scale factor representation, these machine learning methods exploit more observables and their correlations, with the potential to improve physics results precision.

Speaker: Davide Valsecchi (ETH Zurich (CH))

26_07_31 - ICHEP - TagAndFlow-v2.pdf

9:30 AM ACTS and Machine Learning for Phase-II ATLAS Muon Reconstruction

The High-Luminosity LHC (HL-LHC) will operate with pile-up levels of up to μ≃ 200, significantly increasing the trigger and reconstruction challenge for the ATLAS experiment due to high detector occupancies and background activity. To meet the stringent computing budget and physics-performance requirements, ATLAS is migrating tracking to the experiment-agnostic A Common Tracking Software (ACTS) framework and exploring machine-learning techniques to reduce the combinatorial load prior to pattern recognition. This contribution presents a prototype standalone muon reconstruction chain for HL-LHC conditions, implemented in the ATLAS reconstruction software stack and integrated into the Event Filter using ACTS-based components. The chain includes space-point formation, Hough-transform pattern recognition in η and ϕ, straight-line segment reconstruction with dedicated treatment of MDT left--right ambiguities, and segment-seeded track building with a global χ2 fit in the inhomogeneous magnetic field. In simulation and in the Run-3 trigger environment, the chain achieves high efficiency and excellent angular and momentum resolution, while delivering a substantial CPU performance improvement over the legacy pipeline. To further reduce background-driven compute cost, a Graph Neural Network filter operating on space-point graphs is introduced, rejecting over 96 % of background-only regions while retaining more than 99% of muon candidates.

Speaker: Davide Di Croce (CERN)

ICHEP2026-AtlasMuonSoftware

9:45 AM Machine Learning Techniques for Electron and Photon Triggering in ATLAS

The increasing instantaneous luminosity and pile-up at the Large Hadron Collider impose stringent constraints on the online reconstruction and selection of electrons and photons in the ATLAS High-Level Trigger (HLT). To address these challenges, machine learning techniques are being integrated at multiple stages of the electromagnetic trigger sequence, from early energy reconstruction to object identification. This contribution reports recent advances across the HLT electron and photon reconstruction chain. A gradient-boosted decision tree-based energy calibration using calorimeter ring information has been developed for the FastCalo step, improving energy resolution while remaining pile-up robust and computationally efficient. The NeuralRinger algorithm, based on calorimeter rings, has been deployed early in the trigger sequence, enabling efficient background rejection for photons and significant rate reductions at high transverse energies. In parallel, new electron identification strategies combining calorimeter and tracking information in neural networks show improved background rejection relative to the current online selection. First studies of deep neural network–based electron identification at the HLT are also presented, compared with the established likelihood-based approach and deployment challenges. Together, these results demonstrate a coherent machine-learning-driven strategy to enhance the performance and scalability of electron and photon triggering in ATLAS for the High-Luminosity LHC era.

Speaker: Prof. Eduardo Furtado De Simas Filho (UFBA)

ICHEP - Machine Learning Techniques for Electron and Photon Triggering in ATLAS_Final.pdf

10:15 AM → 10:45 AM Coffee break

10:45 AM → 12:30 PM Neutrino Physics

Conveners: Cristovao Vilela (Laboratory of Instrumentation and Experimental Particle Physics (PT)), Shirley Li (UC Irvine)

10:45 AM ND280++, the multi-ton upgrade of the magnetised near detector for the Hyper-Kamiokande high-statistics phase

Hyper-Kamiokande will start collecting accelerator neutrino data in 2028 to measure the leptonic CP violating phase, $\delta_{CP}$. The largest systematic uncertainty is related to the ratio between the $\nu_e$ and $\bar{\nu}_{e}$ cross sections, $\Delta(\sigma_{{\nu}_e}/\sigma_{\bar{\nu}_e})$, whose improper modeling could bias the measurement of $\delta_{CP}$. Sensitivity studies show that the magnetised near detector (ND280) currently operating at the T2K experiment, and the intermediate water-Cherenkov detector (IWCD) may constrain $\Delta(\sigma_{{\nu}_e}/\sigma_{\bar{\nu}_e})$ to about 4\%. Reducing this further would lead to an improvement in the sensitivity to $\delta_{CP}$. Hyper-Kamiokande is developing the conceptual design of a second upgrade of ND280, called ND280++, envisaged for the post-2030 high-statistics phase. The ND280 subdetectors operating since 2009 would be replaced with up to 10 tons of water and/or organic scintillator detectors and time projection chambers, increasing the neutrino target mass by a factor of three, with a larger water content. ND280++ will permit the collection of a high-statistics sample of $\nu_e$ and $\bar{\nu}_{e}$ interactions, the precision measurement of $\nu$ cross section in water and the high-resolution reconstruction of the hadronic final state. The ND280++ reference design, the ongoing R\&D (water-based liquid scintillator, segmented organic scintillator, scintillating fibers) and simulation studies will be presented.

Speaker: Katharina Lachner (ETH Zurich (CH))

ichep_nd280plusplus_vfin-2.pdf

11:00 AM First measurement of reactor antineutrinos at JUNO-TAO

Current discrepancies between measured reactor antineutrino spectra and theoretical models reflect an imperfect understanding of reactor antineutrino production, which introduces significant uncertainties into reactor-based neutrino oscillation experiments. The Taishan Antineutrino Observatory (TAO), a satellite detector of the Jiangmen Underground Neutrino Observatory (JUNO), has been designed to address this issue. Located approximately 44 meters from a core of the Taishan Nuclear Power Plant, TAO utilizes a ton-scale liquid scintillator detector to observe reactor antineutrinos via the inverse beta decay channel. The detector is instrumented with silicon photomultipliers (SiPMs) that provide high photon detection coverage and efficiency, yielding an exceptionally high light yield. Operating at cryogenic temperatures to suppress dark noise, TAO achieves an outstanding energy resolution. This talk will present TAO’s detector performance and its first antineutrino measurement. The results will help to reduce the flux and spectrum model uncertainties for JUNO’s determination of neutrino mass ordering and other oscillation parameters, while also serving as a key experimental benchmark for nuclear databases.

Speaker: Jianrun Hu (Sun Yat-sen University)

First Measurement of Reactor Antineutrinos at JUNO-TAO (ICHEP).pdf

11:15 AM Reconstruction of neutrino events in Hyper-Kamiokande with machine learning.

Neutrino physics is at the edge of making important measurements such as the observation of the diffuse supernova neutrino background, the upturn in the electron-flavor survival probability of solar neutrinos, and CP-violation in the lepton sector. Hyper-Kamiokande (HK) is the next generation of neutrino observatory in Japan and will be among the world’s leading experiments addressing these fundamental questions. It will rely on a 260-kton water Cherenkov detector which is currently under construction, and will begin data-taking in 2028. Using traditional likelihood-based algorithms inherited from Super-Kamiokande, HK will ensure a robust and seamless start for physics analyses. In parallel, machine learning approaches have demonstrated increasingly strong performances in recent years when applied to HK, in some cases matching or surpassing the likelihood methods. In this talk, I will present the status of machine learning algorithms developed for HK and outline their key principles. I will then report on their performances for neutrino event reconstruction variables (e.g. flavor, vertex, momentum, direction) and compare the results with those obtained using likelihood-based algorithms.

Speaker: Lorenzo Perisse

ICHEP_HK_MLreconstruction_LorenzoPerisse.pdf

11:30 AM SAND at the DUNE Near Detector Complex

The Deep Underground Neutrino Experiment (DUNE) is a next-generation neutrino oscillation long-baseline experiment with primary goals of measuring the neutrino mass ordering, the Charge-Parity(CP)-violating phase in the lepton sector of the Standard Model, and improving the precision of the key parameters that govern neutrino oscillations. The System for on-Axis Neutrino Detection (SAND) at the DUNE Near Detector complex is designed to monitor the beam on-axis, control systematic uncertainties for oscillation analyses, precisely measure neutrino cross sections, and perform short-baseline physics studies.
SAND exploits the existing KLOE electromagnetic calorimeter, composed of alternating lead/scintillating fiber layers, coupled with a 0.6 T superconducting magnet.
Most of the internal volume is occupied by the Straw Target Tracker (STT), built from modular units combining passive targets with four straw-tube planes. Multiple target materials allow neutrino interactions to be measured on different nuclei within the same detector, supporting cross-section and flux determinations and constraining nuclear effects and final-state interactions relevant for DUNE oscillation analyses. A 1-ton active target for the $\nu$-Ar interactions, called GRAIN, located in front of the tracker, is designed to image neutrino interactions using scintillation light only. In this talk, the current detector status, expected performance, and role in ND measurements are presented.

Speaker: Denise Casazza

Casazza-ICHEP2026_.pdf

11:45 AM DUNE's ND-LAr and its prototyping program

The Deep Underground Neutrino Experiment (DUNE) is a next-generation long-baseline neutrino oscillation experiment designed to make measurements of neutrino oscillations with high precision and probe for new physics. Neutrinos will be measured at two detector facilities, namely a Near Detector (ND) located at Fermilab close to where the neutrino beam is produced by the Long-Baseline Neutrino Facility (LBNF), and a Far Detector located 1300 km away at the Sanford Underground Research Facility (SURF). The ND will play a crucial role in measuring the unoscillated neutrino flux, which is needed to constrain systematic uncertainties for precisely measuring neutrino oscillation parameters and determining the neutrino mass ordering. We focus on the liquid argon (LAr) component of the ND, which will be an array of 7x5 LAr time projection chambers (LArTPCs) that will detect particles from their ionisation charge deposits and scintillation light signals using novel 3D pixel and high-coverage light readout systems, respectively. We present the ND-LAr design and its related prototyping campaigns, which include data-taking with the NuMI neutrino beam at Fermilab.

Speaker: Thomas Murphy (Fermi National Accelerator Laboratory)

DUNE's ND-LAr and its prototyping program-2.pdf

12:00 PM The NOvA Test Beam Program

The NOvA (NuMI Off-Axis electron neutrino Appearance) Experiment is a long-baseline neutrino oscillation experiment composed of two functionally identical detectors, a 300 ton Near Detector, and a 14 kton Far Detector separated by 809 km and placed 14 mrad off the axis of the NuMI neutrino beam created at Fermilab. This configuration enables NOvA's rich neutrino physics program, which includes measuring neutrino mixing parameters, determining the neutrino mass hierarchy, and probing CP violation in the leptonic sector. The NOvA Test Beam experiment deployed at Fermilab between 2018 and 2022 used a scaled-down 30 ton detector to analyse tagged beamline particles. The beamline selected and identified electrons, muons, pions, kaons, and protons with momenta ranging from 0.4 to 1.8 GeV/c, as understanding how the detector responds to these particles found in the final state of neutrino interactions is crucial. In this talk, we will describe the highlights and challenges of the NOvA Test Beam program, and present preliminary results from studies of particle response in the NOvA Test Beam detector.

Speaker: Dr Thiago Bezerra (University of Sussex)

20260731_nova_test_beam_ichep26_thiago_v2.pdf

10:45 AM → 12:30 PM Dark Matter

Convener: Yoxara Sánchez-Villamizar (LPTHE - CNRS - Sorbonne Université)

10:45 AM The Physics of Fermionic Portal to Vector Dark Matter

We present the key features of Fermionic Portal Vector Dark Matter (FPVDM) models based on an extended dark $SU(2)_D$ gauge symmetry. The dark sector communicates with the Standard Model exclusively through vector-like fermions via Yukawa interactions, without relying on kinetic mixing or the Higgs portal, and predicts a stable vector dark matter candidate protected by a $Z_2$ symmetry.

A particularly well-motivated case is the muonic portal (MPVDM), where vector-like muons link the dark and visible sectors. This scenario can reproduce the observed dark matter relic abundance and accommodate the muon anomalous magnetic moment under both the tension'' andcompatibility'' interpretations of recent $(g-2)_\mu$ measurements. A key ingredient is a generic off-resonance velocity suppression mechanism that allows light (sub-GeV) vector dark matter to evade CMB constraints without fine tuning.

We also discuss a top-portal realisation with vector-like top partners, leading to complementary signatures at colliders and in dark matter searches. In addition, the spontaneous breaking of $SU(2)_D$ can proceed through a strong first-order phase transition in well-defined regions of parameter space, giving rise to potentially observable stochastic gravitational-wave signals. FPVDM models therefore predict correlated signatures across dark matter, collider, and gravitational-wave experiments.

Based on arXiv:2510.18564, arXiv:2508.04912, arXiv:2203.04681, and arXiv:2204.03510.

Speaker: Prof. Alexander Belyaev (University of Southampton & Rutherford Appleton Laboratory)

Belyaev-FPVDM-ICHEP2026.pdf

11:00 AM Vector dark matter with non-abelian kinetic mixing

An appealing framework for dark matter is provided by light hidden sectors, below the electroweak scale, feebly coupled to the Standard Model via light mediators. We consider a minimal, predictive model where both the dark matter and the mediator are vector bosons, and have the same mass. The portal between the dark sector and the Standard Model is provided by a kinetic mixing between the dark gauge symmetry, $SU(2)_X$, and the hypercharge, $U(1)_Y$, induced by a dimension-six operator. The dark-matter candidates, $X^\pm$, are charged under a custodial symmetry and therefore stable, while the mediator is a massive dark photon, $Z_D$, mixing with the photon and the $Z$. We show how the observed dark-matter abundance can be reproduced via freeze-out or freeze-in, through either the kinetic mixing or the dark gauge interaction. We also analyse dark 3-to-2 annihilations, that can become dominant in model variations with $Z_D$ heavier than $X^\pm$. We confront our relic-density predictions with current and projected experimental, astrophysical and cosmological bounds on the model parameter space, highlighting the correlation between the dark-photon and dark-matter phenomenologies.

Speaker: Ana Luisa Foguel da Silva (Universidade de São Paulo)

non_abelian_VDM_KM_ICHEP_pdf.pdf

11:15 AM Opening the Parameter Space of sub-GeV Inelastic Dark Matter through Parity Violation

Sub-GeV dark matter has emerged as a compelling alternative to the WIMP paradigm, motivated by persistent null results in conventional searches. However, s-wave annihilating candidates in this mass range are severely constrained by indirect-detection bounds. Inelastic dark matter scenarios provide a natural way to evade these limits, especially when the excited state is long-lived. In this talk, I present a detailed study of pseudo-Dirac inelastic dark matter interacting through a dark photon, emphasizing the phenomenological impact of parity-violating interactions.

Parity violation generically induces small diagonal couplings that significantly alter the late-time population of excited states. A precise determination of this population is therefore essential to reliably assess experimental constraints. To this end, I solve the integrated Boltzmann equation governing the excited-state fraction, consistently accounting for up- and down-scattering with electrons, dark sector conversion processes, and the thermal evolution of the dark sector.

Using the resulting excited-state abundance, I revisit constraints from indirect detection, direct detection, self-interactions, and collider searches. I show that parity-violating interactions can reopen wide regions of parameter space that are otherwise excluded in parity-conserving scenarios, particularly for keV–MeV mass splittings. I also discuss the prospects for probing these models at future experiments, highlighting the sensitivity of LDMX.

Speaker: Javier Silva Malpartida (PONTIFICIA UNIVERSIDAD CATÓLICA DEL PERÚ)

ichep_2026_jsm.pdf

ichep_talk.pdf

11:30 AM WIMP relic abundance under Tsallis statistics

The standard cosmological paradigm relies on Weakly Interacting Massive Particle (WIMP) freeze-out occurring in a primordial plasma described by the (standard) Boltzmann-Gibbs statistics. However, complex high-energy plasmas may exhibit long-range correlations or memory effects better described by nonextensive statistical mechanics. This work presents a model-independent generalization of thermal WIMP freeze-out using the nonextensive Tsallis statistics, characterized by the entropic parameter $q$. In this scenario, the value of $q$ controls the departure from the standard case ($q = 1$).
We analyze over WIMP mass and annihilation cross-sections, benchmarking our results against the Planck relic density measurement ($\Omega_c h^2 =0.120 \pm 0.001$). We identify clear degeneracies in the parameter space, suggesting that regions of WIMP parameter space currently considered excluded or fine-tuned under standard assumptions may be reopened when nonextensive effects in the radiation bath are consistently accounted for. This framework provides a motivated pathway to reassess the viability of WIMP-like scenarios in light of increasingly tight experimental constraints.

Speaker: Prof. Roberto A. Lineros (Departamento de Física, Universidad Católica del Norte, Antofagasta, Chile)

2026-jul-lineros-ichep.pdf

11:45 AM Glueball Dark Matter under Precision Control: Relic Abundance, Portals, and Direct Detection

Confining dark sectors offer a minimal and predictive route to composite dark matter (DM). I connect nonperturbative glueball physics to cosmological evolution and to laboratory searches. Using lattice-calibrated thermodynamics, we revisit the relic abundance of stable scalar glueballs and show that strong-coupling effects can shift standard abundance estimates by up to an order of magnitude, yielding a robust mapping between the confinement scale and the observed DM density (including its dependence on the dark-to-visible temperature ratio). We then show how heavy-fermion portals can naturally suppress electromagnetic couplings of composite states, opening broad viable parameter space for heavy glueball/axion-like DM. Finally, I present new results for C-odd vector glueball (''oddball'') DM coupled to photons via light electrically charged vector-like fermions portal, namely, its coherent nuclear scattering dominated by two off-shell photons. Matching an EFT to nonperturbative glueball form factors predicts a steep scaling, $\sigma_{\rm SI}\propto \Lambda_D^{2.15} m_\psi^{-8}$, so current and next-generation xenon detectors probe a distinctive light-portal window with $\Lambda_D \sim$ sub-GeV - few GeV and $m_\psi \sim$ few - tens of GeV, compatible with collider and precision constraints.

Speaker: Roman Pasechnik (Lund university)

ICHEP26_Pasechnik_Glueball.pdf

10:45 AM → 12:30 PM Education & Outreach

Convener: Prof. Freya Blekman (Deutsches Elektronen-Synchrotron (DE))

10:45 AM Early Morning Coffee at CERN – A podcast by scientists at CERN about the science of CERN

In 2024 we initiated a pilot podcast at CERN to explore the platform as a means not only to inform and educate, but to engage the public by bringing them into our world. With more than half a billion podcast listeners in the world today, there is a potential not only to reach new, diverse audiences, but also to gain their trust by welcoming them into our conversation and sharing the human stories behind the research. The podcast team created a partnership between members of CERN Education, Communication and Outreach (ECO) and the scientists and engineers of the CERN experiments. Over several months we recorded podcasts covering a variety of topics, including Antimatter, the Higgs boson, Dark matter, and have interviewed a variety of guests, from early-career researchers to collaboration spokespersons, spanning different backgrounds and nationalities. This diversity has strengthened the authenticity of the podcast by showcasing CERN’s creative and human side. We present successes, challenges and lesson learned, then discuss future plans to expand the series beyond CERN.

Speaker: Steven Goldfarb (University of Melbourne (AU))

Goldfarb-EMC2-20260731.pdf

Goldfarb-EMC2-20260731.pptx

11:00 AM Big Bang Stage at Colours of Ostrava

The Big Bang Stage is a large-scale science outreach initiative embedded within the Colours of Ostrava music festival in Czech Republic, one of Central Europe’s major cultural events. Its mission is to popularize physics, science and technology among young and non-traditional audiences by bringing cutting-edge research directly into a vibrant festival environment. During the four festival afternoons, the stage including hands-on open air activities attracts up to 5,000 visitors, making it one of the most attended science-focused activities at the event. The program combines accessible talks, interactive demonstrations, moderated discussions, science shows, and multimedia performances that connect fundamental physics to everyday life, technology, and society. The project is organized in collaboration of CERN, Czech universities, Czech Academy of Sciences and the Science and Technology Centre Svet techniky Dolni Vitkovice. It is one of many stages produced in music festivals all over the world, as part of the CERN Festival Programme and the Big Bang Collective. Communicating particle physics, among the other topics, to broad audiences is particularly important in the context of preparing the next generation of large international projects, such as the Electron–Ion Collider in the USA and the Future Circular Collider at CERN.

Speaker: Jaroslav Bielcik (Czech Technical University in Prague (CZ))

BigBangStage_ICHEP_v4_video.pdf

11:15 AM Bridging the HECAP Training Gap in Latin America

High-energy and astroparticle physics require long, integrated training that combines theory, advanced computing, detector instrumentation, and collaboration within large international experiments. Effective education, therefore, must connect graduate training to real research tasks, strong mentorship, and transferable skills such as software development, data analysis, electronics, and reproducible workflows, all of which are valuable beyond academia.
Although Latin American universities host strong research groups, the region faces major inequalities in access to funding, infrastructure, laboratories, and stable early-career positions. These limitations fragment training, reduce research time, and contribute to brain drain, particularly where instrumentation-intensive education and international mobility are scarce. As a result, scalable and cost-effective cross-border training models are needed that can operate under heterogeneous connectivity conditions while still providing hands-on experience.
The ERASMUS+ projects LA-CoNGA Physics and EL-BONGÓ Physics address some of these challenges by integrating open e-learning resources, shared code and data repositories, and remote laboratories accessible via low-bandwidth connections. They also include a formal research apprenticeship stage that links training to vocational outcomes. Building on LA-CoNGA, EL-BONGÓ (launched in 2025) expands to Central America, develops four research-learning communities, and adds research-driven courses and a FABLab network to strengthen sustainability, local autonomy, and employability.

Speaker: Prof. José Ocariz (Université Paris Cité, France)

EL-BONGÓ_ICHEP2026.pdf

11:30 AM SCIENTIFIC INCLUSION: AN EXPERIENCE REPORT FROM THE IFRN-CNAT SCIENCE CLUB IN POPULARIZING PARTICLE PHYSICS

This paper describes the science outreach and academic training activities developed by the extension project "Scientific Inclusion: From Knowledge to the Dissemination of Particle Physics," linked to the Science Club of IFRN Campus Natal-Central. The project establishes an interface between formal/informal education and high-energy research through interinstitutional collaborations with centers of excellence such as CERN, LIP, and BNL. The activities are based on conducting MasterClasses with analysis of real LHC data, virtual visits to the ATLAS experiment, and the production of educational materials for events and digital platforms. The international dimension of the project is evidenced by the technical visit of students from the Integrated High School program to the facilities of Laboratory of Instrumentation and Experimental Particle Physics (LIP - Portugal) and European Organization for Nuclear Research (CERN - Switzerland). The results demonstrate the effectiveness of didactic transposition strategies in abstract topics, promoting scientific literacy and institutional recognition of the coordinators within INCT/CERN-Brazil. It is concluded that the articulation between basic education and cutting-edge research is a strategic tool for overcoming educational barriers and strengthening scientific culture in the national context.

Speakers: Prof. AMADEU ALBINO JR (Instituto Federal do Rio Grande do Norte - IFRN), Maria da Glória Albino

SCIENTIFIC INCLUSION - AN EXPERIENCE REPORT FROM THE IFRN-CNAT SCIENCE CLUB IN POPULARIZING PARTICLE PHYSICS.pdf

11:45 AM Communicating the High-Luminosity era of ATLAS

The High-Luminosity LHC (HL-LHC) will define the frontier of particle physics for the coming decades. For the ATLAS Collaboration, the current communication challenge lies in a dual-track approach: sustaining the impact of ongoing Run 3 physics results while pivoting the narrative toward the high-luminosity upgrade. This talk outlines a strategy and set of tools to navigate these parallel priorities, with a focus on the global human story behind the upgrade.Katar

Speaker: Katarina Anthony (CERN)

Communicating the High-Luminosity era of ATLAS - ICHEP 2026.pdf

12:00 PM ATLAS On the Air! - Measuring the Success of the ATLAS Virtual Visit Programme

Since 2010, ATLAS Virtual Visits have revolutionised HEP outreach by connecting its collaboration members with audiences worldwide. The Virtual Visit model brings inspiring scientific outreach events to visitors who would otherwise not have such an opportunity. Over the years, by offering the visits in a variety of languages and using a variety of online platforms, we have expanded their scope, engaging a broad and diverse audience, including parliaments, businesses, festivals, retirement homes, experiments, and even prisons. The visits, presented in front of the detector or the control room, stimulate audience engagement and offer excellent communication training to members of the collaboration. The programme, including its history, highlights and newly compiled statistics, has been summarised and submitted for publication to be the first peer-reviewed LHC collaboration-endorsed outreach paper. We present it here.

Speaker: Mario Campanelli (UCL)

ATL-COM-OREACH-2026-018.pdf

12:15 PM Communicating CMS physics results through public briefings

As the LHC experiments continue to produce remarkable results, it is essential to communicate them effectively to audiences beyond the scientific community. To this end, the CMS Collaboration runs a dedicated program to produce and promote "physics briefings" – short, accessible articles that translate CMS results into clear and engaging stories for a general audience.

We describe the motivation and strategy behind these briefings. We discuss the methodologies and communication techniques – such as the use of demonstrative templates and close collaboration between physicists and communication specialists – that have proven transformative in how these articles are written and disseminated. We also highlight the measurable impact these approaches have had on article quality and public engagement.

Speaker: Andreas Meyer (DESY)

CMS Briefings ICHEP26.pdf

10:45 AM → 12:30 PM Higgs Physics

Convener: Toni Sculac (University of Split Faculty of Science (HR))

10:45 AM Higgs mass, width and absolute ZH boson cross section at FCC-ee

The FCC-ee programme is uniquely positioned to provide unprecedented precision on the fundamental properties of the Higgs boson. At the center-of-mass energies 240 and 365 GeV, the FCC-ee will produce millions of Higgs bosons via Higgs-strahlung and vector boson fusion. The clean experimental environment allows a model-independent measurement of the absolute ZH cross-section to better than per-mil accuracy, directly determining the Higgs coupling to Z bosons. Utilizing the recoil-mass technique in leptonic and hadronic Z decays, the Higgs boson mass will be measured with a precision of a few MeV. Combining these measurements with precise determinations of exclusive branching ratios will yield the total Higgs width at percent-level precision. These measurements will significantly advance our understanding of the Standard Model and guide the search for new physics.

Speaker: Sofia Giappichini (KIT - Karlsruhe Institute of Technology (DE))

ICHEP26_HiggsFCCee.pdf

11:00 AM Cross section measurements at CMS, bosonic channels

We will discuss the latest differential measurements of Higgs boson cross sections with the CMS detector in bosonic decay channels. Both fiducial differential cross section measurements and measurements in the simplified template cross section framework will be presented. The data collected during Run 3 of the LHC by the CMS experiment are used.

Speaker: Nico Härringer (ETH Zurich (CH))

ICHEP2026.pdf

11:15 AM Higgs property measurements at CMS

To fully characterize the Higgs boson, it is important to establish whether it presents properties that are not expected in the Standard Model of particle physics. In this talk we will present the most recent measurements from the CMS experiment of Higgs properties probing BSM effects, including anomalous couplings, CP violations, polarizations.

Speaker: Sergio Blanco Fernandez (Universidad de Cantabria and CSIC (ES))

SBlanco_ICHEP2026_HiggsProperties.pdf

11:30 AM Measurements of the Higgs boson mass and natural width with the ATLAS experiment

Both Higgs boson mass and its natural width have important physics implications. Higgs boson mass is a fundamental free parameter of the Standard Model. The measurements are performed exploiting the Higgs boson decays into two photons and four leptons, as well as their combination. Higgs boson natural width, on the other hand, reflects the sum of partial widths and is hence sensitive to new physics. It cannot be directly constrained at LHC experiments, and has to be constrained with indirect approaches such as off-shell Higgs boson production. This talk presents the measurement of both Higgs boson mass and width based on LHC Run 2 data.

Speaker: Yingjie Wei (University of Freiburg (DE))

Yingjie_WEI_HiggsMass_and_HiggsWidth_split.pdf

11:45 AM Prospects for single- and di-Higgs measurements with the ATLAS experiment at the HL-LHC

The large dataset of about 3 ab-1 that will be collected by ATLAS and CMS experiment each at the High Luminosity LHC (HL-LHC) will sharpen measurements in the Higgs sector to unprecedented precision providing important guidance to future colliders. This talk will present the prospects for Higgs and di-Higgs results with the ATLAS experiment at the HL-LHC. Extrapolation studies based on current analyses have been carried out to understand the expected precision and limitations of these measurements.

Speaker: Romain Bouquet (INFN - University of Genova (Italy))

ICHEP2026_ATLASHiggsDiHiggsHLLHCProjections_RomainBouquet.pdf

12:00 PM CPV mixing angle measurement in Higgs to ττ decays at 240 GeV CEPC

If the SM-like Higgs boson is realized as a mixture of scalar and pseudoscalar states, the CP violating mixing angle can be measured through various Higgs boson production and decay channels. Here we consider Higgs to +- decays, at 240 GeV CEPC with 5.6 ab-1 of simulated data. Preliminary projections of the absolute uncertainty of the mixing angle are given, for the Higgs boson production in Higgsstrahlung, where the primary Z0 boson decays inclusively.

Speakers: Ivana Vidakovic (VINCA Institute of Nuclear Sciences, University of Belgrade (RS)), Ivana Vidakovic (VINCA Institute of Nuclear Sciences, University of Belgrade (RS)), Ivanka Bozovic-Jelisavcic (University of Belgrade (RS))

CPV_Higgs decay to tautau_ICHEP2026 (1).pdf

CPV_Higgs decay to tautau_ICHEP2026 (1).pptx

12:15 PM Study of $HH \rightarrow bb\tau\tau$ process in ATLAS

The search for Higgs boson pair production (HH) is a key step toward probing the Higgs potential and measuring the Higgs boson self-coupling in the Standard Model. The HH → bbττ channel provides strong sensitivity thanks to its relatively large branching fraction and a background composition that can be controlled with dedicated selections. Latest ATLAS results for this search are presented in this talk.

Speaker: Gabriele D'Anniballe (Universita & INFN Pisa (IT))

GabrieleDAnniballe_ICHEP2026-15.pdf

10:45 AM → 12:30 PM Strong Interactions and Hadron Physics

Convener: Patricia Magalhaes (UNICAMP)

10:45 AM Recent jet measurements in CMS

Measurements of jet production in proton-proton collisions at the LHC are crucial for precise tests of QCD, improving the understanding of the proton structure and are important tools for searches for physics beyond the standard model. We present the most recent set of jet measurements performed using CMS data and compare them to various theoretical predictions.

Speaker: Valentina Guglielmi (University of Zurich (CH))

ICHEP26_Final.pdf

11:00 AM Unraveling QCD dynamics via charm-tagged jets with ALICE at the LHC

The study of jet substructure provides tests of Quantum Chromodynamics (QCD) and offers differential ways to study hadronization mechanisms. QCD predicts that jet radiation patterns depend on the mass and color charge of the initiating parton. Parton showers are sensitive to the different Casimir factors of quarks and gluons, and to the parton mass through the dead-cone effect.

In this talk, we present three sets of charm-tagged jet measurements, using $\mathrm D^{0}$-meson-tagged jets. The first consists of measurements of the angular differences between three different axis definitions inside the jets. The three definitions offer different sensitivity to wide-angle soft radiation and systematically probe the radiation pattern from charm quarks. The second regards jet angularities, which characterise the weighted angular distribution of the jet constituents. These powerful observables probe the parton shower, with sensitivity to parton-mass and Casimir-factor related effects that can be tuned by adjusting the importance of wide-angle radiation. Finally, we present the first measurement of the energy-energy correlator for $\mathrm D^{0}$-meson-tagged jets. This observable reveals the detailed structure of QCD radiation from heavy quarks, allowing for a distinction between perturbative and non-perturbative effects in charm-quark showers.

Speaker: Emma Rose Yeats (University of California Berkeley (US))

ICHEP 2026 (5).pdf

11:15 AM Precision jet measurements with the ATLAS experiment

Inclusive jet cross-sections measured in proton–proton collisions at a centre-of-mass energy of 13 TeV using data with an integrated luminosity of 140 fb−1 are presented. The differential cross-sections are measured as a function of several jet kinematic observables, including dijet masses up to almost 10 TeV. The results are compared with state-of-the-art NNLO full colour perturbative QCD calculations.

Speaker: Bogdan Malaescu (LPNHE-Paris CNRS/IN2P3 (FR))

ICHEP2026_Jets__Malaescu.pptx.pdf

11:30 AM Jet substructure measurements with the ATLAS experiment

Hadron collider jet measurements are sensitive probes of QCD radiation patterns. In this talk, recent measurements of the jet substructure from the ATLAS experiment are shown. A novel unfolding method is demonstrated for associated jets in Z boson production to perform the highest dimensional cross-section measurement to date. The results are presented as an unbinned data set of particle level events. In addition jet substructure measurements of non-perturbative track functions, as well as differential cross-section of Lund sub-jet multiplicities and measurements of the Lund Jet Plane in W boson and top quark pair production are presented. The results are compared to a large variety of parton shower models and tunes.

Speaker: Kevin Thomas Greif (University of California Irvine (US))

kgreif_ichep_slides.pdf

11:45 AM Heavy flavour jet measurements with the ATLAS experiment

New measurements of vector boson production in association with heavy flavour jets are presented. The cross sections are sensitive to heavy flavour quarks in the initial state, and test heavy quark production models. The data are compared to QCD predictions, and will improve the understanding of important backgrounds in searches for new physics and Higgs boson production.

Speaker: Ulla Blumenschein (University of London (GB))

Ichep_UBlumenschein.pdf

12:00 PM Studies of jet substructure and fragmentation at LHCb

Jet-substructure observables provide powerful probes of Quantum Chromodynamics, offering detailed access to parton-shower evolution, colour coherence, and hadronization in vacuum. The LHCb detector, with its forward acceptance and excellent tracking and vertexing performance, enables measurements of jet structure at low and moderate transverse momentum in a kinematic region complementary to the central LHC experiments. Using pp collisions at \sqrt{s} = 13 TeV, LHCb has established a broad programme of substructure measurements for inclusive and flavour-tagged jets. These studies include observables such as the Lund jet plane, energy–energy correlators, jet mass, and hadron-in-jet distributions, providing sensitivity to both perturbative and non-perturbative aspects of QCD. Comparisons between beauty-initiated and light-quark–enriched jets allow the investigation of mass-dependent radiation effects, while theoretically well-defined flavour-tagging schemes enable precision tests of perturbative QCD. Together, these measurements extend jet-substructure studies to the forward region and provide new constraints for parton-shower and hadronization models.

Speaker: Murilo Santana Rangel (Federal University of Rio de Janeiro (BR))

rangel_jetsub.pdf

10:45 AM → 12:30 PM Beyond the Standard Model

Convener: Nicolás A. Neill (Universidad Mayor)

10:45 AM Neutrino and Beyond Standard Model Physics Searches at the CERN ProtoDUNE Detectors

The Deep Underground Neutrino Experiment (DUNE) will deploy massive liquid argon time projection chamber (LArTPC) detectors to measure the properties of neutrinos with unprecedented precision. Currently, two full-scale prototypes of the DUNE far detectors are at CERN, which are called the ProtoDUNE detectors. Recent studies indicate that these prototypes have the potential to detect neutrinos and long-lived beyond Standard Model (BSM) particles from one of the targets in CERN’s north area that is exposed to the 400 GeV Super Proton Synchrotron (SPS) beam. Numerous neutrino interaction candidates have been observed in the ProtoDUNE data. Detecting neutrinos at the ProtoDUNE detectors is a key demonstration of the feasibility of a future BSM physics programme. In addition, a substantial sample of neutrino interactions in a DUNE LArTPC detector could be a valuable source of data for testing event reconstruction algorithms. This talk will highlight the status and progress of this programme of work and the prospects for establishing a BSM physics programme at the CERN Neutrino Platform.

Speaker: Ciaran Hasnip (CERN)

ICHEP_2026_CiaranHasnip_Slides_31July2026.pdf

11:00 AM Searches for physics beyond the Standard Model with the SBND experiment

The Short-Baseline Near Detector (SBND) is a 112-ton liquid argon time projection chamber 110 m away from the Booster Neutrino Beam (BNB) target at Fermilab (Illinois, USA). The close location to the BNB origin makes the experiment sensitive to physics beyond the Standard Model (BSM) produced in the beam. Thanks to its advanced scintillation light detection system, a timing resolution at the nanosecond level further boosts the experiment capabilities. This enables timing to be used as an analysis tool, targeting heavy BSM particles produced in the decays of mesons in the BNB and arrive at the detector later than neutrinos. In this talk, we present ongoing reconstruction efforts on timing as well as expected sensitivities factoring in reconstruction improvements.

Speaker: Vu Chi Lan Nguyen

SBND_BSM_ICHEP2026.pdf

11:15 AM Probing Neutrinos and Light Dark Sector Particles with Ultra-Low Threshold Skipper CCDs in ATUCHA II

Skipper-CCDs, with their capability of achieving single-electron resolution and ultra-low energy thresholds, open a unique window to probe neutrino interactions and light dark sector particles beyond the Standard Model. In this work, we analyze a dataset acquired during 222 days of reactor ON and 33 days of reactor OFF using a 2.2 g Skipper-CCD installed inside the containment building of the 2 GWth nuclear reactor Atucha II. This experiment, in collaboration with CONNIE, has already provided the most competitive constraints to date on millicharged particles produced in nuclear reactors, in the mass range between 1 eV and 700 keV. Here, we present exclusion limits from current exposures, as well as prospective exclusion limits achievable with increased exposure and detector upgrades for well-motivated exotic particles such as axions and dark photons, and explore the sensitivity to the neutrino magnetic moment. We include the collective effects in silicon for low energy detection due to the predicted plasmon peak that significantly enhances the sensitivity at low energies.

Speaker: Eliana Depaoli

ICHEP_2026_Probing_Neutrinos_and_Light_Dark_Sector_Particles_with_Ultra-Low_Threshold_Skipper_CCDs_in_ATUCHA-II.pdf

11:30 AM MAGNETIC MONOPOLES PRODUCTION AND MASS LIMITS: THEORIES AND SEARCHES

The electric charge discrete nature has a prevalent role in the Dirac magnetic Monopole symmetrized Maxwell theory. Moreover hypothetical particles are overriding in several grand unified theories, and even connected with Berry geometric phase. Here theoretical proposals on magnetic Monopoles and related experimental searches are updated and compared. Our calculations aiming to obtain mass limits for different production mechanisms are presented, mainly Drell-Yan and Photon-Fusion of the Dirac magnetic Monopoles and Monopolium, in pp experiments for present and future colliders as LHC, HE-LHC, and FCC. Distinct theoretical frameworks proposed for 0,1/2, 1 spin angular momentum are addressed. Also distint masses ranges are explored considering ALICE, ATLAS, CMS and Moedal efforts, and perspectives.

Speaker: Prof. M.Beatriz Gay Ducati (UFRGS)

ICHEP2026_MBGayDucati.pdf

11:45 AM Subliminal monopole search results with time-based trigger selection approach using the NOvA far detector data

We report the search for a magnetic monopole using the 2743-day exposure cosmic-ray triggered data collected by the NOvA far detector, which is a 14kt high segmented liquid scintillator one. The small overburden of the far detector helps us to extend the search to the low mass region that has been unexplored previously where the NOvA experiment has the best sensitivity.

Speaker: Alexander Antoshkin (Joint Institute for Nuclear Research (RU))

ICHEP_AntoshkinAI_Monopoles_31_Aug_2026.pdf

12:00 PM The MoEDAL-MAPP experiment – Status Report

This talk presents a status update and outlook for the Monopole and Exotics Detector at the LHC (MoEDAL), which has focused on searches for magnetic monopoles and other highly ionizing particles (HIPs) predicted by BSM theories. It highlights pioneering monopole searches via the dual Schwinger process in heavy-ion collisions and introduces the new MoEDAL Apparatus for Penetrating Particles (MAPP), which targets feebly interacting particles (FIPs).

Speaker: Dr Igor Ostrovskiy (The University of Alabama)

MoEDAL_IgorOstrovskiy_ICHEP2026.pdf

12:15 PM COmpact DEtector for EXotics at LHCb: CODEX-b

The COmpact DEtector for EXotics at LHCb (CODEX-b) is a particle physics detector dedicated to displaced decays of exotic long-lived particles (LLPs), compelling signatures of dark sectors Beyond the Standard Model, which arise in theories containing a hierarchy of scales and small parameters. The CODEX-b detector is a cube with 10m per side with two internal sections, planned to be installed near the LHCb interaction point. It is built of a new generation of high performance RPCs triplet chambers, derived from the ATLAS upgrade RPC technology, providing a space x time resolution of a few mm x 300 ps per individual detector layer. It will have a near-zero background environment, hence complementing the new-searches program of other detectors like ATLAS or CMS. A demonstrator detector, CODEX-𝛽, has been installed to take data in 2026. It will validate the design and physics case for the future CODEX-b. CODEX-𝛽 will be responsible for validating the background estimations for CODEX-b, demonstrating integration in the LHCb readout system, and showing the suitability of the baseline tracking and its mechanical support. This talk will present the latest developments and will focus on the status and plans for CODEX-𝛽.

Speaker: Juliette Alimena (DESY)

CODEXb_ICHEP_31July2026.pdf

10:45 AM → 12:30 PM Operation, Performance and Upgrade of Present Detectors

Convener: Silvio Donato (Universita & INFN Pisa (IT))

10:45 AM The ATLAS Trigger System

The ATLAS experiment in the LHC Run 3 uses a two-level trigger system to select events of interest to reduce the 40 MHz bunch crossing rate to a recorded rate of up to 3 kHz of fully-built physics events. The trigger system is composed of a hardware based Level-1 trigger and a software based High Level Trigger. The selection of events by the High Level Trigger is based on a wide variety of reconstructed objects, including leptons, photons, jets, b-jets, missing transverse energy, and B-hadrons in order to cover the full range of the ATLAS physics programme. We will present an overview of improvements in the reconstruction, calibration, and performance of the different trigger objects, as well as computational performance of the High Level Trigger system.

Speaker: Andrea Ventura

ATLAS-Trigger_Ventura-ICHEP2026.pdf

ATLAS-Trigger_Ventura-ICHEP2026.pptx

11:00 AM Revolutionizing the CMS High-Level Trigger System at HL-LHC with Next Generation Triggers

The Next Generation Triggers (NGT) project aims to research and develop new ideas and technologies for the experiment trigger systems at the HL-LHC and beyond. A central component of this effort is the expansion of the CMS High-Level Trigger (HLT) system towards a novel data-scouting paradigm, where all events accepted by the Level-1 trigger are reconstructed and recorded in a high-level, storage-efficient format suitable for prompt physics analysis. The R³ (Real-time Reconstruction Revolution) program addresses this challenge by fundamentally rethinking the HLT event reconstruction to deliver offline-quality performance while operating within the critical processing and storage capacity constraints of the system. Advanced algorithms optimized for heterogeneous computing architectures, including GPUs and distributed accelerators, combined with a reorganization of data structures, will be incorporated to significantly reduce processing time. With only a single opportunity to reconstruct each event, an integrated real-time calibration loop will perform on-the-fly derivation of optimal calibration constants, enabling in-situ calibration of newly acquired data. The output format will be strategically tuned to provide sufficient detail for comprehensive physics analyses while minimizing data volume. This contribution will cover latest developments and validation studies to establish the feasibility and physics potential of the innovative NGT scouting approach in CMS.

Speaker: Bruno Alves (CERN)

AccelerateTrackingPerformance.pdf

11:15 AM Experience with the ATLAS High Level Calorimeter Trigger Software in the LHC Run 3

The ATLAS detector is concluding the Run-3 data-taking, during which an average of 65 proton–proton collisions per bunch crossing was achieved by the LHC, a large increase with respect to nominal conditions (~27.5). The data from such events is directly used by the High-Level Trigger farm to identify those with higher physics potential. An important class of HLT software algorithms is related to the ATLAS calorimeters, participating in electron/photon, tau and jet detection and missing transverse energy measurement. A highly optimized set of tools allows for fast calorimeter data access and decoding. Different algorithms use calorimeter cells for the reconstruction of objects (e.g.: clusters related to photons), fundamental for the experimental physics yield. Other algorithms use these same cells information to identify and reject detector noise. Some of the clustering algorithms were improved by adding Machine Learning techniques to the framework. Expert knowledge inspired the selection of more relevant features for object detection, improving the background rejection. The present work describes the performance of such algorithms in the farm, highlighting online/offline data quality and computing resources monitoring in the presence of high detector occupancy. The operation experience with these algorithms is inspiring an important upgrade programme for the HL-LHC.

Speaker: Edmar Egidio Purcino De Souza (UFBA)

ICHEP_HLTCalo_EdmarSouza_080726_v5.pdf

11:30 AM Advances in the Optimisation of the LHCb First Level Trigger

An automated bandwidth division has been deployed, in the LHCb HLT1, since 2024. This procedure uses adaptive moment estimation to determine the optimal selection criteria while satisfying constraints such as the total HLT1 output rate and thresholds shared between common trigger categories. The bandwidth division is now widely available to the collaboration for development and testing of new trigger lines via Continuous Integration (CI) on GitLab, providing information about exclusive and inclusive rates per trigger line, trigger efficiencies for each simulation sample included, and inclusive rate overlap between trigger lines. A goal is to develop the bandwidth division CI into allowing pseudo-real-time tunings, by integrating it with the existing LHCb infrastructure. This will enable the end-users to study and monitor the effect of selection criteria on the trigger rate for the study and monitoring of trigger performance. Studies for introducing an anti-correlation penalty term in the minimisation figure of merit have been performed, to increase stability and the monotonicity of the optimised HLT1 selection thresholds across a range of output rates. This talk will present the bandwidth division algorithm, and the development towards having a pseudo-real-time bandwidth division for LHC Run 4.

Speaker: Aidan Richard Wiederhold (The University of Manchester (GB))

AidanWiederhold_BWdiv.pdf

11:45 AM The upgrade of the ATLAS Trigger and Data Acquisition system for the High Luminosity LHC

The ATLAS experiment at CERN is constructing upgraded system for the "High Luminosity LHC", with collisions due to start in 2030. In order to deliver an order of magnitude more data than previous LHC runs, 14 TeV protons will collide with an instantaneous luminosity of up to 7.5 x 10e34 cm^-2s^-1, resulting in much higher pileup and data rates than the current experiment was designed to handle. While this is essential to realise the physics programme, it presents a huge challenge for the detector, trigger, data acquisition and computing. The design of the TDAQ upgrade comprises: a hardware-based low-latency real-time Trigger operating at 40 MHz, Data Acquisition which combines custom readout with commodity hardware and networking to deal with 4.6 TB/s input, and an Event Filter running at 1 MHz which combines offline-like algorithms on a large commodity compute service with the potential to be augmented by commercial accelerators. Offline-style clustering and jet-finding in FPGAs, and accelerated track reconstruction are designed to combat pileup in the Trigger and Event Filter respectively. This contribution will report recent progress on the design, technology and construction of the system. The physics motivation and expected performance will be shown for key physics processes.

Speaker: Kristina Mihule (CERN)

HLLHC_ATLAS_TDAQ_Upgrade_ICEHP2026_Mihule_Version31072026_1212.pdf

12:00 PM Performance of the trigger system of the BM@N/NICA spectrometer in experiments with Xe ion beam

The fixed-target experiment BM@N is designed and constructed to conduct studies of nucleus - nucleus collisions with beams of Nuclotron at energies of 2 – 4 GeV per nucleon. The developed interaction trigger is based on a system of fast scintillation beam counters and barrel multiplicity detector. A special electronics module was developed using FPGA technology for realization of trigger logic with minimal delay. Beam counters have a picosecond time resolution and provide start pulse for time-of-flight detectors of the BM@N experiment. Hear we give an overview of the trigger detectors and electronics, and report on system performance in experimental runs with Xe ion beams.

Speaker: Sergey Sedykh

ICHEP2026_848_Sedykh_BMN_trigger.pdf

12:15 PM Real-Time Pulse Simulator of ATLAS Tile Calorimeter

The LHC and the ATLAS experiment will undergo a Phase II upgrade, enabling operation at significantly higher luminosity conditions and imposing stringent requirements on real-time data processing. As part of this upgrade, the Tile Calorimeter (TileCal) readout electronics will be fully replaced, demanding the development, validation, and long-term testing of new trigger and energy reconstruction algorithms. To support these activities, a real-time FPGA-based simulator operating at the LHC bunch-crossing frequency of 40 MHz has been developed. The simulator emulates the complete readout electronic chain, generating energy values for a selected calorimeter cell according to its statistical distribution. It also incorporates realistic electronic noise and reproduces the ADC output produced by the signal shaper. The system is capable of producing continuous data streams over extended periods, enabling systematic validation, stress testing, and performance evaluation of hardware-based trigger and energy reconstruction firmware under realistic and repeatable operating conditions.

Speaker: Thiago CAMPOS ACACIO PASCHOALIN (Juiz de Fora UF)

Real-Time Pulse Simulator of ATLAS Tile Calorimeter_v3.pdf

10:45 AM → 12:30 PM Quark and Lepton Flavor Physics

Conveners: Jianchun Wang (Chinese Academy of Sciences (CN)), Sandra Amato (Univ. Federal do Rio de Janeiro (BR))

10:45 AM Measurements of $V_{cb}$ and $V_{ub}$ at Belle and Belle II

The Belle and Belle II experiments have collected a $1.2~\mathrm{ab}^{-1}$ sample of $e^+ e^-\to B\bar{B}$ collisions at a center-of-mass energy corresponding to the $\Upsilon(4S)$ resonance. These data, with low particle multiplicity and constrained initial state kinematics, are an ideal environment to study semileptonic and leptonic decays of the $B$ meson. Combined with theoretical inputs, measurements of both inclusive and exclusive decays yield information about the Cabibbo-Kobayashi-Maskawa matrix elements $V_{cb}$ and $V_{ub}$. We present new results on leptonic decays $B\to \tau \nu$ and $B\to\mu\nu$, and new measurements of $b\to c\ell\nu$ and $b\to u\ell \nu$ decays. We also present studies on the so-called gap modes, which could explain the difference between the inclusive semileptonic $B$ decay rate and the sum of all known exclusive $B$ decay rates.

Speaker: Giovanni Gaudino (University Federico II and INFN, Naples (IT))

2026-07-31-ICHEP-Gaudino-v1.pdf

11:00 AM Recent results from LHCb on FCCC decays

Semileptonic b-hadron decays proceed via charged-current weak interactions and provide a powerful laboratory for precision tests of the Standard Model. Their experimental reach benefits from large branching fractions and clean signatures, while theoretical interpretations rely on increasingly robust determinations of the relevant hadronic form factors. Measurements of these modes constrain key Standard Model parameters and dynamics, including CKM matrix elements and b-hadron production properties. This contribution presents a selection of recent LHCb results on charged-current semileptonic b-hadron decays and highlights their impact on current phenomenology.

Speaker: Martino Borsato (Universita & INFN, Milano-Bicocca (IT))

ICHEP_2026_FCCCdecays_LHCb.pdf

11:15 AM LFU tests in tree level b-hadron decays at LHCb

In the SM, the electroweak bosons couple to the three lepton families with the same strength, the only difference in their behaviour being due to the difference in mass. In recent years, some deviations have been found in measurements of the ratios of branching fractions for $b$-hadrons decaying into final states with different lepton flavours. This talk presents recent results of lepton flavour universality tests in $b \to c\ell\nu$ decays, using hadronic or muonic $\tau$ decays, performed at LHCb.

Speaker: Adlene Hicheur (Federal University of Rio de Janeiro (BR))

ICHEP2026_AH_LFU_talk_off.pdf

11:30 AM Angular analyses of charged current decays at LHCb

Semileptonic $b$-hadron decays proceed via charged-current interactions and provide powerful probes for testing the Standard Model and searching for beyond Standard Model effects. The advantages of studying such decays include the large branching fractions and reliable calculations of the hadron matrix elements. Several features may be studied such as form factor parameters and New Physics Wilson coefficients. In this contribution, recent LHCb results on this topic are presented.

Speaker: Tobias Krischan Knospe (Technische Universitaet Dortmund (DE))

tknospe-ICHEP-2026-07-31.pdf

11:45 AM Probing heavy neutrinos through semileptonic decays

The small masses of neutrinos strongly suggest the existence of mass-generating mechanisms beyond the Standard Model, likely involving additional neutral lepton fields (either left-handed, right-handed, or both). These mechanisms can give rise to effective four-fermion couplings, which are accessible through semileptonic decays.
By analyzing the angular spectra of these semileptonic decays, we've identified novel observables. These observables are precisely zero within the Standard Model, making them highly sensitive to the presence of new neutral leptons. This talk will demonstrate how these specific observables can be used to probe the mass and handedness of these additional neutral leptons.

Speaker: Claire Chevallier (IJCLab - Université Paris Saclay)

mainAfb-ICHEP.pdf

12:00 PM Measurement of the ratios $R(D^{(*)}) = \mathcal{B}(B \to D^{(*)} \tau \nu) / \mathcal{B}(B \to D^{(*)} \ell \nu)$ with the $BABAR$ detector.

Semileptonic decays of $B$ mesons involving the high-mass $\tau$ lepton are sensitive probes for physics beyond the Standard Model. The relative rates of branching fractions $R(D) = \mathcal{B}(B \to D \tau \nu) / \mathcal{B}(B \to D \ell \nu)$ and $R(D^*) = \mathcal{B}(B \to D^* \tau \nu) / \mathcal{B}(B \to D^* \ell \nu)$, where $(\ell=e,\mu)$ are independent of the CKM element $|V_{cb}|$ and of other theoretical uncertainties. Based on the 433 $\text{fb}^{-1}$ data collected at the $\Upsilon(4S)$ resonance by the $BABAR$ detector at the PEP-II collider located at the SLAC National Accelerator Laboratory, we report a measurement of $R(D)$ and $R(D^{*})$ using semileptonic $B$-tagging and leptonic $\tau$ decays.

Speaker: Gerald Eigen (University of Bergen (NO))

GE-RD-ICHEP.pdf

10:45 AM → 12:30 PM Heavy Ions

Convener: Victor Gonçalves (Universidade Federal de Pelotas)

10:45 AM Exclusive four pion photoproduction in ultraperipheral Pb-Pb collisions with ALICE

Ultraperipheral collisions (UPCs), where the impact parameter is larger than the sum of radii of two nuclei, provide a clean environment for rare multi-hadron resonances studies. The excited states of $\rho$ meson are predicted by theory, however purely known. The ALICE Collaboration has measured exclusive four-pion photoproduction cross section times branching ratio in UPCs of Pb-Pb at $\sqrt{s_{\rm NN}} = 5.02$~TeV, where single and double resonance structure were considered. The ALICE data suggest two resonance structure which stays in contrast with the recent H1 data results supporting the single resonance hypothesis. The upgraded ALICE detector has a new possibility of observing four- and six-pion states, including decay products of charmonia in Run 3. The data allow for more detailed study of the interplay of resonant and non-resonant contributions in hadronic systems. The invariant mass of these systems is large enough to be considered as a hard probe, while keeping the mass small, hence giving a better sensitivity to phenomenon such as saturation than for example charmonia probes. In this talk, the newly published result of exclusive four-pion final state from Run 2 will be shown, as well as the ongoing studies of multi-hadron final states from Run 3.

Speaker: Amrit Gautam (The University of Kansas (US))

2026-07-31-UPC_26_ICHEP.pdf

11:00 AM $D^0$ and $B^0$ photoproduction in ultraperipheral collisions at the LHC

Ultraperipheral collisions (UPCs) at high energies provide an excellent laboratory to study photon-induced interactions and heavy flavor production in a clean experimental environment. In this work, the inclusive $D^0$ and $B^0$ photoproduction in ultraperipheral $pPb$ and $PbPb$ collisions at LHC energies is analyzed within the color dipole S-matrix formalism. Differential cross sections are evaluated in transverse momentum space, and predictions for rapidity and transverse momentum spectra are obtained using different descriptions of the unintegrated gluon distribution, covering both linear and nonlinear QCD dynamics. The sensitivity of the results to the underlying gluon dynamics is discussed, and comparisons with recent CMS and ALICE preliminary data for $D^0$ photoproduction are presented. Our results indicate that a detailed analysis of these collisions can provide valuable insights into the strong interaction at high energies, as well as into nuclear effects in heavy ion collisions.

Speaker: Luana Santana (Universidade Federal de Pelotas (BR))

ICHEP2026_Luana.pdf

Inclusive heavy meson photoproduction in 𝑝⁢𝑃⁢𝑏 and 𝑃⁢𝑏⁢𝑃⁢𝑏 collisions

Investigating the inclusive 𝐷⁰ photoproduction in ultraperipheral 𝑃⁢𝑏⁢𝑃⁢𝑏 collisions at the Large Hadron Collider

11:15 AM Charmonium and exclusive dimuon photoproduction at forward rapidity in ALICE

The cross section for coherent charmonia photonuclear production in ultra-peripheral collisions (UPCs) at the LHC is particularly sensitive to the low Bjorken-$x$ behaviour of the gluon distribution function of the interacting lead nuclei. It provides important constraints on the initial stages in heavy ion collisions. The new measurements of coherent $J/\psi$ and $\psi(2S)$ photoproduction by ALICE in Pb-Pb UPCs as well as the prospects of coherently produced $J/\psi$ mesons in UPCs of O-O, both at the forward rapidity using Run 3 data at $\sqrt{s_{\rm NN}} = 5.36$ TeV are reported. The measurements sample the gluon distribution of nucleus down to $x\sim 10^{-2}$. Results are compared to theoretical predictions based on gluon shadowing or saturation and indicate a large suppression w.r.t. the impulse approximation. The off-resonance exclusive dimuon cross section shows sensitivity to the photon flux modeling. The result shows different agreement of data measurement with various MC generator predictions.

Speaker: Evgeny Kryshen (Joint Institute for Nuclear Research (RU))

2026-07-31-ichep-kryshen.pdf

11:30 AM Inelastic contributions to light-by-light scattering in ultraperipheral heavy ion collisions

The current theoretical estimations lead to cross-sections for $AA\to\gamma\gamma AA$ which are smaller than the measured ones by the ATLAS and CMS Collaborations, which motivates for calculation of subleading corrections. In our last paper[1] we estimated for the first time the contribution of inelastic channels to the LbL scattering in ultraperipheral collisions, in which one or both of the nuclei dissociate. These new mechanisms are related to extra emissions that are difficult to identify and may be misinterpreted as enhanced $\gamma\gamma$ scattering compared to the standard result.
We include processes of coupling of photons to individual nucleons in addition to coherent coupling. Both elastic and inelastic with couplings of photons to nucleons are taken into account. The inelastic photon fluxes are shown and compared to standard fluxes in the nucleus. We show the ratio of the inelastic corrections to the standard contribution as a function of diphoton invariant mass and photon rapidity difference. Our results indicate that the inelastic contributions is of the order of 20-40% of the coherent production. Uncertainties due to factorization scale choice are quantified. The discussion how to eliminate or measure the inelastic contributions will be presented.

[1] M. Klusek-Gawenda, V.P. Goncalves and A. Szczurek,
Phys.Lett.B867(2025)139614.

Speaker: Antoni Szczurek (Rzeszow University)

talk_ichep2026_inelastic.pdf

11:45 AM $\gamma \gamma \to \gamma \gamma$ scattering in UPC and associated measurement of neutron emission from nuclei

We present result of our recent paper [1] for the production of diphotons in lead on lead UPC for different neutron classes 0n0n, 0nXn+Xn0n and XnXn, possible to measure in Zero Degree Calorimeters (ZDCs).
The calculations are performed for the ATLAS kinematics. Our calculations for neutron classes are tested against existing data for $\rho^0$ production in UPC. We get a good agreement for absolutely normalized cross section as well as very good results for fractional neutron cross section which gives confidence to the analogous calculation for diphoton production, corresponding to $\gamma \gamma \to \gamma \gamma$ scattering.
We present both absolutely normalized as well as fractional cross sections for the different neutron classes. We also show different distributions in impact parameter, photon rapidity, transverse momentum, diphoton invariant mass and photon rapidity difference. The shapes of the photon distributions depend on the neutron classes which we quantify in this paper. It would be valuable to test our predictions using the ATLAS main detector and the ATLAS ZDCs.

[1] P. Jucha, M. Klusek-Gawenda and A. Szczurek,
``Neutron emission associated with $\gamma \gamma \to \gamma \gamma$
scattering in ultraperipheral collisions of heavy ions at the LHC'',
Phys. Rev. {\bf D112} L051501 (2025).

Speaker: Mariola Klusek-Gawenda (Institute of Nuclear Physics Polish Academy of Sciences)

MKG_ICHEP2026.pdf

12:00 PM J/ψ photoproduction and polarization in peripheral Pb--Pb collisions with ALICE

Ultrarelativistic heavy ions generate intense electromagnetic fields that act as a prolific source of high-energy photons, inducing photonuclear reactions. While these processes are typically studied in ultraperipheral collisions (UPCs), where hadronic interactions are suppressed, an unexpected excess of J/$\psi$ yield at very low transverse momentum ($p_{\rm T}$) has been observed in peripheral Pb--Pb collisions. This signal is attributed to coherent J/$\psi$ photoproduction occurring within the nucleus-nucleus (AA) overlap region. This process serves as a unique probe to investigate the interaction between photoproduced states and the fast-expanding quark-gluon plasma (QGP), potentially unveiling new properties of the medium while simultaneously providing a clean experimental signature to constrain the nuclear gluon distribution at low Bjorken-x. In order to confirm the photoproduction origin of this low-$p_{\rm T}$ excess, polarization measurements are essential. Indeed, the photoproduced quarkonium is expected to retain the transverse polarization of the incoming photon, providing a clear experimental signature to distinguish it from hadronic production. In this contribution, we present centrality-dependent measurements of coherent J/$\psi$ photoproduction in peripheral Pb--Pb collisions at both mid- and forward rapidity and report the first measurement of J/$\psi$ polarization at forward rapidity.

Speaker: Jinjoo Seo (Heidelberg University (DE))

260731_jj_ichep_v5.pdf

12:15 PM New results in Ultra-Peripheral collisions at LHCb

Ultra-peripheral collisions provide a unique environment to study pomeron- and photon-induced reactions with heavy nuclei. These interactions can produce a wide range of final-state particles, from light vector mesons to heavy quarkonia, and also offer an excellent opportunity to search for axion-like particles (ALPs) through photon-induced processes. With a fast and flexible data-acquisition system, full particle identification, and the ability to reconstruct very low-p$_T$.

Speaker: Pedro Nogarolli (Federal University of Rio de Janeiro (BR))

LHCb_UPC_ICHEP.pdf

10:45 AM → 12:30 PM Astroparticle Physics and Cosmology

Convener: Claudio Dib (Federico Santa Maria Technical University (CL))

10:45 AM Very special linear gravity: A gauge-invariant graviton mass

Linearized gravity in the Very Special Relativity (VSR) framework is considered. We prove that this theory allows for a non-zero graviton mass $m_g$ without breaking gauge invariance nor modifying the relativistic dispersion relation. We find the analytic solution for the new equations of motion in our gauge choice, verifying as expected the existence of only two physical degrees of freedom. Finally, through the geodesic deviation equation, we confront some results for classic gravitational waves (GW) with the VSR ones: we see that the ratios between VSR effects and classical ones are proportional to $(m_g/E)^2$, $E$ being the energy of a graviton in the GW. For GW detectable by the interferometers LIGO and VIRGO this ratio is at most $10^{-20}$. However, for GW in the lower frequency range of future detectors, like LISA, the ratio increases significantly to $ 10^{-10}$, that combined with the anisotropic nature of VSR phenomena may lead to observable effects.

 Ref:Phys. Lett. B829(2022)137080

Speaker: Jorge Alfaro (Pontificia Universidad Católica de Chile)

VSLG.pdf

11:15 AM The Hubble Tension: Relativistic Dark Matter Production from Long-lived Particles

The tension between direct measurements of the Hubble constant and those stemming from Cosmic Microwave Background probes has triggered a multitude of studies. The connection between cosmology and particle physics has shown to be a valuable approach to addressing the Hubble tension. In particular, increasing the number of relativistic degrees of freedom in the early universe helps alleviate the problem. In this work, we write down effective field theory describing relativistic dark matter production in association with neutrinos leading to a larger H0. We derive limits on the effective energy scale that governs this relativistic production of dark matter as a function of the dark matter mass for fermion, vector, and scalar dark matter fields. In particular, scalar dark matter particles are more effective in increasing the effective number of relativistic species. Also, if they have weak scale masses, then the relativistic production of dark matter should be governed by Planck scale effective operators in order to alleviate the Hubble tension.

Speaker: Matheus M. A. Paixão (International Institute of Physics (IIP-UFRN))

11:30 AM When Dark Photons Shine or Fade: Three-Photon versus Neutrino Decays Below $2m_e$

Dark photons with masses below the electron-positron pair production threshold, $m_{A'} < 2m_e$, occupy a qualitatively distinct regime of hidden sector physics. In this mass range, visible decays into charged leptons are kinematically forbidden
Two competing decay modes become relevant, which exhaust the allowed decay channels. The first is the loop-induced visible decay $A' \to 3\gamma$, yielding a highly suppressed but experimentally distinctive multi-photon signal.

The second arises from mixing with the Standard Model $Z$ boson and leads to an invisible decay channel, $A' \to \nu \bar{\nu}$. Despite their importance, the interplay between these two decay modes has not previously been studied in a systematic way.

We present the first framework that consistently compares three-photon and neutrino decays of sub-$2m_e$ dark photons and analyses their distinct implications for early-Universe cosmology and for experimental searches for long-lived particles. In addition to collider probes, energy injection from the $A' \to 3\gamma$ channel can lead to spectral distortions of the Cosmic Microwave Background, providing complementary cosmological sensitivity to this otherwise elusive decay mode.

Speaker: Prof. Alexander Belyaev (University of Southampton & Rutherford Appleton Laboratory)

Belyaev-DarkPhoton-ICHEP2026.pdf

11:45 AM Measurement of the underground muon flux at Y2L and Yemilab with the COSINE-100 and COSINE-100U experiments

The muon veto system of the COSINE-100 and its upgraded successor, COSINE-100U, consists of 37 plastic scintillator (PS) panels that provide a 4$\pi$ coverage of the detector. COSINE-100 operated from September 2016 to March 2023 at the YangYang Underground Laboratory (Y2L) in South Korea, which is located at an effective depth of approximately 1800 meters water equivalent. An initial study of the underground muon flux at Y2L was performed using the first 2.6 years of COSINE-100 data, including a measurement of the muon flux and its annual and diurnal modulations. The next phase of the experiment, COSINE-100U, began operation in September 2025 at Yemilab, located at an effective depth of approximately 2500 meters water equivalent. In this contribution, we present updated measurements of the muon flux at Y2L based on 6.5 years of COSINE-100 data, as well as the first results on the muon flux at Yemilab obtained with the COSINE-100U detector.

Speaker: Luis Eduardo Funo de Moura Franca (Instituto de Física, Universidade de São Paulo (USP))

Muonflux_ICHEP2026_v2.pdf

12:00 PM From Smooth to Stochastic: Galactic Supernova Fluxes of MeV Particles and Their Detection

New exotic particles with MeV masses, such as axion-like particles or light dark matter, can be emitted from core-collapse supernovae (SNe) with semi-relativistic velocities and reach Earth as an extended packet due to their speed dispersion. It has been argued that the superposition of contributions from past galactic SNe gives rise to a smooth and stationary flux that could be observable in terrestrial detectors. In this work, I re-examine this hypothesis through a numerical simulation of the galactic history of SN explosions. Due to the long time spread and the short observational time window, each one contributes only with a narrow range of energies. Consequently, the flux at Earth is not smooth but instead exhibits a stochastic energy spectrum that depends on the new particle mass and the SNe spatial and temporal distribution. This treatment has important implications for the expected signal, which displays a spectral shape that is not properly described by the smooth approximation, and also allows us to explore sub-MeV particles. Finally, I will revisit existing bounds on axion-like particles and fermionic dark matter using neutrino water Cherenkov detectors and direct detection experiments, finding weaker constraints than previously reported.

Speaker: Dr Andres Daniel Perez (Instituto Balseiro, Centro Atómico Bariloche)

AndresDanielPerez-ICHEP2026.pdf

10:45 AM → 12:30 PM Detectors for Future Facilities, R&D and Novel Techniques (including Quantum Sensors)

Conveners: Antonio Vilela Pereira (CBPF - Brazilian Center for Research in Physics (BR)), Felix Reidt (CERN)

10:45 AM Data Acquisition System for a Cosmic Muon Veto Detector on top of an RPC Stack

A 12-layered RPC detector stack is operational at TIFR, Mumbai. A cosmic muon veto detector (CMVD) is being developed around this setup as part of a feasibility study for a shallow-depth neutrino detector. It uses extruded plastic scintillator (EPS) strips as the active medium. Muon interactions in the scintillator are detected by silicon photomultipliers (SiPMs) coupled to two wavelength-shifting fibres embedded in each strip.

The detector is designed to achieve a muon detection efficiency exceeding 99.99%. Precise muon identification requires accurate measurement of the SiPM charge. The analogue signals from the SiPMs are converted into voltage pulses using trans-impedance amplifiers and sampled by a DRS4 chip operating at 1 GS/s. The sampled signals are digitised using a fast ADC. Data acquisition is triggered by a cosmic muon signal from the RPC stack, after which zero-suppressed data are transmitted to a back-end server for further waveform analysis and charge extraction.

The data acquisition system is implemented on an AMD Spartan-7 FPGA, which hosts a MicroBlaze soft-core processor for control and process management. The FPGA-based DAQ board under development integrates multiple DRS4 ASICs along with a network interface. This paper presents the development and commissioning of the CMVD DAQ system.

Speaker: Prajjalak Chattopadhyay (Tata Institute of Fundamental Research, Mumbai)

Prajjalak_ICHEP2026_presentation.pdf

11:00 AM High Speed DAQ Solution for Small-scale Particle Physics Experiment

We present a high-speed, modular Data Acquisition solution developed for Pitt-CoRTEx (Pitt-Cosmic Ray Tracker Experiment), a compact and scalable muon tracking detector designed for educational and small-scale particle physics applications. The detector consists of 128 extruded plastic scintillator bars, each embedded with a wavelength-shifting (WLS) optical fiber that guides light to Silicon Photomultipliers (SiPMs) upon energy deposition. To support real-time signal readout, a custom front-end DAQ system is developed using the CITIROC-1A ASIC for signal amplification, shaping and charge measurement. Each DAQ module integrates a 32-channel CITIROC ASIC and a Spartan-7 FPGA daughter card, providing local signal processing and scalability. Four such DAQ modules interface with the detector, with one acting as the master and others as slaves, enabling synchronized acquisition across all 128 channels. The master DAQ transmits the 128-bit muon trajectory data to a Raspberry Pi module, which in turn illuminates LEDs along the X and Y axes which provides a visual display of cosmic muon track. The DAQ modules include onboard SiPM biasing, ADCs and FPGA for implementing real-time track fitting. The Pitt-CoRTEx system is portable, scalable, low-power, and well-suited for muon flux and angular distribution studies, undergraduate training, and public science outreach.

Speaker: Yuvaraj Elangovan (University of Pittsburgh (US))

DAQ_IICHEP_Talk.pptx

11:15 AM Development and test of a small-scale readout system based on the SAMPA ASIC

A collaboration between USP Physics Institute and the Microelectronics Department of the USP Polytechnic School has been the main developer of a front-end ASIC, named SAMPA, for the readout of gaseous detectors. The ASIC was originally developed to instrument the new Gas Electron Multiplier (GEM) readout plane of the ALICE Time Projection Chamber, as well as to upgrade the front-end of the Multi Wire Proportional Chamber of the ALICE Muon Tracker, becoming soon also the choice for the electronics of other high energy & nuclear physics experiments. Each of them developed its own, custom, front-end board to host the ASIC, designed to fit its custom acquisition system, very performant, but too complex for smaller experiments or laboratory activities.
To make SAMPA widely available and usable, we designed a front-end board, compatible with the Scalable Readout System developed by the RD51 community and developed the necessary firmware and acquisition software to operate it. We will present the results of the commissioning and testing with a detector of this readout system, highlighting performance and capabilities. It is working as expected and could be a useful tool for small experiments and/or in the R&D phase of new detectors (e.g., test beam of prototypes).

Speaker: Marco Bregant (Universidade de Sao Paulo (USP) (BR))

260731_Bregant_SampaSRS_ICHEP26.pdf

11:30 AM The µ-RWELL technology in the IDEA Muon System for FCC-ee

The Innovative Detector for Electron-positron Accelerator (IDEA) concept
has been proposed to address the challenging requirements of the Future
Circular Collider (FCC-ee). In this framework, the micro-Resistive WELL
technology has been selected for the muon detection system,
owing to its compact design, cost-effectiveness, and suitability for
large-area instrumentation.
The ongoing R&D program focuses on the optimization of both the detector
and the readout electronics to meet the system requirements. Various readout architectures, including standard strips, capacitive sharing, and top-readout schemes, are under investigation. Concurrently, a
comparative analysis of the TIGER and APV-25 front-end electronics is
being performed, with validation provided by test-beam campaigns
at the CERN SPS.

Simulation tools are extensively leveraged to model the
integration of the µ-RWELL with new electronic stages and to guide the
design of a dedicated ASIC.

The full implementation of the µ-RWELL muon system within
the IDEA DD4HEP framework, allows
for a precise evaluation of the detector performance in the FCC-ee
environment.

This contribution presents the latest updates on detector
R&D, electronics characterization, and simulation studies, outlining the
roadmap toward the final µ-RWELL configuration for the IDEA muon system.

Speaker: Mahmoud AlThakeel (CERN)

ICHEP_2026.pdf

11:45 AM Beam Test Performance of Double-Gap Glass RPCs with Custom PETIROC2A Readout for the ALICE 3 Muon Identification System

The ALICE Collaboration is preparing for the ALICE 3 detector upgrade, scheduled for data collection during LHC Run 5. A cornerstone of this upgrade is the Muon IDentifier (MID), designed to reconstruct J/$\psi$ at rest by tagging muons with transverse momenta down to $p_T = 1.5$ GeV/c at mid-rapidity. To operate effectively under the expected particle fluence, Resistive Plate Chambers (RPCs) have been identified as the primary technology due to their excellent timing resolution and cost-effectiveness.This work presents the design and performance of double-gap glass RPC prototypes developed at BUAP. A key innovation in these detectors is the integration of additive manufacturing (3D printing) for critical mechanical components, which ensures precise, rapid, and reproducible assembly. The prototypes were instrumented with a custom Front-End Card based on the PETIROC2A ASIC and characterized at the CERN T10 beam line. Experimental results demonstrate a detection efficiency exceeding 90% and a time resolution better than 1 ns. These findings confirm the feasibility of 3D-printed RPCs as a robust solution for the ALICE 3 muon detection requirements.

Speaker: Hector David Regules Medel (Autonomous University of Puebla (MX))

ICHEP2026_BeamTest_RPC.pdf

12:00 PM Design-by-Validation: Engineering, 3D Modeling/CFD, and Reduced-Scale Prototyping of Large Multi-Loop Leakless Detector Cooling and Thermostabilization Systems

Large-scale tracking and calorimetry detectors demand high channel-count cooling with tight thermal stability while minimizing leak risks. We present a design-by-validation R&D workflow developed for the NICA/MPD detector in Dubna to realize a large multi-loop, leakless cooling and thermostabilization system. The work is performed by a consortium of engineering companies, dedicated R&D groups, enabling an end-to-end path from concept to integration. The full system comprises 118 parallel circuits supplying thermally sensitive subsystems with a target temperature stability of ±0.1 °C; the contribution includes a system-level schematic of the architecture and its main functional blocks.

Risk is reduced through a practical, test-stand-driven program that validates key elements and operating regimes on a reduced-scale prototype. Dedicated stand reproduces representative hydraulic and thermal behavior with six loops, enabling studies of control strategies, transients, loop-to-loop coupling, and failure modes. Engineering design iterations define candidate configurations and instrumentation layouts. To identify critical zones and parameters, 3Dmodeling/CFD is coupled to targeted experiments, refining boundary conditions and tracking parameter evolution.
We summarize reduced-scale results and their translation to the full-scale design, highlighting scalability, parallel multi-loop operation, and lessons relevant to future facilities requiring reliable, leakless, multi-channel thermal management.

Speakers: Dr Alexander Fedotov (ArcoLab LLC), Mr Kiril Levkov (TurboEnergy and ArcoLab LLC)

presentation ICHEP Levkov 31.07.26.pdf

10:45 AM → 12:30 PM Artificial Intelligence, Machine Learning and Quantum Computing in HEP

Convener: Prof. Ying-Ying Li (IHEP)

10:45 AM Recent Results from the ATLAS Anomaly Detection Trigger in Run 3

Anomaly detection expands on traditional model-focused search programs at colliders via data-driven machine learning (ML) selection algorithms. Deploying anomaly detection at filtering (trigger) level enables the acquisition of fundamentally novel events, probing below historically constraining energy thresholds. However, successful use of such ML algorithms in the trigger requires attention to algorithm resources, latency, and hardware implementation. We present the latest on the Generic Event-Level Anomaly Trigger Option (GELATO) for the ATLAS experiment. The algorithm will be described, namely its autoencoder-based structure, its deployment across the Level-1 and High Level Triggers, and its performance for selected beyond the Standard Model benchmarks. The introduction of GELATO to the ATLAS Run 3 menu will also be covered, including 2025 commissioning and a first look at 2026 data-taking, along with a discussion of future anomaly triggers for Run 4 of the LHC.

Speaker: Kaito Sugizaki (Pennsylvania)

ICHEP_20260731_sugizaki.pdf

11:00 AM Classifying hadronic objects in ATLAS with ML/AI algorithms

Hadronic object reconstruction & classification is one of the most promising settings for cutting-edge machine learning and artificial intelligence algorithms at the LHC. In this contribution, highlights of ML/AI applications by ATLAS to QCD and boosted-object identification, MET reconstruction and other tasks will be presented.

Speaker: Alex Sopio (The University of Edinburgh (GB))

20260730_ichep_mlai_jets.pdf

11:15 AM Accelerating Graph Neural Networks on FPGAs for Real-Time Level-0 Muon Triggering

The High-Luminosity LHC will generate unprecedented data rates, pushing real-time trigger systems to their limits. We present a novel approach deploying graph neural networks (GNNs) on FPGAs to achieve fast, sub-microsecond inference for Level-0 muon triggers. Exploiting the sparse, relational structure of detector hits, the method preserves key spatial correlations while enabling hardware-efficient, low-latency execution. We explore model compression, pipelined parallelism, and resource-aware design to optimise throughput under stringent real-time constraints. Preliminary results indicate that this approach can scale to high-rate environments, demonstrating the potential of FPGA-accelerated GNNs for AI-assisted event selection at the first step of the Level-0 muon trigger chain. Our work highlights strategies for integrating machine learning with FPGA-based triggers, offering a path toward real-time processing in next-generation high-energy physics experiments.

Speaker: Giuliano Gustavino (Roma I)

2026.07.31.MuonTrigger.pdf

11:30 AM Comparative study of machine learning algorithms for hypernuclei identification in simulated heavy-ion collisions.

We present a study on the application and comparison of different machine learning algorithms for the identification of hypernuclei from simulated heavy-ion collisions, particularly those with mass number A = 3 to A = 5. The study focuses on three supervised learning algorithms - Boosted Decision Trees, Support Vector Machines and Artificial Neural Networks - which were trained to distinguish true hypernuclei candidates from combinatorial background using topological and kinematic variables of the decay products. The results demonstrate that these techniques significantly improve the background rejection of the selected hypernuclei candidates compared to traditional identification methods, thereby enhancing both the significance and precision of eventual measurements.

Speaker: Pedro Da Costa Huot

Presentation_ICHEP.pdf

11:45 AM A Point Transformer Model for dN/dx Reconstruction in High-Granularity TPCs

Particle identification (PID) is essential for future particle physics experiments such as the Circular Electron-Positron Collider (CEPC) and the Future Circular Collider. A high-granularity Time Projection Chamber (TPC) not only provides precise tracking but also enables dN/dx measurements for PID. The dN/dx method estimates the number of primary ionization electrons, offering significant improvements in PID performance. However, accurate reconstruction remains a major challenge for this approach. In this presentation, we introduce a deep learning model, the Graph Point Transformer (GraphPT), for dN/dx reconstruction. In our approach, TPC data are represented as point clouds. The network backbone adopts a U-Net architecture built upon graph neural networks, incorporating an attention mechanism for node aggregation specifically optimized for point cloud processing. The proposed GraphPT model surpasses the traditional truncated mean method in PID performance. In particular, for the CEPC baseline TPC, the $K/\pi$ separation power improves by approximately 10% to 20% in the momentum interval from 5 to 20 GeV/c.

arXiv: 2510.10628 (accepted by JHEP)

Speaker: Dr Guang Zhao (Institute of High Energy Physics (CAS))

PointTransformer_TPC_dNdx_ICHEP2026.pdf

12:00 PM Neural network cluster finding for the ALICE TPC online processing

The ALICE TPC is the main tracking and PID detector used in the ALICE experiment at CERN. The online reconstruction is capable of handling dense tracking environments at data rates of 900 GB/s, with a GPU-based infrastructure, ideally suited for parallelizable machine learning applications.
The work to be presented concerns cluster finding, with the first-ever application of neural networks in ALICE online processing. Both a classification network for noise removal and a regression network for cluster property inference are presented. A 3D charge input to the cluster finding step marks a new approach taken for this challenge. The tuning of this algorithm for physics and computing performance is the major objectives for deployment purposes. Design optimizations of the network architecture, floating-point quantization, custom CUDA-streamed implementation using the ONNX Runtime framework and results from the first commissioning runs mark the cornerstones of this project. The achieved performance is a reduction in number of clusters of up to 18% with maintained or improved physics performance, demonstrated on simulated and real data. This includes tracking and matching efficiencies, track quality measurements, d$E$/d$x$ bandwidth investigations and invariant mass spectra of reconstructed $\Lambda, K^0_S$ and $D^0$ particles.

Speaker: Christian Sonnabend (CERN, Heidelberg University (DE))

ICHEP2026.pdf

12:15 PM A Model-Independent Machine-Learning–Based Approach to CP Violation Searches in Multibody Decays

Searches for Charge-Parity (CP) violation in multibody decays provide a powerful probe of physics beyond the Standard Model, particularly in scenarios where interference effects and other final-state interactions can potentially generate localised asymmetries across the decay phase space, which may be significantly larger than the corresponding phase-space–integrated effects. In decays with high-dimensional phase spaces, traditional model-independent approaches often rely on low-dimensional representations, which might reduce their sensitivity.

We present a simple and fully model-independent machine-learning-based approach to search for CP violation in decay phase spaces of arbitrary dimension. A classifier is trained to distinguish particle from antiparticle decays using the full phase-space information, and two-sample test statistics constructed from the classifier output are used to test the CP symmetry hypothesis. The method is validated using simulated samples, and its sensitivity is compared to established model-independent techniques.

Speaker: Felipe Luan Souza De Almeida (University of Barcelona (ES))

ICHEP_MLforCPV_260731.pdf

12:30 PM → 2:30 PM Lunch

2:30 PM → 4:15 PM Neutrino Physics

Conveners: Cristovao Vilela (Laboratory of Instrumentation and Experimental Particle Physics (PT)), Júlia Tena Vidal

2:30 PM Status of the Short-Baseline Near Detector at Fermilab

The Short-Baseline Near Detector (SBND) is one of three liquid argon time projection chamber (LArTPC) neutrino detectors positioned along the axis of the Booster Neutrino Beam (BNB) at Fermilab, and serves as the near detector in the Short-Baseline Neutrino (SBN) Program. SBND completed commissioning and began taking neutrino data in the summer of 2024, and is recording about 3 million neutrino interactions per year. Using its superb tracking and calorimetric capabilities, and powerful light collection system, SBND is carrying out a rich program of neutrino interaction measurements and novel searches for physics beyond the Standard Model (BSM). As the near detector, it will enable the full potential of the SBN Program’s sterile neutrino measurements by precisely characterizing the unoscillated neutrino beam, constraining BNB flux and neutrino-argon cross-section systematic uncertainties. In this talk, the current status, first results and future prospects of SBND are discussed.

Speaker: Guadalupe Moreno Granados (Virginia Tech)

SBNDstatus_ICHEP2026_GMoreno.pdf

2:45 PM Recent Results and Physics Program of the ANNIE Experiment

The Accelerator Neutrino Neutron Interaction Experiment (ANNIE) is a gadolinium-doped water Cherenkov detector on the Booster Neutrino Beam at Fermilab. ANNIE’s primary physics goals are to measure final-state neutron multiplicities and charged-current neutrino cross sections as functions of kinematic variables. These measurements provide important input for reducing systematic uncertainties in neutrino oscillation experiments and improving background rejection in rare-event searches, including proton decay and the diffuse supernova neutrino background.

ANNIE combines neutron tagging enabled by gadolinium loading with precise timing and imaging from Large Area Picosecond Photodetectors (LAPPDs). The experiment also serves as a testbed for novel technologies, including advanced photodetectors such as LAPPDs and detection media such as water-based liquid scintillator (WbLS), enabling hybrid Cherenkov–Scintillation light detection with improved particle identification and directional reconstruction. Operating on the same neutrino beam as the Short-Baseline Neutrino liquid argon detectors, ANNIE enables correlated cross-section measurements across different targets.

ANNIE is currently operating with a multi-LAPPD-instrumented detector and accumulating a high quality high-exposure dataset. Recent analyses focus on neutron multiplicity measurements, cross-section studies, advanced reconstruction techniques, and precision neutrino timing relative to the beam RF structure. This talk will present an overview of the detector, recent results, and ongoing R&D and analysis efforts.

Speaker: Bruno Gelli (UC Davis)

ICHEP Natal - Recent Results and Physics Program of the ANNIE Experiment - Jul 31, 2026 (3).pdf

3:00 PM Enabling high-precision measurements with a monitored and tagged neutrino beam: the nuSCOPE experiment

The poor knowledge of neutrino cross sections at the GeV scale is projected to be responsible for some of the leading sources of uncertainty in next-generation oscillation experiments. Current neutrino scattering measurements are difficult to perform and interpret due to the broad-band nature of artificial neutrino beams and associated neutrino flux uncertainties. Building on the ideas and R&D from the ENUBET and NuTAG collaborations, we present a proposal for the nuSCOPE experiment (see arXiv:2503.21589). nuSCOPE is a high-precision, short-baseline neutrino experiment at CERN that employs neutrino monitoring and tagging. This allows for an exceptionally well controlled muon and electron neutrino flux, with the extraordinary capacity to reconstruct neutrino energy on an event-by-event basis. This opens up the possibility for a wealth of cross-section measurements usually reserved only for electron-scattering experiments. In this talk we will describe the proposed beamline, as well as the neutrino monitoring and tagging techniques and performances. We will also illustrate the potential for such a facility to perform precision measurements of neutrino-nucleus cross-sections, as well as searches for physics beyond the standard model.

Speaker: Laura Munteanu (CERN)

slides

3:15 PM Results from the DsTau (NA65) experiment at CERN-SPS

The DsTau (NA65) experiment at CERN is designed to measure the inclusive differential cross section for the production of Ds mesons decaying into a tau lepton and a tau neutrino in proton–nucleus (p–A) interactions. The DsTau detector is based on the nuclear emulsion technique, which provides exceptional spatial resolution and enables the precise detection of short-lived particles such as charmed hadrons. In this presentation, we present the first results from the analysis of the pilot-run data, with a particular emphasis on the performance of proton interaction vertex reconstruction in environments with high track densities. The collected data have been compared with predictions from several Monte Carlo event generators. The current status of the Ds search is also reported.

Speaker: Murat Ali Guler (Physics Department of Middle East Technical University (TR))

ICHEP_DsTau_mguler.pdf

3:30 PM Neutrino Physics at FASER

In 2022, FASER, the ForwArd Search ExpeRiment, directly detected the first neutrinos produced at the LHC, ushering in the dawn of collider neutrino physics. Since then, FASER has collected over 97% of the available data throughout LHC Run 3 and has been able to detect hundreds of LHC neutrinos and study their properties. In this talk, we present the latest results from FASER on TeV-energy electron and muon neutrinos, including studies using both electronic and emulsion detectors.

Speaker: Oscar Martinez (The University of Manchester (GB))

ICHEP26_FASER_Neutrinos_v3.pdf

3:45 PM Recent results from the Scattering and Neutrino Detector at the LHC (SND@LHC)

SND@LHC is a stand-alone experiment to perform measurements with LHC neutrinos in the pseudorapidity range 7.2 < 𝜂 < 8.6, complementary to all the other LHC experiments. It is located 480 m downstream of IP1. The detector is composed of a hybrid system with a 800 kg tungsten target instrumented with emulsion and electronic trackers, followed by a calorimeter and a muon system. The detector distinguishes all three neutrino flavours, opening unique opportunities to probe heavy flavour production at the LHC in previously inaccessible regions of particular interest for future circular colliders and for predictions of very high-energy atmospheric neutrinos. The physics programme includes studies of charm production, lepton universality tests, and searches for Feebly Interacting Particles via scattering signatures. Since 2022 the experiment has collected 309 fb-1 of data at 97% efficiency. Using data from the electronic detectors, muon neutrino interactions were found as well as solid evidence for electron neutrino interactions. In this talk we present recent results, including a muon flux analysis that has significantly increased our understanding of the behaviour of the LHC beams. Reconstruction of emulsion data has now achieved a sub-micrometer resolution and significant progress was made with vertex finding and electronic shower recognition.

Speaker: Chayanit Asawatangtrakuldee (Chulalongkorn University (TH))

ICHEP2026_SNDLHC_CA.pdf

2:30 PM → 4:15 PM Dark Matter

Convener: Danijela Bogavac (IFAE)

2:30 PM Constraining Effective Field Theories for dark matter candidates annihilating into gamma-ray lines with CTAO

Gamma-ray lines represent a "smoking gun" signature for dark matter annihilation, offering a distinct spectral feature against astrophysical backgrounds. In this talk, we present the projected sensitivity of the Cherenkov Telescope Array Observatory (CTAO) toward the Galactic Centre and Dwarf Galaxies. By leveraging CTAO’s superior energy resolution and flux sensitivity, we derive new limits on the energy scale for scalar and fermionic dark matter using an effective field theory framework.

Our analysis places these projections in the context of current results from direct and indirect detection experiments. We demonstrate that CTAO will provide a critical discovery channel for dark matter signals, offering a reach that is either complementary to or more powerful than existing instruments. These findings highlight CTAO’s potential to redefine our understanding of dark matter interactions and spectral line searches in the next decade.

Speaker: Ms Silvia Lucia Correa Angel (Universidade Federal do Rio Grande do Norte, International Institute of Physics)

ICHEP_2026.pdf

2:45 PM Revising Indirect Dark Matter Constraints with Updated Astrophysical J-Factor Priors

In the past decade, indirect searches for particle dark matter with gamma-ray experiments have placed stringent constraints on the annihilation cross section or decay lifetime across a wide range of dark matter masses. These limits depend critically on the astrophysical J factor, which encodes the dark matter distribution in the target and typically dominates the systematic uncertainty. As improved observational data and dynamical modeling revise current J-factor determinations, many published limits risk becoming outdated unless the full analyses are repeated.

We derive an analytic expression that quantifies how limited knowledge of the astrophysical J factor affects upper limits. This expression can be used to update published dark matter limits when revised J-factor estimates become available, without requiring access to the full experimental likelihood. The formalism applies to analyses with both Gaussian and log-normal priors on the J factor and is validated with Monte Carlo simulations and by reproducing published limits. We further show its extension to the combination of multiple targets, allowing combined limits to be updated using only publicly available limits.

This framework enables existing indirect-detection results to be re-evaluated as astrophysical inputs improve, preserving and extending the scientific value of current and future gamma-ray searches for dark matter.

Speaker: Giacomo D'Amico (Institut de Física d'Altes Energies (IFAE))

GDAmico_JfactorRevising_DM_limits.pdf

3:00 PM Super Heavy Dark Matter and the Pierre Auger Observatory

We discuss the connection between data from the Pierre Auger Observatory and a broad class of dark matter models involving the production of superheavy particles in the early Universe. These models share a common feature: a superheavy new sector ($M_X>100$~PeV), with long-living particles that are suitable candidates for dark matter, which can eventually decay into Standard Model particles in the PeV-EeV energy range. Depending on the particle physics model for the dark sector, the expected emission of Standard Model particles can be neutrino or photon dominated, with energies within the detection capabilities of the Pierre Auger Observatory, the largest experimental setup for the detection of cosmic particles at the highest energies (E>100 PeV). In this talk we will review different models for superheavy dark matter and, by exploiting 20 years of data, the constraining capabilities of the Pierre Auger Observatory, highlighting the observational limits on the two fundamental scales of these models: the dark matter particles mass ($M_X$) and lifetime ($\tau_X$).

Speaker: Roberto Aloisio (Gran Sasso Science Institute and INFN)

Aloisio-ICHEP26.pdf

3:15 PM Origin of Cosmic Positrons and Electrons in the TeV Region

The positron flux measured by the Alpha Magnetic Spectrometer in the TeV region exhibits complex energy dependence. It is described by the sum of a term associated with the positrons produced in the collision of cosmic rays, which dominates at low energies, and a new source term, which dominates at high energies and is associated with either dark matter or astrophysical origin. The positron source term also manifest itself in the measured electron spectrum. This is the first indication of the existence of identical charge symmetric source term both in the positron and in the electron spectra and, as a consequence, the existence of new physics.

Speaker: Cheng Zhang (Institute of High Energy Physics,CAS(CN))

ICHEP2026PosEle_ChengZhang.pdf

3:30 PM Exotic charged multiplets and Millicharged Dark Matter

Although dark matter (DM) is commonly assumed to be electrically neutral, candidates with extremely small electric charges remain an intriguing possibility. We explore a theoretical framework in which such millicharged states arise from exotic inert scalar multiplets that do not couple to Standard Model fermions. Focusing on an inert scalar triplet whose lightest component is stable, we identify a viable millicharged DM candidate and perform a comprehensive phenomenological analysis. We determine its thermal relic abundance via freeze-out and assess existing constraints from cosmology, direct detection, and indirect detection. We further discuss the implications of these bounds and outline potential avenues for discovery.

Speaker: Guillermo Gambini (National University of Engineering (UNI))

GG-ICHEP-2026.pdf

2:30 PM → 2:45 PM Education & Outreach

2:30 PM Open Data in the Czech Open Science Programme

The Czech Academy of Sciences project entitled Open Science offers one-year internships for selected secondary school students. It announces a wide range of topics from different scientific fields. For several years now, we have used this programme to attract students to the study of physics. In small groups consisting of one to three students, participants learn the basics of high-energy physics. Virtual visits to the ATLAS LHC experiment via Oculus Rift help them to imagine the scale of current LHC detectors. They learn about distributed data processing and contribute to simulations using LHC@Home on the BOINC platform.

The main part of the internship focuses on examples of data analysis. LHC experiments publish parts of the full LHC datasets in simplified form, together with examples of how to process them. Interactive histograms demonstrate the principles of signal selection, while more complex algorithms are implemented using Jupyter notebooks. Students present their results at the Scientific Fair, which attracts more than 10,000 visitors, and at the final student conference.

Internships focused on the processing of open data have been running since 2017, and some participating students have already successfully completed their university studies and gained professional experience, including work at CERN.

Speaker: Jiri Chudoba (Czech Academy of Sciences (CZ))

20260730-ichep-chudoba-v3.pdf

20260730-ichep-chudoba-v3.pptx

2:30 PM → 4:15 PM Electroweak and Top Quark Physics

Conveners: Jorge de Blas (Universidad de Granada (ES)), Matteo Defranchis (CERN)

2:30 PM Recent results on inclusive and differential top quark production at CMS

High precision measurements of top quark pair production are crucial to advance our understanding of perturbative and soft QCD and provide a deeper understanding of the partons inside the proton. In this talk, recent highlights in top quark pair and single top production at different center-of-mass energies will be discussed.

Speaker: Samadhan Kamble (Indian Institute of Technology Madras (IN))

ICHEP26_Samadhan-Kamble_CMS_TOP.pdf

2:45 PM Recent results on threshold production and quantum properties of the top quark at CMS

Since the start of the LHC, pinning down the properties of top quarks has been a vital point of the LHC research program. Only recently, it was understood how top-quark properties can even be used to probe quantum properties and other properties. In this talk, recent CMS measurements of top-quark properties and their interpretation in terms of quantum measurements will be discussed, as well as the observed signature of a pseudo-scalar quasi bound state near threshold.

Speaker: Laurids Jeppe (CERN)

ICHEP2026_ttthreshold_LauridsJeppe_v4.pdf

3:00 PM Rare top production at CMS

The talk reviews the measurements and new interpretations of four-top production, rare top quark processes, and rare top quark decays, covering those predicted by the SM and also beyond.

Speaker: Riccardo Salvatico (CERN)

Salvatico_RareTopProcessesCMS.pdf

3:15 PM Cross-section measurements with top-quark events in ATLAS

The LHC produces a vast sample of top quark pairs and single top quarks. Measurements of the inclusive top quark production rates at the LHC have reached a precision of several percent and test advanced Next-to-Next-to-Leading Order predictions in QCD. Differential measurements in several observables are important to test SM predictions and improve Monte Carlo generator predictions. In this contribution, comprehensive inclusive and differential measurements of top-quark-antiquark pair and single-top-quark production are presented that use data recorded by the ATLAS experiment.

Speaker: Sven Menke (Max Planck Society (DE))

ichep2026_menke.pdf

3:30 PM Measurements of the top-quark mass in ATLAS

The top-quark mass is one of the key fundamental parameters of the Standard Model that must be determined experimentally. Its value has an important effect on many precision measurements and tests of the Standard Model. In this contribution, the top quark mass measurements by the ATLAS experiment are reviewed. These include measurements in two broad categories, the direct measurements, where the mass is determined from a comparison with Monte Carlo templates, and determinations that compare differential cross-section measurements to first-principle calculations.

Speaker: Mark Owen (University of Glasgow (GB))

ATLASTopMassICHEP2026.pdf

3:45 PM Associated production of top quarks in ATLAS

The high center-of-mass energy of proton-proton collisions and the large datasets collected at the CERN Large Hadron Collider (LHC) offer a unique opportunity to study rare processes within the Standard Model (SM) with unprecedented precision. Measuring rare SM processes, such as associated production of the top quarks with other particles, not only provides rigorous tests of SM predictions but can also reveal potential discrepancies or offer critical input for refining theoretical models. This contribution presents the latest highlights from the ATLAS top quark physics program.

Speaker: Shayma Wahdan (Bergische Universitaet Wuppertal (DE))

ICHEP2026_Brazil_v3_Shayma_Wahdan.pdf

4:00 PM Measurements of cross-sections close to the ttbar threshold in ATLAS

The wealth of data collection by the Large Hadron Collier has opened the door to new measurements of top quark properties including those particularly sensitive to the ttbar threshold region, such as the effects of the quasi-bound states contribution, which were previously beyond reach. This contribution presents the latest highlights in this area from the ATLAS experiment.

Speaker: Guennadi Borissov (Lancaster University (GB))

talk-ICHEP-2026.pdf

2:30 PM → 4:15 PM Strong Interactions and Hadron Physics

Convener: Eduardo Fraga (Instituto de Física, Universidade Federal do Rio de Janeiro)

3:00 PM Light Exotics at BESIII

Using the world’s largest samples of J/ψ and ψ(3686) events produced in e+e- annihilation, BESIII is uniquely positioned to investigate light hadrons in radiative and hadronic charmonium decays. This includes detailed studies of exotic hadron candidates such as multiquark states, hybrid mesons and glueballs. Recent highlights on the light exotics searches, including a glueball-like particle X(2370) , exotics state π1(1600), new production mode of exotics $\eta$1(1855), as well as the new strangeonium state X(2300), will be presented.

Speaker: Yanping Huang (Chinese Academy of Sciences (CN))

2026_ICHEP_yanping_v2.pdf

3:15 PM Cross Section Measurements and Searches for New Structures in e+e− annihilations at BESIII

The BESIII experiment has conducted extensive energy scans from √s = 3.7 to 4.95 GeV, leading to precise cross section measurements for various charmonium-related hadronic final states. The cross section for $e^+e^− → π^0π^0ψ(3686)$ is measured for the first time, revealing an enhancement around 4.2-4.4 GeV. Studies of $e^+e^− → Ξ(1530)^0 anti-Ξ^0$ + c.c. provide insights into charmed baryon pair production and find no significant signal for ψ(3770) decay into this mode. First measurements of the cross sections for $e^+e^− → K^0K^−π^+J/ψ$ + c.c. and $e^+e^− → K^+K^−ψ(2S)$ are presented, with the latter used to search for the charged $Z^±_{cs}$ state. Additionally, the cross section for $e^+e^− → Ω^+Ω^−$ is measured, yielding the effective form factor of the Ω baryon. These comprehensive measurements map out the production line shapes, probe potential exotic state contributions, and provide essential inputs for understanding the nature of the vector charmonium(-like) states (Y states) in this energy region.

Speaker: Hao LIU (Lanzhou University)

ICHEP2026.pdf

3:30 PM Searches for Exotic Hadrons and Novel Phenomena in Charmonium Physics at BESIII

Leveraging its high-statistics datasets, BESIII has performed dedicated searches for exotic hadronic states beyond the conventional quark model. A search for the decays $X(3872) → K_S^0 K^± π^∓$ and $K^∗(892) \bar{K}$ sets stringent upper limits on their branching fractions, providing new constraints on its molecular and tetraquark interpretations. The process $e^+e^− → γ D^+_sD^−_{s1}(2536)$+c.c. is investigated to search for a putative $1^{−+}$ molecular state, with no significant signal observed. A search near the $Λ_c$ anti-$Σ_c$ mass threshold finds no evidence for a bound state. In the charmonium sector, a partial wave analysis of $e^+e^− → π^+π^−J/ψ$ confirms the Zc(3900) and measures its production cross section. Furthermore, a search for the $1^{−+}$ charmonium-like hybrid in $e^+e^− → γ η^{(′)}η_c$ is reported. These diverse and high-sensitivity searches probe various models of exotic hadrons, significantly tightening the constraints on their production and decay properties, and deepening our exploration of non-perturbative QCD.

Speaker: Guo Xu

ICHEP_guoxu.pdf

3:45 PM Recent tetraquark studies at LHCb

Since the observation of the X(3872), numerous exotic tetraquark candidates have been discovered over the past two decades. Several of these hadrons exhibit explicitly exotic internal structures, including charged, open-flavour, doubly heavy-flavour, and fully heavy-flavour states, significantly enriching the field of exotic spectroscopy and attracting growing interest from the theory community. These states provide unique benchmarks for understanding QCD binding mechanisms. In this talk, the latest results on exotic tetraquark studies from LHCb are presented.

Speaker: Lorenzo Capriotti (Universita e INFN, Padova (IT))

Capriotti_tetraquarks_v4.pdf

4:00 PM Pentaquark Searches at LHCb

Pentaquarks have been predicted since the birth of the quark model and have long attracted strong interest from the hadron-physics community. Over the past decade, the LHCb experiment has observed several intermediate states that decay strongly into Jpsi p and Jpsi Lambda by studying multi-body B-hadron decays. These states are widely interpreted as pentaquark candidates. However, their internal nature remains under debate. One of the most powerful approaches to probe their structure is to study their decay branching fractions into different final states.This talk presents recent pentaquark studies from the LHCb experiment, focusing on searches for pentaquark decays into two open-charm hadrons. The current analyses are primarily limited by statistical precision. With the inclusion of Run 3 data in the future, all these studies can be significantly updated using data samples that are nearly an order of magnitude larger.

Speaker: Chen Chen (University of Warwick (GB))

pentaquark_ICHEP2026_chenchen.pdf

2:30 PM → 4:15 PM Beyond the Standard Model

Convener: Dr Louie Dartmoor Corpe (Laboratoire de Physique Clermont Auvergne (LPCA))

2:30 PM Placing Bounds on Dark Matter with Displaced Photons

Explaining the nature of dark matter is one of the most important challenges of this Century. The lack of signals in direct and indirect detection experiments motivate the exploration of new models capable of evading the current experimental constraints, but providing testable predictions. On the other hand, collider experiments are thoroughly exploring the existence of new long-lived particles, that is, particles beyond the Standard Model with a lifetime that is long enough such that they can travel a macroscopic distance before decaying. It is thus of interest to ask if the discovery of such a particle could provide information regarding dark matter.

If a neutral long-lived particle decays predominantly into photons and another stable particle, its presence can be reconstructed at the LHC in the form of displaced photons. These are recognized as such in terms of their delayed arrival time $t_\gamma$ and a non-pointing parameter $\Delta z_\gamma$. In this work we present a detailed recast of a search for displaced photons in ATLAS, and show how it can be used to constrain a dark matter model in a Universe with low reheating temperature.

Speaker: Dr Joel Jones-Perez

ICHEP_Jones_v2.pdf

2:45 PM The SHiP/NA67 experiment at the ECN3 high-intensity beam facility at the CERN SPS

The SHiP/NA67 experiment is a general-purpose intensity-frontier experiment for the search for feebly interacting GeV-scale particles and to perform neutrino physics measurements at the HI-ECN3 (high-intensity) beam facility at the CERN SPS, operated in beam-dump mode, taking full advantage of the available $4\times 10^{19}$ protons per year at 400 GeV. The collaboration is currently optimising the experiment's initial configuration for the commissioning and first physics runs of 2032-2033.
The setup consists of two complementary detector systems downstream of an active muon shield: the scattering and neutrino detector (SND), which includes a light dark matter (LDM) neutrino target with vertexing capability. and the hidden sector decay spectrometer (HSDS), consisting of a 50 m long decay volume followed by a spectrometer, timing detector, and a PID system. BDF/SHiP offers unprecedented sensitivity to the decay and scattering signatures of various new physics models and to tau neutrino physics.

Speaker: Markus Cristinziani (Universitaet Siegen (DE))

MC260731_ICHEP.pdf

3:00 PM MATHUSLA: A Proposed Long-Lived Particle Detector for High-Luminosity LHC

Beyond the Standard Model Long-Lived Particles (LLPs) appear in many theories that address fundamental open questions, such as the hierarchy problem and dark matter. The LHC may be producing copious numbers of neutral LLPs with masses above a GeV, only for these sneaky particles to escape the main detectors without being spotted. To fill this gap, we have proposed MATHUSLA (MAssive Timing Hodoscope for Ultra-Stable neutraL pArticles), which would be constructed on the surface above CMS and would take data during HL-LHC operations. The detector would be composed of several layers of solid plastic scintillator, with wavelength-shifting fibers connected to silicon photomultipliers, monitoring an empty air-filled decay volume. The Conceptual Design Report (CDR) published last year sets out a benchmark geometry of 40m x 40m x 25m, with a modular detector construction scheme that would allow data collection to begin as soon as the first module is installed. This poster will show the results of more detailed studies conducted since the CDR, including higher-statistics simulations of rare Standard Model backgrounds, FPGA implementation of trigger algorithms that would permit an “LLP trigger” to be sent to CMS, and "test stands" at the University of Victoria and the University of Toronto.

Speaker: Miriam Diamond

MATHUSLA ICHEP2026.pdf

3:15 PM Dark Sectors at the Collider Lifetime Frontier

In theories beyond the Standard Model of particle physics, the new particles in the so-called dark sector can have large lifetimes, commonly referred to as long-lived particles (LLP). I will motivate the quest for new, long-lived physics at colliders able to explain dark matter. The impact of the cosmic reheating dynamics on dark matter freeze-in production will also be discussed in a specific Higgs-portal model. I will emphasise the crucial role of collider LLP searches, focusing on prospects at the Future Circular Collider (FCC-hh), to unveil new dark sector physics.

Speaker: Giovanna Cottin (Pontificia Universidad Católica de Chile (CL))

ICHEP2026_DS_GCOTTIN.pdf

3:30 PM FASER Searches for New Particles

FASER, the ForwArd Search ExpeRiment, has collected over 97% of the available data throughout LHC Run 3. From its highly-shielded location 480 m from the ATLAS IP along the beam collision axis, FASER is able to carry out world-leading and nearly background-free searches for a wide variety of new particles. In this talk we will give a full update of FASER’s latest analyses, highlighting BSM searches for dark photons, axion-like particles and related particles, as well as FASER’s first search for quirks, extending existing search sensitivities by an order of magnitude in mass.

Speaker: Eli Marcel Welch (University of California Irvine (US))

FASER_ICHEP_2026_Eli_Welch.pdf

3:45 PM Spin Identification of Dark Sector Mediators through Angular Distributions

Spin correlations between the production and decay of Long-Lived Particles (LLPs) are commonly neglected in event generators used for LLP searches, potentially limiting the interpretation of experimental sensitivities. In this talk, we present spin-correlation effects in scenarios where LLPs are produced in pseudoscalar meson decays, such as $\pi^0,\eta,\eta^{\prime}\rightarrow AX\rightarrow Af\bar{f}$, with $X$ denoting the LLP. We report a consistent implementation of production-decay spin correlations within the FORESEE framework, extending its capabilities beyond the standard unpolarized case. Using the dark photon (DP) as a benchmark LLP, we show that spin correlations induce distinctive angular signatures in the final-state fermions. In particular, the cosine of the fermion polar angle, defined with respect to the beam axis in the DP rest frame, provides sensitivity to the LLP spin. We apply this framework to the FASER2, NA62, SHiP, and DUNE experiments, adopting conservative assumptions for angular reconstruction systematics. We obtain 95% CL exclusion limits in the coupling-mass plane, demonstrating the potential of current and future experiments not only to discover LLPs, but also to discriminate between polarized and unpolarized production scenarios. These results highlight the phenomenological importance and robustness of angular observables as complementary probes of new physics at the intensity frontier.

Speaker: Sebastian Julio Fuenzalida Garrido (Federico Santa Maria Technical University (CL))

slides_Natal2026.pdf

2:30 PM → 4:15 PM Operation, Performance and Upgrade of Present Detectors

Convener: MAURO Cosentino (Universidade Federal do ABC (BR))

2:30 PM Fifteen Years of CMS Muon System Operation at the LHC: Performance and Experience

The CMS muon system has been a key component of the experiment’s physics performance throughout more than 15 years of LHC operation. It provides efficient muon triggering, identification, and momentum measurement over a wide pseudorapidity range, relying on multiple complementary detector technologies. During Run 1 and Run 2, the system was based on Drift Tubes, Cathode Strip Chambers, and Resistive Plate Chambers, which have operated with high stability and availability under steadily increasing luminosity, pileup, and radiation conditions. More recently, Gas Electron Multiplier (GEM) detectors have been installed in the forward region during the Long Shutdown 2 and have been successfully integrated into CMS operations at the start of Run 3. Continuous detector monitoring, calibration, and maintenance, together with targeted upgrade and consolidation campaigns, have preserved high performance. The CMS muon system has delivered high-quality data for triggering and offline reconstruction, enabling flagship results such as the Higgs boson discovery and precision measurements of Standard Model processes. This contribution reviews the long-term operational experience of the CMS muon system and discusses its performance evolution and readiness for the High-Luminosity LHC.

Speaker: Lisa Borgonovi (CERN)

20260731_ICHEP26_CMSMuonRun3_LBorgonovi_v4.pdf

2:45 PM Performance of the ATLAS Muon System: Trigger and Reconstruction Studies with Run-3 Data

Precise and efficient muon detection is essential for a wide range of physics analyses performed with the ATLAS experiment at LHC. The excellent performance of the ATLAS Muon Spectrometer (MS) during LHC Run-1 and Run-2 has been demonstrated by the large number of physics results, in which muon triggering and reconstruction played a central role. For LHC Run-3 and in view of the High-Luminosity LHC era, significant detector upgrades were implemented, most notably the installation of the two New Small Wheels (NSW), in the innermost stations of the MS endcaps. The ATLAS MS now comprises both legacy gaseous detectors—Monitored Drift Tubes (MDT), Thin Gap Chambers (TGC), and Resistive Plate Chambers (RPC)—which have been in operation for over 15 years, and the two new technologies Micromegas and small-strip TGCs in the NSW. This presentation will cover the performance of all detectors of the ATLAS MS and muon trigger system. Particular emphasis will be given to the new detectors. The results will be presented in the context of the related physics studies and will include measurements of muon trigger and identification performance.

Speaker: Patrick Scholer (Carleton)

20260731_ichep_atlasmuondetperf_scholer.pdf

3:00 PM An overview of the performance and operation of the CMS RPC during Run 3, and preparations for Run 4

During Run 3, the Compact Muon Solenoid (CMS) experiment collected over 295 fb⁻¹ of proton-proton collision data at a center-of-mass energy of 13.6 TeV. A key element of the CMS trigger and data acquisition system is the Resistive Plate Chambers (RPC) system, a technology known for its fast response and good timing resolution. The RPC system is one of several sub-detector systems of the CMS experiment and comprises more than 1000 chambers, covering an area of approximately 3200 m² and a pseudorapidity range of |η| < 1.9. To ensure good data quality throughout this period, a series of studies on detector operation, calibration, and performance were performed. The latest results from these studies, as well as the plans for Run 4 data taking, will be presented.

Speaker: Mauricio Thiel (Universidade do Estado do Rio de Janeiro (BR))

ICHEP2026-v2-1.pdf

3:15 PM Upgrade of the ATLAS Muon Spectrometer for High-Luminosity LHC

The ATLAS Muon Spectrometer will be extensively upgraded during the Phase-II program in Long Shutdown 3 to meet the requirements for operation at the High-Luminosity LHC, which will be characterized by higher luminosity, increased trigger rates, and elevated radiation levels. New Resistive Plate Chamber (RPC) detectors with 1 mm gas gaps will be installed in the inner barrel layer to improve trigger robustness and acceptance. The inner barrel Monitored Drift Tube (MDT) chambers will be replaced by small-diameter MDT chambers to optimize the performance in high-occupancy regions and to create space for the new RPC chambers. In addition, MDT chambers will be integrated into the Level-0 trigger to enhance the transverse momentum resolution and, consequently, the trigger selectivity. In the barrel–endcap transition region, new Thin Gap Chamber (TGC) triplet chambers will replace the existing doublets to reduce trigger rates from random coincidences. Most of the readout and trigger electronics of the above-cited detectors will be replaced. Finally, the power distribution systems of all three detector technologies will also be upgraded to mitigate ageing, obsolescence, and radiation effects. This contribution summarizes the upgrade strategy, the current project status, and results from prototype and production studies.

Speaker: Alessandro Polini (Universita e INFN, Bologna (IT))

polini-ichep.pdf

3:30 PM CMS muon system upgrade for the HL-LHC: progress and readiness

The muon system of the CMS detector at the CERN Large Hadron Collider (LHC) is crucial for muon trigger, reconstruction, and identification performance. From 2026, the LHC will undergo a major upgrade during a shutdown period, after which the High-Luminosity LHC (HL-LHC) phase will start. During this phase, proton-proton collisions are expected to be delivered at 5 to 7 times the nominal LHC instantaneous luminosity, with a number of overlapping collisions per bunch crossing reaching 200. The upgrade program foreseen for the muon system is fundamental for CMS to exploit the full HL-LHC physics potential, maintaining the reconstruction efficiency and improving the trigger capabilities while extending the detector acceptance into the high pseudorapidity region. The upgrade of the front-end and back-end electronics for the Drift Tubes (DT) and Cathode Strip Chambers (CSC), as well as back-end electronics for the Resistive Plate Chambers (RPC), is essential to operate under the unprecedented HL-LHC data-taking conditions. Moreover, the installation of two new muon sub-detectors is foreseen: the improved Resistive Plate Chambers (iRPC) and the Gas Electron Multipliers (GEM). This talk will give an overview of the current status, challenges, and test results, highlighting the readiness of the CMS muon system for the HL-LHC.

Speaker: Leonardo Lunerti (Universita e INFN, Bologna (IT))

mu_upgrade_lunerti_ichep2026_v3.pdf

3:45 PM ​​Improved RPC (iRPC) detector for CMS data taking in HL-LHC

In view of the challenging CMS data taking in HL-LHC phase, an extensive upgrade is underway for the CMS Muon System to ensure its optimal performance in muon triggering and reconstruction. The key role of RPCs, as dedicated muon detectors, will provide relevant timing information, benefiting from their time resolution, to secure sub-bunch crossing event timestamps. To meet the requirements of LHC Phase 2, the RPC system will be expanded to a maximum pseudo-rapidity of 2.4. The forward Muon system's upcoming RE3/1 and RE4/1 stations will feature improved RPCs (iRPC). Distinguished by a unique design and geometry, including a 2D strip readout, these iRPCs represent a significant advancement over the current RPC system. The enhancements include the use of thinner electrodes, a narrower 1.4 mm gas gap and improved FEB allowing a 30 fC threshold. During the winter shutdown of LHC in 2025, two disks with 36 iRPC chambers were installed and commissioned at CMS in record time. The present talk provides a full summary of the iRPC construction, quality control, installation, commissioning and future perspectives.

Speaker: Sandro Fonseca (Universidade do Estado do Rio de Janeiro (BR))

ICHEP2026iRPCV02-2.pdf

4:00 PM MUonE: a precision instrument to observe elastic scattering

The MUonE experiment will precisely measure the differential cross section for elastic scattering of 160 GeV muons on the atomic electrons in fixed low-Z targets. The apparatus has been installed in the M2 beamline at the CERN SPS, just upstream of the AMBER experiment. In summer 2025, a Phase 1 test run was conducted with three tracking stations, out of the forty that are eventually foreseen. These stations were preceded by a beam momentum spectrometer to characterize the incoming muons. They were followed by an electromagnetic calorimeter and a muon tracker that together allowed for effective particle identification. Data from these detectors was digitized on a 40 MHz clock with a new DAQ system that employed FPGA logic to select elastic scattering events. The detector performance in this run and plans for the future will be presented.

Speaker: Lorenzo Punzi (Universita & INFN Pisa (IT))

PUNZI_31_07_26.pdf

2:30 PM → 4:15 PM Quark and Lepton Flavor Physics

Conveners: Dmytro Kovalskyi (Massachusetts Inst. of Technology (US)), Melissa Maria Cruz Torres (CBPF - Brazilian Center for Physics Research (BR))

2:30 PM Beauty to charmonium decays at LHCb

The presence of charmonium in the final states of $B$ decays is a very clean experimental signature that allow the efficient collection of large samples of these decays. Such a clean experimental signature makes these decays also suitable for precision measurements of beauty hadrons lifetime and CP violation measurements. In this work we present the most recent results of LHCb in the study of these decays, with particular attention to time-dependent measurements.

Speaker: Leandra Moeser (Technische Universitaet Dortmund (DE))

lmoeser_ichep26_btocharmonium.pdf

2:45 PM Beauty decays to hidden-charm final states at LHCb: first Run 3 measurements

Decays of beauty hadrons to hidden-charm final states provide precision probes of heavy-flavour dynamics and are essential benchmarks for lifetime measurements and production properties at the LHC. Using the first data collected by the LHCb experiment in Run 3, new measurements from the Beauty non-Charm Working Group are presented. These include determinations of the $B^0$ and $B^+$ lifetimes in decays to hidden-charm final states. Together, these results constitute the first Run 3 outputs of the working group and demonstrate the performance and physics reach of LHCb in the new data-taking period.

Speaker: Ozlem Ozcelik (CERN)

ICHEP_Ozlem.pdf

3:00 PM Lifetime Measurements at LHCb

Measurements of beauty and charm hadron lifetimes provide valuable probes of the heavy quark expansion, a key tool in relating measurements in flavor physics to fundamental Standard Model parameters. The speaker will present recent measurements of beauty and charm hadron lifetimes from the LHCb experiment.

Speaker: Steven R. Blusk (Syracuse University (US))

Beauty_Hadron_Lifetimes_ICHEP2026.pdf

Beauty_Hadron_Lifetimes_ICHEP2026.pptx

3:15 PM Heavy Flavor Physics Results from ATLAS

Recent precision studies of b-hadron properties and production performed by the ATLAS experiment are presented. The talk includes measurements of B-meson lifetimes and differential production cross-sections of Ds mesons in proton–proton collisions, together with ongoing studies of the radiative transition Bc* → Bcγ. These measurements and exploratory analyses provide stringent tests of heavy-quark dynamics, improve constraints on models of heavy-flavour production, and contribute to the understanding of hadron spectroscopy in the heavy-quark sector.

Speaker: Xin Chen (Tsinghua University (CN))

xinchen_ICHEP_v2.pdf

3:30 PM Rare Heavy-Flavour Decays and Exotic Spectroscopy Studies with ATLAS

A selection of recent ATLAS results on rare heavy-flavour decays and exotic hadron spectroscopy is presented. The talk includes measurements of the rare decay B → μμ using the full Run-2 dataset and a search for the lepton-flavour-violating decay τ → 3μ. In addition, published studies of resonant structures in J/ψ + ψ(2S) final states are discussed, providing new insight into the spectrum of strongly bound multi-quark systems. Ongoing exploratory investigations of exotic candidates in B⁰ → J/ψK decays are also briefly covered.

Speaker: Marcella Bona (Queen Mary University of London (UK))

bona_atlas.pdf

3:45 PM A search for double baryon-number violation in $B$-meson decays to two baryons.

Searches for processes in which baryon number is violated by 2, as would be observed in neutron-antineutron oscillation, have so far come up empty. Many of these searches involve first-generation quarks leaving open the possibility that these processes preferentially couple to initial or final states involving second- and third-generation quarks. We present the results of a search for decays $B^+ \to p \Lambda$, which violates baryon-number by 2. The analysis uses the full data set of about 430 fb$^{-1}$ collected at the $\Upsilon(4{\mathrm{S}})$ resonance by the $BABAR$ experiment, at the $e^+e^-$ collider PEP-II hosted by the SLAC National Accelerator Laboratory.

Speaker: Gerald Eigen (University of Bergen (NO))

GE-doublebaryon-ICHEP.pdf

4:00 PM Studies of fully baryonic decays of B hadrons at LHCb

B-hadron decays into fully baryonic final states provide critical insights into the mechanisms of baryon production in heavy-hadron decays. They also offer valuable platforms to study CP violation and hadronic resonances appearing as intermediate states in multi-body decays. Although such processes are rare, the large LHCb data set provides excellent opportunities to search for these decays and investigate their properties. This talk presents recent progress on measurements of fully baryonic B-hadron decays at the LHCb experiment.

Speaker: Tadeusz Lesiak

ICHEP26_BBaryonic_Lesiak.pdf

2:30 PM → 4:15 PM Heavy Ions

Convener: David Dobrigkeit Chinellato (Austrian Academy of Sciences (AT))

2:30 PM Recent CMS measurements of hard probes of QCD matter

High-mass and/or high transverse momentum objects are the best observables to investigate the internal dynamics of the strongly interacting matter formed in ultrarelativistic nuclear collisions.

This talk covers a selection of recent results on heavy-flavor hadrons and electroweak bosons in various nuclear collision systems from the CMS collaboration.

Speaker: Florian Damas (UNESP - Universidade Estadual Paulista (BR))

ICHEP2026_JetsPbPbCMS_v3.pdf

2:45 PM Measurement of Top quark pair production in Run3 PbPb collisions at 5.36 TeV with CMS

The production of top quarks in heavy ion collisions is a novel tool for investigating nuclear parton distribution functions at high Bjorken-x. Although a quark, the top has a short lifetime, decaying predominantly to a W boson and b quark pair, before hadronization. Leptonic final states from the subsequent W boson decay are thus effectively electroweak probes of the medium they traverse before reaching the detector. The CMS collaboration has reported evidence of top quark pair ($\mathrm{t\bar{t}}$) production using data from lead-lead (PbPb) collisions during Run 2. This talk will present the first measurement of $\mathrm{t\bar{t}}$ production utilizing $1.63~\mathrm{nb}^{-1}$ of PbPb data collected by CMS at 5.36 TeV in 2023 and derived using kinematic variables from leptons and jets.

Speaker: Andre Govinda Stahl (CERN)

ICHEP 2026.pdf

3:00 PM Search for jet quenching in OO collisions with the event activity dependence of hadron-jet correlations with ALICE

The ALICE Collaboration presents measurements of the semi-inclusive yield of charged-particle jets recoiling from a high-$p_\mathrm{T}$ hadron trigger in OO collisions at $\sqrt{s_{\mathrm{NN}}}=5.36$ TeV as a function of event activity (EA). The semi-inclusive recoil jet yield is less sensitive to cold nuclear matter effects than inclusive channels, thereby providing a sensitive probe of final-state jet quenching effects. EA is measured by a set of forward detectors, whose correlations demonstrate experimentally that EA is correlated with the collision geometry in OO. The measured EA-dependence of the recoil jet yield is compared to similar measurements in other collision systems, to expectations from inclusive-channel measurements of jet quenching in OO collisions, and to theoretical calculations.

Speaker: Florian Jonas (CERN)

2026-07-29-ICHEP_hJet_correlations_v3.pdf

3:15 PM Jet Quenching Identification in Simulated Pb–Pb Collisions Using Jet Substructure and Machine Learning Techniques

Comparisons between jet quenching theory and experiment generally rely on global observables, such as the nuclear modification factor $R_{AA}$ and the dijet momentum imbalance $x_J$. In this work, we take a different approach by adopting a jet-by-jet analysis to identify quenched jets from the jet substructure with supervised machine learning architectures.
The JEWEL code provides a theoretical framework to simulate parton energy loss in a dense QCD medium such as the Quark–Gluon Plasma. Thus, by employing JEWEL with both the default configuration (Glauber initial conditions coupled to Bjorken hydrodynamic model), and a more realistic medium description (T$_\mathrm{R}$ENTo initial conditions with the (2+1)D hydrodynamic evolution of v-USPhydro), we can simulate quenched jets.
Each jet is represented as a sequential trajectory along the declustering tree, characterized by four substructure observables ($z$, $\Delta R$, $k_\perp$, $m_{inv}$) at each splitting, which we analyze using supervised machine learning architectures: Long Short-Term Memory (LSTM) networks and Transformers.
Our results show that the machine learning models trained in this work have accuracies and AUC scores greater than 95%. In addition, the trained models seem to be sensitive to medium properties that are not obvious in global observables, demonstrating the potential of ML for probing the Quark-Gluon Plasma.

Speaker: Leonardo Lima Da Silva (Universidade de Sao Paulo (USP) (BR))

ICHEP_slides.pdf

3:30 PM Jet formation time as a probe for colour decoherence

Motivated by the apparent tension between the absence of jet quenching in small systems and the observation of azimuthal anisotropy in the distribution of high-$p_\perp$ particles, our study (arXiv: 2510.11914) investigates jet formation time ($\tau_f$) as an observable to probe early medium effects in small systems. It was shown that $\tau_f$ is sensitive to the presence of a medium even when there is only a single, very early and very soft interaction that breaks the colour coherence of the partonic system produced in the hard scattering, without inducing any energy loss. Our findings show that the resulting shift in the formation-time distribution due to decoherence is not only potentially measurable, but arises purely from the loss of colour coherence. In other words, jet formation time allows us to disentangle energy loss from coherence breaking, even in cases where both mechanisms would individually produce the same signal in $R_{AA}$. Furthermore, we extend this analysis by progressively introducing energy loss to identify when and how it begins to influence jet formation time. These results suggest that this observable is a powerful probe of medium effects in small collision systems.

Speaker: Chiara Le Roux

chiara_formationtime.pdf

3:45 PM Challenges towards increasing precision in the structure and evolution of parton showers

Recent studies have provided growing evidence that, in the presence of a dense QCD medium, parton showers can be meaningfully interpreted as physical objects. These works have highlighted the role of emission ordering variable and formation-time effects in shaping medium-induced modifications of jet observables. As a consequence, improving the perturbative accuracy of jet quenching calculations and going beyond leading-logarithmic descriptions has become an essential step towards a quantitative and physically consistent interpretation of medium properties.

In this contribution, we present the first implementation of medium-modified parton showers that consistently combines next-to-leading order (NLO) corrections with leading-logarithmic (LL) resummation. We show that NLO corrections lead to sizeable modifications in the effective value of the jet transport coefficients, such as \hat q, with important consequences for jet quenching phenomenology and for comparisons between different theoretical frameworks.

These results constitute a step towards precision jet quenching calculations, where perturbative accuracy and the space–time structure of parton showers must be treated on the same footing.

Speaker: Liliana Apolinario (LIP (PT))

LApolinario.pdf

2:30 PM → 4:15 PM Astroparticle Physics and Cosmology

Convener: Ruben Conceição (Laboratory of Instrumentation and Experimental Particle Physics (PT))

2:30 PM Mass composition of ultra-high-energy cosmic rays at the Pierre Auger Observatory

We present results on the mass composition of ultra-high-energy cosmic rays based on 17 years of data from the Pierre Auger Observatory. Measurements from the Fluorescence Detector of the average depth of shower maximum (Xmax) and the shower-to-shower fluctuations of Xmax provide evidence for a transition from a lighter to a heavier and less mixed composition above 10^18.4 eV. This transition is further characterized through fractional abundances of four primary mass groups (p, He, CNO, Fe), obtained from fits to Xmax distributions using post-LHC hadronic interaction models. These results show a progressive depletion of the proton component up to around 10^18.7 eV. By splitting the data into northern and southern sky regions at a declination of -15.7 degrees, we find no evidence for a declination dependence of the mass composition within the exposure of the Observatory. Additional constraints are obtained from the correlation between Xmax and the Surface Detector signal, allowing us to exclude pure compositions and mixtures of neighboring mass groups below 10^18.7 eV. Finally, machine learning applied to Surface Detector data enables Xmax inference with substantially increased statistics, corroborating fluorescence measurements and revealing indications of additional features in the energy evolution of Xmax above 10^18.5 eV.

Speaker: Carlos José Todero Peixoto (Universidade de São Paulo)

Presentation_ICHEP26.pdf

2:45 PM ALPACA: a new air shower array experiment for ultra-high-energy gamma-ray astronomy in the southern hemisphere

Andes Large-area PArticle detector for Cosmic-ray physics and Astronomy (ALPACA) is an air shower array experiment that will begin ultra-high-energy (UHE) gamma-ray observations in the southern sky in 2027. Its surface air shower array will cover an area of 83,000 m$^2$. Another detector component, an underground water Cherenkov-type muon detector array will cover an area of 3,600 m$^2$ to reduce the background cosmic-ray noise to less than a 0.1% level in the UHE gamma-ray observation. The prototype experiment ALPAQUITA, a surface air shower array with an area of 18,000 m$^2$, has been stably taking data since September 2022. The ALPAQUITA data is now analyzed to validate the performance of the experiment, and also to study physics, such as the measurement of the cosmic-ray spectrum and the Forbush decrease due to an extreme solar flare that happened in May 2024. Moreover, the muon detectors are under construction since November 2025, and the observation sensitive to UHE gamma rays will be started in 2026 with an extended prototype array equipped with a muon detector of a 900 m$^2$ area. Our presentation will detail the experiment’s concept, the current situation of the detector construction, and the results of the data analysis of ALPAQUITA.

Speaker: Sei Kato (Institut d'astrophysique de Paris)

katosei-ICHEP2026-ALPACA-oral-ver2.pdf

3:00 PM Latitudine dependence of Forbush events observed with the detectors of the Extreme Energy Events Project

Various Forbush events, a sudden decrease in the flux of galactic cosmic rays typically associated with intense solar flares and coronal mass ejections, have been observed by the detectors of the Extreme Energy Event (EEE) project. The network is composed of several telescopes utilizing diverse technologies, namely MRPC chambers and scintillators, situated across Italian territory, CERN, and Ny-Ålesund in the Svalbard archipelago. The characteristics of the network allow the observation of Forbush events with different technologies, in a wide range of latitude, and in different regions of Earth’s geomagnetic cutoff. In this contribution, the first results of the study of the latitude dependence of the Forbush decreases measured by the EEE detectors are presented.

Speaker: Cristina Ripoli (University of Salerno)

ICHEP_2026_CRipoli.pdf

3:30 PM The Radio Detector at the Pierre Auger Observatory

The Pierre Auger Observatory is the largest cosmic-ray detector in the world, with an instrumented area of 3000 km2, profiting from hybrid measurements from fluorescence telescopes, a ground array of water-Cherenkov stations, scintillator detectors, and radio antennas. The Radio Detector (RD), consisting of 1660 radio antennas, records the radio-frequency signals emitted from the cosmic-ray-induced air showers in the frequency range from 30-80 MHz. Its deployment was finalised in November 2024 and it has been stably operational since. The RD measurements enable the study of air showers with zenith angles above 65° degrees and the investigation of new radio reconstruction techniques. When coupled with the water-cherenkov detector, it opens a new landscape in cosmic-ray mass composition analyses. We present an overview of the Radio Detector: its scientific goals, current status, and first measurements.

Speaker: Beatriz de Errico (Universidade Federal do Rio de Janeiro)

deErrico_ICHEP2026.pdf

3:45 PM Could a Primordial Black Hole Explosion Explain the Extremely High-Energy KM3NeT Neutrino Event?

A black hole is expected to end its lifetime in a cataclysmic runaway burst of Hawking radiation, emitting all Standard Model particles with ultra-high energies.
Thus, the explosion of a nearby primordial black hole (PBH) has been proposed as a possible explanation for the $\sim 220$~PeV neutrino-like event recently reported by the KM3NeT collaboration.
If the event originated from a PBH, the source would need to lie at $(1\!-\!7)\times10^{-5}\,\mathrm{pc}$—depending on the assumed effective area—thus within the Solar System.
At such proximity, the resulting flux of gamma rays and cosmic rays would be detectable at Earth.
By incorporating the time-dependent field of view of gamma-ray observatories, we show that LHAASO should have recorded ${\cal O}(10^8)$ events between fourteen and seven hours prior to the KM3NeT detection.
IceCube and KM3NeT \textit{itself} should likewise have detected of order a few hundred events in the range $1~\mathrm{TeV}\!\lesssim\!E_\nu\!\lesssim\!1~\mathrm{PeV}$ during the 24 hours preceding the burst.
The absence of any such multi-messenger signal, particularly in gamma-ray data, strongly disfavors the interpretation of the KM3-230213A event as arising from evaporation in a minimal four-dimensional Schwarzschild scenario.

Speaker: Lua Figueiredo Trava Airoldi (Institute of physics of the University of São Paulo)

animation_eff_areas.mov

Timeline project-1.pdf

2:30 PM → 4:15 PM Detectors for Future Facilities, R&D and Novel Techniques (including Quantum Sensors)

Conveners: Ulisses De Freitas Carneiro Da Graca (CBPF - Brazilian Center for Physics Research (BR)), Ginger Cheng (Nikhef National institute for subatomic physics (NL))

2:30 PM The NEXT experiment for neutrinoless double beta decay searches - Future Prospects

Neutrinoless double beta decay experiments try to establish whether neutrinos are their own antiparticles by searching for an ultra-rare radioactive process with a half-life that may be longer than $10^{27}$ years. A discovery would have major implications for particle physics and cosmology, but requires tonne-scale detectors with backgrounds below 1 count per tonne per year. This poses a formidable technical challenge that has prompted a diverse and dynamic worldwide experimental effort. The NEXT Collaboration uses a high pressure xenon gas time projection chamber with electroluminescent amplification, which offers excellent energy resolution, particle tracking for background suppression and scalability to large source masses. While this approach is being validated on smaller scales, I will discuss the current prospects to reach the tonne-scale goal. A future tonne-scale detector will employ a barrel of wavelength-shifting fibres for light detection, whose efficacy is being investigated right now. Machine learning techniques can be used to improve background rejection. And finally, it will be augmented with single molecule fluorescent imaging detectors for barium tagging — to explore $0\nu\beta\beta$-decay half-lives up to $10^{28}$~years.

Speaker: Fabian Kellerer (Instituto de Física Corpuscular (IFIC))

ICHEP26_NEXTfuture_FabianKellerer.pdf

2:45 PM Technologies for a Future Neutrino Mass Experiment with Tritium

At the end of 2025, KATRIN (KArlsruhe TRItium Neutrino) experiment reached its desired goal of 1000 days of measurement, allowing the electron anti-neutrino mass to be constrained to a value in the vicinity of 0.3 eV. Going beyond this limit, and eventually excluding the inverted mass ordering, is the task of future experiments.
Achieving these ambitious goals requires a paradigm shift in the experimental approach, necessitating development of new and scalable technologies. In particular, a combination of an ultra-high resolution differential detection method together with a high-luminosity atomic-tritium source shows a promising path forward.
Building upon the success of the KATRIN experiment, in the following years we plan to develop a quantum-sensor-array and atomic-tritium demonstrators, making use of the existing KATRIN and TLK (Tritium Laboratory Karlsruhe) infrastructure.
In this talk, we present the status of our R&D efforts towards development of these new technologies for KATRIN++, as a next-generation neutrino mass experiment with tritium.
We will show the preliminary sensitivity studies and present the results of our first characterization campaigns. We will show the status of development of the atomic-tritium source as well as our plans for the proof-of-principle measurements of the tritium $\beta$-spectrum with an ultra-high resolution cryogenic micro-calorimeters.

Speaker: Neven Kovac (Institute for Astroparticle Physics, Karlsruhe Institute of Technology)

KATRIN++_ICHEP_2026.pdf

3:00 PM Ultra-High Resolution Electron Spectroscopy with Next-Generation Cryogenic Microcalorimeters

Determination of the absolute neutrino mass scale has been one of the main challenges in modern physics ever since the discovery of neutrino oscillations at the end of last millennium. Although oscillation experiments showed that neutrinos have a non-vanishing mass, they provide no information on the absolute mass scale, and a different, more direct, approach is required.
With the KATRIN experiment reaching its desired goal of 1000 days of measurement, allowing the neutrino mass to be constrained to to a value in the vicinity of 0.3 eV, focus of the future experiments is to go beyond the inverted-mass ordering and and eventually excluding it.
In this regard, development of new detector technologies is of utmost importance, with quantum-sensor-arrays currently being the front runners due to their exceptional performance and excellent energy resolution.
With this poster, we present our ongoing efforts to develop large-area cryogenic micro-calorimeter arrays, to bring the ultra-high resolution electron-spectroscopy to the next level, as a basis for the next-generation neutrino mass experiment with tritium, KATRIN++.
We present the results of our first characterization campaigns with the $\mathrm{^{83}Rb/^{83m}Kr}$ radioactive source, and discuss our on-going efforts towards the proof-of-principle measurements of the tritium $\upbeta$-spectrum, using a novel tritium-graphene source.

Speaker: Neven Kovac (Institute for Astroparticle Physics, Karlsruhe Institute of Technology)

MMC_ICEHP_2026.pdf

3:15 PM Towards High-Resolution Spectroscopy of Low-Energy Electrons with Transition-Edge Sensors in the PTOLEMY Experiment

Transition-edge sensors (TESs) are thin superconducting films operated close to their critical temperature (T_c), which have been employed as micro-calorimeters with excellent intrinsic energy resolution in the detection of photons. Recent works have explored their potential for the detection of electrons. This is a key point for the PTOLEMY experiment, which plans to measure low-energy electrons with a TES array to detect the Cosmic Neutrino Background, and to measure the neutrino mass. To achieve this, an energy resolution (FWHM) of ~120 meV on electrons with a kinetic energy of 10 eV is needed. The setup at INRiM (Istituto Nazionale di Ricerca Metrologica), in Italy, which uses a cold electron source based on field emission from carbon nanotubes, coupled with gold/titanium TES devices with T_c ~ 90 mK, has detected single electrons in the 100 eV energy range with an energy resolution compatible with that of photons of the same energy. In our new results, we have drastically reduced partially-absorbed electrons achieving a FWHM about 20 times better than in previous measurements. This represents a major milestone in the development of high-precision electron spectroscopy with TES devices. We will further discuss the next steps towards achieving the PTOLEMY resolution goal.

Speaker: Benedetta Corcione (Sapienza University of Rome)

ICHEP2026_Corcione.pdf

3:30 PM Guide Tube Calibration System for JUNO Experiment

The Jiangmen Underground Neutrino Observatory (JUNO) primarily aims to determine the neutrino mass ordering with 3σ significance within six years. It features the world's largest liquid scintillator detector, where the key challenge lies in controlling the energy scale uncertainty, which is dominated by the spatially non-uniform response, particularly near the detector boundary where complex structures introduce significant non-uniformity. To directly map the boundary response, we have developed an ultra-long (>100 m) Guide Tube Calibration System (GTCS). A source positioning scheme with an angular precision better than 0.2° has been achieved, a dedicated peak-extraction algorithm for spectra where full-energy peaks are strongly overlapped with Compton Plateau has been developed and the complete energy response curve can be obtained from a limited set of calibration points. In August 2025, the GTCS was tested on-site, confirming reliable positioning, data acquisition, and long-distance operation. The GTCS provides the direct in-situ measurements necessary to construct a precise edge non-uniformity correction function, which is a critical input for JUNO’s global energy scale model. The GTCS will provide essential calibration support for JUNO’s physics exploration.

Speaker: Prof. Qingmin Zhang

ICHEP2026_Guide Tube Calibration System for JUNO Experiment.pdf

ICHEP2026_Guide Tube Calibration System for JUNO Experiment.pptx

3:45 PM Time Resolution Studies of Silicon Sensors at the Sirius Synchrotron

High-precision silicon detectors for future high-rate experiments require the combination of excellent spatial resolution with precise time tagging of particle hits. Time resolutions at the level of a few tens of picoseconds are essential to mitigate high occupancies and to enable accurate track-to-vertex association in dense experimental environments.

The characterization of sensor technologies capable of delivering such performance relies on dedicated experimental setups with well-controlled timing conditions. Testbeam facilities providing short and stable bunch structures are therefore crucial to assess the intrinsic temporal response of silicon sensors and their readout electronics.

In this context, the Brazilian synchrotron Sirius offers a unique environment to study the temporal performance of silicon detectors. The accelerator delivers x-ray beams to the device under test at a repetition rate of 500 MHz, in with which each bunch can be tagged with a jitter of 8$\,$ps and a length of same magnitude.

This work presents the experimental setup used at Sirius to measure the time resolution of both a Low Gain Avalanche Detector(LGAD) and a planar silicon sensor with Timepix4 readout ASICs. Results from the testbeam campaign conducted in September 2025 are presented, together with the observed timing performance and its experimental limitations.

Speaker: Alexandre Cardoso Campos (Federal University of Rio de Janeiro (BR))

Time Resolution Studies of Silicon Sensors at the Sirius Synchrotron.pdf

2:30 PM → 4:15 PM Artificial Intelligence, Machine Learning and Quantum Computing in HEP

Convener: Prof. Ying-Ying Li (IHEP)

2:30 PM Inclusive Multivariate Isolation for LHCb Run 3

During Run 3, the LHCb experiment operates at an instantaneous luminosity approximately five times higher than in Run 2, leading to a substantial increase in event multiplicity and data volume. Each proton–proton collision produces hundreds of tracks, while only a small fraction corresponds to the signal. To reduce event size without compromising physics performance, LHCb has developed inclusive isolation tools that retain only the information relevant for detailed offline analysis. Among these, the Inclusive Multivariate Isolation (IMI) algorithm is designed to robustly separate signal tracks from high-pileup background across a wide range of decay topologies and kinematic regimes. Deployed in both the High-Level Trigger and offline reconstruction, IMI combines traditional isolation concepts with multivariate techniques, achieving a 45% reduction in total data size while maintaining signal efficiencies above 99%. Its stability and robustness have been validated under real data-taking conditions. Looking ahead to the future LHCb environment at even higher luminosities, new methods, including more sophisticated techniques such as graph neural networks, will be developed for the signal reconstruction of beauty decays. This contribution is based on arXiv:2511.11487, which is accepted for publication on EPJC.

Speaker: Tommaso Fulghesu (Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France)

IMI_Run3_Fulghesu-4.pdf

2:45 PM ML-based $B$ meson flavour tagging at LHCb

The precise determination of the initial flavour of neutral B mesons is crucial for time-dependent measurements of CP violation and mixing parameters, where it directly constrains the ultimate physics sensitivity. Leveraging the unprecedented data set of Run 3 and capitalizing on modern algorithmic advances, the LHCb collaboration has undertaken a comprehensive redesign of its flavour tagging (FT) algorithms. This new system extensively exploits state-of-the-art machine learning techniques, including advanced deep neural network architectures, to optimally combine information from diverse tagging particles. This contribution presents the novel FT strategy, detailing the machine learning frameworks and showcasing the resulting performance gains that pave the way for next-generation precision measurements in heavy-flavour physics.

Speaker: Peilian Li (University of Chinese Academy of Sciences)

ICHEP26_FlavourTaggingatLHCb_PeilianLi.pdf

3:00 PM Graph Neural Network–based Energy Reconstruction for the LHCb Upgrade II Electromagnetic Calorimeter

The High-Luminosity upgrade of the LHC will increase the collision rate by a factor of five, leading to extremely dense environments with a large number of overlapping proton–proton interactions. In this context, the LHCb Upgrade II and its next-generation electromagnetic calorimeter, PicoCal, face major challenges in the accurate reconstruction of photons, electrons, and neutral pions, which are essential for precision measurements. We present a novel Graph Neural Network (GNN)–based reconstruction approach in which clusters of calorimeter cells are represented as graphs. By learning directly from cell-level information, the model suppresses pile-up contributions and significantly improves the energy resolution with respect to current standard reconstruction techniques. By learning detector effects such as energy leakage and shower development directly from data, the approach removes the need for explicit, hand-crafted correction procedures typically used in baseline methods. In addition, a lightweight, attention-enhanced architecture based on GarNet is explored, achieving comparable performance while reducing the inference time by up to a factor of eight. Further acceleration strategies, including student–teacher training and graph-to-MLP compression, demonstrate the potential of these approaches for real-time reconstruction in future LHC runs, including the upcoming Run 4, and in future high-luminosity collider environments.

Speaker: Wren Vetens (Syracuse University (US))

Vetens_LHCb_PicoCal_GNN_ICHEP2026.pdf

3:15 PM Physics prospects with GNN-based Full Event Interpretation at LHCb

The increasing luminosity at the Large Hadron Collider challenges event reconstruction and data selection at LHCb due to rising particle multiplicities, enhanced combinatorial backgrounds, and stringent constraints on trigger latency and data storage. To address these limitations, the deep-learning–based Full Event Interpretation (DFEI) framework is being developed at LHCb, aiming at the simultaneous identification, isolation, and hierarchical reconstruction of all heavy-hadron decay chains in a collision event. DFEI represents events as graphs and exploits Graph Neural Networks (GNNs) to leverage global event context, going beyond traditional decay-mode–specific reconstruction strategies. Recent developments include heterogeneous GNN architectures with integrated graph pruning and multi-task learning, enabling scalable inference while maintaining or improving reconstruction performance in dense environments. In this contribution, we discuss physics-oriented applications of DFEI based on simulated datasets, with emphasis on decay-mode–inclusive analyses, automated background suppression, and topological characterization. We also outline ongoing and future developments, including prospects for incorporating neutral particles and for integrating DFEI into the LHCb software stack, with the goal of enabling holistic event interpretation both at the trigger and analysis levels.

Speaker: Elena Graverini (University of Pisa (IT) and EPFL - Ecole Polytechnique Federale Lausanne (CH))

hello.pdf

3:30 PM A graph-neural network for full event interpretation of heavy hadrons at FCC-ee

The large samples of Z0 bosons expected at the potential Future Circular Collider (FCC-ee) will provide an unprecedented environment for precision flavour physics. In this context, the ability to reconstruct heavy-hadron decay chains with high efficiency and purity is essential to fully exploit the physics potential of the experiment, enabling improved measurements of rare decays, CP violation, and heavy-flavour fragmentation properties.

A promising strategy is the use of a Deep-learning based Full Event Interpretation (DFEI), designed to perform the simultaneous identification, isolation, and hierarchical reconstruction of all heavy-hadron decay chains in each event. Such an approach goes beyond traditional reconstruction pipelines by directly targeting global event interpretation, combining tracking, vertexing, and decay topology information in a unified framework.

In this work, we present a proposal for a graph neural network (GNN) architecture tailored to FCC-ee conditions using IDEA detector simulation, aimed at achieving full heavy-hadron reconstruction through an end-to-end learning strategy. The proposed method exploits the natural graph structure of particle collisions, enabling the reconstruction of complex multi-body decay chains.

Speaker: Samuel Morand (EPFL - Ecole Polytechnique Federale Lausanne (CH))

ICHEP26_pres.pdf

3:45 PM Quantum Fourier Integration of Decay Rates at NLO Accuracy

We present the first quantum computation of a total decay rate in high-energy physics at second order in perturbative quantum field theory. This work underscores the confluence of two recent cutting-edge advances. On the one hand, the quantum integration algorithm quantum Fourier iterative amplitude estimation, which efficiently decomposes the target function into its Fourier series through a quantum neural network before quantumly integrating the corresponding Fourier components. On the other hand, causal unitary in the loop-tree duality (LTD), which exploits the causal properties of vacuum amplitudes in LTD to coherently generate all contributions with different numbers of final-state particles to a scattering or decay process, leading to singularity-free integrands that are well suited for Fourier decomposition. We test the performance of the quantum algorithm with benchmark decay rates in a quantum simulator and in quantum hardware, and find accurate theoretical predictions in both settings

Speaker: DAVID FRANCISCO RENTERIA ESTRADA (IFIC UV-CSIC)

ichep2026_v3.pdf

4:00 PM Quantum-Enhanced Graph Neural Networks for Particle Tracking

Graph Neural Networks (GNNs) are increasingly used for particle tracking in High Energy Physics (HEP), as they provide a natural framework for modeling the relational structure of detector hits. In parallel, recent developments in quantum computing have motivated the exploration of quantum machine learning techniques, which may offer enhanced expressive power through quantum superposition and entanglement. However, the impact of quantum-enhanced models on realistic HEP tracking tasks remains largely unexplored.

In this contribution, we study a hybrid GNN architecture that incorporates variational quantum circuits for edge classification in particle tracking. Quantum layers are embedded within a multilayer perceptron acting on graph edges, and the number of qubits and circuit depth are systematically varied to assess scalability and model expressiveness within the constraints of near-term quantum devices. The hybrid approach is compared to a purely classical GNN with an otherwise identical architecture. Model performance is assessed using standard tracking metrics, including accuracy, F1 score, AUC–ROC, as well as computational cost in terms of training time, inference time, and parameter count.

This study provides a systematic comparison of classical and quantum-enhanced GNN architectures for particle tracking, and establishes a benchmark for future investigations of quantum machine learning methods in HEP reconstruction workflows.

Speaker: Santosh Parajuli (Univ. Illinois at Urbana Champaign (US))

QGNN_ICHEP_Talk.pdf

2:45 PM → 4:15 PM Equity, Diversity and Inclusion

Convener: Flavia de Almeida Dias (Nikhef National institute for subatomic physics (NL))

DiscussionSession.pdf

2:45 PM Elementary Particles Card Game as an Inclusive Tactile Introduction to the Standard Model

Astrophysics and particle physics are often taught through highly visual representations, which can unintentionally exclude students with visual impairments. To address this gap, we developed an inclusive educational resource that enables visually impaired, low vision, and sighted learners to participate together through tactile and Braille design. By expanding access to foundational STEM concepts and supporting equitable classroom and outreach practices. We present the Elementary Particles Card Game, a hands-on activity that introduces the Standard Model using an accessible deck in which each card represents an elementary particle and encodes its identity through tactile and Braille elements, complemented by high contrast visual cues. The game is designed for group interaction and can be played in two modes, collection and shedding, with clear rules for forming particle combinations that mirror the Standard Model structure. As an outcome, the card game provides an engaging, low-cost, and scalable pathway to teach modern physics in inclusive environments, from schools to science museums and public outreach. The kit is part of a broader accessibility effort, and distribution and access information will be made available to support adoption, adaptation, and wider impact across educational contexts.

Speaker: Prof. Rita de Cassia Dos Anjos (UFPR)

ICHEP_Particle_Card_Game.pdf

3:00 PM Women in Technology at CERN: A Grassroots Community Growing With Purpose

The Women in Technology (WIT) community at CERN started in 2016 as an informal, volunteer-led initiative to connect and support interdependent scientists across departments and universities. What began as a few people sharing experiences has grown into an active and inclusive grassroots network that remains open to all, regardless of gender, and focused on support, mentoring, and awareness-raising.
In 2025, WIT counted around 700 members and ran its eighth yearly mentoring programme with nearly 80 mentor–mentee pairs, and led a range of activities from high school outreach, participation to events,organised by non-profit association dedicated to providing STEM experiences for young girls and experiment visits, including underground detectors visits to book clubs and leadership roundtables. WIT also collaborated with CERN’s official D&I structures, contributing to efforts like improving harassment response systems and advocating for visibility and retention of women in STEM.
Still entirely volunteer-run, WIT continues to rely on the energy and commitment of its members. This contribution will share how the community is structured, trace the history of the WIT community, and illustrate the variety of its activities and their impact over nearly a decade, highlighting how small, consistent actions can help shape more inclusive culture within large scientific organisations.

Speaker: Emanuela Musumeci (University of Alabama (US))

WIT_ICHEP_2026_Presentation_Musumeci.pdf

3:15 PM Inclusive Astroparticle Outreach at the Pierre Auger Observatory

The Pierre Auger Observatory combines frontier research on ultra-high-energy cosmic rays with outreach activities increasingly guided by diversity, equity, and inclusion objectives. Recent efforts at the Visitor Center in Malargüe have focused on making science accessible to audiences traditionally underrepresented in STEM. The group has created interactive modules for blind and deaf visitors, featuring Braille labels, tactile models of extensive air showers, and 3D-printed representations that invite hands-on discovery. Direct engagement with schools serving blind and neurodiverse students has enabled the adaptation of educational content and formats to diverse learning needs. Concurrently, the Observatory strengthens the participation and visibility of women and girls in science. Activities celebrating the International Day of Women and Girls in Science (February 11) and International Women’s Day (March 8) are complemented by outreach videos showcasing women physicists within the Collaboration. Early-career researchers have also taken the lead in organizing forums that address persistent structural barriers and explore ways to foster a more equitable academic and research environment. These initiatives demonstrate how Auger's outreach program integrates astroparticle physics with inclusive practices that expand participation and connect local and international communities.

Speaker: Prof. Rita de Cassia Dos Anjos

Auger_Inclusive_Outreach_ICHEP2026.pdf

3:30 PM Gender and racial inequalities in CNPq fellowships in Physics and Astronomy

Gender and racial inequalities in Brazilian science have been widely discussed, particularly regarding access to opportunities and academic recognition. This study analyzes the distribution of fellowships awarded by the Brazilian National Council for Scientific and Technological Development (CNPq) in Physics and Astronomy, using data from the 2025 CNPq Funding Panel. Individuals who did not declare race were excluded (325 of 1,908 fellowships). The Black population is defined as the combined categories Black (Preta) and Parda. The analysis included Junior Scientific Initiation, Scientific Initiation, Junior and Senior Postdoctoral, and Research Productivity fellowships. Master’s and PhD fellowships were excluded because graduate training in Brazil is largely funded by other agencies. Black researchers represent 46.6% of Junior Scientific Initiation and 51.2% of Scientific Initiation fellowships, indicating strong participation at early stages. However, their presence declines at higher levels, reaching 24.6% of Research Productivity fellowships. Intersectional analysis shows that Black women are concentrated in early modalities, accounting for only 3.6% of Research Productivity fellowships. In contrast, White men hold 57.2% of Research Productivity fellowships. These findings highlight persistent structural barriers affecting the academic advancement of Black researchers, particularly Black women.

Speaker: SENDY NASCIMENTO

ICHEP2026_Natal_Sendy.pdf

3:45 PM Joint Education & Outreach / Equity, Diversity and Inclusion discussion session

We will use this time to discuss the actions, issues and ideas presented in the Education and Outreach and the Equity, Diversity and Inclusion sessions, including the common goals and challenges of these efforts.

• How to increase the visibility of under-represented groups
• Combat misoginy and bigotry in social media posts
• Overcoming under-funding, difficulty to find presenters, visa problems, and cancellations.
• Success stories of people that got support, grants (quotas), visa

Speakers: Clemencia Mora Herrera (CBPF - Brazilian Center for Physics Research (BR)), Flavia de Almeida Dias (Nikhef National institute for subatomic physics (NL)), Prof. Freya Blekman (Deutsches Elektronen-Synchrotron (DE)), Sandra Padula (UNESP - Universidade Estadual Paulista (BR))

DiscussionSession.pdf

4:15 PM → 4:45 PM Coffee break

4:45 PM → 6:30 PM Neutrino Physics

Conveners: Cristovao Vilela (Laboratory of Instrumentation and Experimental Particle Physics (PT)), Júlia Tena Vidal

4:45 PM Neutrino oscillations with 10 years of NOvA data

NOvA is a long‑baseline neutrino oscillation experiment that uses a one‑megawatt‑capable NuMI beam from Fermilab and two functionally identical scintillator tracking calorimeter detectors. The near detector is placed at Fermilab and the 14-kton far detector is located 810 km away in Ash River, Minnesota. Both detectors have a highly active, finely segmented design that offers excellent event identification capability. NOvA’s primary physics goals include measuring muon‑neutrino disappearance and electron‑neutrino appearance (and their antineutrino counterparts) as functions of energy, in order to determine neutrino mass‑squared differences and PMNS mixing parameters. In this talk, the latest NOvA results will be shown which incorporate the 10 year dataset and deliver updated measurements of neutrino and antineutrino oscillation channels, refining the current understanding of neutrino oscillations.

Speaker: Liudmila Kolupaeva (Joint Institute for Nuclear Research (RU))

nova.pdf

5:00 PM Searching for Reactor Antineutrinos in Super-Kamiokande

The Super-Kamiokande (SK) detector, a 50-kiloton water Cherenkov detector in Japan’s Kamioka mine, has played a central role in neutrino physics since 1996, observing solar, atmospheric, and accelerator neutrinos. With the addition of gadolinium (SK-Gd), SK has significantly enhanced its sensitivity to low-energy electron antineutrinos through efficient neutron tagging, enabling searches for reactor antineutrinos originating primarily from Japanese nuclear power plants. The Wide-band Intelligent Trigger (WIT) is a real-time computing system with approximately 900 hyper-threaded CPU cores that plays a key role in extending SK’s sensitivity to low-energy events. WIT processes data in 23 ms windows, employing advanced vertex reconstruction and background rejection techniques to reliably identify events with recoil electron energies down to 2.5 MeV. We report results from reactor antineutrino searches in SK using WIT data, representing one of the first such measurements in a large water Cherenkov detector and providing complementary constraints on neutrino oscillation parameters, including sin²θ₁₂ and Δm²₂₁.

Speaker: Dr Lucas Nascimento Machado (University of Glasgow)

Searching_reactors_nuebar_SuperK.pdf

5:15 PM Reactor antineutrino oscillation analysis after few months of operation of JUNO

The Jiangmen Underground Neutrino Observatory (JUNO) experiment is a multi-purpose neutrino experiment, located at south China. JUNO’s primary goals are to determine the neutrino mass ordering (NMO) and to measure the neutrino oscillation parameters (sin$^{2}\theta_{12}$, $\Delta m^{2}_{21}$ and $\Delta m^{2}_{31}$) with high precision through observations of reactor antineutrinos.
The JUNO main detector consists of a 20-kton liquid scintillator central detector (CD), surrounded by a water pool that serves as a muon veto system and shields CD from radioactivity, and an external plastic-scintillator Top Tracker. Following more than ten years of detector construction and eight-month commissioning phase, JUNO started the physics data taking in the end of August 2025, and released the first physics results in November.
This talk will focus on the oscillation analysis results with reactor antineutrinos after few months of operation.

Speaker: Zhiyuan Chen (Institute of High Energy Physics, Chinese Academy of Sciences)

JUNO_reactor_oscillation_chenzy.pdf

5:30 PM Neutrino Physics with the DUNE Experiment

The Deep Underground Neutrino Experiment (DUNE) is a next-generation long-baseline neutrino oscillation experiment under construction at the Sanford Underground Research Facility (SURF) in South Dakota, USA. It aims to probe the three-flavor neutrino framework with unprecedented precision, determining the neutrino mass ordering and measuring charge–parity (CP) violation in the lepton sector. In addition, DUNE will study neutrinos from astrophysical sources and search for physics beyond the Standard Model.
The experiment comprises a near detector complex at Fermilab and a far detector array located 1,300 km away and 1.5 km underground at SURF. The far detector will consist of four liquid argon time projection chamber (LArTPC) modules, each with a fiducial mass of about 10 kilotons, exposed to a high-intensity broad-band neutrino beam initially powered at 1.2 MW and upgradeable beyond 2 MW, significantly enhancing the experiment’s sensitivity.
Two large-scale ProtoDUNE LArTPCs, each with a mass of about 770 tons, have been successfully operated at CERN, validating the technology and providing key performance and operational experience.
This presentation will review the status and recent advancements of the DUNE experiment and the ProtoDUNE program, outline the primary physics objectives, and discuss the next steps toward full experimental deployment and operation.

Speakers: Francesco Di Capua (Istituto Nazionale di Fisica Nucleare (INFN)), Francesco Di Capua (Universita di Napoli Federico II (IT))

DUNE_ICHEP2026.pdf

5:45 PM T2K Neutrino Oscillation Analysis

T2K is a long-baseline experiment for the measurement of neutrino and antineutrino oscillations. (Anti)neutrinos are produced by the J-PARC accelerator and measured at the ND280 near detector, and then at the Super-Kamiokande far-detector, in Kamioka. The most recent results of neutrino oscillations will be presented, featuring world-leading sensitivities on the search of Charge-Parity violation, by comparing oscillation measurements of neutrinos and antineutrinos. Measurements of the neutrino oscillation parameters are extracted from the rate of muon neutrino disappearance and electron neutrino appearance. The results include data collected with first Gd-loading at the far detector, which required a revision of the selection strategy and systematic uncertainties modelling the detector response. Plans for future data taking will be discussed.

Speaker: Lorenzo Restrepo

T2K_oscillation_analysis_ICHEP2026.pdf

6:00 PM Measuring Long Baseline Neutrino Oscillations in the Hyper-Kamiokande Experiment

The Hyper-Kamiokande (HyperK) experiment is a long baseline neutrino oscillation experiment currently under construction in Japan. It aims to provide world leading measurements of neutrino oscillation parameters, including definitively answering the question of whether neutrino oscillations violate CP symmetry.

HyperK will measure the oscillated and un-oscillated flavour composition of a neutrino beam produced at the JPARC accelerator complex. The comparison of these will allow for a precise measurement of the parameters of the PMNS matrix.

HyperK will make use of a number of near detectors in order to constrain systematic uncertainties relating to the initial neutrino flux, and to the modelling of neutrino-nucleus interactions. The ND280 detector sits 280m downstream of the neutrino production target and will be inherited from the T2K experiment. A new intermediate detector, IWCD, is also being constructed for HyperK which will sit 1km away from the beam production point. The constraints on systematic uncertainties from these detectors will be crucial for HyperK to achieve it's physics goals.

This talk will describe the techniques used to analyse data from these detectors, along with the HyperK far detector, in order to measure neutrino oscillation parameters. Projected sensitivities of HyperK to these parameters will be shown.

Speaker: Ewan Miller

HK Oscillation Analysis ICHEP 2026 Talk - Ewan Miller.pdf

4:45 PM → 6:30 PM Dark Matter

Convener: Prof. Roberto Lineros

5:15 PM The post-Newtonian expansion of general relativity and the evidence for dark matter

We examine the validity of the post-Newtonian expansion of general relativity, and argue that it could break down even for weak fields and small velocities, provided the system in question is composed by many degrees of freedom and has considerable angular momentum.
We also give an overview of the different situations where dark matter is favored as an explanation, argue that most, if not all, evidence for dark matter occurs in exactly this regime, and hence argue that a non-local effective expansion of general relativity, different from the post-Newtonian expansion and still not developed,is necessary to ascertain quantitatively the role of dark matter in galactic and cosmological dynamics.
Based on
https://inspirehep.net/literature/2849921

Speaker: Giorgio Torrieri

dmichep.pdf

5:30 PM Dark higher-form portals and duality

Among the crowd of dark matter candidates, light scalar (axions, ALPs, WIMPs …) and vector particles (dark photons) have been the focus of intense theoretical and experimental investigations over the past 15 years. However, those are always described as scalar or vector fields. Instead, we investigate their embedding as antisymmetric rank-three and rank-two tensor fields. By reconciling theoretical investigations, regarding the nature of the dualities relating the standard and tensorial descriptions and their different possible Stueckelberg gauge representations, and phenomenological examinations considering the effective interactions between tensor fields and the Standard Model, we prove these tensor fields to provide a completely distinct framework. This alternative set allows for different couplings and therefore different experimental signatures for the detection or production of dark matter at both low energy and colliders.

Based on Dark higher-form portals and duality (Plantier and Smith, ArXiv :2506.04795) and Dark higher-form couplings to fermionic triangle loops (Plantier and Smith, to appear on ArXiv this week)

Speaker: Cypris Plantier (Laboratoire de Physique Subatomique et de Cosmologie (LPSC))

Natal_12_minutes_talk.pdf

4:45 PM → 6:30 PM Electroweak and Top Quark Physics

Conveners: Matteo Defranchis (CERN), Miguel Ramos Pernas (CERN)

4:45 PM Top-quark properties (excluding top-quark mass) measurements in ATLAS

Due to its large mass, the top quark has properties that make it unique among the other quarks. The large dataset provided by the Large Hadron Collider allows it to measure several properties of the top quarks, such as spin-correlations, with a high precision, providing a crucial test of the Standard Model predictions. This contribution presents the latest measurements of the top quark properties from the ATLAS experiment.

Speaker: Eleanor Jones (Deutsches Elektronen-Synchrotron (DE))

TopProperties_ICHEP_310826.pdf

5:00 PM Recent updates on modelling of ttbar events

Several measurements and searches involving top quarks are limited by the uncertainties related to the modelling of the top-quark pair events. In this contribution, recent updates on the modelling of the top-quark pair events will be discussed. These include the higher order precision in the production using the MiNNLO generator as well as non-resonant and off-shell effect modelled with the bb4l generator. Comparison of the predictions and the ATLAS data will be provided as well as studies of the systematic model for the generators.

Speaker: Timothee Theveneaux-Pelzer (CPPM, Aix-Marseille Université, CNRS/IN2P3 (FR))

ICHEP-2026_07_31-ttbarModelling.pdf

5:15 PM Electroweak and associated top-quark production at CMS

The large center-of-mass energy of the LHC and its total integrated luminosity opens the window to high precision measurements of electroweak and associated production modes of the top quark. These processes are crucial to the study of the couplings of the top quark and the electroweak bosons. In this talk, we present the most recent inclusive and differential measurements of these processes.

Speaker: Alberto Belvedere (ETH Zurich (CH))

Electroweak and associated top-quark production at CMS final.pdf

5:30 PM Multiboson Measurements at CMS

Measurements of processes involving multiboson final states constitute a precision test of the Standard Model. Moreover, discrepancies between theoretical predictions and experimental measurements could hint to new physics through the presence of anomalous gauge couplings. These processes are also dominant backgrounds for Higgs boson measurements, and searches for new particles with diboson final states. The most relevant and recent CMS measurements at 13 and 13.6 TeV will be presented.

Speaker: Justin Marquez (University of Wisconsin (US))

ICHEP_Multiboson_Summary_Final.pdf

5:45 PM Vector boson scattering results in CMS

Vector boson scattering is a key production process to probe the electroweak symmetry breaking of the standard model, since it involves both self-couplings of vector bosons and coupling with the Higgs boson. If the Higgs mechanism is not the sole source of electroweak symmetry breaking, the scattering amplitude deviates from the standard model prediction at high scattering energy. Moreover, deviations may be detectable even if a new physics scale is higher than the reach of direct searches. Latest measurements of production cross sections of vector boson pairs in association with two jets in proton-proton collisions at the LHC are reported using a data set recorded by the CMS detector.

Speaker: Shilpi Jain (Tata Institute of Fundamental Research (IN))

VBS_ICHEP_2026_final.pdf

6:00 PM Diboson precision measurements in ATLAS

Measurement of diboson production enters a precision era along with the accumulation of LHC data and therefore leads to an unprecedented scrutiny of theoretical modelling of the production as well as multiboson interaction vertices. This talk will present the recent precision diboson measurements from ATLAS and discuss the physics impact and prospects.

Speaker: Greg Myers (University of Michigan (US))

ATLAS_DibosonPrecisionMeasurements_GWM.pdf

6:15 PM Measurement of rare electroweak processes (VBS and triboson) in ATLAS

Measurement of rare electroweak processes such as vector boson scattering and triboson provides a unique test of the Standard Model electroweak theory and offers a complementary approach to study the electroweak symmetry breaking as well as anomalous quartic boson interactions. This talk will present the recent measurements in this sector from ATLAS and discuss the physics impact and prospects.

Speaker: Muhammad Alhroob (University of Warwick)

ICHEP_multiboson.pdf

4:45 PM → 6:30 PM Software, Computing and Data Handling

4:45 PM Advances in the ATLAS Fast Simulation Program: Machine Learning, Fast Tracking, and Workflow Integration for Run 4

Monte Carlo (MC) simulation is essential for ATLAS physics analyses, connecting theoretical predictions to detector-level observables. While Geant4 provides highly accurate detector modelling, it is computationally expensive. To enable large MC samples, especially for the High-Luminosity LHC, ATLAS has developed a broad fast simulation program that replaces selected steps with faster approximations.

A key tool is AtlFast3, which combines classical parametrisations with generative machine learning models for fast simulation of electromagnetic and hadronic calorimeter showers. Recent work includes an improved voxelisation scheme for training and exploration of advanced generative approaches such as diffusion models, transformers, and continuous normalizing flows. A new transformer-based generative model using flow-matching techniques was also developed to better model muon punch-through and capture correlations in secondary particle production.

Fast simulation is also being extended to the inner detector. Fast Track Simulation (FATRAS) uses simplified geometries and parametrized electromagnetic interactions, while retaining Geant4 hadronic models, with ongoing R&D focused on improved accuracy and integration with ACTS. Track overlay accelerates pile-up processing by reusing reconstructed pile-up tracks, with updates ensuring consistent tracking and ML-driven runtime steering. These components are integrated in the FastChain framework, unifying simulation and reconstruction into an efficient end-to-end workflow.

Speaker: Marco Valente (CERN)

ATLAS_FastSimulation_MarcoValente.pdf

5:00 PM Electro-magnetic calorimeter shower simulation using machine learning techniques at BESIII experiment

The detailed simulation of electromagnetic calorimeters (EMC) remains computationally intensive due to simulation of millions of secondary particles.
Machine learning offers a promising alternative by bypassing explicit shower simulation, though its accuracy must be rigorously validated.

In this work, we develop fast simulation models for the BESIII EMC using generative adversarial networks (GANs) and diffusion models. Initial experiments with a baseline conditional GAN show limitated accuracy across a broad range of experimental conditions. To improve performance, we integrate a pre-trained generator designed to produce richer conditional inputs, providing more precise guidance for the generation and leading to a significant improvement. Additionally, we design a conditional diffusion model capable of efficiently simulating multiple track types within a single architecture by injecting a track-type condition. Both models achieve accuracy comparable to Geant4-based simulation. The process is accelerated by up to three orders of magnitude.

A benchmark dataset of single-track events simulated with Gean4 is released for the study and to support further research, covering the full experimental condition space.

Speaker: Tong Liu

BES3EMC-ICHEP.pdf

5:15 PM New Features of the Lorenzetti Showers Framework: an easy-to-use tool for general-purpose simulation of high-energy particle detectors

Lorenzetti Showers was developed in 2022 by integrating particle generation and detector interaction simulation, providing an easy-to-use interface. The aim was to allow the HEP community at large to simulate calorimeters for collider experiments, including a full electronic signal processing chain, and access to instrumental pulses, enabling studies of electronic circuits, signal processing, machine learning, and triggering.

Since then, several updates have been implemented, including integration with HEPMC and DD4hep, and features such as: capacitive and inductive crosstalk between adjacent calorimeter cells that degrade reconstruction of energy and time; distortions that simulate hardware malfunctioning; emulation of online calorimeter cells suppression for information reduction when readings are below specific thresholds; and a overlay strategy to accelerate simulations with high pileup.

Extensions beyond the original calorimeter design are under development, including integration of a tracking system and prototype detectors for FCC, providing a versatile tool for developing instrumentation and signal processing chains for future detectors. Lorenzetti Showers is also used to provide training data for generative neural networks for ultra-fast simulations that generate calorimeter-based reconstructed level features of particle showers. Such tools would become important for improving recasting frameworks that will preserve LHC's legacy results in the coming years.

Speaker: Prof. Eduardo Furtado De Simas Filho (Federal University of Bahia (BR))

ICHEP - Lorenzetti Showers_final.pdf

5:30 PM The experiment-independent Gaussino simulation software and its use in the LHCb experiment Gauss framework

As High Energy Physics experiments transition toward the High-Luminosity LHC era, the demand for flexible and high-performance simulation software has become increasingly critical. This talk presents the recent evolution of Gaussino—an experiment-independent simulation framework built upon the Gaudi software stack—and its deployment as the core of the new LHCb simulation infrastructure. We describe core architectural advancements in Gaussino, including a significant restructuring of components and interfaces that now facilitates the seamless integration of Matrix Element generators such as Powheg, MadGraph, and Pythia. We will also report on the progress of integrating and testing AdePT, a component designed to offload detector simulations to GPUs, addressing the industry-wide shift toward heterogeneous computing. Finally, we present the operational experience of migrating the LHCb experiment from its legacy Gauss software to the new "Gauss-on-Gaussino" architecture. This includes the deployment and commissioning of the framework within the LHCb distributed production system, the validation of physics reliability for the upcoming Sim11 campaign, and the steps taken to ensure functional parity with current production standards. This evolution not only reduces long-term maintenance costs but also paves the way for other HEP experiments to adopt Gaussino, fostering collaborative software development and sharing across the global HEP community.

Speaker: Menglin Xu (CERN)

Gaussino.pdf

5:45 PM Evolving ATLAS Full Simulation: Performance Gains, Code Modernization, and GPU Offloading for Run 4

Monte Carlo detector simulation plays a central role in high-energy physics, providing the foundation for precision measurements and searches for new phenomena. At the same time, it is extremely computationally demanding. For Run 3, the ATLAS experiment implemented a series of targeted optimizations and tunings to reduce CPU usage while preserving physics accuracy. Collectively, these improvements achieved a factor-of-two speedup compared to the Run-2 baseline. For Run 4, ATLAS is refactoring the simulation code to streamline the interface with Geant4 and make it more maintainable by removing unnecessary layers. In parallel, the collaboration is exploring a transformative direction for Full Simulation by offloading electromagnetic physics to GPUs and moving toward hybrid CPU–GPU execution models. This effort builds on the progress of the AdePT and Celeritas projects, which provide GPU-accelerated EM physics and navigation capabilities. Importantly, ATLAS is already capable of submitting hybrid GPU simulation jobs on the Grid, marking a key milestone toward operational deployment and production quality workflow. This contribution will present the current status of these developments, including CPU/GPU performance, physics accuracy, and practical deployment, and outline the short- and long-term enhancements that will guide the evolution of ATLAS Full Simulation toward Run 4 and beyond.

Speaker: Julien Esseiva (LBNL)

evolving_atlas_073126.pdf

4:45 PM → 6:00 PM Equity, Diversity and Inclusion

Convener: Clemencia Mora Herrera (CBPF - Brazilian Center for Physics Research (BR))

DiscussionSession.pdf

4:45 PM Diversity and inclusion efforts in the ALICE collaboration

The ALICE Collaboration at the LHC comprises about 1870 members from about 169 institutes in 38 countries from around the world. Established in 2019, the ALICE Diversity Office monitors issues related to diversity, promotes initiatives regarding diversity and inclusion within the ALICE Collaboration, and serves as a direct liaison with the diversity offices at CERN and the other experiments at the LHC. Cultural differences are a source of richness in a scientific collaboration but could also became a hindrance due to the different manners on which people perceive the interpersonal interactions. In the last few years, the ALICE collaboration started organizing workshops aimed at promoting wellbeing and inclusivity in the community with the hope of mitigating such conflicts. In addition, the ALICE Diversity Office collects yearly statistics used to investigate the time evolution of membership trends at ALICE across various categorical demographic and geographical variables, such as gender, career status, and region of affiliation. The data from most recent survey with the time evolution of these statistics will be shown together with some considerations on the results of the first season of workshops on wellbeing and inclusivity.

Speaker: Maria Paula Martins Palhares (Universidade de Sao Paulo (USP) (BR))

ALICE_Diversity_Inclusion_ICHEP_MP.pdf

5:00 PM The ATLAS Equity, Diversity & Inclusion Office

The ATLAS Collaboration comprises 5900 members, from over 100 different countries across the globe. The broad spectrum of cultural, social, economic, linguistic and educational backgrounds of these individuals is not only enriching to the community, but is critical to the success of the experiment's scientific research. To support this rich diversity, ATLAS recently implemented an Equity, Diversity & Inclusion (EDI) Office. Beyond acting as contacts to the collaboration, the office pro-actively identifies opportunities and proposes initiatives to improve conditions toward creating an equitable environment that allows everyone to contribute their own individual strengths. The goals and structure of the office will be presented, along with some of the most recent regional, age and gender demographics of the collaboration.

Speaker: Victoria Martin (The University of Edinburgh (GB))

ATLAS-EDI-Office-VictoriaMartin-ICHEP2026.pdf

5:15 PM Diversity, Equity, Inclusion, And Accessibility at CMS

We show the work toward diversity, equity, inclusion, and accessibility (DEIA) for all members of the CMS Collaboration. We focus on the statistics prepared by the Diversity and Inclusion (D&I) office to quantify the demographic membership of the Collaboration. We discuss limitations of the methodology, and also on the interpretation of the current statistical results. We also discuss our suggestions for improvements and some ideas toward HEP-wide standards of best DEIA practices.

Speaker: Mohammad Naimuddin Naimuddin (University of Delhi (IN))

DEI_ICHEP26.pdf

5:30 PM ICTPs Physics Without Frontiers: Diversifying Physics and Building the Next Generation

ICTP Physics Without Frontiers works to help build the next generation of scientists in the Global South by training and inspiring students in areas of exciting physics research and by providing mentoring and networking opportunities. It reconnects scientists with their home countries and contributes to a more diverse and globally connected physics community.

Speaker: Dr Kate Shaw (University of Sussex (GB))

PWF ICHEP 2026.pdf

4:45 PM → 6:30 PM Strong Interactions and Hadron Physics

Convener: Cesar Luiz Da Silva (Los Alamos National Laboratory (US))

4:45 PM Nuclear physics, gravitational waves and dark matter as tools to probe neutron stars

After all the available star chemical elements are used in nuclear fusion, three stellar remnants are possible: black holes, white dwarfs, neutron stars (NS), the latter being the object of my talk.  Their real constituents are unknown. We can assume that all constituents are hadronic or that NS are hybrid objects with a hadronic layer and a quark core. A third hypothesis is that NS can be purely quark stars. Hence, nuclear physics is present both during the star's life and in its NS aftermath.  
Since 2017, when the first gravitational wave resulting from an NS merger was detected, new constraints on the nuclear equations of state used to describe NS are accessible. The first data from the NICER telescope was available in 2021, with more contributions to clarify the scenario. With the probable confirmation of dark matter (DM), its influence on the properties of NS has been investigated.
Based on these detections, all three NS conjectures mentioned above (hadronic, hybrid, quark) are explored, and the possibilities that DM is either weakly or only gravitationally interacting with NS have been considered. In my talk, I plan to describe all scenarios and show what observational constraints can be satisfied.

Speaker: DEBORA MENEZES

ICHEP_DeboraMenezes.pdf

5:00 PM Surface tension of neutron star matter

The phase transition from hadronic to quark matter may take place already during the early post-bounce stage of core collapse supernovae and in neutron star mergers. If the phase transition is of first order, the formation of the quark matter phase occurs via the nucleation of droplets. The timescales relevant for the phase conversion dynamics, as well as the possibility of mixed phases, are very sensitive to the value of the surface tension in this dense environment. We discuss the computation of the surface tension from the initial purely chiral models to a nucleon-meson model that describes nuclear matter in the low-density sector, with fully broken chiral symmetry, and the approximately chirally restored phase at high density within a unified effective potential. Finally, we incorporate parity doubling, which allows for stable static configurations of stars with a metastable matter core, enabling stars with masses higher than the expected minimum mass of a neutron star formed via core collapse supernova and around the value of the less massive observed neutron star which makes metastability related phenomena particularly relevant. In all cases, we find values of the surface tension that favor the nucleation of quark matter.

Speaker: Eduardo Fraga (Instituto de Física, Universidade Federal do Rio de Janeiro)

ichep-fraga.pdf

5:30 PM QCD Wehrl and entanglement entropies in a gluon spectator model at small--$x$

Recent studies have shown that hadronic multiplicity in deep inelastic scattering can be associated with entanglement entropy. However, this definition is intrinsically longitudinal and does not capture the full phase-space structure of the proton, in particular the transverse position and momentum degrees of freedom of partons. In this work, we investigate the proton Wehrl entropy constructed from the gluon Husimi distribution, which provides a positive-definite phase-space description. We employ a gluon light-front spectator model based on soft-wall AdS/QCD-inspired wave functions, with free parameters constrained by global NNPDF fits, allowing us to compute both parton distribution functions and Wigner distributions. The Husimi distribution is obtained via Gaussian smearing of the Wigner distribution with width given by the saturation scale in the GBW model. We show that the entanglement entropy naturally emerges from the normalization of the Husimi distribution when computing the Wehrl entropy, while additional contributions arise from transverse phase-space degrees of freedom. Numerical results for the proton entanglement entropy are compared with CMS data, and the behaviour of the Wehrl entropy is presented for different values of the virtuality.

Speaker: Gabriel Rabelo-Soares (Universidade Estadual de Campinas)

ICHEP_ProtonEntropy.pdf

5:45 PM Extreme magnetic backgrounds in QCD matter

Peripheral heavy-ion collisions are expected to produce the largest magnetic field backgrounds on Earth. Even though these fields might quickly decay if in-medium magnetization effects are not enough to sustain their high intensities, the exploration of extreme magnetic field backgrounds in Strongly-interacting matter is highly demanded. In this talk, we discuss how quark anomalous magnetic moments and the equation of state might be modified. We compute the pressure, chiral condensate and strange quark number susceptibility from perturbative QCD up to two-loop order at finite temperature and very high magnetic fields with physical quark masses. We also discuss the case of cold and dense quark matter in the presence of a very strong magnetic field and constraints for quark magnetars​.

Speaker: Leticia Palhares

Palhares-ICHEP-2026.pdf

4:45 PM → 6:30 PM Beyond the Standard Model

Convener: Dr Louie Dartmoor Corpe (Laboratoire de Physique Clermont Auvergne (LPCA))

4:45 PM Searches for long-lived particles and unconventional signatures with CMS

Many models beyond the standard model predict new particles with long lifetimes. These long-lived particles (LLPs) decay significantly displaced from their initial production vertex thus giving rise to non-conventional signatures in the detector. Dedicated triggers and innovative usage of the CMS detector boost are exploited in this context to significantly boost the sensitivity of such searches at CMS. We present recent results of searches for long-lived particles and other unconventional signatures such as black holes, obtained using data recorded by the CMS experiment during the Run-II and Run-III of the LHC.

Speaker: Christina Wenlu Wang (Fermi National Accelerator Lab. (US))

ICHEP_LLP.pdf

5:00 PM ATLAS searches with unconventional signatures and analysis workflows

Various theories beyond the Standard Model predict new physics phenomena that require dedicated and unconventional reconstruction techniques and background estimation strategies. Examples include displaced decays from long-lived particles scenarios or Dark Matter models where the target particles fall below standard trigger thresholds. These signatures often challenge traditional search strategies and demand innovative approaches to detection and analysis. The talk will focus on the most recent results using 13 and 13.6 TeV pp collision data collected by the ATLAS detector.

Speaker: Cristiano Sebastiani (CERN)

ichep26_sebastiani.pdf

5:15 PM The ALADDIN experiment at LHC

ALADDIN (An LHC Apparatus for Direct Dipole moments INvestigation, https://aladdin.web.cern.ch/) is a proposed compact fixed-target experiment at the LHC, designed to enable precise measurements of charm baryon electromagnetic dipole moments. The experiment leverages an innovative storage-ring layout that redirects protons from the beam halo onto a solid target, coupled with a bent crystal. This setup produces forward-boosted charm baryons, which are then channeled through the crystal. By exploiting spin precession induced by the channelling effect in the bent crystal, ALADDIN aims to measure both the magnetic and electric dipole moments through an analysis of the polarization of decaying charm baryons. The experimental apparatus consists of a 4.4 m-long spectrometer and a 20 m-long RICH detector for particle identification. It is designed for installation in the LHC Insertion Region 3 during Long Shutdown 3 (and onwards), requiring no civil engineering and having minimal impact on LHC operations, with data-taking planned for Run 4+. A proof-of-principle test at the LHC, TWOCRYST, is currently underway to demonstrate the feasibility of the concept, with results expected in 2025/2026. The experiment’s Letter of Intent has been submitted to the LHCC (https://cds.cern.ch/record/2905467), which has approved the collaboration to proceed with a technical proposal in 2026.

Speaker: Giorgia Tonani (Università degli Studi e INFN Milano (IT))

Aladdin_Tonani.pdf

5:30 PM Mu2e: Probing the Frontiers of Physics Using Muons

The absence of any signature for new physics beyond the standard model at the Large Hadron Collider has left the field of elementary particle physics in a quandary. We know there is new physics out there: where best to look for it? Searches for certain rare processes provide ultra-sensitive probes for new physics and can reach mass scales unobtainable by any conceivable accelerator, present or imagined. We describe an experiment, Mu2e, to be mounted at Fermilab that intends to use a novel technique to search for new physics through charged lepton flavor violation in muons with sensitivities up to a factor of 10,000 over existing limits.

Speaker: Matthew Stortini (Yale University)

stortini_ichep_2026_mu2e.pdf

5:45 PM Search for n → n̄ Oscillations with the HiBEAM/NNBAR Program at ESS

The violation of baryon number is a key ingredient for explaining the observed matter-antimatter asymmetry of the Universe, yet no such process has been observed experimentally. The HIBEAM/NNBAR program at the European Spallation Source is conceived as a two-stage experimental program designed to open a new discovery window for baryon number violation using free neutrons. The first stage, HIBEAM, is based on a multi-purpose, magnetically controlled beamline enabling a broad physics program, including the first competitive search for free n → n̄ oscillations since the last dedicated experiment, with an expected order-of-magnitude improvement in sensitivity. Beyond the standard n → n̄ mixing scenario, HIBEAM is sensitive to a broader class of neutron conversion processes, providing laboratory tests of physics beyond the Standard Model, including possible connections to dark-sector portals. The second stage, NNBAR, is a dedicated experiment optimized for n → n̄ oscillation searches, exploiting a higher neutron flux and a longer free-flight region to achieve sensitivity gains of up to three orders of magnitude compared to previous experiments. This talk reviews the physics motivation, experimental concepts, current status, and the ongoing conceptual and technical planning toward first physics results.

Speaker: Tiago Quirino (Universidade do Estado do Rio de Janeiro (BR))

ICHEP_FINESSE_NNBAR_presentation.pdf

6:00 PM Reliable collider Mass Bounds for Highly Ionising Particles via Resummation

Magnetic Monopoles (MM) and high-electric-charge objects (HECOs) are highly ionising particles actively searched for at the LHC. Unfortunately, due to their large couplings, standard tree-level predictions, such as mass bounds, are unreliable.
Here we discuss a loop resummation following the analysis suggested by Dyson and Schwinger for obtaining analytical results in strongly coupled gauge theories. We present a one-loop Dyson-Schwinger-like resummation scheme that accommodates strong couplings and restores theoretical control in the cases of (structureless) MM and HECOs. The resummed effective theories are characterised by appropriate non-trivial ultraviolet (UV) fixed points, which define the theory to be used in experimental searches.
For spin-1/2 monopoles, we employ a U(1)$_{\rm em} \otimes$ U(1)$'$ effective field theory with a dual strongly-coupled dark photon. For spin-1/2 and spin-0 HECOs, we work within strongly coupled QED, where scalar HECOs require sufficiently strong self-interactions to stabilise the non-perturbative UV fixed point.
This scheme provides theoretically reliable production cross sections, enabling robust mass bounds for monopoles and significantly improved constraints for HECOs from ATLAS and MoEDAL searches compared to tree-level estimates. In the MM case, we have the freedom to define the effective magnetic charge so as to reproduce exactly the tree-level processes used in collider searches.

Speaker: Emanuela Musumeci (University of Alabama (US))

Musumeci_ICHEP26_Resummation.pdf

6:15 PM Axions from the flavour deconstruction of QCD

We study the axion solution to the strong CP problem in models where QCD is flavour deconstructed. The first layer of deconstruction $SU(3)_{12}\times SU(3)_3$ predicts two physical axions, one always behaves as the the usual QCD axion while the other can be found above or below the traditional QCD line. An invisible, exotic axion above the QCD line appears when the deconstruction occurs near the TeV scale and the associated heavy gauge boson (coloron) is mostly coupled to light quarks, making this scenario testable at current and future high energy colliders. Otherwise, a visible axion below the QCD line appears, which is better tested through cosmological signals. If QCD is completely deconstructed $SU(3)_{1}\times SU(3)_2\times SU(3)_3$, then a third physical axion is predicted below the QCD line. We study axion dark matter in this framework and provide simple but ultraviolet complete models that connect the Peccei-Quinn scale with the scale of vector-like quarks participating in the origin of CKM quark mixing.

Speaker: Marta Fuentes Zamoro

flavour_deconstruction_ICHEP.pdf

4:45 PM → 6:30 PM Operation, Performance and Upgrade of Present Detectors

Convener: Marco Bregant (Universidade de Sao Paulo (USP) (BR))

4:45 PM The LHCb RICH Upgrade: Operations and Performance

The LHCb experiment is dedicated to precision measurements of CP violation and rare decays of beauty and charm hadrons. A key element is the Ring Imaging Cherenkov (RICH) system, providing robust charged-hadron identification over a wide momentum range.
During the second Long Shutdown of the LHC, the LHCb detector underwent a major upgrade to allow operation at a five-fold increased instantaneous luminosity and to enable a fully software-based trigger operating at the LHC bunch-crossing rate of 40 MHz.
To maintain excellent particle identification performance between approximately 3 and 100 GeV/c, the RICH detectors were completely refurbished. The upgrade includes the replacement of the Hybrid Photon Detectors with new multi-anode photomultiplier tubes, the development of custom readout electronics and a re-optimization of the optical layout to preserve performance while reducing the material budget.
This contribution presents the design and implementation of the upgraded RICH detectors. The calibration procedures are described, together with the figures of merit used to assess detector performance. The particle identification efficiency and stability achieved under such high-occupancy conditions are shown, demonstrating that the upgraded RICH system fully meets the requirements of the LHCb Upgrade I physics program.

Speakers: Federica Oliva (The University of Edinburgh (GB)), on behalf of the LHCb RICH collaboration

ICHEP2026_LHCbRICH_FeOliva.pdf

5:00 PM New techniques for reconstructing and calibrating hadronic objects with ATLAS

The precision and reach of physics analyses at the LHC is often tied to the performance of hadronic object reconstruction & calibration, with any incremental gains in understanding & reduced uncertainties being impactful on ATLAS results. Recent refinements to the reconstruction and calibration procedures for jets & missing energy by the ATLAS collaboration has resulted in reduced uncertainties, improved pileup stability and overall performance gains. In this contribution, highlights of these developments will be presented.

Speakers: Federico WINKEL (Buenos Aires), Federico Winkel (Universidad de Buenos Aires (AR))

ICHEP2026_JET_CALIB_RECO_PERF_FWinkel-2.pdf

5:15 PM Latest results from muon object performance with the ATLAS experiment at the LHC using Run-3 data

The reconstruction and precise measurement of muons are essential for a wide range of physics analyses within the ATLAS experiment at the Large Hadron Collider (LHC). During Run-3, the ATLAS Muon Spectrometer underwent major upgrades, most notably the installation of the New Small Wheel system, designed to improve tracking and triggering performance in the forward region. Assessing the performance of these new detectors with proton–proton collision data at a center-of-mass energy of 13.6 TeV is therefore a crucial step for ensuring the accuracy and reliability of physics results. Using well-known di-muon resonances, we provide a detailed evaluation of muon reconstruction, identification, and isolation efficiencies, as well as momentum scale and resolution. State-of-the-art techniques developed for Run-3 allow us to characterize the detector response with unprecedented precision. This contribution presents the latest results on muon performance, highlighting the impact of the recent upgrades on ATLAS physics capabilities.

Speaker: Luca Martinelli (INFN Sezione di Roma (IT))

Martinelli_ICHEP_310726.pdf

5:30 PM Precision luminosity measurement in proton-proton and heavy-ion collisions with the CMS detector

The measurement of the integrated luminosity recorded by the CMS detector at the LHC in proton-proton collisions during Run 2 and Run 3 is reported. The absolute luminosity calibration is obtained with the van der Meer (vdM) method through beam separation scans that were performed in special accelerator conditions. Multiple independently-calibrated luminosity detectors (luminometers) are employed to derive the final integrated luminosity. In Run 2, a relative precision of 0.82 and 0.84% is achieved for the 2017 and 2018 data sets, respectively. When combined with the 2015–2016 data sets at the same center-of-mass energy, the relative precision of the total integrated luminosity is 0.73%, representing the most precise luminosity measurement ever achieved at bunched-beam hadron colliders. The dominant uncertainties are the luminometer nonlinearity and the assumption of transverse factorizability in the vdM method. The consistency of the measurements is evaluated using Z boson production rates. For Run 3, the luminosity detectors have been upgraded. Preliminary results have been obtained for the integrated luminosity in the 2022-2024 data-taking periods with a precision ranging between 1.3% and 1.6%. We expect final results will be available in time for this conference. Results for Heavy Ion collisions will also be presented.

Speaker: Peter Major (University of Maryland (US))

ICHEP 2026 - public - Precision luminosity measurement in proton-proton and heavy-ion collisions with the CMS detector.pdf

5:45 PM Luminosity Determination at LHCb in Run 3

During data-taking, LHCb optimizes physics performance by levelling the instantaneous luminosity within each fill, steering the transverse beam separation. In Run 3, the experiment transitioned to a fully software-based trigger and routine operation at an instantaneous luminosity about five times larger than in previous runs, requiring upgraded strategies for real-time monitoring and offline absolute calibration.This contribution reviews the Run-3 luminosity framework, centred on the dedicated PLUME luminometer and complemented by a set of online proxies from nearly all sub-detectors, providing both integrated and bunch-by-bunch luminosity for operations. PLUME has demonstrated robust performance (DAQ efficiency above 99% during 2024 data taking) and serves as a reference for cross-calibrating backup systems and sub-detector-based proxies. In parallel, dedicated luminosity trigger lines record offline-quality observables in a specialised 30 kHz stream, enabling precise offline calibration and systematic cross-checks of linearity and long-term stability. We also summarise key Run-2 absolute calibration developments based on van der Meer scans. Recent studies using beam-gas imaging to calibrate DOROS beam-position monitors provide beam-displacement measurements at IP8 with sub-micron precision, improving control of length-scale and orbit-drift systematics relevant to reference cross-section determinations. Finally, we present updated Run-3 results, including the latest beam-gas-imaging measurement of the ghost-charge fraction.

Speaker: Giulio Cordova (SNS & INFN Pisa (IT))

ICHEP_Lumi_LHCb.pdf

6:00 PM LUCID, the ATLAS luminosity detector in LHC Run-3 and its upgrade for HL-LHC

The LUCID-2 detector is the main luminometer of the ATLAS experiment and the only one able to provide a reliable luminosity determination in all beam configurations, luminosity ranges and at bunch-crossing level. LUCID-2 is now providing ATLAS with the luminosity measurement also in LHC Run-3. Preliminary results on the acquired datasets will be presented, suggesting that precision similar to Run 2 (0.8%) can be obtained.
The ATLAS physics program at High Luminosity LHC (HL-LHC) calls for a precision in the luminosity measurement of 1%. To fulfil such requirement in an environment characterized by up to 140 simultaneous interactions per crossing (200 in the ultimate scenario), ATLAS will feature several luminosity detectors. At least some of them must be both calibratable in the van der Meer scans at low luminosity and able to measure up to its highest values. LUCID-3, the upgrade of LUCID will fulfil such a condition. In this contribution, several options LUCID-3 are presented, as well as the prototypes installed in Run 3: photomultipliers (PMT), as for LUCID-2, located farther from the beam-pipe or in shielded areas, optical fibers acting as Cherenkov radiators and read-out by PMTs, high-temperature LGAD detectors.

Speaker: Dr Federico Lasagni Manghi (Universita e INFN, Bologna (IT))

ICHEP_LUCID.pdf

4:45 PM → 6:30 PM Quark and Lepton Flavor Physics

Conveners: Dmytro Kovalskyi (Massachusetts Inst. of Technology (US)), Melissa Maria Cruz Torres (CBPF - Brazilian Center for Physics Research (BR))

4:45 PM Analyses of $B \to K^{(*)} \mu^+ \mu^-$ decays at LHCb

Flavour changing neutral current processes, such as the $b \to s \ell^+\ell^-$ transition, are forbidden at the lowest perturbative order in the Standard Model (SM) and are therefore highly sensitive probes for potential New Physics. The $B \to K^{(*)}\mu^+\mu^-$ family of decays are among the most well studied of these, with measurements of branching fractions and angular observables showing persistent tensions with the SM. Recent LHCb results will be presented covering a wide range of observables in $B \to K^{(*)}\mu^+\mu^-$ decays and exploring important questions regarding the current tensions with respect to the SM.

Speaker: Ulrik Egede (Monash University (AU))

Egede-ICHEP31Jul2026.pdf

5:00 PM Studies of $b \to d \ell^+ \ell^-$ decays at LHCb

Quark transitions from the third to the first generation can occur through the flavour changing neutral current $b \to d \ell^+ \ell^-$ processes. With respect to the well-studied $b \to s \ell^+ \ell^-$ transitions, they are further suppressed by the small CKM matrix element involved, making them particularly sensitive probes for New Physics beyond the Standard Model. In this talk, recent LHCb results with $B^+ \to \pi^+ \mu^+ \mu^-$ and $B^+ \to \pi^+ e^+ e^-$ decays will presented.

Speaker: Felipe Luan Souza De Almeida (University of Barcelona (ES))

ICHEP_btodll_260731_v1.pdf

5:15 PM Radiative $b$-hadron decays with the LHCb experiment

Radiative b-hadron decays proceed via the flavour-changing neutral-current transitions b→sγ and b→dγ, which are forbidden at tree level in the SM and occur only through loop diagrams. As a result, they provide powerful probes of physics beyond the Standard Model. Radiative decays offer a large set of observables, including measurements of branching fractions, charge-parity violation, angular distributions and photon polarization, sensitive to different beyond the Standard Model scenarios. The form factors are challenging to calculate, with different predictions resulting from different methods. Experimental measurements shed light to the validity of the theory approaches. To study the radiative decays, LHCb uses two complementary photon reconstruction techniques: by their energy measurement in the electromagnetic calorimeter, and by their conversion into electron pairs, allowing momentum to be reconstructed with the tracking detectors. The LHCb experiment has performed a wide range of measurements setting stringent constraints on New Physics scenarios, including new and more precise measurements on b→dγ transitions.

Speaker: Irene Bachiller (EPFL - Ecole Polytechnique Federale Lausanne (CH))

ICHEP_IreneBachiller_Radiatives.pdf

5:30 PM Rare heavy flavour decays overview in CMS

This is an overview talk describing all the rare decays analysis in heavy flavour with the CMS detector. The described analysis are utilizing the new and improved parking strategy of the CMS experiment which has collected an unprecedented number of events making searches for very rare processes feasible.

Speaker: Georgios Melachroinos (National and Kapodistrian University of Athens (GR))

ICHEP_2026_RareDecaysOverview_Melachroinos.pdf

5:45 PM Phase-space anisotropy signatures as a probe of New Physics in b→sμ+μ− decays

Rare semileptonic b→sμ+μ− transitions are among the most interesting channels in indirect searches for New Physics (NP) effects. Recent studies of these processes indicate a suppression in decay rates and deviations in phase-space distributions of decay products with respect to Standard Model (SM) predictions. Since the confirmation of these anomalies are currently limited by large theoretical uncertainties, complementary experimental avenues are essential to probe these phenomena. An interesting possible feature in the case of NP is the introduction of new weak phase(s) beyond the SM one, which in turn can interfere with SM processes and manifest as distinct asymmetries in the phase space of the decay. Multibody decays have enhanced sensitivity to the phenomenon when several different intermediate quantum amplitudes can interfere, resulting in distinctive patterns of excess or deficit in regions of the phase space. In this work, we propose a novel set of observables that are sensitive to local asymmetry signatures in the phase space of non-exclusive multibody rare semileptonic decays, and are not hindered by the sizable SM uncertainties. In this talk I will discuss the possible magnitude of these effects and the perspectives to observe this phenomenon at collider experiments.

Speaker: Rafael Silva Coutinho (CBPF - Brazilian Center for Physics Research (BR))

Talk_RSilvaCoutinho.pdf

6:00 PM LFU tests in b->sll decays and search for b->s$\tau\tau$

Processes mediated by the quark-level transition $b \to s \ell^+\ell^-$ are highly suppressed in the SM, as they occur only through higher-order electroweak loop diagrams. This suppression makes FCNC processes particularly sensitive to contributions from physics beyond the SM. They therefore provide an excellent laboratory to test Lepton Flavour Universality (LFU), a fundamental property of the SM according to which electroweak gauge bosons couple identically to the three lepton generations. Any observed deviation from LFU would constitute a clear signal of New Physics. In this contribution, measurements of the relative rates of $H_b \to H_s \ell^+\ell^-$ decays performed by LHCb, in different intervals of the dilepton invariant mass squared, are presented for a wide range of strange hadronic final state. Beyond tests involving light leptons, decays mediated by the transition $b->s\tau\tau$ provide complementary probes for new physics scenarios, since the $\tau$ lepton couples more strongly to potential NP effects in many extensions of the SM. Although experimentally challenging due to the presence of multiple neutrinos in the final state, searches for $b->s\tau\tau$ transitions offer a crucial opportunity to to further explore the flavour structure of physics beyond the SM. In this contribution, the LHCb analysis of $b->s\tau\tau$ transitions are presented.

Speaker: Lisa Fantini (INFN, Perugia (IT))

LFU_Fantini_v1.pdf

6:15 PM Vector-like quark doublets, weak-basis invariants and CP violation

Although a fourth chiral generation of fermions is experimentally ruled out, the possibility of extending the SM with vector-like quarks (VLQs), where both chiral components transform the same way under SU(2)_L cannot be excluded. In particular, extensions of the SM involving isodoublet VLQs with standard charges currently stand as the favoured candidate in explaining the Cabibbo Angle Anomalies. This stems from the fact that they allow for both left-handed and right-handed charged currents. This feature of isodoublet VLQ models not only gives rise to a very rich phenomenology, but may also induce important new sources of CP violation. In turn, these sources are directly connected to the existence of additional CP-odd weak basis invariants (WBIs), distinct from the single one present in the SM or those present in other VLQ models. In this talk we present these new WBI quantities and show how they may signal the presence of CP violation at extremely high energies. Moreover, we relate the structure and mass dimension of these WBIs to various types of effective rephasing invariant quantities arising from the interplay of LH and RH charged currents, thus inducing imprints on a variety of flavor observables that are unique to VLQ isodoublet extensions.

Speaker: José Filipe Bastos (CFTP, Instituto Superior Técnico, Universidade de Lisboa)

ICHEP2026 (2).pdf

4:45 PM → 6:30 PM Astroparticle Physics and Cosmology

Convener: Carlos José Todero Peixoto (Universidade de São Paulo)

4:45 PM Cosmic muon spectrum at Madurai, India and tuning of model paramters in CORSIKA

A prototype detector, called mini-ICAL made of 11 layers of iron
plates (measuring $4\,m \times 4\,m \times 0.056\,m$ ) with 45\,mm gaps between each layer
was built and operated Madurai, India$\:$(9$^\circ$\,56'\,N, 78$^\circ$\,00'\,E)
to establish the detector performance and to test INO-ICAL electronics in the presence of a
magnetic field. Resistive plate
chambers ($2\,m\times 2\,m$) with 30\,mm strip width are placed between each iron layer to track cosmic
ray muons. The iron is magnetised to a maximum field of 1.5\,T by applying a current
of 900\,A through 32 copper coils. Though the position resolution of RPC detector is much worse
than the conventional trackers in the high energy physics experiments, muon momentum is reasonably
measured within $\sim$ 1\,GeV/c to 5\,GeV/c. Using the folding technique, reconstructed
momentum spectrum is converted to the cosmic muon spectra for the whole momentum range of
$\mu^+$ and $\mu^-$.
In parallel to measure the momentum spectrum, the differential distribution with respect to
the zenith and azimuthal angles are also obtained. The obtained muon spectrums are
compared with the CORSIKA simulated muon with different hadronic models. This paper will
describe the comparison of data and CORSIKA results with different tuning parameters of those models.

Speaker: Gobinda Majumder (Tata Institute of Fundamental Research (IN))

ichep20266_muon_flux_tifr.pdf

5:00 PM Probing Hadron Production Beyond Collider Energies with Extensive Air Showers

Ultra-high-energy cosmic rays have long been recognized as a unique opportunity to access hadronic interactions at centre-of-mass energies and forward kinematics far beyond those achievable at collider experiments. In this talk, we present a framework that establishes, for the first time, a direct and physically interpretable link between hadron production in the primary interaction and correlated fluctuations of air-shower observables.

By introducing a compact set of production variables constructed from the energy spectra of secondary particles in the first interaction, we show that a linear combination of these variables, $\xi$, captures the dominant fluctuations of the depth of shower maximum, $\Delta X_{\rm max}$. The causal connection between $\xi$ and $\Delta X_{\rm max}$ enables the construction of a probabilistic mapping that predicts the moments of the $X_{\rm max}$ distribution in a model-independent way, with biases well below current experimental uncertainties.

Building on this approach, we further show that the depth of shower maximum and the muon content of extensive air showers jointly encode how the primary energy is distributed among secondary particles. These features can be accessed through a probabilistic description that isolates sensitivity to hadronic physics in the initial collision, while treating the subsequent shower development as effectively universal.

Speaker: Ruben Conceição (Laboratory of Instrumentation and Experimental Particle Physics (PT))

Conceicao_ICHEP26.pdf

5:15 PM Sensitivity of Shower Footprint Variables to High- and Low-Energy Hadronic Interaction Models

Discriminating gamma-ray–induced air showers from the overwhelming hadronic background remains a main challenge in ground-based gamma-ray astronomy. While traditional separation methods rely on muon counting—requiring complex, costly dedicated detector systems—recent studies demonstrate that ground-level observables provide competitive, cost-effective alternatives. Moreover, the variables Pαtail​, quantifying signal outliers, and LCm​, characterizing azimuthal asymmetries in the shower footprint, have emerged as promising gamma–hadron discrimination parameters.
In this work, we investigate the robustness of these observables against hadronic interaction modeling, a key source of systematic uncertainty in air-shower simulations. We performed CORSIKA simulations of proton-induced air showers for water-Cherenkov detector arrays, initially focusing on vertical showers at 100 TeV and subsequently extending the analysis to a broader energy range and multiple combinations of high- and low-energy interaction models.
A systematic analysis was conducted to test the variables' resilience to different models, or, alternatively, identify significant deviations. Both Pαtail​ and LCm​ exhibit strong correlations with muonic content across the explored energies, though low-energy model variations reveal significant differences. This contribution also includes studies of inclined showers and various primary particles to assess the general applicability of these observables and their potential to constrain hadronic interaction models using data from next-generation gamma-ray observatories such as SWGO.

Speaker: Maria Inês Beja da Costa Soromenho de Alvito

ICHEP - Inês Alvito.pdf

5:30 PM From Colliders to Cosmic Rays: Testing Hadronic Interaction Models

While terrestrial accelerators provide essential particle physics data, the highest energies are accessible only through ultra-high-energy cosmic rays (UHECRs), whose atmospheric interactions produce extensive air showers that probe center-of-mass energies far beyond those of the LHC. The Pierre Auger Observatory acts as a massive natural laboratory, using a hybrid detection framework to simultaneously record the longitudinal development and the lateral distribution of air showers.
This contribution compares recent experimental results with state-of-the-art hadronic interaction models, focusing on the challenges of extrapolating collider-scale data to the ultra-high-energy regime. We discuss the sensitivity of observables to multiparticle production properties—such as secondary particle multiplicity, elasticity, and pion charge exchange shaping the electromagnetic-to-hadronic energy ratio—at energies and forward kinematics inaccessible to colliders. These findings provide critical insights where the Standard Model and hadronic generators face significant challenges. Ultimately, this work highlights the role of the Pierre Auger Observatory in constraining the properties of multiparticle production and hadronic cross-sections at the highest energies known to exist.

Speaker: Analisa Gabriela Mariazzi

Mariazzi _ICHEP2026.pdf

5:45 PM Testing high-energy hadronic interaction models through the muon charge ratio in extensive air showers

The muon charge ratio, $R_{\mu} = N_{\mu^{+}}/N_{\mu^{-}}$, is an observable sensitive to both the composition of primary cosmic rays and the properties of hadronic interactions in extensive air showers (EAS). It also serves as a crucial input for atmospheric neutrino flux predictions. In this work, we present a systematic study of $R_{\mu}$ using Monte Carlo simulations of EAS initiated by primary protons and helium nuclei in the energy range from $100$ GeV to $10^6$ GeV, performed with the CORSIKA framework. We evaluate six high-energy hadronic interaction models — QGSJETII-04, EPOS-LHC, DPMJET III, SIBYLL 2.3c, VENUS, and QGSJET01-C — comparing their predictions for the energy dependence of $R_{\mu}$. Our analysis focuses on the expected rise in $R_{\mu}$ with $E_{\mu}\cos\theta^{*}$, associated with the increasing contribution of kaon production at higher energies. While most models reproduce this trend, comparisons with experimental data from multiple measurements reveal that the predicted increase is not observed, indicating systematic discrepancies in the treatment of kaon production across current hadronic interaction models. These results highlight the need for improved descriptions of high-energy hadronic processes in EAS simulations, with direct implications for atmospheric neutrino flux calculations.

Speaker: Ademar Paulo Junior (Instituto Federal de Educação, Ciência e Tecnologia do Tocantins)

apresentação_ademar_paulo_junior.pdf

6:00 PM Multi-messenger Emission from Radio Galaxies: Models and Constraints

Unlike blazars, radio galaxies host relativistic jets that are misaligned with respect to our line of sight, providing a complementary view of jet physics and the environment of the central supermassive black hole. Their TeV observations reveal ultra‑fast variability and relatively hard γ‑ray spectra, and their broadband spectral energy distributions show the characteristic double‑peaked structure commonly explained by synchrotron self‑Compton (SSC) emission. Motivated by indications that very‑high‑energy γ‑rays may have a hadronic origin, we model nearby radio galaxies within a lepto‑hadronic framework, in which the emission from radio to sub‑GeV energies is produced by SSC radiation, while TeV γ‑rays arise from neutral‑pion decay following both proton–photon and proton–proton interactions near the core. These hadronic processes are initiated by Fermi‑accelerated protons interacting with local photon and matter fields. We further assess the capability of the next‑generation Cherenkov Telescope Array Observatory (CTAO) to probe the γ‑ray emission predicted by these models for nearby radio galaxies.

Speaker: Prof. Rita de Cassia Dos Anjos

ICHEP2026_RadioGalaxies.pdf

4:45 PM → 5:45 PM Detectors for Future Facilities, R&D and Novel Techniques (including Quantum Sensors)

Conveners: Ulisses De Freitas Carneiro Da Graca (CBPF - Brazilian Center for Physics Research (BR)), Ginger Cheng (Nikhef National institute for subatomic physics (NL))

4:45 PM Spin Physics Detector project at NICA collider

The Spin Physics Detector (SPD) is a universal detector in the one of two interaction points of the NICA collider under comissioning at JINR, Dubna. SPD plans to study the spin structure of the proton and deuteron and other spin-related phenomena using a unique possibility to operate with polarized proton and deuteron beams at a collision energy up to 27 GeV and a luminosity up to $10^{32}$ cm$^{-2}$ s$^{-1}$. As the main goal, the experiment aims to provide access to the gluon TMD PDFs in the proton and deuteron, as well as the gluon transversity distribution and tensor PDFs in the deuteron, via the measurements of specific single and double spin asymmetries using different complementary probes such as charmonia, open charm, and prompt photon production processes. Other polarized and unpolarized physics is possible, especially at the first stage of NICA operation with reduced luminosity and collision energy of the proton and ion beams. Construction of the first stage of the SPD facility is included in the JINR seven-year development plan for 2024-2030. The physics program of the SPD project and the design of the SPD setup will presented.

Speaker: Dr Alexey Guskov (Joint Institute for Nuclear Research (RU))

SPD_ICHEP2026_Guskov.pdf

5:15 PM Development and Performance Studies of the HiDRa Dual-Readout Calorimeter

The European Strategy for Particle Physics identified an electron-positron Higgs factory as the highest priority next flagship project. Precision measurements at these accelerators require calorimeters with excellent hadronic energy resolution ($\sim \frac{30\%}{\sqrt{E}}$) to successfully separate Z, W, and Higgs decays.
The dual-readout technique, which simultaneously measures scintillating and Cherenkov signals, improves energy resolution by compensating the effect of electromagnetic fraction fluctuations in hadron showers.
The highly granular Dual-Readout demonstrator (HiDRa), developed by different INFN units and Universities, combines dual-readout technique and high granularity information. It is based on capillary stainless steel tubes, with layers alternatively filled with two types of fibres, one detecting scintillation light and the other Cherenkov light. Its size allows the containment of hadronic showers.
In parallel, detailed GEANT4 simulations of the detector have been developed to model its expected behaviour and performance under various conditions.
The prototype underwent different testbeam campaigns. A dedicated data-analysis effort is ongoing to evaluate the detector performance and compare it with the requirements of future accelerators.
In this contribution, results from test-beam data and simulations are presented and compared in order to validate the accuracy of the models and assess their capability to reproduce the measured detector performance.

Speaker: Luca Davide Tacchini (Pavia University and INFN (IT))

Tacchini_ICHEP_2026.pdf

5:30 PM Towards a Long Strip AC-LGAD Detector for the CEPC Outer Silicon Tracker

The Circular Electron–Positron Collider (CEPC) is designed to reach a center-of-mass energy of up to 360 GeV for electron–positron collisions, with primary goals of precision studies of the Higgs boson and searches for physics beyond the Standard Model. The CEPC outer silicon tracker will feature a total active area of ~85 m² and will integrate advanced long microstrip AC-Coupled Low-Gain Avalanche Diode (AC-LGAD) sensors with a spatial resolution of about 10 μm, enabling per-mille-level momentum resolution for charged-particle tracking below 100 GeV/c. In addition, this detector will serve as a high-precision time-of-flight system for particle identification, targeting a single-layer timing resolution of 50 ps. Following the release of the Reference Technical Design Report (Ref-TDR), the project has entered a new R&D phase, during which high-performance sensors, readout ASICs, front-end electronics, mechanical structures, and CO₂ cooling systems are being actively developed. This report provides a comprehensive overview of the detector concept, the current status of system development, and future plans. In particular, we highlight the latest developments of the microstrip AC-LGAD sensor and its dedicated readout ASIC, LATRIC.

Speaker: Mei Zhao (Chinese Academy of Sciences (CN))

Towards a Long Strip AC-LGAD Detector for the CEPC Outer Silicon Tracker-MeiZHAO-0731.pdf

4:45 PM → 6:30 PM (free room)

5:45 PM → 6:30 PM Accelerator: Physics, Performance, and R&D for Future Facilities

Convener: Gustavo Gil Da Silveira (UE Rio de Janeiro & UF Rio Grande do Sul (BR))

5:45 PM LHuC: A high energy, high luminosity muon-hadron collider at CERN

The latest developments concerning the possibility of making muon-hadron collisions by reusing the ERL infrastructure, proposed for the LHeC, will be presented. At the LH$\mu$C, a 500 GeV $\mu^+$ beam will be colliding with a 7 TeV proton beam, resulting in the centre-of-mass energy $\sqrt{s}=3.74$ TeV (higher than at the FCC-eh), with the expected luminosity above $10^{33}$cm$^{-2}$s$^{-1}$.

First half of the talk will be dedicated to the discussion of the LH$\mu$C concept – from the ultra-cold $\mu^+$ source, through the muon booster, to the main muon ring. Initial considerations regarding the machine-detector interface and the general-purpose detector will be also presented. In the second half, an overview of the LH$\mu$C scientific programme will be given, with highlights from QCD, through the Higgs-Electroweak-Top (HET) sector, to the beyond Standard Model case. The talk will conclude with a short discussion of unique and powerful synergies between the LH$\mu$C, LHeC, Muon Collider and FCC projects.

Speakers: Help4CERN, Laurent Forthomme (AGH University of Krakow (PL))

lhuc_forthomme_ichep2026.pdf

6:00 PM Progress towards a GammaFactory proof of principle experiment at CERN SPS

As part of the Physics Beyond Collider study group, the CERN Gamma Factory is an innovative proposal to exploit the potential of CERN to accelerate at ultra-relativistic energies partially stripped ion with high intensity such that their low lying atomic levels be excited by state of art optical systems. This may enable a very broad range of new applications from atomic physics to particle physics, including their applicative counterparts thanks to the production of high-energy photon beams (up to 400 MeV) with unprecedented intensity (up to $10^{18}$ photons per second). Recent experimental progress has been made towards the proof of concept before a future implementation in the CERN SPS. Stable average laser power as high as 700kW has been demonstrated in an Fabry-Perot cavity. Mechanical design of the system has been improved to great detail to allow operation of the system in presence of known vibration and thermal load in the optical cavity. Plans for future developments are exposed.

Speaker: Alice RENAUX

RENAUX_ICHEP2026.pdf

RENAUX_ICHEP2026.pptx

6:15 PM A Linear Collider Vision for the Future of Particle Physics

As contribution to the recent update of the European Strategy for Particle Physics, the Linear Collider Vision team reviewed linear e+e− colliders with a special focus on high center-of-mass energies and beam polarization, took a fresh look at the various accelerator technologies available or under development and, for the first time, discussed how a facility first equipped with a technology mature today could be upgraded with technologies of tomorrow to reach much higher energies and/or luminosities. Alternative collider modes as well as beyond-collider experiments and R&D facilities have been identified as additional opportunities at a linear collider facility.
This talk summarizes the Linear Collider Vision approach, and presents the status of work towards a linear collider as alternative project for CERN, for the case that the construction of FCC-ee turns out not to be feasible.
It heavily builds on decades of achievements of the global linear collider community, in particular in the context of ILC, CLIC and C3, and recent highlights of the projects will also be presented.

Speaker: Carsten Hensel (CBPF - Brazilian Center for Physics Research (BR))

556_LCVision_LCF.pdf

7:00 PM → 9:00 PM Poster session: #1

ICHEP 2026 - Natal, Brazil - Instructions for Poster Presenters.pdf

7:00 PM The formalism of open quantum systems for superfluid helium response to neutrino atom scattering

Low-energy neutrino interaction with superfluid He-4 can take place in the form of coherent elastic neutrino-atom scattering (CEvAS)[1]-a process that has not been observed so far. The first experimental study of CEvAS is under preparation in the National Center for Physics and Mathematics in Sarov [2].For example,one of the observable effects of beyond-Standard-Model physics in CEvAS can be neutrino millicharge and magnetic moment [3].In this study, we have applied the formalism of open quantum systems [4] to describe the evolution of the recoil helium atom after neutrino scattering on superfluid helium.In particular, we have obtained the Lindblad equation for a helium atom with an initial recoil energy of higher than 2 meV — the energy enough to knock the atom out from the condensate.[1] M. Cadeddu, et al., Potentialities of a low-energy detector based on 4He evaporation to observe atomic effects in coherent neutrino scattering and physics perspectives, Phys.Rev.D 100 (2019) no.7, 073014.[2] А.А. Yukhimchuk, et al., Physics of hydrogen isotopes, FIZMAT 1 (2023) 5. [3] G. Donchenko, et al, Elastic neutrino-atom scattering as a probe of neutrino millicharge and magnetic moment, JETP Lett. 117 (2023) 879.[4]H.-P. Breuer, F. Petruccione, The Theory of Open Quantum Systems, Oxford University Press, 2002.

Speaker: Alexey Lichkunov (Lomonosov Moscow State University)

7:02 PM Probing conversion-driven freeze-out at the LHC

Conversion-driven freeze-out is an appealing mechanism to explain the observed relic density while naturally accommodating the null-results from direct and indirect detection due to a very weak dark matter coupling. Interestingly, the scenario predicts long-lived particles decaying into dark matter with lifetimes favorably coinciding with the range that can be resolved at the LHC. However, the small mass splitting between the long-lived particle and dark matter renders the visible decay products soft, challenging current search strategies. We consider four different classes of searches covering the entire range of lifetimes: heavy stable charge particles, disappearing tracks, displaced vertices, and missing energy searches. We discuss the applicability of these searches to conversion-driven freeze-out and derive current constraints highlighting their complementarity. For the displaced vertices search, we demonstrate how a slight modification of the current analysis significantly improves its sensitivity to the scenario.

Speaker: Lucas Magno Dantas Ramos (Universidade de São Paulo)

poster_lmdr_ichep2026.pdf

7:03 PM Spin-Independent and Spin-Dependent Dark Matter Scattering in a Many-Body Superfluid $^3$He Target

We present a calculation from first-principles of the dark matter scattering rates in a superfluid $^3$He target, for both spin-independent and spin-dependent dark matter interactions. This study develops a complementary approach to studying the dark matter signal, accounting for the many-body physics of the target using the dynamic structure function. We find this both validates previous determinations of the QUEST-DMC experiment’s current reach, and provides the methods required to produce accurate signals for near-future experiments. Accounting for the many-body physics of $^3$He and its quantum statistics changes the kinematics of the scattering. The correction to the signal projects an improved reach to dark matter in the MeV mass region for future, lower-temperature, experiments.

Speaker: Adam Ting (Royal Holloway, University of London)

ICHEP2026Poster.pdf

7:04 PM Indirect Detection of Dark Matter with the Cherenkov Telescope Array Observatory (CTAO)

Dark matter (DM) remains one of the most intriguing problems in modern physics, accounting for approximately 25% of the total matter-energy content of the Universe. Its existence is supported by a wide range of astrophysical and cosmological observations, yet its fundamental nature remains unknown. Among the proposed candidates, Weakly Interacting Massive Particles (WIMPs) stand out as particularly well-motivated. One of the main strategies to search for WIMPs is indirect detection (ID), which focuses on identifying Standard Model particles produced by DM annihilation or decay.

The Cherenkov Telescope Array Observatory (CTAO), will play a key role in this effort. In the context of DM searches, CTAO will focus on detecting gamma rays from regions with high DM density, such as the Galactic Center. Thanks to its unprecedented sensitivity and its ability to probe energies up to the TeV scale, CTAO will significantly improve current constraints on DM models. This observatory will enhance the interpretation of gamma-ray signals and increase the prospects for identifying a statistically significant DM signature, providing valuable insights into new physics beyond the TeV scale.

Speaker: Andres Olmos Gonzalez (Universidade Federal do Rio Grande do Norte)

PosterEPNN-1.pdf

7:12 PM Searching for MIMPs with the COSINE-100 experiment

Multiply-Interacting Massive Particles (MIMPs ) are ultraheavy dark matter particles with mass in the $10^{10} - 10^{20}$ GeV range, which interact strongly with baryonic matter but may have evaded detection due to the low density required to form the local dark matter halo. MIMPs arise naturally in unifying theories that predict colored and electroweak-stable states, as well as in supersymmetric models, and can be produced out of thermal equilibrium in the early Universe.

Considering their large kinetic energy and per-nucleon cross-sections in the $10^{-40} - 10^{-20}$ cm$^2$ range, MIMPs are expected to undergo multiple scatterings while traversing a detector, thus making their analysis viable in the COSINE-100 experiment, which searches for dark matter directly through three detectors: muon panels, scintillating liquid and NaI(Tl) crystals.

In this work, we present the apparent MIMP signal at COSINE-100 modeled by means of GEANT4 simulations that incorporate the full detector geometry. Furthermore, we discuss the future analysis based on 5.8 years of COSINE-100 data, along with parameter space prospects on MIMP search.

Speaker: Vitor Machado (University of São Paulo)

Pôster.pdf

7:14 PM Search for the associated production of a Higgs boson and a single top quark in the 𝑯 → 𝝉𝝉 decay mode and combined measurement of tH production using pp collisions at 13 TeV with the ATLAS detector

A search for the production of a Higgs boson in association with a single top quark in multi-lepton final states including a 𝜏 lepton is presented, using an integrated luminosity of 140/fb of proton–proton collision data at a centre-of-mass energy of √𝑠 = 13 TeV collected by the ATLAS detector at the LHC. The analysis targets the 𝐻 → 𝜏𝜏 decay, where at least one 𝜏-lepton decays hadronically, to indicate the presence of the Standard Model Higgs boson. No significant excess over the expected background is observed, and an observed (expected) upper limit at the 95% confidence level on the signal strength is set at 8.6 (9.3) times the Standard Model prediction. This measurement is combined with previous publications of the ATLAS collaboration targeting the same production process but in different final states. The combined measurement of the signal strength yields 𝜇(𝑡𝐻) = 4.5 +2.3(−2.1) = 4.5 ± 1.5 (stat.) +1.7(−1.4) (sys.) times the Standard Model expectation, corresponding to an observed tH significance of 2.3 standard deviations. The combined observed (expected) upper limit at the 95% confidence level on the signal strength is set at 8.5 (3.9) times the Standard Model prediction.

Speaker: Andre Sopczak (Czech Technical University in Prague (CZ))

poster_A0_Sopczak_for_print.pdf

7:15 PM Real-Time Parametric Hypothesis Testing for Faster Skipper-CCD Readout

Skipper-CCD technology currently leads the search for light dark matter in underground experiments (SENSEI and DAMIC), and for fractionally charged particles at nuclear reactors (CONNIE and Atucha II). By applying Skipper technology in silicon CCD, sub-electron noise levels can be achieved through multiple non-destructive measurements of the same charge. The cost to pay are longer readout times, which in some cases can extend to several hours. In this work, we evaluate the impact of a real-time parametric hypothesis test to reduce the number of samples required to discriminate between empty and occupied pixels. We analyze how the resulting reduction affects known background contributions, such as amplifier-induced light during sampling and dark current. The implementation of this approach is studied through simulations of the sensor’s continuous readout. The results demonstrate substantial reductions in readout time and, consequently, in the aforementioned background contributions. We also examine how this reduction would affect existing results in searches for dark matter and exotic particles in neutrino physics.

Speaker: Lara Sofía Barreiro (Universidad de Buenos Aires (Argentina))

Poster-ICHEP-7.pdf

7:16 PM Thermoelectric response of the QGP medium in a novel relaxation time approximation model

The medium produced in heavy ion collisions develops a temperature gradient between its central and peripheral regions, which can induce an electric field through the Seebeck effect. The strength of this effect is quantified by the Seebeck coefficient, defined as the induced electric field per unit temperature gradient in the absence of electric current. We calculate the Seebeck coefficient of the quark-gluon plasma (QGP) medium using the relativistic Boltzmann transport equation within a recently developed novel relaxation time approximation (RTA) model. Contributions from individual quark flavors as well as from the QGP medium are analyzed, with particular emphasis on their dependence on the temperature and chemical potential. For fixed current quark masses, we find that the magnitude of the Seebeck coefficient decreases with increasing temperature and increases with chemical potential. Partonic interactions are further incorporated through perturbative thermal QCD within a quasiparticle framework. Comparison with the standard RTA model shows a noticeable suppression of the Seebeck coefficient in the novel RTA model, implying a weaker thermally induced electric field in the QGP medium. Additionally, while the Seebeck coefficient becomes slightly negative at high temperatures in the noninteracting case, it remains positive over the entire temperature range in the quasiparticle framework.

Speaker: Dr Shubhalaxmi Rath (Universidad Mayor)

PosterICHEP2026_Shubhalaxmi.pdf

7:18 PM Mueller-Navelet Jets in Diffractive Processes at LHC and FCC energies

We investigate the diffractive Mueller-Navelet jets production in $pp$ collisions in the high-energy (small-$x$) regime, where the final-state objects are characterized by large transverse momenta and are separated by a wide rapidity interval. This semi-hard configuration provides an ideal testing ground for the BFKL resummation of energy logarithms within the framework of high-energy factorization.

We present phenomenological predictions at next-to-leading accuracy (NLA), focusing on differential cross sections and azimuthal-angle correlations, described through a Fourier expansion in terms of coefficients $C_n$. Particular attention is devoted to the study of ratios $C_n/C_0$, which are known to be especially sensitive to BFKL dynamics while being relatively stable under higher-order corrections. We analyze the impact of NLA effects, the dependence on renormalization and factorization scales, and the role of optimization procedures such as the BLM prescription.

Speaker: João Vitor Bulhões da Silva

poster.pdf

7:19 PM SHELDON for new liquid scintillators characterizartion

Neutrino physics is a highly active field, which, in spite of enormous progress made in the past decades, still have open issues to be address.
So far, the most effective detection technique has proven to be liquid scintillators and water Cherenkov detectors. Despite their advantages, both also have limitations. In scintillators, the emitted light is isotropic, therefore the information on the direction of the incoming particle is lost, while is preserved with Cherenkov light. On the other hand, Cherenkov detectors are limited by low Light Yield and high energy thresholds.
To overcome this limitations, in the past years a huge effort by the liquid scintillator community has started, trying to combine the advantages of Cherenkov and scintillation radiation in hybrid detectors. Given the development and spread of these new scintillators, the possibility of a proper characterization is needed.
In this poster, I will introduce the Milano Liquid Scintillator facility, called SHELDON (Separation of cHErenkov Light for Directionality Of Neutrinos), developed to fully characterize standard liquid scintillators but also novel liquids. This facility consists of different units, each designed to analyze specific optical properties: emission time profile, absorption and emission spectra, Light Yield, refractive index and group velocity.

Speaker: Fatima Houria

Poster_ICHEP.pdf

7:20 PM Real-time measurement of luminosity and beam spot properties with FPGA-based hit reconstruction at LHCb

The upgraded LHCb experiment is pioneering the landscape of real-time data-processing using an heterogeneous computing infrastructure. For the first time at any LHC experiment, bidimensional clusters of active pixels on the silicon vertex detector are reconstructed with a real-time FPGA-based architecture before event-building, directly at detector readout, at a rate of ~30MHz. In addition to saving HLT1 computing resources and reducing the DAQ bandwidth, the availability of particle hits at the readout level opens up the possibility of further processing aimed at reconstructing more complex quantities. We leverage this architecture to measure and track the collider luminosity and the geometrical properties of the luminous region in real time. For such purpose, a set of programmable counters has been implemented in firmware. These counters uses minimal FPGA resources and are analysed to provide luminosity and beam spot position, shape and inclination. These quantities are computed in real time on the LHCb slow control software. This method differs substantially from the usual techniques relying on track and vertex reconstruction, prone to misalignment biases and dependent on the HLT. In this contribution, we describe the technical implementation of such a system and report the results obtained with real data collected in 2024-2025.

Speaker: Elena Graverini (University of Pisa (IT) and EPFL - Ecole Polytechnique Federale Lausanne (CH))

poster.pdf

7:23 PM The History of Brasil’s Participation in CERN

The research seeks to understand how scientists from Brazilian research institutions became involved in CERN experiments and what obstacles may have hindered their participation. To this end, we consulted CERN’s own historical archives, from which approximately 800 pages of documents were collected. In addition, information was gathered through an oral history project in which 12 prominent researchers shared their experiences at CERN through semi-structured interviews.
Our account of this history is organized around three key phases. In the early 1980s, collaboration with CERN was driven primarily by individual initiatives with minimal institutional support. In a second moment, Fermilab—under the leadership of Leon Lederman—began strengthening its ties with Latin America, prompting CERN to undertake similar efforts in the 1990s. From the 2000s onward, many researchers who had been working in the United States transitioned to CERN, which sought to expand its pool of collaborators to support research at the LHC.
This narrative highlights two distinct modes of Brazil’s involvement in CERN experiments: participation as a user, in which Brazilian researchers contribute mainly to data analysis, and participation as a contributor to the construction of experiments, including the provision of essential technologies.

Speaker: Dr Ivã Gurgel (Universidade de São Paulo)

7:24 PM Electric‑Field Calibration with a Steerable UV‑Laser in ProtoDUNE‑HD

The Deep Underground Neutrino Experiment (DUNE) requires a precise knowledge of the electric field in its liquid argon time projection chambers to control systematic uncertainties in energy reconstruction and track topology. ProtoDUNEs at CERN provide full‑scale test‑beds to develop and validate calibration strategies for the DUNE far detector. A steerable UV‑laser system has been installed to generate straight, well‑defined ionization tracks throughout the detector volume, enabling detailed studies of electric‑field distortions and charge transport properties in liquid argon. In this contribution, I will present the current status of the UV‑laser calibration program in ProtoDUNE‑HD, including progress on laser‑track reconstruction and initial assessments of drift velocity and electric‑field response. I will discuss the analysis techniques developed to quantify spatial distortions and drift‑time variations, as well as comparisons with dedicated simulation studies. Finally, I will outline the next steps toward a full electric‑field map and how these efforts are being integrated into the DUNE calibration framework to improve the accuracy of physics analyses in the far detector.

Speaker: Wallison Luiz Anicezio Campanelli (Laboratory of Instrumentation and Experimental Particle Physics (PT))

Poster-for-ICHEP-school_finalversion.pdf

7:25 PM Development and Characterization of Sensors and Electronics for the ATLAS High-Granularity Timing Detector

The increase of the instantaneous luminosity delivery to the ATLAS Detector during HL-LHC operation will result in 200 simultaneous collisions at every 25 ns. Separating the hard scatter from the pile-up requires a spatial resolution impossible to be attained at rapidities above |η| > 2.4 by the new ATLAS semiconductor tracker (ITk), which will extend the tracking coverage in ATLAS up to |η| < 4. A new ATLAS subsystem, the High Granularity Timing Detector (HGTD), currently under construction, will provide timing information with picosecond precision for a 4D-tracking approach implemented to mitigate the effects of pile-up. The HGTD is a semiconductor-based detector relying on LGAD sensors, a novel type of radiation-hard silicon sensor capable of 30 ps timing resolution measurements for MIPs. Around 3.7 million channels will be readout, covering an area of 6.4 m2 of silicon. This presentation focuses on the extensive research and development efforts undertaken by the HGTD project, including the design and characterization of the all new LGADs, demonstrating their timing performance and radiation hardness using high-energy particle beams, the development of a custom integrated readout circuit capable of precise time measurements and the integration of these components within the HGTD readout system.

Speaker: Mei Zhao (Chinese Academy of Sciences (CN))

Poster for HGTD-ZM-20260731ICHEP.pdf

7:26 PM MID: a muon detector for the ALICE 3 upgrade project

The success of the ALICE programme has allowed to study the hottest state of matter created in the laboratory: the strongly-interacting quark–gluon plasma (sQGP). However, some fundamental questions on the sQGP and other aspects of the strong interaction will still remain open even after LHC Run 4. To address this, the ALICE collaboration has proposed a major upgrade of its detector, known as ALICE 3. Among the subdetectors considered in this upgrade there is the muon identification detector (MID) aimed at contributing to the study of charmonium and exotic hadron production in heavy-ion collisions. While the baseline design consists of plastic-scintillator-based chambers placed around a cylindrical magnetic iron absorber, different detector technologies are under evaluation for the MID, including multi-wire proportional chambers.

In this contribution, the status of GEANT4 simulations and FLUKA calculations of the radiation load during LHC Run 5 will be presented, together with the construction and CERN T10 test-beam results of a prototype composed of 48 FNAL-NICADD scintillator bars ($100\times4\times1$ cm$^{3}$) with Kuraray WLS fibers and Hamamatsu silicon photomultipliers, tested using 3 GeV/$c$ muon and pion beams and analyzed with Machine Learning techniques. The muon efficiency as well as the hadron suppression will be discussed.

Speaker: Jesus Eduardo Munoz Mendez (Universidad Nacional Autonoma (MX))

Poster-MID_testbeams_v3.pdf

7:27 PM Neutrino Polarizability and Single-Photon

We investigate enhanced neutrino polarizability induced by a light pseudoscalar mediator as a potential source of single-photon excesses observed in short-baseline neutrino experiments such as MicroBooNE and MiniBooNE. Integrating out the light mediator yields a dimension-7 effective operator that drives the process ν e → ν γ e, producing isolated electromagnetic showers detectable in liquid argon time projection chambers (LArTPCs).
We calculate the corresponding cross sections and expected event rates using realistic neutrino beams and detector response. The resulting parameter space is compatible with existing constraints from collider searches and astrophysical observations. Predictions for near-future LArTPC experiments (SBND, DUNE Near Detector) indicate good sensitivity to this type of new physics.
Distinct kinematic signatures enable effective separation from dominant neutral-current backgrounds. Compared to dark matter portal interpretations, neutrino polarizability offers a minimal and directly testable extension of the Standard Model to account for these anomalies and probe light new physics at neutrino facilities.

Speaker: KIMY JOHANA AGUDELO JARAMILLO (Universidad Catolica del Norte)

Poster_ICHEP-1.pdf

7:28 PM Compact, Long-Range, and Vacuumless Defects in Flat and Warped Spacetimes

Topological defects such as kinks, domain walls, vortices, and monopoles play an essential role in many areas of physics, from condensed matter systems to high-energy field theory and cosmology. In (1+1) dimensions, kinklike configurations arising from real scalar fields are simple examples of such structures. Among the wide variety of scalar models, special attention has been devoted to those supporting compactons, which are field solutions completely localized in a finite spatial region. Furthermore, there are models generating long-range and vacuumless defects.

In this work, we study real scalar field theories admitting compact, long-range, and vacuumless configurations. We construct kinks using a first-order (BPS-type) formalism and analyze how the solution, energy, and linear stability are affected by the scalar potential.

These models are then embedded into a five-dimensional warped geometry. We show that the defect solution directly determines the resulting brane structure: compact limits generate hybrid branes with thick cores and thin tails, while long-range and vacuumless defects lead to thick branes. The results show that the regimes investigated also play an interesting role in the case of a five-dimensional warped geometry.

Speaker: Elisama Lima (IFBA)

Compact, Long-Range, and Vacuumless Defects in Flat and Warped Spacetimes.pdf

7:29 PM NON-RELATIVISTIC ANALYSIS OF BOUND STATES IN QCD IN N-DIMENSIONAL SPACES AT FINITE TEMPERATURE

This work aims to develop a theoretical and numerical analysis of bound states in Quantum Chromodynamics (QCD), considering systems composed of quarks and antiquarks (heavy/light mesons) and those composed exclusively of gluonic fields (glueballs). The main objective of this work will be to study, from a non-relativistic perspective, the masses of these bound states in relation to spaces of arbitrary dimensionality N, at finite temperature. To describe the heavy/light mesons, the Schrödinger Equation will be used, with the application of temperature-adjusted potential models, such as the Modified Cornell potential. Relativistic corrections will be incorporated into the potential models, as well as dimensionality extensions, to evaluate their influence on the obtained mass spectra. The results will be compared with experimental data provided by the Particle Data Group (PDG), which will allow us to evaluate the effectiveness of the potentials used. Next, the same parameters will be applied to estimate the glueballs' mass spectrum, also adopting a non-relativistic approach and considering thermal effects. Comparing the results with data from lattice QCD simulations and other theoretical studies aims to contribute to the construction of a solid foundation for future, more comprehensive investigations into the structure of glueballs in different dimensional and thermal.

Speaker: Ms Carolaine Oliveira (IFPI - Instituto Federal do Piauí)

banner_ichep_final.pdf

7:30 PM Long-Lived Particles as a way of probing Super-WIMPs and the Re-heating Temperature at Colliders

We study an extension to the Standard Model where Dark Matter is produced via the Super-WIMP mechanism. In this scenario, relic density strongly depends on the Re-heating temperature. We identify the region of the parameter space that can be probed at collider facilities using Long-Lived particle searches, establishing methods for indirectly constraining the Re-heating temperature at colliders.

Speaker: Paulo Areyuna

poster_areyuna.pdf

7:30 PM Optical Response and Veto Performance Simulation of the PoWER Prototype for DUNE Phase II

The Deep Underground Neutrino Experiment (DUNE) is a next-generation long-baseline neutrino experiment designed to study neutrino oscillations, neutrino mass ordering, and CP violation using large liquid-argon time projection chambers (LArTPCs). Currently, a prototype of a new photodetection system, called PoWER, is under development and may contribute to the DUNE experiment by enabling the determination of whether events occurred in the active volume or in the external (buffer) volume of the detector. The objective of this work is to understand how the position of the radioactive source affects light collection by the silicon photomultipliers (SiPMs), enabling analysis of the detector’s behavior across different regions. We performed a Geant4 simulation of the prototype using an alpha-particle source placed at several positions. We obtained the veto as the ratio of vacuum ultraviolet (VUV) to total light collection by the SiPMs. With the source in the inner region, we obtained a veto value of 0.14, and in the outer region, it ranged from 0.72 to 1.0.
These results agree with the fact that in the buffer zone, light is not converted to visible light. The simulation shows that it is possible to identify whether the source was inside or outside the inner chamber.

Speaker: Isabel Ribas

Poster_ICHEP2026-1.pdf

7:32 PM Development of an interactive ionizing radiation detector simulator for educational purposes

This work aims to simulate the radioactive source, detector, detection electronics, and analog-to-digital converter system, generally used for the determination, in multichannel technology, of the energy spectrum of γ and β emitting sources. It is important to emphasize that the manipulation of radioactive sources by undergraduate students in Physics or Engineering can be a fearful or even dangerous practice. Furthermore, for some secondary or higher education institutions, obtaining authorization from the National Nuclear Energy Commission (CNEN) to obtain, transport, and store radioactive sources can become a bureaucratic and complex task. In contrast to the aforementioned limitations and difficulties, simulating radioactive sources from photons emitted by light-emitting diodes (LEDs), particularly IR LEDs, has the virtue of not being radiations visible to the naked eye, nor ionizing, which allows an adequate mimicry of radioactive sources.

Speaker: Pedro Eduardo Gonçalves Oliveira (Universidade Federal da Bahia)

Poster - Pedro Oliveira.pdf

7:35 PM First Measurement of Charged Current Muon Neutrino Induced Kaon Production on Argon

MicroBooNE is an 85-tonne active mass liquid argon time projection chamber (LArTPC) neutrino detector exposed to the Booster Neutrino Beamline (BNB) at Fermilab. One of the key physics goals is the precise measurement of neutrino interactions on argon in the 1 GeV energy regime. The study of strange and heavier meson production in neutrino interactions, in particular final states containing K⁺, will help to improve the background estimates for future nucleon decay searches in experiments such as DUNE, provide valuable input for improving neutrino generator models, and will allow the development of techniques to enhance the particle identification capabilities of LArTPCs. In this poster, we present the first-ever cross-section measurements of charged current muon neutrino-induced kaon production on argon at MicroBooNE.

Speaker: David Martinez Caicedo (South Dakota School of Mines and Technology)

7:36 PM Update on Standalone Geant4 Simulation Framework for the PoWER Photodetector in DUNE Phase II

The Deep Underground Neutrino Experiment (DUNE) will utilize Liquid Argon Time Projection Chamber (LArTPC) technology to address key questions in neutrino physics, such as Charge-Parity (CP) violation and the neutrino mass ordering. The Phase II Far Detector modules will employ vertical drift single-phase LArTPCs with an active volume of 13 m × 13 m × 60 m and dual anode planes. A novel photon detection system (PDS) concept, named PoWER (Polymer Wavelength-shifter and Enhanced Reflection), is proposed. The design features full coverage of the field cage with polymeric wavelength-shifting foils made of polyethylene naphthalate (PEN), combined with Enhanced Specular Reflector (ESR) panels and arrays of Light Detection Units (LDUs) mounted on the cryostat membrane. This contribution presents an update on standalone Monte Carlo simulation studies based on the Geant4 framework, including new optimization designs and the influence of ESR foils on the veto system.

Speaker: Luciana Hirsch (UTFPR)

7:37 PM Test of the “Running Axial Mass” Model Using Accelerator Neutrino Data

Accurate modeling of neutrino-nucleus interactions is essential for accelerator neutrino oscillation experiments. Therefore, theoretical models capable of providing a consistent description of data at different energies, targets, and experimental conditions are of particular interest. We present an updated study of the phenomenological "running axial mass" model using data from the NOvA Near Detector. In a previous study, the model was tested on muon-neutrino charged current interactions and showed good agreement with NOvA measurements without additional tuning. In this update, the analysis is expanded to include additional NOvA data sets, considering electron-neutrino charged current interactions and antineutrino data. Model predictions are compared with measured inclusive and differential cross sections averaged over the accelerator neutrino fluxes. The simulations are performed using the GENIE neutrino event generator, where the "running axial mass" model is implemented as an alternative tune. Comparisons with other theoretical models available in GENIE are discussed. The feasibility of comparing the model with data from other accelerator neutrino experiments, such as T2K, is also explored to provide a more comprehensive test of neutrino-nucleus interaction models.

Speaker: Игорь Kakorin

7:39 PM Plasmoid-Mediated Magnetic Reconnection in Magnetized Plasmas

The dynamics of magnetized plasmas are governed by fundamental physical processes that play a decisive role in the design and optimization of magnetic confinement systems. From a theoretical perspective, this work examines magnetic reconnection as a key mechanism responsible for the reorganization of magnetic field topology and its influence on plasma stability and confinement performance.

Magnetic reconnection enables the conversion of energy stored in the magnetic field into kinetic and thermal energy of the particles, and is closely associated with the onset of instabilities, anomalous transport, and plasma relaxation events. Different physical models describing reconnection in highly conducting plasmas are considered, together with their relevance for magnetic confinement configurations in the context of fusion research.

In addition, the role of turbulence is analyzed as a process that modulates reconnection rates and governs energy and particle transport across magnetic field lines. The theoretical framework discussed provides a basis for the development of computational studies and numerical simulations aimed at exploring these phenomena across different plasma regimes. The results and perspectives presented are relevant for both laboratory plasmas and astrophysical systems.

Speaker: Johan Gabriel Cortes Valencia (Universidad del Cauca)

ICHEP2026_poster_Johan_Cortes.pdf

7:41 PM Development and Testing of a Plastic Scintillator-Based Compact Test and Trigger System with SiPM Readout and Custom Electronics

We present the design and characterization of a fully indigenous, compact plastic scintillator-based test and trigger system employing silicon photomultipliers (SiPMs) and custom-developed electronics. The system uses extruded plastic scintillator (EPS) paddles integrated with wavelength-shifting (WLS) fibers coupled to SiPMs.

Two custom, dedicated bias supplies are incorporated in the design to power the test and trigger SiPMs independently. These supplies ensure stable SiPM operation by providing regulated bias voltage with integrated digital control and monitoring. Signal readout and processing are handled by in-house front-end electronics incorporating transimpedance amplifiers, threshold discriminators, and pulse-shaping stages, followed by digital logic implementing three- and four-fold coincidence detection. Data acquisition (DAQ) is managed by an STM32 microcontroller, which performs real-time event counting using its internal hardware timers configured as counters, a cost-effective and flexible alternative to FPGA-based systems, simplifying both development and deployment.

The system adopts a modular architecture, with each unit functioning as an independent module, and offers user-friendly operation through physical controls and displays. The integrated design provides a reliable, scalable solution for compact cosmic-ray detection and trigger applications. This is used in many different schools to train younger generations on the basic principle of SiPM as well as the cosmic muon spectrum.

Speaker: Prajjalak Chattopadhyay (Tata Institute of Fundamental Research, Mumbai)

main.pdf

7:43 PM TEMPERATURE-DEPENDENT OPTICAL PROPERTIES OF WAVELENGTH SHIFTERS USED UN HIGH-ENERGY PHYSICS EXPERIMENT

Wavelength shifters(WLS) are widely used in high-energy physics experiments to convert ultraviolet and vacuum-ultraviolet radiation into wavelengths matched to the spectral sensitivity of photodetectors. Among the most commonly employed materials are p-terphenyl (PTP), tetraphenyl butadiene (TPB), and polyethylene naphthalate (PEN), which are used in scintillation detectors, cryogenic setups, and optical readout systems based on photomultiplier tubes and silicon photomultipliers. In this work, the optical properties of these WLS are investigated through measurements of absorption and emission spectra as a function of temperature. The objective is to assess the impact of temperature on spectral conversion efficiency and optical stability. The observed temperature dependence is discussed in terms of the interplay between radiative and non-radiative processes. Increasing temperature enhances non-radiative relaxation mechanisms associated with thermal quenching, resulting in a reduction of the emission quantum yield. In addition, stronger electron–phonon coupling leads to spectral broadening and possible peak shifts, reflecting the increased contribution of vibrational modes to the excited-state dynamics. Temperature-induced structural effects, such as thermal expansion and conformational changes, may further modify the local electronic environment of the emitting centers, affecting both absorption and emission spectra. These results are relevant for the optimization of WLS performance in environments with varying thermal conditions.

Speaker: Ana Paula Mendonça (Universidade Estadual de Campinas - UNICAMP)

7:44 PM Development of a Hodoscope for Testing and Characterization of WCD Detectors for SWGO

Here we present an hodoscope setup developed in CBPF, Rio de Janeiro, to characterize water-Cherenkov detectors (WCDs). The setup was developed to aid the development of the Southern Wide-Field Gamma-ray Observatory (SWGO), an international collaboration that will build a major WCD-based array for gamma-ray astronomy in the Atacama Astronomical Park in Chile, at 4770 m a.s.l. The array will be used to detect, identify and reconstruct Extensive Air Showers (EASs) initiated by photons with energies from a few hundred GeV to the PeV scale. Our hodoscope will be used to evaluate different WCD design candidates and their performance, by analyzing their response to crossing EAS muons in function of their trajectory through the detector. The hodoscope has a bottom detector plane made of Resistive Plate Chambers, and a top detector plane made of Plastic Scintillator bars that is mounted over the tanks, allowing to accommodate tank designs with heights up to 3 m. A Geant4 framework has been developed to simulate the setup (WCD included) and provide insight for future measurements. Currently, the setup is testing a tank employing a multi-PMT design similar to the KM3NeT Digital Optical Modules, developed by the SWGO team at the University of Naples.

Speaker: Guilherme Ferreira Franco (Brazilian Center for Physics Research (CBPF))

main.pdf

7:45 PM Pile-up event reconstruction for enhanced energy resolution at liquid scintillator detectors

Liquid scintillator detectors have assumed significant importance in neutrino physics owing to their cost-effectiveness and high precision. The determination of the neutrino mass ordering, the search for neutrinoless double-beta decay, and similar efforts impose increasingly stringent requirements on the energy resolution of liquid scintillator detectors. However, backgrounds such as C14 can lead to the formation of pile-up events, which degrade the energy resolution. We describe the detector response using the spatio‑temporal Poisson density of photoelectrons (PEs) and have developed a photon‑by‑photon event reconstruction method based on Markov Chain Monte Carlo. By leveraging the additivity of Poisson processes, we extend the single‑site reconstruction algorithm to a multi‑site approach. On simulated data, this method can remove the smear effect induced by C14 within uncertainties, thereby recovering the energy resolution. This method can be applied to experiments such as the Jiangmen Underground Neutrino Observatory (JUNO) and the Jinping Neutrino Experiment (JNE) in the future to enhance the detector energy resolution.

Speaker: chuang xu (Department of Engineering Physics, Tsinghua University)

poster.pdf

7:46 PM The ATLAS Trigger Menu in the LHC Run 3

The ATLAS experiment during LHC Run 3 is recording up to 3 kHz of fully-built physics collision events out of an LHC bunch crossing rate of up to 40 MHz, with additional rate dedicated to partial readout. A two-level trigger system selects events of interest to cover a wide variety of physics signatures while rejecting a high rate of background events. The selection of events, defined by the trigger menu, targets both generic physics signatures, such as high-pT leptons, jets, missing energy, as well as more specific signatures, such as long-lived particles, or di-Higgs events. An overview of the ATLAS trigger menu will be presented, highlighting the performance of the developments introduced during Run 3, such as the improved resource usage during the luminosity decays during the end-of-fill period of an LHC run.

Speaker: Jean Yves Beaucamp (La Plata)

Trigger_Menu_ICHEP2026.pdf

7:48 PM Performance and Background Mitigation of the Skipper-CCDs Multi-Chip Module in CONNIE

CONNIE (Coherent Neutrino–Nucleus Interaction Experiment) aims to measure coherent elastic electron antineutrino–nucleus scattering (CEνNS) using silicon detectors. The experiment is located near the Angra-2 nuclear power plant in Brazil, which provides an intense source of reactor antineutrinos. CONNIE employs pixelated silicon detectors based on charge-coupled device (CCD) technology, in which particle interactions deposit charge that is subsequently read out at the pixel level. CONNIE currently operates a Multi-Chip Module consisting of a 4 x 4 array of Skipper-CCDs. The Skipper-CCD technology enables non-destructive multiple readouts, achieving sub-electron readout noise and significantly enhancing sensitivity to low-energy interactions. This capability allows the identification of background events that can mimic CEνNS signals if not properly treated. A dedicated pixel-selection procedure has been developed to identify and exclude subsets of pixels affected by such spurious events.The method is based on examining pixel charge distributions to identify irregularities. The selection is optimized to suppress background contributions while minimizing the loss of active detector area and effective exposure. In this contribution, we present recent advances in the performance characterization and data analysis, and demonstrate how an optimized pixel-selection strategy improves the effective energy resolution and overall data quality, thereby strengthening the sensitivity of CONNIE.

Speaker: Patrick Lemos

Patrick_Lemos_ICHEP-v1.pdf

7:49 PM Effect of Invisible Neutrino Decay in DUNE

The discovery that neutrinos oscillate and have mass opens the possibility to investigate Beyond Standard Model (BSM) physics. The high precision era of the next-generation experiments allows us to analyse models such as sterile neutrinos, non-standard neutrino interactions, and neutrino decay. As a consequence of their non-zero mass, we can consider that neutrinos could decay. An interesting scenario is where the third neutrino mass eigenstate $\nu_3$ decays into an invisible state, for instance a sterile neutrino. In this poster, we investigate the DUNE (Deep Underground Neutrino Experiment) sensitivity for the invisible neutrino decay of the $\nu_3$ using a simulation based on GLoBES (General Long Baseline Experiment Simulator). DUNE is one of the next-generation experiments with sophisticated detectors designed to study neutrino properties. It consists of a near and a far detector with a 1300 km baseline between them, both employing Liquid Argon Time Projection Chamber (LArTPC) technology. We report the validation of our analysis through the reproduction of the standard oscillation sensitivities and cross-checks with results available in the literature for the oscillation with decay model. We also investigate the impact of neutrino decay on standard oscillation parameters and perform preliminary bounds on the neutrino decay lifetime parameter.

Speaker: DAVI DE ASSIS CAMARGOS (Universidade Federal de Goiás)

poster_ICHEP_2026_neutrino_decay_v3.pdf

7:50 PM Impact of LIV Effects Induced by Quantum-Gravity–Motivated Modified Dispersion Relations on Neutrino Coherence Length

Lorentz Invariance Violation may arise in several approaches of Quantum Gravity theories, where microscopic space-time fluctuations can induce modified dispersion relations, causing energetic particles to propagate at different effective velocities. Neutrinos are particularly well-suited particles to probe such effects due to their tiny masses, weak interactions, and ability to propagate coherently over macroscopic and astrophysical distances.
In this work, we investigate how QG-induced fluctuations and LIV effects can impact neutrino coherence, modifying the standard oscillation framework. We propose an effective neutrino coherence length that incorporates QG induced decoherence effects, beyond the conventional wave-packet separation mechanism. Analytical expressions for the modified coherence length are derived, and their dependence on neutrino energy and on the parameters characterizing the quantum-gravity–motivated modified dispersion relation is analyzed. We apply this framework to simulations of neutrinos emitted from core-collapse supernovae, where galactic-scale propagation distances enhance sensitivity to coherence-loss effects.
We discuss the phenomenological implications of these results for supernova neutrino observations as well as for long-baseline neutrino oscillation experiments employing large-mass liquid argon detectors, highlighting their potential to constrain LIV and QG-inspired scenarios through deviations from the standard oscillation pattern.

Speaker: Mr Luiz Paulo Accorsi do Vale (UTFPR)

Poster_Wave_Packet_Decoherence_from_Modified_Dispersion_Relations_at_DUNE___Luiz_Accorsi.pdf

7:53 PM Light vector meson photoproduction in ultraperipheral heavy ion collisions at the LHC within the Reggeometric Pomeron approach

By using the Reggeometric Pomeron model for vector meson production which successfully describes the high energy lepton-nucleon data, we analyse the light meson production in ultra-peripheral heavy ion collisions at the Large Hadron Collider (LHC). The rapidity distributions for $\rho$ and $\phi$ photoproduction in lead-lead, xenon-xenon, neon-neon, and oxygen-oxygen collisions are investigated.

Speaker: Érison Rocha (UFRGS)

Erison_Rocha_poster_ICHEP_2026_Natal_Brazil.pdf

7:55 PM Production of heavy-flavour particles and charmonia in pp collisions with PYTHIA

The production of heavy-flavour particles and charmonia in proton--proton (pp) collisions plays an important role in the understanding of Quantum Chromodynamics, providing a way to test theoretical calculations of both hard and soft processes. In this study, the production of $J/\psi$ and heavy-flavour hadrons in pp collisions is investigated using Monte Carlo simulations performed with PYTHIA 8. Transverse-momentum differential cross sections are obtained for inclusive $J/\psi$ in pp collisions at $\sqrt{s} = 7~\mathrm{TeV}$ within mid-rapidity $|y| < 0.9$ and for non-prompt $D^{0}$, $D^{+}$, and $D_{s}^{+}$ mesons in pp collisions at $\sqrt{s} = 5.02~\mathrm{TeV}$ within $|y| < 0.5$. The results are compared with LHC data in order to evaluate the relative contributions of soft and hard processes implemented in the generator. The comparison shows that minimum-bias simulations dominated by soft interactions provide a better description of the data than hard-process configurations, although the overall agreement remains limited. These observations motivate further systematic studies and refined simulations to better constrain the interplay between soft and hard QCD dynamics in heavy-flavour production.

Speaker: Pedro Silva

Poster_ICHEP_V2 (4) (1).pdf

7:56 PM Heavy and exotic hadron production at forward rapidities in high-energy proton-proton collisions

We present a unified, Color Glass Condensate-based analysis of heavy-particle production at forward rapidities in proton-proton collisions at high-energies, examining both conventional $D^0$ mesons and exotic, fully charmed tetraquarks $T_{4c}$. Using hybrid factorization with rcBK evolved dipole distributions, we include gluon- and charm-initiated processes along with their fragmentation into the desired final state and assess the impact of an intrinsic charm component in the proton wave-function.For $D^0$ mesons, we show that current LHCb data are well described, with the charm-initiated contribution growing significantly at forward rapidities, especially if intrinsic charm is present; predictions for the correlation of $D^0$ and charged particle production for different multiplicity classes are also provided. For $T_{4c}$ states, it is shown that the tensor configuration $(2^{++})$ dominates via gluon fragmentation, while the axial-vector state $(1^{+-})$ is produced mainly through charm fragmentation and may serve as a valuable probe of the intrinsic charm hypothesis. Our results highlight forward production as a sensitive test of the CGC framework and the proton's charm content, with predictions provided for the LHC and the FCC energies.

Speaker: Yuri do Nascimento Lima (Universidade de Sao Paulo (USP) (BR))

T4cproductionppcollisions.pdf

7:59 PM Commissioning and Validation of the CMS HGCAL SiPM-on-Tile System

For the upcoming high-luminosity LHC, the endcap calorimeters of the CMS experiment will be replaced by the high-granularity calorimeter (HGCAL). HGCAL is a sampling calorimeter using both silicon and scintillator as active materials in different regions depending on the radiation dose. The scintillator-based part of HGCAL consists of 4000 detector modules, each hosting between 24 and 144 plastic scintillator tiles and SiPMs, covering a total area of 370 m² with 280k readout channels. Up to five tile modules are read out through a motherboard, which houses data concentrator ASICs and provides an optical link to the Serenity back-end boards. In this contribution, we introduce HGCAL's scintillator section and present how the system was validated: First, we have tested the complete pre-series readout chain in a particle beam while operating in a 3T magnetic field. Secondly, we have built and tested a stainless steel absorber stack instrumented with fifteen tile modules, with the goal to study the calorimetric and timing performance. And finally, we have commissioned a complete horizontal slice of scintillator tile modules for system tests under realistic grounding and powering conditions. The successful conclusion of these milestones forms an important contribution towards the construction and operation of HGCAL.

Speaker: Fabian Hummer (Karlsruhe Institute of Technology)

SiPM-on-Tile ICHEP Poster v1.1-small.pdf

High resolution version SiPM-on-Tile ICHEP Poster v1.1 1200dpi.pdf

8:00 PM The ATLAS Tile Demonstrator Phase-II Upgrade Module in Run-3

The Tile Calorimeter (TileCal) is a sampling hadronic calorimeter that covers the central region of the ATLAS experiment at the Large Hadron Collider (LHC). The LHC will undergo a series of upgrades leading to the High-Luminosity LHC (HL-LHC). The TileCal Phase-II Upgrade will accommodate the detector readout electronics to meet the challenges of a 1 MHz trigger rate, higher ambient radiation levels, and increased pile-up conditions. The TileCal Phase-II upgrade project has undertaken an extensive R&D program. The Demonstrator Phase-II Upgrade module was built in 2014 with the upgraded readout electronics and backward compatibility with the present ATLAS Trigger and Data Acquisition system. Its electronics were evaluated during test beam campaigns using the CERN SPS fixed target facility. The Demonstrator Phase- II Upgrade module operates under real detector conditions during Run-3. This contribution describes the hardware and software upgrades of the Demonstrator Phase-II Upgrade module and discusses the operations findings from this module within ATLAS, as well as the latest performance results.

Speaker: Stanislav Polacek (Prague CU)

ICHEP2026___ATLAS_TileCal_demonstrator_poster.pdf

8:01 PM Upgrade of the ATLAS Thin Gap Chamber Electronics for HL-LHC

The ATLAS Thin Gap Chambers (TGCs), which form the outer muon detector system, play a key role in triggering high-transverse-momentum muons in the endcap region. To meet the requirements of the ATLAS trigger and data acquisition system at the High-Luminosity LHC, the trigger and readout electronics of the TGC system are being upgraded. Detector signals are rapidly processed by on-detector front-end electronics and transmitted optically to large-scale FPGA boards in the counting room, where a pattern-matching-based track reconstruction algorithm identifies muons. The mass production of approximately 1,500 front-end boards has been completed, and installation will begin at the start of the LHC long shutdown in 2026. The radiation tolerance of the on-detector front-end electronics was verified through in-situ test operation during LHC collisions in 2025, including measurements of the single-event upset rate and validation of the automatic recovery mechanisms. The back-end electronics have reached their final design, and the evaluation of initial production boards has been completed. A full chain of the track reconstruction firmware has been developed and validated. This presentation reports on the readiness of the front-end electronics for installation and on the final design and performance of the back-end system, including results from integrated system tests.

Speaker: Arisa Wada (Nagoya)

26_0731_poster_ICHEP_draftv9.pdf

8:04 PM Updated Bounds on the Minimal Left-Right Symmetric Model from LHC Dilepton Resonance Searches

The Left-Right Symmetric Model (LRSM) is a compelling extension of the Standard Model, predicting the existence of new gauge bosons ($W_R^{\pm}$ and $Z_R$) and right-handed neutrinos ($N_R$). While collider searches typically focus on charged right-handed currents, this work exploits LHC dilepton data ($\sqrt{s} = 13$ TeV, $139$ fb$^{-1}$) to place lower mass bounds on the $Z_R$ boson via the $pp \to Z_R \to \ell^+ \ell^-$ process. By varying the $SU(2)_R$ gauge coupling $g_R$ between $0.4$ and $1.0$, we establish $Z_R$ mass limits ranging from $M_{Z_R} > 4.9$ TeV to $M_{Z_R} > 6.1$ TeV, respectively. Lastly, by leveraging the theoretical mass relation between $Z_R$ and $W_R$ gauge bosons, we translate these results into an independent bound on the $W_R$ mass (e.g., $M_{W_R} > 3.18$ TeV for $g_R = g_L$). Our findings provide a complementary perspective to direct $W_R$ searches, effectively probing an unexplored region of the parameter space where $M_{N_R} > M_{W_R}$, a regime where standard $W_R \to \ell \ell j j$ searches lose sensitivity.

Speaker: Mr Ricardo César Silva Rêgo (UFRN/IIP)

8:06 PM Time-over-Saturation correction method for scintillation signals in liquid argon detectors

The use of liquid argon time projection chambers (LArTPCs) for neutrino experiments provides good tracking resolution and PID capabilities. DUNE is a next generation long-baseline neutrino experiment that will employ LArTPCs to measure neutrino oscillation properties with great precision. Analysis is typically based on the ionization electron (charge) collection with the TPC, but argon is also a prolific scintillator and the detection of scintillation light is done with the photon detection system. The light yield is position dependent and can be very high close to the photon detectors, leading to saturation in some of the recorded signals. We discuss how to better model the correction of saturated signals in order to restore the information lost. We find that recovering just the lost signal instead of the whole charge seems to provide better results and we propose a time-over-saturation method in place of the more commonly known time-over-threshold one. We apply the method to the ProtoDUNE-Vertical Drift simulated data and should also test the model with data taken during the year of 2025. This will benchmark the correction method to be used, providing better calorimetry with light signals for high energy events that reach saturation.

Speaker: Maressa Pimenta Sampaio (University of Campinas UNICAMP (BR))

ICHEP2026_ToSPoster_Maressa.pdf

8:09 PM USE OF A DIFFUSION CLOUD CHAMBER IN AN INTERACTIVE LECTURE DEMONSTRATION ON NUCLEAR RADIATION PHYSICS

Nuclear radiation physics, although essential for scientific literacy, remains scarcely discussed in Brazilian schools, especially due to calendar and curricular constraints. To address this, lectures on this topic may apply methodologies which use class time efficiently, providing the students with basic understanding of nuclear radiation. In this research, we incorporated a diffusion cloud chamber into high school physics classrooms and applied it within a lecture based on the Interactive Lecture Demonstrations (ILD) method proposed by Sokoloff and Thornton. The lectures were structured in four moments: review of previous knowledge; pre-demonstration worksheets; demonstration of the experiment; and post-demonstration worksheets. Debate was incited among groups of students while demonstrating the chamber, requiring them to interpret the results of the experiment. Both worksheets were analyzed using Bardin’s content analysis method. While further analysis of the data is required, preliminary results point to a general increase in answers incorporating scientific knowledge after the lecture. Furthermore, the post-lecture worksheets show an important conceptual shift in understanding the difference between irradiated and contaminated environments. These findings suggest that the proposed ILD using the cloud chamber experiment can help bring nuclear radiation physics into high school lectures in Brazil.

Speakers: DANIEL MENDONÇA VASCONCELOS (Universidade Federal de Sergipe - Campus De Itabaiana), David Goes Costa (Universidade Estadual de Campinas)

Poster ICHEP 2026.pdf

8:10 PM News coverage of the LHC-CERN collaboration in Brazil

In 2024, Brazil became an Associate Member State of CERN, formalizing its national participation in the collaboration that has been ongoing since the 1980s. Brazil has thus assumed a prominent position, with the ability to appoint representatives to collaboration meetings, in addition to expanding the involvement of Brazilians in positions and postgraduate programs. Seeking to understand how journalistic content about CERN and Brazil’s national involvement in the collaboration is communicated, we analyzed news articles from two major Brazilian online newspapers published between 2020 and 2025. We aimed to explore how written content about the collaboration is produced, highlighting the sources consulted, the topics covered, and how the texts are constructed using web scraping tools to collect and organize the data for our analysis. We emphasize the commitment of science journalism to producing high-quality content, as well as fostering critical analysis and dialogue between science and various fields, promoting discussions about national participation in experiments of major global importance and engaging Brazilian society in conversations about science policy within the Latin American scientific context. Finally, we underscore the importance of high-quality communication in enabling the democratization of knowledge through critical engagement and the appropriation of scientific knowledge in this field.

Speaker: Kelly Naomi Matsui

ICHEP_printing.pdf

8:12 PM A Cryogenic Detector for CEvNS Searches at the ν-Angra Reactor Neutrino Experiment

The ν-Angra experiment operates a surface-level, ton-scale water Cherenkov detector at the Angra-II nuclear power plant. The successful operation of the detector has provided a validated platform for reactor antineutrino detection and non-intrusive reactor monitoring. Building on this operational experience, we investigate the feasibility of a second experimental phase based on a cryogenic calorimetric detector aimed at the experimental observation of Coherent Elastic Neutrino–Nucleus Scattering (CEvNS). We present simulation studies of CEvNS event rates for reactor neutrinos at short baselines, exploring different target materials and detector masses, with emphasis on the strong scaling of the coherent crosssection with the neutron number of the target nucleus. A physics-informed modeling of nuclear recoils, phonon production and transport in cryogenic crystals is performed using Monte Carlo techniques, including quenching, phonon propagation and detector response. The simulation results define requirements that are compatible with quantum sensor technologies, such as Transition Edge Sensors and Kinetic Inductance Detectors, targeting sub-eV to few-eV energy thresholds. These results indicate that a compact cryogenic detector, operated within the existing ν-Angra infrastructure, can open a new window for low-energy neutrino physics at a commercial nuclear reactor, with sensitivity to Standard Model CEvNS and potential deviations at low energies.

Speaker: Mrs Ana Clara de Paula Moreira (University of São Paulo)

Cópia de Banner format 90 x 120 cm.pdf

8:13 PM Radiation-Induced Gas-Phase Modifications in Ar-CO₂ Mixtures Investigated in a Dedicated Degradation Chamber for Gaseous Detector Applications

Gas Electron Multipliers (GEMs) are extensively used in high-energy physics due to their excellent spatial resolution, high-rate capability, and radiation tolerance. However, long-term operation under intense irradiation may lead to aging effects, partially driven by radiation-induced modifications of the detector gas mixture. Molecular fragmentation, ionization processes, and the formation of reactive species can alter gas composition and potentially contribute to gain instability and surface degradation phenomena.

We report the development and validation of a dedicated stainless-steel degradation chamber to investigate radiation-induced gas-phase processes under controlled conditions. The system integrates high-precision mass flow controllers delivering a Ar/CO₂(70%/30%) mixture at total flow rate of 8L/h, coupled to a quadrupole mass spectrometer for real-time monitoring of species with mass-to-charge ratios up to 200 amu. Pressure, flow, and environmental parameters are actively stabilized to ensure reproducibility and sensitivity to subtle compositional changes.

The validation was conducted in two stages: a steady-state non-irradiated reference measurement followed by exposure to X-rays from an X-ray tube under identical operating conditions. Comparative spectral analysis reveals irradiation-driven variations in relative mass peak intensities associated with ionization and fragmentation processes. The setup provides a robust platform for systematic studies of gas-phase chemistry relevant to GEM aging in large-scale gaseous detectors.

Speaker: Willian Da Silva (Universidade de Sao Paulo (USP) (BR))

Poster_ICHEP_2026 - Willian Wallace Ribeiro Alves da Silva.pdf

8:14 PM Light Collection Uniformity of a Synchrotron Radiation Detector Based on a LYSO Crystal Matrix

Synchrotron radiation emitted by electrons and positrons passing through a bending dipole magnet provides a key signature for ensuring beam purity in the CERN SPS beam lines. Synchrotron radiation is emitted tangentially to the particle trajectory, and its intensity scales with particle energy. This makes uniform light collection essential for the detector, especially for low energy $e^{\pm}$. In this work, we present a Synchrotron Radiation Detector (SRD) composed of an 8$\times$12 matrix of LYSO crystals, each measuring 4$\times$4$\times$45 $mm^3$, a light guide and an R7600U photomultiplier tube (PMT). The light collection uniformity was measured using a cell by cell scanning setup, in which the center of the 4$\times$4 $mm^2$ face of each crystal was scanned with a reference counter composed of a $^{22}\mathrm{Na}$ source, a tungsten collimator, a $\mathrm{LaBr}_3\mathrm{:Ce}$ crystal, and an R3998-PMT. The SRD light collection uniformity was determined from the 511 keV photopeak measured in the reference counter. The measured light collection variation is within 5%.

Speaker: Marco Ayala (SAPHIR - UNAB)

SRD_LYSO_MAyala.jpg

8:15 PM Now You See Me: Cosmic Rays — Portable Interactive Muon Detectors for Particle Physics Outreach

High energetic cosmic rays constantly bombard Earth, generating cascades of secondary particles in the upper atmosphere that carry valuable information about the universe. Yet, despite living in a continuous ocean of these particles, their presence remains almost entirely unnoticed by the public. To bridge this gap, we have developed highly interactive particle detectors that transform invisible particles into visible signals to educate, engage and inspire the public. This effort has evolved into a unified program of portable, low-cost cosmic-ray muon detectors specifically tailored for education, outreach and field measurements. We adapt modern high-energy physics instrumentation into compact detectors that preserve real measurement capability while providing instant visual feedback. Using plastic scintillators, silicon photomultipliers and custom readout electronics, the systems detect cosmic-ray muons and display their trajectories in real time. Custom-designed readout electronics, together with FPGA–Raspberry Pi–based systems, are used for data acquisition and real-time visualization through LED matrices, three-dimensional LED cubes and mobile application interfaces. The platforms include handheld coincidence counters, portable multi-layer trackers, exhibition-scale demonstrators and emerging networked detector concepts. This poster presents selected implementations and evaluates their impact on outreach, student engagement and on-site studies.

Speaker: Yuvaraj Elangovan (University of Pittsburgh (US))

NowYouSeeMe_shower_A0_portrait.pdf

8:16 PM Cloud chamber: building a prototype using Peltier plates

Cloud chambers were one of the first particle detectors and, even today, are very popular devices in discussions and demonstrations about particle physics. The simplest models use dry ice to create the temperature gradient necessary for visualizing particle tracks. However, despite its relative simplicity, dry ice is not always easy to find. Furthermore, even when dry ice is found, it sublimates quickly, making its storage difficult.
This work highlights the proposal for construction of a prototype in which dry ice has been replaced by Peltier modules, in order to have a device that could be used permanently. To this end, the operating process of Peltier modules and their association to achieve the necessary temperatures were analyzed. An instrumentation study related to the assembly of the prototype was also carried out, considering the electrical connections that should be used and the mechanical elements necessary for assembly. From there, tests were performed to establish the best materials and parameters for the construction of the prototype. The prototype's validation was achieved by visualizing tracks of the same types as those observed in cloud chambers with dry ice.

Speaker: Cleide Matheus Rizzatto (IFSP - campus Suzano)

8:17 PM Analysis of Inclusive Electron Neutrino Charged-Current Events in the SBND Experiment

The Short-Baseline Near Detector (SBND) is a neutrino experiment located at Fermilab (USA). Filled with 112 tons of liquid argon and placed 110 meters away from the neutrino beam target, SBND serves as the near detector of Fermilab's Short-Baseline Neutrino Program, with ICARUS being its far detector. Given its proximity to the neutrino production target, SBND is exposed to a very high flux of neutrinos and is recording 3 million neutrino interactions every year. The SBND detector completed commissioning and began taking data in the summer of 2024. With its precise tracking and calorimetric capabilities, and powerful light collection system, SBND will provide precise neutrino-argon cross-section measurements and investigate the possible existence of a sterile neutrino in the eV-scale mass range, besides other searches for exotic interactions that may be evidence of new physics. In addition, SBND has the unique characteristic of being slightly offset from the neutrino beamline in such a way that allows sampling of multiple neutrino fluxes using the same detector. This work presents the preliminary results from SBND’s differential inclusive νₑ charged-current analysis on Run 1 data. We will give an overview of the selection, cross-section extraction, and SBND’s electromagnetic shower reconstruction performance through data/MC comparisons.

Speaker: Laura Paulucci (ITA)

8:19 PM Energy dependence of double parton scattering cross-sections for quarkonium and open-charm final states from √s = 7 to 100 TeV

With the increasing center-of-mass energy in collision experiments like the LHC, multi-parton interactions are becoming more important for understanding particle production in these environments. In this work, we investigate how the cross-sections for the associated production of quarkonia and open-charm hadrons scale with center-of-mass energy in proton-proton collisions. We obtain the predictions for the cross-section from LHC Run 1 energies (√s = 7 TeV) to FCC-hh energies (√s = 100 TeV) and compare with known models and available LHC experimental data. Preliminary results indicate that the correlation between the cross-section and the center-of-mass energy is not linear and can vary for different particle channels.

Speaker: Mapse Barroso Ferreira Filho (CBPF - Brazilian Center for Physics Research (BR))

Poster_JpsiD0DPS-ICHEP2026-KevinMota.pdf

8:20 PM Constraining the parameter space of models with two or three SU(2) scalar multiplets using bounded-from-below conditions

We analyze the gauge-orbit space in order to derive bounded-from-below (BFB) constraints for models containing two or three SU(2) scalar multiplets. Within this framework, we construct a coordinate system adapted to the symmetries of the scalar potential by recasting the minimization of its quartic part into a geometric problem, namely the analysis of the corresponding shapes in gauge-orbit space.
First, we study an extension of the Standard Model by an SU(2) scalar quadruplet with hypercharge Y=3/2 or Y=1/2. Using exact analytic relations, we determine the boundaries of the phase spaces of the gauge-invariant terms that appear in the scalar potentials. We then develop practical procedures to obtain necessary and sufficient BFB conditions for these potentials.
Second, we consider the SM extended by three SU(2) scalar doublets and endowed with a symmetry under which each doublet independently changes sign. We argue that, in the absence of known necessary and sufficient BFB conditions, it is more effective to build upon necessary conditions. To this end, we present a Mathematica package that implements this strategy with high accuracy for identifying BFB potentials. Furthermore, we propose a machine-learning approach that rapidly and accurately classifies potentials that are both BFB and compatible with perturbative unitarity.

Speaker: Darius Jurciukonis (Vilnius University (LT))

8:35 PM Meson Mixing Bounds on Z' Mass in the Alignment Limit: Establishing the Phenomenological Viability of the 331 Model

We perform a systematic study of flavor-changing neutral currents (FCNCs) in the 331 model with right-handed neutrinos (331RHNs), analyzing constraints on the Z′ boson mass from K-, D-, Bd-, and Bs-meson oscillations. By explicitly incorporating scalar sector dynamics and quark rotation ambiguities, we demonstrate that Z′ mass limits depend critically on the parametrization of Cabibbo-Kobayashi-Maskawa (CKM) matrix factors. We derive lower bounds as low as 472 GeV for the mass of the exotic Z'.

The work is published here.

Speaker: Patricio Escalona (Universidade Federal da Paraiba)

patricio-escalona-poster.ichep.pdf

8:36 PM Detailed simulation of the LHCb VELO pixel silicon sensors

The LHCb experiment at CERN’s Large Hadron Collider (LHC) is a single-arm forward spectrometer designed for precision heavy-flavour physics. The precise reconstruction of both primary and secondary decay vertices is essential for LHCb physics programme. This capability is provided by the VErtex LOcator (VELO), a crucial subdetector consisting of double-sided silicon hybrid pixel modules operating in a secondary vacuum, in close proximity (~5 mm) to the high-radiation LHC interaction point. The VELO was designed to maintain high charge collection efficiency and spatial resolution under this intense radiation environment, which is expected to reach an integrated fluence of 8×1015  \mev  neq/cm28×1015\mevneq​/cm2 over its expected lifetime.

Modelling the impact of radiation damage in these pixel sensors is crucial to improve the agreement between LHCb Monte Carlo and data. A simulation chain has been designed to model the charge deposition, drift, induced signal, and the resulting cluster map of a 3x3 pixel matrix. The software Technology Computer-Aided Design (TCAD) is used to model the pixel's geometry, doping and electric field profiles at different irradiations. These are then handed over to Garfield++, to simulate the carriers drift and its signal induction. Non-irradiated results are compared with test beam data, which shows significant agreement.

Speaker: Pedro Nogarolli (Federal University of Rio de Janeiro (BR))

Ichep_velo_simulation.pdf

8:37 PM Online monitoring of the LHCb VELO radiation damage

The VErtex LOcator (VELO) is the silicon pixel detector surrounding the interaction region of the LHCb experiment. It operates 5.1 mm from the LHC interaction region, where radiation fluence is large and nonuniform. This exposure leads to spatially dependent performance degradation across its sensors, making continuous monitoring essential to maintain detector performance and data quality.

We present a comprehensive radiation damage strategy, integrating complementary observables into the online monitoring IntelliRTA framework for easy access and availability.
Due to the strong dependence of the leakage current with temperature, we monitor them simultaneously allowing us to relate it directly to the delivered fluence, in which we observe the expected linear relationship.
Bulk damage also affects charge collection efficiency, inducing a decrease in cluster size that serves as a sensitive observable of radiation effects. We see performance recovery with increasing High Voltage.
Furthermore, we analysed the sensor two-dimensional pseudohit efficiency distributions to find a systematic efficiency reduction in the most irradiated regions compared with that of a control region, with this difference increasing over time.
These combined metrics provide an exhaustive map of spatial degradation, guiding the operational decisions necessary to maintain VELO performance through the high luminosity era.

Speaker: Camila Belen Martinez (Federal University of Rio de Janeiro (BR))

online_monitoring_radiation_damage_VELO.pdf

8:38 PM CERN-GIF++: unique facility for testing detectors in a realistic environment for LHC experiments and its upgrades

GIF++ (Gamma Irradiation Facility) is a unique purpose-built infrastructure to test particle detectors under realistic radiation and background conditions expected at the LHC (Large Hadron Collider). It combines a high-intensity 137Cs gamma source (10.5 TBq) with adjustable filters to vary the intensity and a high-energy muon beam (100 GeV/c), allowing simultaneous exposure to controlled radiation fields and particle tracks. This facility enables studies of real-sized detector performance, rate capabilities, electronics testing, and long-term stability, as well as mass-production testing of muon chambers and search for alternative gas mixtures.
For GIF++ Phase-2, an upgrade program was implemented, consolidating the facility for the users. The improvement includes a gas exhaust system upgrade, with a proposal to install a gas-recuperation system, extension of the gas balcony, extension of 137Cs life time, and the main upgrade, bunker extension. Increasing the bunker space allows better distribution of the detectors and limits the shadowing effect on those further away from the source. To prepare the facility for the LS3 (Long Shutdown 3), when the accelerator complex will shut down for more than three years, a cosmic trigger system is being developed, which will be essential to test detectors when there is no muon beam.

Speaker: Katherine Maslova Gioseffi Defante (Universidade do Estado do Rio de Janeiro (BR))

iCHEP_PosterGIF++ (A0).pdf

8:39 PM Test and qualification of the service hybrids of the CMS Phase-II Outer Tracker for HL-LHC

The High-Luminosity LHC (HL-LHC) upgrade represents a major milestone for the LHC experiments. It will deliver an instantaneous luminosity of up to $5–7.5\times10^{34},\mathrm{cm^{-2}s^{-1}}$, greatly extending the physics reach through precision measurements of the Standard Model and searches for new phenomena.

To meet the demanding conditions of HL-LHC operation, CMS will install a new silicon Outer Tracker as part of its Phase-II upgrade. The detector will comprise approximately 13,000 modules of two types, PS (pixel-strip) and 2S (strip-strip). The common two-sensor module concept enables on-detector transverse momentum discrimination by correlating hits at the Level-1 trigger. The outer barrel (TB2S) alone will include 3,296 2S modules.

The INFN Genoa CMS group contributes to this effort through the testing and qualification of the service hybrids for the 2S modules, supporting the construction of the Phase-II Outer Tracker foreseen for installation during the HL-LHC long shutdown (LS3).

Speaker: Miguel Gallo (INFN e Universita Genova (IT))

Poster_ICHEP_2026.pdf

8:40 PM Physics objects validation at the High-Level Trigger reconstruction in CMS

As part of CERN’s Next Generation Triggers (NGT) project, the R³ (Real-time Reconstruction Revolution) program aims to rethink how the High-Level Trigger (HLT) event reconstruction is performed within the CMS Collaboration. A key objective of R³ is to ensure an accurate and robust reconstruction, validating the quality of physics objects measured during data-taking at the upcoming High-Luminosity LHC. This contribution presents our latest efforts to develop robust validation tools for the HLT community in CMS, as new, untested, and heterogeneous algorithms are rapidly developed and deployed. We detail the tools and observables defined and measured for jets, missing transverse energy (MET and MHT), and Particle Flow objects, which are essential for comparing detector configurations across different phase-space regions. We outline the metrics established to validate all objects, including efficiencies, fake rates, responses, and resolutions. Furthermore, we demonstrate how these tools have already improved the reconstruction of certain objects, fostering collaboration with relevant experts. Finally, we highlight the potential for these tools to also benefit the offline reconstruction, given some similarities with the HLT.

Speaker: Bruno Alves (CERN)

PhysicsObjectsValidation.pdf

8:41 PM Gas Flow Optimization for Environmental Robustness in GEM-based Detectors

Detectors based on gas electron multipliers (GEM) are widely used in many high energy experiments due to their high rate capability, good energy resolution and low Ion back flow, but they are also employed in applied physics, such as material analysis via x-ray fluorescence and tomography. In the case of a triple GEM, the detector operates by collecting the charge produced by some incident radiation in the sensitive volume, and multiplying it at each amplification stage, achieving a final gain up to $10^4$. These detectors need to circulate the gas in order to renovate the regions of multiplication and keep a good stability during long acquisition periods. However, certain configurations of gas inlet and outlet can lead to inhomogeneities in gas renewal, resulting in spatial gain instabilities. This project aims to investigate different configurations for gas supply and its impacts on gas renewal. It also studies how other parameters can affect these areas, such as temperature and pressure and possible solutions for optimization of these detectors, regarding the geometry and high voltage system (e.g. temperature and pressure correction), especially for imaging applications.

Speaker: Daniel Neves Fachieri (Universidade de São Paulo)

poster ichep (1) (1).pdf

8:42 PM Building a Repository for Physics Data Preservation

The Czech project Open Science II is building new repositories for the long-term preservation of data from various scientific fields. Our group has established a new repository for data from High Energy Physics, Astroparticle Physics, and related disciplines. The project started in October 2025, and the first datasets were uploaded in 2026. We report on our choices of metadata model, persistent identifiers, and dataset organization. Data from the DELPHI experiment, which concluded in 2000, were the first non-trivial datasets stored in the new repository. We also present our experience with data ingestion, including the upload process, metadata assignment, and validation procedures. Furthermore, we discuss practical aspects of data discovery and access, such as metadata-based selection, user access workflows, and large-scale data download.

Speaker: Jiri Chudoba (Czech Academy of Sciences (CZ))

ichep2026-repo-v2.pdf

8:44 PM Flavor-changing Freeze-In: Dark Matter indicates the scale of flavor violation

We investigate dark matter effective theories and flavor-changing neutral current (FCNC) phenomena to derive model-independent limits on New Physics connecting both phenomena. This is the first direct study of FCNC processes in the context of freeze-in production. Our results suggest a novel pathway to probe feeble interactions between dark matter and Standard Model fermions. Specifically, we leverage the strong suppression of FCNCs in the Standard Model to identify these elusive signals as clear indicators of the dark sector containing dark matter.

Speaker: Jacinto P. Neto (Federal University of Rio Grande do Norte)

Poster-ICHEP-Jacinto.pdf

8:45 PM A search for dark photon at the Brazilian Synchrotron Light Source Laboratory

The dark photon ($A^\prime$) stands as one of the most compelling candidates for physics beyond the Standard Model, acting as a "portal" between visible and dark sectors through kinetic mixing with the photon. While experimental searches are intensifying globally, many regions of the parameter space remain unexplored. In this work, we propose a novel search strategy for dark photons leveraging the high-brightness electron beam of the Brazilian Synchrotron Light Laboratory (LNLS).Our setup utilizes Inverse Compton scattering, $\gamma e^- \rightarrow A^\prime e^-$, where low-energy photons ($\sim 1$ eV) from a laser source collide with the 3 GeV accelerated electron beam at the LNLS. By analyzing the kinematics of "missing energy" events, we determine the projected sensitivity for this proposed experiment. Our results indicate that this setup can probe unexplored regions of the $A^\prime$ parameter space and provide independent verification of astrophysical constraints. This proposal represents a landmark opportunity to establish the first Latin-American Dark Sector detector, positioning the LNLS as a key player in the global hunt for dark matter and its interactions.

Speaker: Ms SILVIA ANGEL (Universidade Federal do Rio Grande do Norte, International Institute of Physics)

BANNER_ICHEP2026_LUCIA_ANGEL.pdf

8:45 PM Application of Machine Learning Algorithms to Simulated Collision Data in High Energy Physics

This work aims at the classification of charmed and strange jets originating from $W^\pm$ boson decays in proton–proton collisions using Boosted Decision Trees (BDT) implemented in TMVA, a toolkit of the CERN ROOT framework. The collision events were generated using the Pythia software, from which data were collected and filtered for jet reconstruction with the FastJet package. The reconstructed jets were labeled as belonging either to a signal class (charmed or strange jets) or to a background class. Two BDT models were then trained, one for charm identification and another for strange identification. Their performance was evaluated on training and testing datasets, yielding purity and efficiency metrics that allow assessment of the classifiers’ quality. Finally, as a validation procedure, the invariant mass spectrum of the $W^\pm$ boson was reconstructed based on the predictions of the trained classification models.

Speaker: Mauro Rogerio Cosentino (Universidade Federal do ABC (BR))

PicholariAndCosentino.pdf

8:45 PM Exploring Neutrino Properties with an Extended Symmetry Model

We are investigating a theoretical model incorporating an additional symmetry to study general neutrino interactions and their properties, including mass generation. Our ongoing work employs simulations and cross-section analyses to explore event distributions sensitive to these interactions. This research aims to deepen the understanding of neutrino properties and their implications for beyond-Standard-Model physics, with potential testability in future experiments, while remaining consistent with cosmological constraints.

Speaker: KIMY JOHANA AGUDELO JARAMILLO (Universidad Catolica del Norte)

Poster_ICHEP_Kimy_ExploringNeutrinoPropierties.pdf

8:46 PM Science and Art in High School Teacher Training: An Interdisciplinary Approach

This work describes an interdisciplinary project developed by students from the "Gleb Wataghin" Physics Institute, the Institute of Arts, and the Institute of Computing at UNICAMP, focused on the professional development of public high school teachers in Campinas, Brazil. The project aims to promote scientific culture by bridging the gap between science and art, viewing them as complementary languages of human creativity essential for interpreting the universe. The methodology involves the creation of audiovisual media projects and collaborative interaction with teachers to inspire innovative pedagogical practices. The initiative highlights the role of science and art as transformative tools for understanding reality and stimulating critical thinking. Preliminary results suggest that this integration enhances academic engagement and provides new conceptual frameworks for the educational environment.

Speakers: Mrs Amanda Schiavon Lisita, Mrs Isabella Galter Ivo (UNICAMP)

8:47 PM From Puzzles to Particles: A European Collaboration on Escape Rooms for Fundamental Physics Engagement

We present a European initiative based on a network of research institutions using scientific escape rooms as innovative tools for science communication. Escape rooms provide immersive, narrative-driven environments where participants solve interconnected puzzles inspired by real scientific concepts, experiencing first-hand the logic and collaborative nature of research.
Within this network, researchers and educators co-develop modular and portable escape room scenarios spanning fundamental physics and related disciplines. These activities are designed as flexible kits, adaptable to different audiences and settings, including schools, universities, and public events, enabling broad deployment across Europe.
A key strength of the initiative is its coordinated, network-based approach. By sharing expertise, designs, and implementation strategies, participating institutions contribute to a common framework that ensures scientific accuracy while allowing local adaptation. This collaboration fosters cross-border exchange and strengthens the role of researchers in public engagement.
By combining the engaging power of escape rooms with a structured European collaboration, this initiative offers a scalable model to bring contemporary physics closer to society and highlight the relevance of fundamental research.

Speaker: Silvio Donato (Universita & INFN Pisa (IT))

ERNEST-Poster_V5.pdf

8:49 PM From High-Energy Physics to the Classroom: A Low-Cost Muon Telescope with Coincidence Logic.

Particle physics education at the high school level faces significant challenges, including high conceptual abstraction and experimental restrictions due to the safety and regulatory constraints on the use of radioactive sources in schools. These factors often hinder effective understanding and limit practical engagement with the subject. To address these barriers, we present the development of a low-cost Muon Telescope, representing an evolution of initial experiments with single-sensor Arduino detectors. Explicitly grounded in the framework of Didactic Transposition as formulated by Yves Chevallard, this project implements a dual-sensor configuration utilizing temporal coincidence logic to safely detect atmospheric muons in school environments. By transitioning from a simple counter to a telescope geometry, the system allows students to filter environmental noise and explore cosmic ray properties, such as flux variation and zenith angle dependence. This approach enables the practice of authentic experimental methods used in high-energy physics within a classroom setting. A preliminary evaluation based on experimental data, combined with a pedagogical analysis, indicates that this approach supports conceptual understanding without oversimplification, effectively maintaining epistemological vigilance. By making subatomic phenomena tangible, the project bridges the gap between formal particle physics and school-level learning, contributing to scientific literacy in secondary education.

Speaker: Sandro Caetano de Oliveira (Universidade Federal do Rio de Janeiro (UFRJ))

Poster_ICHEP_Sandro.pdf

8:59 PM Efficiency Performance of the PoWER Photon Detector proposal for DUNE Phase II with LArSoft

The Deep Underground Neutrino Experiment (DUNE) is a next-generation long-baseline neutrino experiment designed to study neutrino oscillations, mass ordering, and CP violation using large liquid-argon time projection chambers (LArTPCs). This work presents the implementation and performance analysis of the PoWER photon detector system proposed for the Phase II DUNE Far Detector (FD). This system uses a combination of a plastic wavelength shifter and an enhanced reflector to increase the quantity of photons detected. The study focuses on evaluating the efficiency and timing performance of PoWER. An integrated simulation chain is employed, starting with detailed modeling of the PoWER geometry and its inclusion in a reference DUNE detector module of dimensions 1 m × 8 m × 14 m using Geant4. The resulting geometry is exported and incorporated into the LArSoft toolkit for a complete detector description. The detector response is simulated by modeling the readout systems, including electron collection at the anode planes and photon detection by the PoWER modules. Finally, reconstruction and optical analysis are applied to the simulated data to characterize light and charge signals, enabling a direct comparison of PoWER’s photon detection efficiency and response time with conventional photodetection technologies.

Speaker: Thiago Cruz (UTFPR)

Thiago_Poster_final.pdf

8:59 PM Electromagnetic Shower Reconstruction Performance in ICARUS

We present the performance of electromagnetic shower reconstruction in the ICARUS detector using νₑ interactions from the NuMI beam. ICARUS observes neutrino–argon interactions in the few GeV energy range, providing a suitable sample to study shower reconstruction in a liquid argon time projection chamber. We assess the reconstruction quality using purity and completeness metrics, studying their dependence on shower energy and event topology. These results are essential for validating reconstruction algorithms and for supporting νₑ cross-section measurements and oscillation analyses in ICARUS.

Speaker: GABRIELI SALMORIA (CBPF)

Poster_ICHEP.pdf

8:59 PM Global MaPSA Production and Testing for the CMS Phase-II Outer Tracker Upgrade: Status and Readiness for HL-LHC

The High-Luminosity LHC (HL-LHC) upgrade will increase the instantaneous luminosity by up to a factor of five beyond the current LHC design, imposing strict requirements on the CMS tracking system. The Phase-II Outer Tracker will employ novel silicon Pixel-Strip (PS) modules capable of performing transverse momentum discrimination for the Level-1 trigger. A key component of the PS module is the Macro-Pixel Sub-Assembly (MaPSA), which integrates a pixelated silicon sensor with dedicated readout ASICs.
A distributed network of CMS institutes worldwide carries out the production and quality assurance of MaPSAs. A common testing framework has been established to ensure uniform electrical characterisation, threshold tuning, and noise evaluation, among other assessments across all production sites. Continuous optimisation of assembly and testing procedures has led to significant improvements in yield and process stability.
This contribution presents an overview of the global MaPSA production effort, including testing methodologies, quality control metrics, yield evolution, and current production status.

Speaker: Leticia Braga Da Rosa (Deutsches Elektronen-Synchrotron (DE))

8:59 PM Run 3 E/gamma trigger performance

A number of flagship analyses in the ATLAS experiment rely on electron and photon triggers to efficiently record events of interest. During Run 3, these triggers have undergone significant developments, including the integration of advanced machine learning techniques, to achieve high efficiency while controlling background rates and operating within the constraints of the trigger hardware. This contribution presents the design, optimisation, deployment, and validation of the ATLAS Run 3 electron and photon triggers, and discusses their impact on key physics analyses.

Speaker: Edmar Egidio Purcino De Souza (UFBA)

ICHEP_Poster_ATLAS_egTRIGGER_Edmar-2.pdf

Sat, August 1

8:00 AM → 8:30 AM Registration: Day 3

8:30 AM → 10:15 AM Neutrino Physics

Conveners: Dr Joel Jones-Perez, Shirley Li (UC Irvine)

8:30 AM Results from the stage one of the DANSS experiment

The DANSS reactor antineutrino spectrometer is located in close proximity to the power reactor of the Kalininskaya NPP (Russia). A lifting platform allows the detector position to be changed in the range of 11–13 m from the reactor core. More than 10 M neutrino events and the long-term experiment operation, covering 5 complete fuel campaigns, provide DANSS with rich experimental data, which is used for both fundamental and applied studies. Our results include:
• the most stringent limit for sterile neutrinos at $Δm^2∼1$ eV$^2$;
• new limits for Large Extra Dimensions;
• a precise measurement of the $^{235}$U to $^{239}$Pu neutrino yield ratio;
• the first precise monitoring of an industrial reactor’s power and fission fractions;
• a high energy tail of the reactor antineutrino spectrum.
DANSS has been stopped for a major upgrade with the main aim to dramatically improve the energy resolution. New scintillation detectors will feature 8 WLS fibers (YS-2 by Kuraray) with double-side SiPM readout. The average light yield of the new detectors is 200 ph.c. per MeV. The upgraded detector will also have a 70 % larger fiducial volume, providing a counting rate of about 10 k neutrino events per day at the closest position.

Speaker: Dr Igor Alekseev (NRC "Kurchatov Institute" & P.N. Lebedev Physical Institute RAS)

DANSS4ICHEP_alekseev_v2.pdf

8:45 AM One Detector, Two Beams: MicroBooNE's Search for eV-scale Sterile neutrinos

The existence of three neutrino flavors, with oscillations between them, has been established over the past decades. However, anomalies observed in LSND, MiniBooNE, and gallium experiments have motivated the hypothesis of an additional sterile neutrino that doesn't interact directly with matter yet oscillates with the known flavors (the "3+1 model"). MicroBooNE was constructed, in part, to provide a definitive test of these anomalies. MicroBooNE is an 85-tonne active mass liquid argon time projection chamber (LArTPC) detector at Fermilab that can distinguish between photon and electron electromagnetic showers and select charged-current electron and muon neutrino events with exceptional performance. This capability has enabled MicroBooNE to thoroughly test electron-like explanations for the MiniBooNE anomaly across multiple analyses. In this talk, I will present the latest results from MicroBooNE's search for an eV-scale sterile neutrino in the 3+1 model. This analysis uniquely combines data from two neutrino beams, the on-axis BNB and off-axis NuMI beams, in a single detector. This dual-beam approach breaks degeneracies between electron-neutrino appearance and disappearance, extending our 95% confidence-level exclusion to most of the parameter space allowed by LSND, MiniBooNE, and gallium experiments. We find no evidence for sterile neutrino oscillations and establish world-leading constraints on the 3+1 model.

Speaker: Xiangpan Ji

MicroBooNE_XJI.pdf

9:00 AM The Search for Anomalous Single-Photons and Electron-Positron Pairs in MicroBooNE

MicroBooNE is an 85-tonne active volume liquid argon time projection chamber (LArTPC) neutrino detector in the Fermilab Booster Neutrino Beam, designed in part to investigate an anomalous excess of single electromagnetic shower events observed by the MiniBooNE experiment that remains unexplained. By leveraging the LArTPC technology's unique ability to distinguish photon from electron electromagnetic showers, MicroBooNE has achieved the world's most sensitive search for neutrino-induced single-photon production. With recent MicroBooNE results strongly disfavoring the long-preferred electron-origin hypothesis, photon explanations remain one of the last places the MiniBooNE anomaly can hide. In this talk, I will present recently published results from a comprehensive program of single-photon searches, including an expanded search for neutral-current (NC) delta radiative decays, a model-independent inclusive approach, and a targeted search for NC coherent-like single-photon production. Additionally, I will report on a novel dark sector search that sets the world's first direct limits on dark neutrino models, which have recently gained traction as viable solutions to the MiniBooNE anomaly.

Speaker: Diego Andrade (Illinois Institute of Technology)

ICHEP-2026_uBooNE_SinglePhoton_epem_searches_Diego_Andrade_v3.pdf

9:15 AM Direct neutrino-mass measurement and sterile-neutrino search based on 259 days of KATRIN data

The Karlsruhe Tritium Neutrino (KATRIN) experiment probes the effective electron anti-neutrino mass by precisely measuring the tritium beta-decay spectrum close to its kinematic endpoint. A world-leading upper limit of $0.45\,\mathrm{eV/c}^2$ ($90\%$ C.L.) has been set with the first five measurement campaigns.
The same data can be used to search for sterile neutrinos with masses on the eV scale. The results exclude large parts of anomalies observed in short-baseline oscillation experiments.
This talk features the latest KATRIN neutrino mass and sterile neutrino results. Additionally, an overview of the next KATRIN measurement phase with an updated detector, allowing to search for sterile neutrinos on the keV scale, is given.

Speaker: Xaver Stribl (TUM)

katrin_results_stribl_ichep26.pdf

9:30 AM Searching for keV-scale sterile neutrinos with the KATRIN experiment

The KATRIN (Karlsruhe Tritium Neutrino) experiment is designed to measure the effective neutrino mass using tritium beta decay. KATRIN has set the world's best limit on the neutrino mass ($m_\beta < 0.45,\mathrm{eV}$ at 90% CL) from the combined analysis of the first five measurement campaigns. Using the same dataset, KATRIN also published new constraints on eV-scale sterile neutrinos, covering a mass-squared range from a few $\mathrm{eV}^2$ to several hundred $\mathrm{eV}^2$, excluding mixing angles above a few percent.

With an endpoint of $18.6,\mathrm{keV}$, tritium enables searches for sterile neutrinos at the keV mass scale by measuring the full $\beta$ spectrum. However, the current KATRIN detector is not designed to handle the substantially higher count rates over this wide energy range. To address this, a faster detector, TRISTAN, will be installed in the KATRIN beamline, to search for keV-scale sterile neutrinos across the full $\beta$ spectrum with sensitivity to active-sterile mixing down to $10^{-6}$. TRISTAN, a multi-pixel detector based on silicon drift detector technology, is currently in production, with installation in the KATRIN beamline planned for 2026.

In this contribution, I will discuss recent progress in the TRISTAN detector development and the methods being implemented to analyze the full tritium $\beta$ spectrum

Speaker: Giulio Gagliardi (University of Milano-Bicocca)

ichep_2026_Gagliardi.pdf

9:45 AM First Results from the Search for Muon-Neutrino Disappearance with the ICARUS Detector

After successful operation at LNGS and a major upgrade at CERN, the 760-ton ICARUS T600 detector has been running at Fermilab since 2020, collecting neutrino interactions from the BNB and NuMI beams. In late 2025, ICARUS reached five years of continuous data taking, demonstrating the maturity of large-scale LAr-TPC technology and its relevance for future experiments such as DUNE.

This contribution presents the first ICARUS search for muon-neutrino disappearance in the BNB. Charged-current 1$\mu$Np events selected from 2022–2023 data are compared to simulations and interpreted, for the first time, within a two-neutrino approximation of the 3+1 sterile-neutrino model, including systematic uncertainties from flux, interaction, and detector effects.

Although currently limited by systematic uncertainties, this first oscillation analysis probes the parameter space suggested by existing $\nu_\mu$ disappearance results and lays the groundwork for future SBN combined analyses with SBND, which will significantly improve sensitivity to sterile-neutrino scenarios.

Speakers: Andre Fabiano Steklain Lisboa (The Federal University of Technology - Parana (BR)), Dr Andre Fabiano Steklain Lisboa

ICHEP2026IcarusSteklain.pdf

10:00 AM Modernization of the DANSS experiment

DANSS experiment is a long-term operating facility providing continuous data taking at short distances from an industrial nuclear reactor and represents a unique experimental platform for reactor antineutrino studies and the development of applied neutrino monitoring methods.
A key element of the further development of the experiment is the DANSS modernization program, aimed at increasing sensitivity, enhancing the accumulated statistics, and reducing the dominant systematic uncertainties. The program includes the modernization of detector elements and the light collection system, as well as further development of calibration, stability monitoring, and event selection methods. The modernization program is based on the results of many years of detector operation and is aimed at improving the detector performance with a complete replacement of the sensitive detector volume.
As a result of the modernization, an improvement of the detector energy resolution from the current ~34% to a level of ~12% at 1 MeV is expected, along with an increase in the effective statistics of registered antineutrino events by 40–50%. The expected improvements will lead to the significant increase in the sensitivity of the experiment to reactor antineutrino oscillation parameters into sterile states as well as in applied tasks of nuclear reactor neutrino monitoring.

Speaker: Dr Igor Alekseev (Kurchatov Complex for Theoretical and Experimental Physics)

DANSSupgrade4ICHEP.pdf

8:30 AM → 10:15 AM Electroweak and Top Quark Physics

Conveners: Miguel Ramos Pernas (CERN), Matteo Defranchis (CERN)

8:30 AM Probe of diboson polarization states in ATLAS

Measurement of polarization states in diboson production offers an important, new avenue to probe the inner structure of electroweak interactions, and in particular gain sensitivity to study electroweak symmetry breaking and goldstone boson equivalence theorem. This talk will present the recent attempts in ATLAS to observe different diboson polarisation states in ATLAS and discuss the physics impact and prospects.

Speaker: Olivier Arnaez (Centre National de la Recherche Scientifique (FR))

OArnaez_ICHEP26_DibosonPolarizationATLAS.pdf

8:45 AM W boson production and decay properties in the forward region with LHCb

Measurements of W bosons at LHCb exploit the experiment’s forward acceptance to probe the electroweak interaction in a phase space complementary to that of the central LHC detectors. The large data samples collected in proton–proton collisions at 13 TeV enable detailed studies of both the production and decay characteristics of the W boson in a previously unexplored rapidity region. Observables related to production properties provide sensitivity to the underlying partonic structure of the proton and to higher-order electroweak and QCD dynamics, while measurements of decay properties allow stringent tests of the universality and structure of the charged-current interaction. These analyses benefit from LHCb’s precise tracking, vertexing, and particle identification, together with dedicated control of experimental and theoretical systematics. This contribution presents recent results on W boson physics at LHCb, discusses their interpretation within the Standard Model, and highlights their impact on global electroweak constraints and searches for possible signs of new phenomena.

Speaker: Menglin Xu (CERN)

W boson.pdf

9:00 AM Rare vector boson decays at CMS

An overview of the rare vector boson decays is presented using Run 2 and Run 3 data collected by the CMS experiment.

Speaker: Dennis Roy (Kansas State University (US))

RareVectorBosonDecaysAtCMS.pdf

9:15 AM A precision measurement of the W and Z boson production at CMS

This talk presents the latest precision measurements of the W and Z boson production using data collected by the CMS experiment. New results include the measurements of production angular coefficients. These results are among the most precise carried out at hadron colliders, and are fundamental to characterize the production and decay cross section of weak vector bosons at the LHC.

Speaker: Vladislav Shalaev (Joint Institute for Nuclear Research (RU))

W and Z_ICHEP2026.pdf

9:30 AM Measurement of Spin and Quantum Correlations in $Z \to \tau^+ \tau^-$ Decays at LEP with DELPHI

Precision studies of $τ⁺τ⁻$ production at the Z pole provide a clean environment for investigating electroweak spin correlations and quantum information observables. Using archived LEP-1 data collected by the DELPHI experiment, the process $e⁺e⁻ → Z → τ⁺τ⁻$ is well measured, but the presence of multiple neutrinos in $τ$ decays limits reconstruction of the $τ$-pair rest frame. This constrains the precision of spin-dependent measurements.

We present a machine-learning reconstruction method based on an event-level foundation model that predicts neutrino momenta using detector-level observables and kinematic constraints. The reconstructed $τ⁺τ⁻$ rest frame improves the resolution of spin-sensitive observables and enables a measurement of the $Z → τ⁺τ⁻$ spin density matrix. These results provide a basis for quantum correlation studies using archived $e⁺e⁻$ collider data and demonstrate the applicability of machine-learning–based multi-neutrino reconstruction in precision electroweak analyses.

Speaker: Cen Mo (Shanghai Jiao Tong University (CN))

20260801 ICHEP.pdf

9:45 AM Precision multiphoton MC KKMCee for lepton and quark pair production at lepton colliders: Update

We present an overview and update for the {\tt KKMCee 5.00.2} Monte Carlo event generator for lepton and quark pair production in high-energy electron-positron annihilation processes. We note that it is still the most sophisticated event generator for such processes. Its entire source code is rewritten in the modern C++ language and it reproduces all features of the older KKMC code in Fortran 77. We discuss improvements both in the MC algorithm and in its various interfaces, such as those to parton showers and detector simulation.

Speaker: Bennie Ward (Baylor University (US))

ICHEP2026kkmcee.pdf

8:30 AM → 10:15 AM Higgs Physics

Convener: Chen Zhou (Peking University (CN))

8:30 AM Precision Higgs physics at FCC-hh

The FCC-hh, operating at a centre-of-mass energy of 84 TeV, will produce unprecedentedly large samples of single and double Higgs bosons, enabling detailed studies of rare decays (H→μμ, H→γγ, and H→Zγ) and the Higgs self-coupling, with expected precision at the few-percent level. It will also significantly enhance sensitivity to invisible decays, reaching branching fractions as low as $10^{-4}$ and probe the top Yukawa interaction with unprecedented precision via the ttH production mechanism. We will review these measurements that will provide complementary information to FCC-ee and test the Higgs sector to unprecedented accuracy.

Speaker: Elena Mazzeo (CERN)

260801_HiggsAtFCChh_ICHEP.pdf

8:45 AM Measurements of the Higgs boson mass and width at CMS

An important aspect of the Higgs boson physics programme at the LHC is to determine all the properties of this particle, including its mass, which is a free parameter in the SM, and its width. This presentation will discuss the latest developments in measurements of the Higgs boson mass and width, with data collected by the CMS experiment at a centre of mass energy of 13 TeV.

Speaker: Paul Gaigne (Université Paris-Saclay (FR))

ICHEP_Higgs_mass_width_Gaigne_v3.pdf

9:00 AM Constraints on Higgs-charm couplings

The discovery of the Higgs boson ten years ago and successful measurement of the Higgs boson couplings to third generation fermions by ATLAS and CMS mark great milestones for HEP. The much weaker coupling to the second generation quarks predicted by the SM makes the measurement of the Higgs-charm coupling much more challenging. With the run3 data collected by the CMS experiment, a lot of progress has been made to constrain this coupling. In this talk, we present the latest results of direct and indirect measurements of the HIggs-charm coupling by the CMS experiment. Prospects for future improvements are also given.

Speaker: Fabio Monti (CERN)

v2_FabioMonti_HiggsCharm_ICHEP26_July2026-4.pdf

9:15 AM Combined measurements of Higgs boson production cross-sections and decay branching ratios with the ATLAS experiment

Combination of measurements from different Higgs boson productions and decays will maximize the statistical power, and also allow decoupling the production from decay. This talk presents the latest combined measurements of the Higgs boson production cross-sections and decay branching ratios by the ATLAS experiment based on LHC Run 2 data, including Simplified Template Cross Sections (STXS) results and coupling modifier (kappa) tests. The combined measurements are interpreted using the effective field theory framework to probe new physics.

Speaker: Karsten Koeneke (Georg August Universitaet Goettingen (DE))

2026-08-01 ICHEP ATLAS Higgs Combination - Köneke.pdf

9:30 AM Measurement of Higgs boson coupling properties in vector boson decay channels in ATLAS

Higgs boson decays to vector-boson pairs typically provide the most precise measurements of Higgs boson properties. In this talk, we will present the most recent measurements of Higgs boson production cross-sections (including Simplified Template Cross-Sections) in the bosonic decay channels.

Speaker: Theo Maurin (University of Glasgow (GB))

HVV_ICHEP2026.pdf

9:45 AM Measurements of fiducial and differential cross-sections of Higgs boson production with the ATLAS experiment

The fiducial and differential cross-section measurements are least model dependent. They are important inputs to the theory community for comparison with the state-of-art calculations. Various interpretations of the measurements will also shed light upon the validity of SM and new physics. This talk presents the recent Higgs boson fiducial and differential cross section measurements by the ATLAS experiment, including interpretations of these results in the context of Standard Model effective field theories.

Speaker: Liza Mijovic (University of Edinburgh)

Mijovic_Hdiff_ICHEP2026.pdf

10:00 AM Higgs physics at the Muon Collider with a detailed detector simulation

This contribution explores the physics potential of a future muon collider operating at a center-of-mass energy of √s = 10 TeV for precision studies in the Higgs sector. Using a detailed detector simulation that incorporates the dominant sources of machine-induced background, the expected sensitivity to key Higgs processes is evaluated. These include measurements of the production cross sections for single Higgs production via vector boson fusion and double-Higgs production.
A central focus of the study is the determination of the Higgs boson trilinear self-coupling, a fundamental parameter for probing the structure of the Higgs potential and the nature of electroweak symmetry breaking. The analysis is performed within the framework of the MUSIC (MUon System for Interesting Collisions) detector concept, specifically optimized for the challenging muon collider environment, and assumes an integrated luminosity of 10 ab⁻¹ collected over five years of operation. The results highlight the exceptional potential of a multi-TeV muon collider to explore the Higgs sector with a level of precision unmatched by any other proposed future collider within a comparable timeframe.

Speaker: Luca Castelli

higgs_ichep_v2.pdf

8:30 AM → 10:15 AM Software, Computing and Data Handling

Conveners: Carla Marin Benito (University of Barcelona (ES)), Enrico Bothmann (CERN), Prof. Jianming Bian (University of California Irvine (US)), Kevin Pedro (Fermi National Accelerator Lab. (US)), Marco Giacalone (CERN), Phat Srimanobhas (Chulalongkorn University (TH)), Thiago Tomei Fernandez (UNESP - Universidade Estadual Paulista (BR))

8:30 AM The ALICE asynchronous software trigger processing for LHC Run 3

In LHC Run 3, ALICE is reading out 600 times more proton–proton collisions than in Run 2, generating a data stream exceeding 30 GB/s—the largest among LHC experiments. This leap is enabled by major upgrades to both the detector systems and data processing infrastructure.

The full stream is continuously compressed, written to disk, and processed through calibration and reconstruction pipelines. A flexible asynchronous software trigger selects events for analysis, enabling highly efficient data reduction.

In 2024 and 2025, ALICE collected over 100 pb⁻¹ of data, retaining just 17 PB from about 400 PB of raw input. Remarkably, the full trigger chain, including final physics reconstruction, is completed within few weeks from the data taking, making datasets promptly available for analysis and allowing numerous physics results to be presented at conferences shortly after the collection of the data.

This talk will highlight ALICE’s upgraded processing chain, focusing on the asynchronous software trigger, and demonstrate how these innovations maximize physics output in Runs 3.

Speaker: Sara Pucillo (Universita e INFN, Salerno (IT))

ICHEP_trigger_Pucillo_final.pdf

8:45 AM The CMS Level-1 Data Scouting system for HL-LHC and its Physics Potential

The CMS upgrades for the upcoming High-Luminosity LHC (HL-LHC) run include vast improvements to the quality of the L1 Trigger event reconstruction, notably by the inclusion of reconstructed tracks. To fully exploit its extended L1 capability, CMS is pioneering a novel L1 Data Scouting (L1DS) system, designed to acquire and process the quasi-offline-quality trigger primitives produced by the L1 at the accelerator bunch-crossing rate of 40 MHz. The goal of this system is to give full access to potential physics signatures otherwise limited by the L1 latency and accept rate budget, or whose selection strategy diverges from that of the standard CMS physics program. To validate the concept and provide a development platform for the firmware and software required for the final system, a scaled-down demonstrator, implementing the full acquisition and processing chain, was assembled. The feasibility and reach of a number of physics channels are being studied in detail by injecting simulated data into the demonstrator full chain. We present an overview of the baseline L1 scouting design and its possible extensions, as well as a summary of ongoing physics studies and their potential to extend the CMS physics reach at the HL-LHC.

Speaker: Yuta Takahashi (University of Zurich (CH) / University of Florida (US))

Yuta_ICHEP_L1Scouting_20260801.pdf

9:00 AM Demonstrating Real-Time Reconstruction and Calibration in the High-Level Trigger for the Next Generation Triggers Project in the CMS Experiment

The Real-time Reconstruction Revolution (R3) initiative for the High-Level Trigger (HLT) of the Next Generation Triggers (NGT) project in CMS aims to process all collisions accepted by the Level-1 hardware-based trigger (L1T), in preparation for the Phase-2 upgrade of the HL-LHC and beyond. Central to this effort is the expansion of the HLT data-scouting strategy, in which events are reconstructed and stored in a compact, storage-efficient, and analysis-ready format. This necessitates an in situ processing loop to derive high-quality calibration constants during data taking, as offline reprocessing is not possible. A demonstrator system has been developed within the R3 initiative to prove the feasibility of this approach. It comprises dedicated processing nodes integrated into the current data-acquisition (DAQ) infrastructure and deployed during the ongoing LHC Run 3. Approximately 1% of the incoming RAW data is buffered on SSDs for up to 8 hours, enabling a novel calibration loop to derive enhanced calibration constants that are injected into improved HLT reconstruction algorithms for data reprocessing.

Speaker: Dr Mateusz Zarucki (CERN)

Demonstrating Real-Time Reconstruction and Calibration in the HLT for the NGT Project in CMS

9:15 AM Data squeezing in CMS: techniques and physics results

Data bandwidth and storage limitations are a major bottleneck for many physics measurements and searches in high-energy physics. The CMS experiment is addressing these constraints using a range of techniques that increase the number of recorded events by exploiting lightweight data formats designed to preserve physics performance. These approaches continue to evolve and will be further developed for Phase-2.

This talk presents an overview of the compression techniques currently employed in CMS, with a focus on data scouting (reduced-content, trigger-level formats) and RAW Prime, in which reconstructed clusters replace raw data packets from the silicon strip tracker. Their impact on physics analyses will be discussed. We summarise how these methods enable lower kinematic thresholds for high-rate triggers, particularly relevant for low-mass physics and soft-object signatures, while maintaining manageable dataset sizes. Finally, we outline ongoing developments for Run 3 and the HL-LHC.

Speaker: Silvio Donato (Universita & INFN Pisa (IT))

Donato_Data_squeezing_in_CMS_ techniques_and_physics_results_ICHEP2026.pdf

9:30 AM Evolving the CMS software into a fully distributed application for the CMS High Level Trigger

The CMS experiment relies on a complex software ecosystem for detector simulation, event reconstruction, and physics analysis. As data rates and detector complexity continue to rise, scaling this software efficiently across distributed resources has become essential. We present the extension of the CMS Software (CMSSW) into a fully distributed application, enabling a single logical workflow to span multiple processes running on one or more machines. This approach leverages MPI to efficiently exploit shared memory and high-speed interconnects - like InfiniBand and RoCE - with minimal changes to the existing CMSSW code. Data movement to and from GPU memory leverages RDMA, enabling these transfers to bypass the host CPU entirely when supported by the underlying hardware. The distributed execution model is implemented through a small set of lightweight CMSSW modules responsible for MPI setup, event data transfers, and tracking the application’s logical state. The latter is critical for the High Level Trigger (HLT), where real-time performance depends on the early rejection of events failing selection criteria. We demonstrate this distributed model on an HLT test stand running alongside the production system during the 2026 data-taking period, and compare its usability and performance with current HLT nodes and previous benchmarks.

Speaker: Anna Polova (UNESP - Universidade Estadual Paulista (BR))

ICHEP presentation (4).pdf

9:45 AM Multi-track vertex reconstruction in GPUs for the first High Level Trigger at LHCb

The LHCb detector relies on a fully software-based trigger system to process pp collisions at 30 MHz. This has been possible due to the development of Allen, a GPU implementation of the first HLT deployed on approximately 500 GPU cards, reducing the input data rate from about 2 TB/s to 150 GB/s by exploiting parallelism in intensive algorithms such as particle tracking and primary-vertex reconstruction. It also provides sufficient headroom to incorporate novel reconstruction techniques. One such development is the reconstruction of high-multiplicity secondary vertices, enhancing the selection of particles decaying into many final-state products. These signatures are relevant for detector material mapping and for precision measurements with complex decay topologies, either in SM analysis or in searches for NP. This contribution presents the design and implementation of a GPU-optimized multi-track vertex reconstruction algorithm capable of operating at the full 30 MHz collision rate during Run III. Its performance is evaluated using Monte Carlo simulation, with particular emphasis on reconstruction efficiency, vertex resolution, and throughput impact. We demonstrate the feasibility of performing multi-body vertex reconstruction at the first trigger level in LHCb and establish the foundations for a robust and high-throughput implementation in preparation for Run IV data-taking conditions.

Speaker: Diego Mendoza Granada (Laboratoire de Physique Nucleaire et des Hautes Energies (LPNHE) - CNRS)

MultiBodyVertexing_ICHEP.pdf

10:00 AM The development of CEPCSW for the CEPC Reference Detector

The Circular Electron--Positron Collider (CEPC) requires a robust, scalable, and maintainable software ecosystem to support detector design, simulation, reconstruction, and physics analysis for a next-generation Higgs factory. CEPC Software (CEPCSW) is integrated with the Key4hep/EDM4hep ecosystem and builds on widely used HEP software, including the Gaudi event-processing framework, DD4hep for detector description, Geant4 for detector simulation, and ROOT for data analysis.

This contribution reports the current status and recent progress of the CEPC core software, emphasizing its architecture, key components, and development workflow. The framework combines modern C++ and Python toolchains with a modular reconstruction chain and a unified geometry and conditions data model for long-term stability and reproducibility. We describe the continuous-integration and validation strategy, the versioned release process, and an automated performance-validation system that uses Kafka to orchestrate and execute validation steps. We also summarize recent developments, including simulation with the Gausinno framework, Diffusion Transformer (DiT)-based fast-simulation interfaces, reconstruction performance optimizations, and expanded analysis toolkits.

These developments provide the technical foundation for completing the Reference Detector TDR and outline a roadmap toward future data taking.

Speaker: Tao Lin (Chinese Academy of Sciences (CN))

lintao-202607-ICHEP-CEPCSW.pdf

lintao-202607-ICHEP-CEPCSW.pptx

8:30 AM → 10:15 AM Accelerator: Physics, Performance, and R&D for Future Facilities

Convener: Yukiyoshi Ohnishi

8:45 AM Accelerator Conceptual Design and R&D Efforts for Super Tau-Charm Facility

Super Tau-Charm Facility (STCF) is a major high-energy project under study in China. It is a third-generation circular electron-positron collider in the CoM energy range of 2-7 GeV and with an optimal luminosity greater than 51034 cm-2s-1, aiming to explore charm physics and tau physics in the next decades. The STCF team completed the conceptual design report of the accelerator and made it reviewed by an international committee in June 2025. The accelerator consists of an injector and two collider rings. The injector that is a combination of four different linac sections, a positron source, a positron damping ring, and transport lines, will provide full-energy electron and positron beams for top-up injections in the collider rings in the whole energy range. The collider rings are designed to have an extremely low beta* (<=1 mm), a large Piwinski angle (>10) and a high beam current (~2 A) with the Crab-Waist collision scheme. Several identified technical challenges have been undergone R&D efforts. This presentation will introduce the conceptual design of the accelerator and as well the R&D progress. STCF is applying for the formal approval from the Chinese central government, planing to start the construction in the 15th five-year plan (2026-2030).

Speaker: Ye Zou

ICHEP26-STCF Project-YeZou.pdf

9:00 AM 3D Injection Design towards Higher Sensitivity in the J-PARC Muon g-2/EDM Experiment

The J-PARC muon g-2/EDM experiment aims to measure the muon anomalous magnetic moment with O(100) ppb precision and to improve the sensitivity to the muon electric dipole moment, using the “zero E-field” approach in a compact, highly uniform solenoidal storage ring. Achieving the required stored-muon population motivates a dedicated three-dimensional (3D) injection concept that guides the incoming relativistic muon beam onto the storage plane with a pulsed magnetic field. To further enhance g-2 sensitivity, an upgrade scenario with a twofold increase in magnetic field and beam energy is under study, introducing additional constraints and challenges for 3D injection. In this contribution, we report our 3D-injection studies for this higher-sensitivity configuration, emphasizing the main factors that limit injection efficiency: strong transverse coupling, tight acceptance at the injection point, and pulsed-kicker field design. We present an optimization campaign and discuss design choices and parameter ranges that improve injection efficiency in the upgraded scenario.

Speaker: Zejia Lu (Shanghai Jiao Tong University (CN))

Zejia_Lu_ICHEP2026.pdf

9:15 AM Recent Progress and luminosity challenges at the SuperKEKB Collider

SuperKEKB is an electron—positron collider that employs the nano-beam scheme together with the crab-waist scheme to achieve the world’s highest luminosity for the production of B-meson pairs. SuperKEKB accomplished a peak luminosity of 5.1e34 cm^-2s^-1 in 2024. However, as a luminosity-frontier machine, SuperKEKB has faced several challenges, including an extremely short beam lifetime due to a small dynamic aperture, impedance effects, beam-beam blow-up, and unexpected, rapid, significant beam losses known as Sudden Beam Loss (SBL). In particular, the mechanism of Sudden Beam Loss has been largely clarified following the first long shutdown (LS1), which ran from July 2022 to January 2024. Recent progress in beam commissioning during 2025 — 2026 will be presented, and the remaining problems and issues to be addressed for future improvements in luminosity performance will be discussed.

Speaker: Gaku Mitsuka (KEK)

ICHEP2026_Mitsuka_20260801.pdf

9:30 AM Progress in the beam energy calibration and polarization at FCC-ee

The Future Circular electron-positron Collider, FCC-ee, is designed for unprecedented precision for particle physics experiments from the Z pole to above the top parir threshold. This demands a precise knowledge of the center-of-mass energy (ECM) and collision boosts at all four interaction points and all operation energies. Determining the average beam energies is foreseen using resonant depolarization, with a precision better than 100 keV. This demands transversely polarized non-colliding pilot bunches. While wigglers are foreseen to improve the polarization time, misalignment and field errors can limit the achievable polarization level, and might alter the relationship between the resonant depolarization frequency and the beam energies. Strong synchrotron radiation losses from 40 MeV per turn at the Z pole and up to 10 GeV per turn at the highest beam energy of 182.5 GeV lead to different ECM and boosts for each interaction point and the beamstrahlung enhances this asymmetry further. Other sources of energy shifts stem from collision offsets and should be controlled. The latest results of FCC-ee energy calibration and polarization will be presented here.

Speaker: Juba TAMAZIRT

confIchep.pdf

confIchep.pptx

9:45 AM Status and Perspectives for FCC-ee Detector Background Studies

The electron-positron Future Circular Collider (FCC-ee) is a proposed high-energy lepton collider that aims to reach unprecedented precision in the measurements of fundamental particles. The high beam currents, with a top-up continous injection, and the high interaction frequency produce machine induced backgrounds in the detector, especially at the Z peak energy. This contribution presents a study of the beam-induced backgrounds at FCC-ee. Two main categories of backgrounds are considered reaching the detector: the single-beam related, such as synchrotron radiation and beam gas, in which photons or electrons survive the collimation and absorber system, and the luminosity backgrounds, originating at the collision point, like the incoherent pair creation or the radiative Bhabha, with high cross-sections. In addition, to allow for high beam intensity the beam is continuously injected, potentially leading to induce backgrounds in the detector, thus giving feedback on the best injection schemes. The beam induced backgrounds are simulated with GuineaPig++, BDSIM and X-Suite and are interfaced to the turnkey software Key4HEP to estimate the occupancy levels in the detector.

Speaker: Giulia Nigrelli (Sapienza Universita, INFN-LNF, CERN)

FCC_ee_detectorbkg_GN.pdf

8:30 AM → 10:15 AM Sustainability

Conveners: Veronique Boisvert (Royal Holloway, University of London), Alberto Pace (CERN), Ruth Pottgen (Lund University (SE)), Heinrich Schindler (CERN), Dr Maksym Titov (IRFU, CEA Saclay, Université Paris-Saclay (FR)), Sandro Fonseca (Universidade do Estado do Rio de Janeiro (BR))

8:30 AM Gamma Factory — a sustainable project for CERN

One of the goals of the Gamma Factory (GF) project is to produce high-intensity gamma-ray beams of tunable energy and relatively small energy spread. Such beams can be optimized to generate an intense photo-neutron source, capable of driving an advanced nuclear energy system (ANES) for nuclear waste transmutation. GF-driven ANES could supply the requisite electrical power that is necessary for the operation of the Large Hadron Collider storage ring. In this talk, we shall present the feasibility studies of the Gamma Factory beam-driven ANES. Our comparative studies show that although the neutron production efficiency of the GF gamma-ray beam per MW of the beam power is approximately 14 times lower than that of the  500 MeV proton beam, the overall net ANES power production efficiency for the GF beam driver scheme could be comparable to that of the proton beam driver scheme, while providing additional transmutation capacity, not available for the proton beam driven scheme. The full GF research programme can be executed, if necessary, as a fully sustainable project.

Speaker: Mieczyslaw Witold Krasny (LPNHE, Sorbonne University, Paris, Centre National de la Recherche Scientifique (FR) and CERN)

GF_Krasny_Natal_2026 _sustainability.pdf

8:45 AM Eco-friendly gas mixtures for RPCs: performance and ageing results from long term study at CERN GIF++

Gaseous detectors play a crucial role in high energy physics experiments, yet their operation often relies on fluorinated gases with a very high Global Warming Potential (GWP). Resistive Plate Chambers (RPCs) operated in avalanche mode typically use high performance gas mixtures based on high-GWP F-gases such as C₂H₂F₄ and SF₆.
As environmental concerns grow and regulations become increasingly stringent, the development of sustainable gas mixtures has become a global priority.

Within the RPC ECOGas@GIF++ Collaboration, a long term R&D program has investigated eco friendly gas mixtures for RPCs and assessed their performance under irradiation. RPCs operated with an HFO-1234ze/CO₂ mixture were exposed to high particle fluxes at CERN GIF++, accumulating O(10² mC/cm²) over three years. This ageing campaign is now complete, and the detectors’ performance has been systematically evaluated across a broad range of rates.

This talk will present preliminary final results from the campaign, along with future perspectives.

Speaker: Gabriella Pugliese (Universita e INFN, Bari (IT))

Pugliese_ICHEP2026.pdf

Pugliese_ICHEP2026.pptx

9:00 AM Collective decarbonization of research in France : what can we learn from the scientific results of the research group "Labos 1point5"

The "Labos 1point5" research group has started five years ago, focusing on two key areas: (i) analysing the carbon footprint of research in terms of greenhouse gas (GHG) emissions and (ii) analysing the pratical transition in laboratories, supporting the implementation of emission reduction trajectories at their level for the French research system. This structure has created a unique opportunity to conduct an interdisciplinary study of the carbon footprint of French research laboratories (electricity consumption, heating, business travel, equipment purchases, commuting, etc.) and to identify the obstacles and levers for change in higher education and research practices. The main results obtained are described in this presentation. In particular, a way of taking into account the carbon emissions of research infrastructures such as those of the LHC in scenarios that comply with the commitments of the Paris Agreements will be presented.

Speaker: Samuel Calvet (LPCA, CNRS / IN2P3 / UCA (Clermont-Ferrand, FR))

Labos1p5_ICHEP2026_SustainibilitySession_Bresil.pdf

9:15 AM High-level environmental sustainability guidelines for large accelerator facilities

The construction of next-generation particle accelerator facilities, alongside upgrades to existing infrastructures, presents a timely opportunity to embed environmental impact reduction strategies into their lifecycles. Large accelerator facilities deliver significant scientific and societal benefits. They are also long-lived, resource-intensive systems with environmental impacts spanning planning, construction, operation, and decommissioning. There are many efforts ongoing to reduce these environmental impacts, however the community has reported many levels and layers of challenges that require non-generic guidance.
In this talk, the authors present a living document that initiates the provision of high-level, accelerator-specific guidance to support improved environmental sustainability across a facility’s lifecycle. Developed in response to community interest, the document consolidates tools, resources, and examples of current and proposed practices, while identifying areas requiring further research.

Speaker: Dr Hannah Wakeling (John Adams Institute, University of Oxford)

2026_08_01_ICHEP2026_High-Level-Guidelines.pdf

9:30 AM Updates from the Sustainable HECAP+ Initiative

Since its inception following the first Sustainable HEP Workshop in 2021, the grassroots Sustainable HECAP+ (High Energy Physics, Cosmology, Astroparticle Physics and related disciplines) Initiative has worked to improve the environmental sustainability of basic research by disseminating knowledge, facilitating connections, developing resources, and fostering individual and group projects.
This talk will provide an update on the efforts of the Initiative over the last year, highlighting lessons learned and outlining future projects.

Speaker: Peter William Millington (University of Manchester)

ICHEP 2026 [Millington, Sustainable HECAP+ Initiative].pdf

ICHEP 2026 [Millington, Sustainable HECAP+ Initiative].pptx

9:45 AM Environmental Impact and Considerations for Future Accelerator Facilities

The Large Particle Physics Laboratory Directors Group (LDG), which coordinates the development of HEP accelerators in Europe, established a Sustainability Panel in 2024 with the mandate to develop guidelines and a minimum set of key indicators for the sustainability assessment of future accelerators. While focused on accelerator projects, the proposed framework is also relevant to existing and future research infrastructures. The Panel’s findings and recommendations have been submitted as input to the process for the 2026 Update of the European Strategy for Particle Physics (http://arxiv.org/abs/2509.11705).
With its renewed mandate for 2026-2028, and building on previous work, the Panel is committed to analysing best practices in the construction and operation of sustainable accelerator-based research infrastructures, including their potential for improvement and associated cost–benefit aspects. This contribution summarizes Panel’s activities and invites feedback from the wider community.

Speaker: Dr Maksym Titov (IRFU, CEA Saclay, Université Paris-Saclay (FR))

LDGWG_1AUG2026_310726_v0.pdf

10:00 AM Software Advancements for Sustainable Computing in WLCG

The High-Luminosity LHC (HL-LHC) era will bring a substantial increase in the computing demands for the Worldwide LHC Computing Grid (WLCG), posing important challenges in terms of costs, energy consumption, and environmental sustainability. In this context, WLCG has established a Sustainability Forum to coordinate community-wide efforts aimed at reducing the environmental footprint of HEP computing. This talk presents an overview of WLCG's findings, constraints, and their sustainability strategy, highlighting how advancements in software and hardware acceleration can translate into important energy savings. At the same time, power-aware benchmarking through HEPScore23 provides insights into the impact of hardware choices and configurations. As a main example how a reduction can be achieved, we discuss recent developments in Monte Carlo event generation, namely MadGraph (using a plugin for hardware acceleration) and PEPPER, where GPU acceleration and CPU vectorization have demonstrated considerable performance gains and measurable reductions of energy consumption per event. Furthermore, we discuss other initiatives, like GPU acceleration of detector simulation with AdePT and Celeritas, and machine-learning-based fast simulation with FlashSim. These efforts show that targeted software improvements, combined with the adoption of heterogeneous architectures, represent a viable path toward more sustainable computing for the HL-LHC era.

Speaker: Daniele Massaro (CERN)

Massaro_ICHEP-2026_TALK.pdf

8:30 AM → 10:15 AM Strong Interactions and Hadron Physics

Convener: Patricia Magalhaes (UNICAMP)

8:30 AM Hyperon-Nucleon interactions at BESIII

With the existing 10 billion J/ψ events accumulated at BESIII, the high production of long-lived baryons in J/ψ decays serves as a novel source of hyperon beams, which open a unique opportunity for exploring the hyperon-nucleon interactions. By studying these hyperons with the beam pipe and the inner tube of the MDC detector, the recent results achieved at BESIII, including interactions of $\Lambda$p, $\Sigma$ p and $\Xi$ n, will be presented. Also, the perspectives at the future tau-charm factory are presented.

Speaker: Hongfei Shen

Hyperon_nueclon_BESIII_Brazil.pdf

8:45 AM $K^-\pi^+$ unitary amplitude as an input to $D^+\to K^+K^-\pi^+$ decay amplitude

The three-body decay $D^+\to K^+K^-\pi^+$ is of great physical interest, being an expected source of Charge-Parity Violation (CPV) and potentially physics beyond the Standard Model. Typically, amplitude analysis is performed using the Standard Isobar Model (SIM), where a coherent sum of resonances is used. This approach neglects the role of non-resonant meson-meson interaction. In this talk, we present the construction of a unitary $K^-\pi^+$ amplitude derived from an extension of Unitarized Chiral Lagrangian, that incorporates isospin symmetry and coupled channels. Unlike SIM approaches, this framework treats properly resonant and non-resonant contributions as part of the same meson-meson interaction, avoiding arbitrary background parameterizations. This approach captures all two-body interactions between $SU(3)$ mesons and can accommodate any number of resonances up to the mass of the D-meson. We will discuss the specific contributions to the $K^-\pi^+$ amplitude, including the contribution from $K\eta'$ coupled-channel. The resonance parameters, such as mass and coupling, are determined by fitting the two-body amplitude to experimental scattering data. Finally, this unitary coupled-channel $K^-\pi^+$ amplitude is constructed to serve as input for the $D^+\to K^+K^-\pi^+$ decay analysis in the near future.

Speaker: Lucas Aurélio Quitakava Ferreira da Silva

ICHEP2026_final.pdf

9:00 AM Beauty production studies via quarkonia measurements in proton-proton collisions with ALICE

Charm and beauty quarks are produced at the earliest stages of ultrarelativistic heavy-ion collisions through hard scattering processes. Quarkonium production can be used as a probe of the perturbative aspects of quantum chromodynamics (QCD) via the heavy quark production in the initial hard scattering, while the non-perturbative aspects are crucial in the subsequent formation of the heavy quark–antiquark bound state. Moreover, charmonium production can be splitted into two main components: a prompt contribution from directly produced charm–anticharm pairs and a non-prompt contribution from the decays of beauty hadrons. In this talk, measurements of prompt and non-prompt J/𝜓 production performed by the ALICE Collaboration in pp and Pb–Pb collisions will be presented at mid (|𝑦| < 0.8) and forward rapidity (2.5 < 𝑦 < 3.6). Thanks to the upgraded ALICE detector in Run 3 and the high luminosity data collected, the first preliminary measurements of the B+ meson cross section at midrapidity in pp collisions at √s = 13.6 TeV will be shown, along with the first results on prompt and non-prompt 𝜓(2𝑆) production at midrapidity. The experimental data will be compared with the existing theoretical models.

Speaker: Paul Veen (Université Paris-Saclay (FR))

ichep2026-paul-veen.pdf

9:15 AM Observation of $\chi_c(2P)$ quarkonia in the $e^+ e^- \to e^+ e^- D \bar D$ reaction

The continuum mechanism with the t/u-channel $D^∗$ exchanges are considered [1]. The results depend on the parameter of the off-shell form-factor for the virtual $D^∗$ mesons. The $D^{∗}D\gamma$ coupling constants are found from the $D^∗\to D \gamma$ decays. We find relatively large contribution for the $D^0 {\bar D}^0$ channel and smaller contribution in the $D^+ D^−$ channel. In the second case we consider the $D^±$ exchanges. The bump at $M_{D^0 {\bar D}^0}$=3.8 GeV observed by the Belle and BaBar has continuum origin than it corresponds to the broad resonance $\chi_{c0}(3860)$. We discuss production of the $\chi_{c2}(3930)$ resonance which is a candidate for the $\chi_{c2}(2P)$ state. This state decays into both $D \bar D$ channels, however the branching fractions are not well known. From a comparison of our model results to the BaBar data we find $B(\chi_{c2}(3930)\to D\bar D)$=0.58±0.13 using $\Gamma_{\gamma\gamma}$=0.544 keV (Buchmuller-Tye potential) evaluated within the light-front approach (NRQCD limit). Realistic predictions of the differential distributions in several variables are given for the Belle II kinematics.In summary, we explain the invariant mass distributions of $D\bar D$ mesons as a combination of continuum and $\chi_c(2P)$ resonances.

[1] I. Babiarz, P. Lebiedowicz, W. Schaefer and A. Szczurek,
arXiv2511.16862, in print in Phys.Lett.B.

Speaker: Antoni Szczurek (Rzeszow University)

talk_DDbar_ichep2026.pdf

9:30 AM Probing strong interactions in charm hadron-light particle systems with femtoscopy with ALICE

Studies of strong interactions between hadrons provide a unique opportunity to test Quantum Chromodynamics calculations at nucleon-scale distances. The femtoscopy technique, based on measuring correlations of hadron pairs, is a powerful tool to study interactions involving short-lived particles. While strong interactions among light and strange hadrons have been extensively investigated, corresponding studies for charm hadrons remain scarce. Such measurements can offer critical insights into the formation of exotic charm states or nuclei containing charm quarks.

In this contribution, we present femtoscopic measurements of the strong interaction between charm and light-flavor hadrons. The first ever measurements of correlation functions of protons with $\Lambda_\mathrm{c}^+$ baryons and $\mathrm{D}^+$ mesons in pp collisions at $\sqrt{s} = 13.6$ TeV are presented. Moreover, a new measurement of the proton--$\mathrm{D}^-$ meson correlation function obtained from the analysis of pp collision data collected during LHC Run 3 is discussed. It significantly improves the precision of the previous ALICE result based on Run 2 data, is discussed. These measurements open a new avenue for exploring charm–hadron interactions and their role in the formation of charm-baryon bound states.

Speaker: Biao Zhang (Heidelberg university(DE))

ICHEP2026_Charm_femto_v5.pdf

9:45 AM High-precision QCD physics at FCC-ee

The electron-positron stage of the Future Circular Collider (FCC-ee) is aiming at direct and indirect searches for physics beyond the SM in a new 91-km tunnel at CERN. In addition, the FCC-ee offers unique possibilities for high-precision studies of the strong interaction in the clean environment provided by e$^+$e$^-$ collisions, thanks to its broad span of center-of-mass energies, ranging from the Z pole to the top-pair threshold, and its huge integrated luminosities yielding $O(5\times 10^{12})$ and $O(2\times10^8)$ jets from Z and W bosons decays respectively, $O(2\times 10^5)$ pure gluon jets from Higgs boson decays, as well as O(2\times10^6) top quarks. In this contribution, we will summarize the impact that the FCC-ee will have on our improved knowledge of the strong force including: (i) QCD coupling determinations with permil uncertainties, (ii) ultraprecise studies of parton radiation and jet properties (ligh-quark/heavy-quark/gluon discrimination, jet substructure, etc.); and (iii) accurate scrutiny of nonperturbative QCD phenomena (color reconnection, hadronization, final-state hadron interactions,...).

Speaker: Michael Pitt (CERN)

QCDatFCCee_MPitt.pdf

8:30 AM → 10:15 AM Beyond the Standard Model

Convener: Prof. Alexander Belyaev (University of Southampton & Rutherford Appleton Laboratory)

8:45 AM Search for rare decay of SM Higgs to light scalars in the CMS experiment

A variety of searches for the SM Higgs boson decaying to a pair of light scalars are performed with p-p collisions data collected by the CMS detector. In this talk, we present recent highlights from these searches.

Speaker: Fengwangdong Zhang (Universite Libre de Bruxelles (BE))

higgs_aa_talk_feng.pdf

9:00 AM BSM Phenomenology in the tthh channel

The t-tbar-Higgs-Higgs (tthh) channel was once called the forgotten channel, as the small cross section made it widely believed that this channel could not compete with ttH or Double Higgs in terms of probing Standard Model couplings and the physics beyond. I'll review a set of recent works that show how this channel is not only complementary, but also competitive, specially in terms of constraining effective operators that only appear here at tree level. I'll go further and show some interesting beyond SM models that generate those operators, such as Composite Higgs Models, and their particular signal in the ttHH channel.

Speaker: Ricardo D'Elia Matheus

matheus_RD_ICHEP2026.pdf

9:15 AM Searches for new physics with CMS in events with photons and leptons in the final state

Many new physics models such as compositeness, extra dimensions, extended Higgs sectors, supersymmetry, and dark sectors are expected to manifest themselves in the final states with photons and/or leptons. This talk presents searches in CMS for new phenomena in such final states, focusing on the recent results obtained using the full Run-II and Run-III data-set collected by the CMS Experiment at the LHC.

Speaker: Kyungmin Park (Carnegie-Mellon University (US))

CMS_LeptonPhoton_KyungminPark_ICHEP20260801.pdf

9:30 AM Top Quark Pair Production and Decay: The 1-Higgs-Singlet Model and Pseudoscalar Decay

The process of top quark pair production through the decay of the scalars in the 1-Higgs-singlet extension of the Standard Model is associated with large interference effects between the loop-induced SM-like Higgs boson and heavy Higgs boson amplitudes, and the QCD continuum background. We attach leptonic decays to the di-top final state at NLO and study the effects of spin correlation in the process. We also make phenomenological predictions for the leptonic decays of the top quark pair produced by the decaying of a CP-odd pseudoscalar at the LHC at NLO accuracy, with the full spin correlation effects preserved in the decayed products. We attach Parton Showers and perform analyses of differential cross sections as functions of various observables to study the significance of the results in searches for new scalars and pseudoscalars beyond the Standard Model.

Speaker: Vishakha Lingadahally

ICHEP2026_Vishakha-Lingadahally.pdf

9:45 AM Physics results with the CMS Precision Proton Spectrometer and projections for the HL-LHC with PPS2

This talk will present the recent results from various analyses on signals containing intact protons measured by the CMS Precision Proton Spectrometer (PPS), which includes searches for New Physics in the electroweak sector. As the operation of the HL-LHC will require more stringent selection of intact protons due to the higher pileup, the PPS2 project will be presented and projections for potential physics analyses with the upcoming data from Phase-II will be discussed.

Speaker: Clemencia Mora Herrera (CBPF - Brazilian Center for Physics Research (BR))

pps_phys_ichep2026_v801.pdf

8:30 AM → 10:15 AM Operation, Performance and Upgrade of Present Detectors

Convener: Ana Amelia Bergamini Machado

8:30 AM Ultra-displaced dimuon vertexing for long-lived particle signatures in ATLAS

This talk presents a new secondary-vertexing technique based exclusively on StandAlone muon tracks reconstructed in the ATLAS Muon Spectrometer. These tracks, formed from Muon Spectrometer measurements without an associated Inner Detector track, naturally arise from highly displaced muon decays and are extremely rare for Standard Model processes. By exploiting the full detector-wide track extrapolation model and a dedicated Kalman-filter-based vertex fit, this method enables the reconstruction of dimuon vertices throughout the ATLAS detector volume, well beyond the reach of conventional Inner Detector–based approaches.

The algorithm is demonstrated on benchmark LLP scenarios spanning a wide range of masses, boosts, and decay topologies, and is validated in Run~3 data using a novel tag-and-probe strategy based on $J/\psi \to \mu\mu$ decays reconstructed solely with Muon Spectrometer information. This approach opens access to a previously unexplored region of LLP phase space and provides a powerful new tool for the ATLAS long-lived particle search program.

Speakers: Mrs Audrey Katherine KVAM (Massachusetts), Audrey Katherine Kvam (University of Massachusetts (US))

ICHEP-MuSAvtx.pdf

8:45 AM LHCb trigger and offline strategies for physics with displaced vertices in the magnet region

Precise reconstruction of displaced vertices and associated decay chains is critical for many flavour-physics analyses, and searches for long-lived particles with lifetimes above 100 ps. In LHCb, these signatures often occur far from the high-resolution trackers, inside the dipole magnet region. Reconstructing these signatures with LHCb’s forward and segmented tracking system is challenging. It is only possible using short track segments with limited momentum resolution that require numerical extrapolation over long distances within a complex magnetic field. To meet these challenges in LHCb’s fully software trigger, these signatures are reconstructed with a new high-quality, fast-extrapolation strategy that caches precomputed states and interpolates between reference points. This avoids costly numerical integration and improves displaced-vertex yields and purity without affecting throughput, leveraging GPU texture-memory techniques. Machine learning techniques are used for fast online event selection. Offline, these advances and others are consolidated in a modular, extensible C++ decay-tree reconstruction framework integrated around LHCb’s software framework. Designed for complex constrained topologies and decays inside strong and non-uniform magnetic fields, it is also applicable to other experiments. Performance studies show large improvements in efficiency, invariant-mass resolution, and vertex resolution, expanding the physics reach for precision measurements and long-lived particle searches at LHCb.

Speaker: Giorgia Tonani (Università degli Studi e INFN Milano (IT))

FTF_ICHEP_Tonani.pdf

9:00 AM The Universal Fake Factor method: a new technique for estimating the background from jets misidentified as τ-leptons with the ATLAS experiment

Physical processes involving τ-leptons in the final state play a pivotal role in precision measurements and searches for new physics with the ATLAS experiment. The usage of channels where τ-leptons decay into hadrons exploits the large statistics associated with such decays but requires to estimate a sizable background of hadronic jets misreconstructed as fake τ-leptons.

This talk will present a new technique developed within ATLAS to predict the fake τ-lepton background from data - the Universal Fake Factor method. The method exploits a fake factor whose systematic uncertainty is assessed between 15% and 35%. It improves on previous techniques as it considers the extent to which different jet sources (light quark, gluon, b-quark, and pile-up) originate fake -leptons. Information will be given on ATLAS measurements with single and di- final states that successfully exploited the method, as well as future prospects on its usage in Run 3 ATLAS analyses.

Speaker: Giovanni Padovano (Sapienza Universita e INFN, Roma I (IT))

ATL-COM-PHYS-2026-555.pdf

9:15 AM Real-time reconstruction at 30 MHz for LHCb during Run 3

The LHCb experiment has undergone a major upgrade for Run 3 of the Large Hadron Collider, transitioning to a fully software-based trigger that processes proton–proton collisions at the full 30 MHz bunch-crossing rate. This paradigm shift removes the traditional hardware trigger and enables real-time event reconstruction and selection with offline-quality algorithms. In this contribution, we present the design, performance, and operational experience of LHCb’s real-time reconstruction during Run 3. Emphasis is placed on the handling of the high-throughput constraints, detector occupancies, and physics performance across a broad range of reconstruction tasks. We demonstrate that high-precision tracking, vertexing, and particle identification are achieved in real time. The success of real-time reconstruction at 30 MHz establishes a new standard for trigger systems at hadron colliders and provides valuable insights for future high-luminosity experiments.

Speaker: Saverio Mariani (CERN)

Mariani_ICHEP_01082026-1.pdf

9:30 AM Transforming Flavour Tagging with the ATLAS Detector: ML tools and calibration techniques

The identification of jets containing b-hadrons is essential for many physics analyses at the LHC, including precision measurements of Higgs boson and top-quark processes, as well as searches for physics beyond the Standard Model. We present recent improvements in the discrimination of b-jets from jets originating from lighter quarks using the ATLAS detector. These advances are driven by state-of-the-art machine learning techniques based on transformer architectures. Their performance is well modelled by the ATLAS simulation, as demonstrated through dedicated calibration studies, the results of which will be presented. Compared to previous algorithms, the transformer-based approach improves the rejection of c-jets (light-jets) by factors of 3.5 (1.8) at a b-jet tagging efficiency of 70%. We also discuss the latest version of this algorithm and its expected performance at the High-Luminosity LHC (HL-LHC).

Speaker: Wonho Jang

ICHEP_FTAG_Wonho.pdf

9:45 AM Track fitting at the full LHC collision frequency: Design and performance of the GPU-based Kalman Filter at the LHCb experiment

The first stage of the LHCb trigger system, running on approximately 500 GPU cards, performs a track pattern recognition to reconstruct particle trajectories with low latency. Starting with the 2025 data-taking period, a novel approach has been introduced for precise track parameter estimation: a custom Kalman Filter, highly optimized for GPU execution, is now employed to fit tracks at the full collision rate of 30 MHz. This implementation leverages dedicated parametrizations of material interactions and the magnetic field to meet stringent throughput requirements. This is the first time such a high-precision track fitting is performed at the full LHC collision frequency in any experiment. The result is a marked improvement in the momentum and mass resolution, increased robustness against detector misalignments, and a reduced rate of fake tracks. Moreover, this development represents a critical step toward future full event reconstruction at the LHC collision rate. In this talk, we will outline the requirements for real-time track fitting in LHCb’s first-level trigger, detail the implementation of the Kalman Filter on GPUs, and present a comprehensive performance evaluation using the 2025 and 2026 data set.

Speaker: Alessandro Scarabotto (Technische Universitaet Dortmund (DE))

A_Scarabotto_Kalman_Filter_at_LHCb_ICHEP_2026_final.pdf

10:00 AM ATLAS ITk Tracking Performance and Software Developments for Run 4

This contribution presents the expected tracking performance of the ATLAS ITk based on the latest detector layouts and software developments. Excellent efficiency, resolution, and control of mis-reconstructed tracks are demonstrated in high-occupancy environments, validating the ITk design for HL-LHC conditions.
A central element of the Run-4 tracking strategy is the migration to ACTS, an experiment-independent tracking toolkit. The ongoing integration involves a redesign of reconstruction algorithms and the ATLAS Event Data Model, enabling a scalable, thread-safe, and maintainable software architecture. The current status of ACTS-based ITk tracking and its performance and computational characteristics are discussed.
In addition, machine-learning approaches based on Graph Neural Networks (GNNs) are explored as a complementary solution for track reconstruction at extreme pile-up. Recent advances in the GNN4ITk pipeline are presented, including improvements in physics performance and significant gains in computational efficiency through model optimization, GPU acceleration, and integration into the ATLAS software framework.

Speaker: Goetz Gaycken (University of Oregon (US))

ICHEP20260801_gaycken.pdf

8:30 AM → 10:15 AM Quark and Lepton Flavor Physics

Conveners: Jianchun Wang (Chinese Academy of Sciences (CN)), Michal Koval (Charles University (CZ))

8:30 AM Measurements of lepton-flavor universality in semileptonic $B$ decays at Belle and Belle II

The Belle and Belle II experiments have collected a $1.2~\mathrm{ab}^{-1}$ sample of $e^+ e^-\to B\bar{B}$ collisions at a center-of-mass energy corresponding to the $\Upsilon(4S)$ resonance. These data, with low particle multiplicity, constrained initial state kinematics and excellent lepton identification, are an ideal environment to study lepton-flavor universality in semileptonic decays of the $B$ meson. We present new results on the ratios of semitauonic $B$ decay rates compared to those to light leptons. These include new measurements of the ratios for exclusive $B\to D^{(*)}\ell \nu$ decays $R(D^{(*)})$ in decays where the other $B$ in the event is reconstructed in hadronic or semileptonic final states. We also present a measurement of the $\tau$ polarization in $B\to D^* \tau \nu$ decays.

Speaker: Ilias Tsaklidis (University of Bonn)

2026_iCHEP_BelleII_LFU_itsaklid_v5.pdf

8:45 AM Measurements of electroweak penguin $B$ decays with missing energy at Belle and Belle II

The Belle and Belle II experiments have collected a $1.2~\mathrm{ab}^{-1}$ sample of $e^+ e^-\to B\bar{B}$ collisions at a center-of-mass energy corresponding to the $\Upsilon(4S)$ resonance. These data, with low particle multiplicity and constrained initial state kinematics, are an ideal environment to search for rare electroweak penguin $B$ decays to final states with missing energy from neutrinos. We present new results on $B\to K^{(*)}\nu\bar{\nu}$ using an inclusive tagging technique, including the first results from Belle. We will also present a search for inclusive decays $B\to X_s\nu\bar{\nu}$, where $X_s$ is a hadronic system with strangeness. We will also present searches for the decays $B^+\to K^+\tau^+\tau^-$ and $B^0\to K^0_S\tau^+\tau^-$.

Speaker: Lorenz Gaertner

ichep-gaertner.pdf

9:00 AM Measurements of electroweak penguin $B$ decays without missing energy at Belle and Belle II

The Belle and Belle II experiments have collected a $1.2~\mathrm{ab}^{-1}$ sample of $e^+ e^-\to B\bar{B}$ collisions at a center-of-mass energy corresponding to the $\Upsilon(4S)$ resonance. We present results on the inclusive decay $B\to X_s\ell^+\ell^-$, where $X_s$ is a hadronic system with strangeness. We also present a new measurement of the inclusive rate for radiative $B$ decays $b\to s\gamma$.

Speaker: Trevor Shillington

ICHEP 2026-16.pdf

9:15 AM Challenging neutrino effects in $B\to K^{(\ast)}\nu\nu$ and $K\to \pi\nu\nu$ decays

The first measurement of $B^+ \to K^+\nu\overline{\nu}$ by the Belle-II experiment and of $K^+\to \pi^+\nu\overline{\nu}$ by NA62 are important achievements in precision tests of Standard Model flavor physics. In this talk, we explore the phenomenology of EFT scenarios that contribute to these processes, going beyond the dimension-six SMEFT operators. We focus on their interplay with constraints from neutrino physics, such as neutrino masses and $0\nu\beta\beta$. First, without including additional light degrees of freedom, we consider new physics contributions from lepton number violating SMEFT operators. As a consequence of the mixing among effective operators, we show that measurable contributions to $B^+\to K^+\nu\overline{\nu}$ are tightly constrained, while sizable effects in $K^+\to \pi^+\nu\overline{\nu}$ remain possible, under the requirement of avoiding fine-tuning in neutrino masses. We further show how the inclusion of a light Majorana neutrino is sufficient to circumvent these limitations, allowing for measurable effects in both decay channels within a natural framework. Finally, we demonstrate that Wilson coefficients preferred by Belle-II results lead to active-sterile neutrino mixing that could be within reach of future experiments.

Speaker: Luighi Leal (University of São Paulo, IFUSP)

Luighi_Leal_ICHEP_2026.pdf

9:30 AM Latest jet flavour tagging studies at FCC-ee

Jet flavour identification algorithms are of paramount importance to maximise the physics output in e+e- collisions at the Future Circular Collider (FCC-ee). Among the extensive FCC-ee physics program, flavour tagging is crucial for the Higgs, Electroweak and top-quark programs, given the dominance of hadronic decays of the heaviest particles of the Standard Model (SM). A highly efficient discrimination of b, c, strange, and gluon jets allows to access novel decay channels that are not accessible at the LHC, increasing significantly the physics potential of the SM precision measurements and searches for new physics at FCC-ee. In this contribution, we will present the latest results on jet flavour tagging, based on machine learning techniques, applied to concrete FCC-ee physics studies. Beyond an excellent performance on b- and c-quark tagging, the future taggers will be able to discriminate strange quark jets, opening the way to the measurement of the strange-quark Yukawa coupling, as well as observing very rare flavour-changing neutral current processes, such as Z->bs. Potential strategies for calibrating the jet taggers will be also discussed.

Speakers: David d'Enterria (CERN), Kyle Cormier (CERN)

JetFlavourFCCee-1.pdf

9:45 AM Theoretical benchmarks for experimental searches of rare vector B-meson decays

The unprecedented luminosities of the HL-LHC and Belle~II require precise and coherent Standard Model predictions for rare vector $B$-meson decays. We developed a unified phenomenological framework that consistently describes nonleptonic, semileptonic, and radiative decays of vector $B_{u,d,s,c}$ mesons using a common set of hadronic form factors. This approach enables a systematic reduction of theoretical uncertainties and delivers internally consistent predictions for experimentally relevant observables. Our results provide ready-to-use benchmarks for angular analyses, CP-violation searches, and lepton flavor universality tests, directly supporting the design, optimization, and interpretation of future measurements of rare $b \to s/d/c$ transitions at ATLAS, CMS, LHCb, and Belle II.

Speaker: Zhomart Tyulemissov

ICHEP2026_rare_vector_B.pdf

8:30 AM → 10:15 AM Heavy Ions

Convener: Evgeny Kryshen (Joint Institute for Nuclear Research (RU))

8:30 AM Large anisotropies in pA collisions using a new Glauber model

A new Glauber model for pA collisions was developed by making use of the KMR/SHRiMPS nucleon-nucleon cross sections calculation. This calculation describes the nucleonic interactions as exchanges of gluon ladders between the partons making up the incoming hadrons. The resulting cross sections have a non-trivial impact parameter dependence, which naturally comes out of the calculation. This adds an additional source of fluctuation when sampling wounded nucleons using such cross sections and, as recently shown in Eur. Phys. J. C 86, 63 (2026), such fluctuations are allow for the description of large anisotropies in the wounded nucleon distributions in pPb collisions when compared to the ones obtained with the common black-disk models. This new Glauber model also describes high multiplicity events very well, which indicates that it can help describe the large anisotropies observed in high multiplicity pA collisions, thus contributing to uncover the puzzle of small systems.

Speaker: Chiara Le Roux

chiara_glauber 2.pdf

8:45 AM On the hunt for thermal radiation with low-mass dileptons in ALICE

Electromagnetic probes such as dileptons are a unique tool for studying the space-time evolution of the hot and dense matter created in ultra-relativistic heavy-ion collisions. Such pairs, being emitted throughout the entire system evolution, carry information from the moment of their creation to the detector unperturbed by strong final-state interactions, allowing one to get a direct access to the thermal radiation from early hot stages of the collision. At the LHC energies however, this signal sits on top of a large background from correlated semi-leptonic heavy-flavour decays, which makes the separation of prompt and non-prompt sources vital for the measurement of thermal radiation. The studies of dilepton production in proton–proton or light ions can shed light on possible onset of thermal radiation in smaller systems.

This talk will present an overview of ALICE results on the low-mass dielectron and dimuon production in pp, OO and Pb–Pb collisions at various collision energies using high-precision data collected during the LHC Run 3. The dilepton yield is compared to the sum of all known hadronic sources. Thanks to the new inner tracking system, the dielectrons from heavy-flavour hadrons can be identified and separated from the prompt sources using a data-driven approach.

Speaker: Sebastian Scheid (CERN)

dileptons_scheid.pdf

9:00 AM Probing nucleon structure at LHCb

With its unique forward geometry, the LHCb detector provides unprecedented access to very low Bjorken-$x$ inside the nucleon. Its excellent momentum resolution, vertex reconstruction, and particle identification enable precision measurements of charged and neutral light hadrons, as well as rarer probes such as heavy quarks, down to very low transverse momentum. These data provide unique constraints on nuclear parton distributions and the possibility to study the gluon saturation regime at unprecedented precision. This contribution will discuss recent LHCb measurements sensitive to the structure of nucleons, and discuss their impact on global analyses of nuclear parton distribution functions.

Speaker: Camilla De Angelis (Universita e INFN, Cagliari (IT))

ICHEP26_deangelis_v2.pdf

9:15 AM Investigating the early magnetic field and angular momentum in Pb-Pb collisions with charm hadrons with ALICE

In ultrarelativistic heavy-ion collisions, a quark–gluon plasma (QGP) is formed. Charm and beauty quarks are produced predominantly in early hard partonic scatterings, on timescales shorter than the medium formation time. In non-central collisions, they are sensitive to the fireball’s initial angular momentum and to the strong magnetic field generated perpendicular to the reaction plane. These conditions can induce charm-quark polarisation, which is expected to be transferred to charm hadrons during hadronisation. Experimentally, charm polarisation can be studied via the spin density matrix element $\rho_{00}$ of spin-1 mesons (e.g. D$^{*+}$) and the longitudinal polarisation $P_{\rm z}$ of spin-1/2 baryons (e.g. $\Lambda_{\rm c}^{+}$). Measurements in pp collisions provide an essential baseline and help constrain possible polarisation sources unrelated to the magnetic field and system angular momentum.

This contribution reports a new measurement of the D$^{*+}$ $\rho_{00}$ parameter in Pb–Pb collisions at $\sqrt{s_\mathrm{NN}}=5.36$ TeV, obtained with significantly improved precision compared with the previous Run 2 result. In addition, measurements of D$^{*+}$ $\rho_{00}$ and of the longitudinal polarisation $P_{\rm z}$ of $\Lambda_{\rm c}^{+}$ baryons in pp collisions at $\sqrt{s}=13.6$ TeV are presented, separating the prompt and non-prompt components in the latter case.

Speaker: Mingze Li (Central China Normal University CCNU (CN))

ICHPE_2026_Spin_v5.pdf

9:30 AM New probes of nuclear gluon dynamics in inelastic ultraperipheral Pb-Pb collisions in ALICE

Inclusive photonuclear processes with a gluon exchange lead to the break up of the target nucleus. The cross sections for these interactions are large in Pb–Pb collisions at the LHC. These interactions provide a novel measure of cold nuclear matter effects. The leading order process to produce a $c \bar{c}$ pair is through gamma-gluon fusion. It thus provides a direct probe of the nuclear gluon distribution. The $c \bar{c}$ pair will primarily fragment into open charm mesons ($D^0$, $D^*$, etc.), but may also form a $J/\psi$ or $\psi$(2S). On the other hand, the study of strange hadrons reveals the picture behind hadronization models at limits probing the higher energies in photonuclear interactions. Large detector upgrade and streaming readout opened possibilities to study inclusive processes within the ALICE detector. The first measurements of cross sections and transverse momenta as well as rapidity distributions of charged pions, kaons and protons, $D$ and $J/\psi$ mesons, neutral kaons and $\Lambda$ baryons will be presented in this talk. The Pb-Pb photonuclear measurements at $\sqrt{s_{\rm NN}}=5.36$~TeV will be compared to model calculations and other systems' results.

Speaker: Roman Nepeivoda (Lund University (SE))

ichep-rnepeiv-v4.pdf

9:45 AM Description of the softened hadron production at LHC energies

In this work, we propose a methodology to quantify the production of softened hadrons in pp, pA, and AA collisions at LHC energies, as well as their contribution to the $p_T$ spectrum, effective temperature, and mean $p_T$. Within the color string fragmentation framework, we describe the charged particle production through the Tricomi function, resulting from the convolution of the Schwinger mechanism with $q$-Gaussian string tension fluctuations. In particular, the Tricomi function accurately describes the entire $p_T$ spectrum of experimental data from minimum bias and low multiplicity events in pp collisions, as well as peripheral events in AA collisions. This suggests that the fragmentation of color strings is the baseline for particle production. However, by analyzing the experimental $p_T$ spectrum for the most energetic, highest multiplicities, and central AA collisions, the Tricomi function deviates from the data in an intermediate $p_T$ region. This implies that mechanisms beyond color string fragmentation, such as color reconnection, parton recombination, energy loss, and jet quenching, among other collective effects, contribute to the enhancement of particle production at intermediate $p_T$ values. Consequently, the experimental $p_T$ spectrum originates from the combination of color string fragmentation and collective effects.

Speaker: Diana Rosales Herrera (Autonomous University of Puebla (MX))

ICHEP26.pdf

8:30 AM → 10:15 AM Astroparticle Physics and Cosmology

Convener: Carlos José Todero Peixoto (Universidade de São Paulo)

8:45 AM The CONDOR Observatory: Reaching 100 GeV Sensitivity in Gamma Rays at Extreme Altitude (5300 m a.s.l.)

The CONDOR (Compact Network of Detectors with Orbital Range) observatory is a proposed high-altitude gamma-ray and cosmic-ray (CR) facility that addresses critical gaps in astroparticle physics by bridging the observational divide between satellite detectors like Fermi-LAT and higher-energy ground-based arrays such as HAWC and LHAASO. This poorly explored sub-TeV energy range is essential for understanding particle acceleration and cosmic-ray propagation mechanisms. Its unprecedented altitude of 5300 m.a.s.l. on Cerro Toco in Chile's Atacama Desert—the highest site for any EAS-based observatory—exploits reduced atmospheric depth to achieve a groundbreaking 100 GeV threshold, enabling detection of gamma rays and CRs in the 100GeV-1TeV range via extensive air showers. This capability is vital for probing the origins and propagation of CRs through the interstellar medium, particularly in the sub-TeV domain where flux measurements remain sparse.

CONDOR's compact design features a central array of 5300 plastic scintillator detectors plus 1040 peripheral veto units, with wavelength-shifting fibers, SiPM readout, flash ADCs, and White Rabbit timing for precise synchronization. CORSIKA simulations validate key performance, including zenith-angle reconstruction, gamma–proton discrimination, and energy resolution, improving from ~50% at 100 GeV to below 20% above 500 GeV. These results demonstrate the scientific potential enabled by operating at extreme altitude.

Speaker: Dr Nicolas Viaux Maira (Federico Santa Maria Technical University (CL))

CONDOR_Observatory_L.pdf

9:15 AM Discriminating Heavy Cosmic Rays via Direct Cherenkov Light with the MAGIC Telescopes

Iron cosmic rays are the most abundant heavy nuclei at energies above 1 TeV and are believed to originate predominantly from astrophysical sources. Precise measurements of their energy spectrum provide key insights into the origin, acceleration, and propagation of cosmic rays. Recent observations by space-based detectors have revealed unexpected spectral features in the GeV–TeV range; however, their sensitivity at higher energies is limited by low statistics.

Above a few TeV, ground-based instruments such as the Major Atmospheric Gamma Imaging Cherenkov (MAGIC) telescopes offer a decisive advantage due to their large collection areas, enabling measurements that extend and complement those of space-borne experiments. In this work, we use the direct Cherenkov technique, which exploits the Cherenkov radiation emitted by primary charged particles prior to the development of the atmospheric cascade, to identify iron-induced air showers and discriminate them from showers initiated by lighter nuclei. Using this method, we measure the energy spectrum of cosmic-ray iron nuclei at TeV energies with the MAGIC telescopes.

Due to unforeseen circumstances, I missed the oral presentation deadline and was advised by the organizers to submit under the poster category. I would greatly appreciate consideration for an oral presentation if any slots remain available.

Speaker: Miguel Molero Gonzalez (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))

IronFlux_ICHEP2026_MMolero.pdf

9:45 AM From UHECRs to Neutrinos and Photons: Multimessenger Science at Auger

Identifying the sources of ultra-high-energy particles is inherently a multimessenger problem, requiring cosmic rays, photons, neutrinos, and gravitational waves to establish robust source associations and physical interpretations. The Pierre Auger Observatory in Malargüe, Argentina, combines a 3,000 km$^2$ surface array of 1,660 surface detector units with 27 fluorescence telescopes, enabling precise hybrid reconstruction up to $10^{20}$ eV. Auger is also sensitive to ultra-high-energy neutrinos and photons: neutrinos are identified in very inclined down-going and Earth-skimming channels using the time structure of surface-detector signals, while photons are selected via the characteristically muon-poor development of electromagnetic showers. We review recent results, including updated diffuse and targeted limits on photons above 1 EeV and neutrino searches with exposure dominated by the Earth-skimming channel. We summarize time- and direction-coincident follow-ups of LIGO–Virgo compact-binary mergers, including photon searches over 91 GW events and stacked neutrino searches over 93 BBH mergers, yielding no candidates and constraining ultra-high-energy emission. Finally, we outline Auger low-latency alerts to AMON (distributed via GCN) and prospects with AugerPrime for improved mass tagging and enhanced photon/neutrino discrimination.

Speaker: Joao de Mello Neto

multimessenger_auger_jtmn.pdf

10:15 AM → 10:45 AM Coffee break

10:45 AM → 12:30 PM Neutrino Physics

Conveners: Arman Esmaili (PUC-Rio), Dr Joel Jones-Perez

10:45 AM Tau neutrino as a probe of charged nonstandard interactions at DUNE

In this work, we study the influence of charged-current non-standard interactions (CC-NSI) at a DUNE-like experiment. We are particularly interested in the tau neutrino channel accessible at DUNE, given the higher energy neutrino flux expected to be achieved by the experiment. We focus on CC-NSI that may affect the pion decay, the primary source of neutrinos for DUNE. We show that the expected sensitivity at the near detector may supersede the present bounds coming directly from pion decay by one order of magnitude.

Speaker: Adriano Cherchiglia (Universidade Estadual de Campinas)

Tau.pdf

11:00 AM On the discrimination between beyond-standard-model neutrino oscillation scenarios at DUNE

We explore the ability of the DUNE experiment to discriminate between competing beyond–standard-model neutrino oscillation scenarios, including neutrino decay, non-standard interactions, quantum decoherence, and violations of the equivalence principle. We show that equivalence-principle violation is typically the most distinguishable scenario at DUNE. We further demonstrate that, even in cases where different scenarios cannot be statistically separated, sizable biases in the reconstructed oscillation parameters, such as the CP-violating phase, may occur.

Speaker: Alberto Gago (Pontificia Universidad Católica del Perú)

ICHEP2026_Talk_AGagov2.pdf

11:15 AM Searching for Long Lived Particles with the SBND Cosmic-Ray Tagger Modules

The Short-Baseline Near Detector (SBND) is one of three liquid argon time projection chamber (LArTPC) detectors used in the Short-Baseline Neutrino (SBN) Program at Fermilab. As the near detector in the SBN Program, the SBND is located just 110 meters from the target along the Booster Neutrino Beam (BNB). SBND offers sensitivity to a broad range of new physics scenarios, including the potential production and decay of long-lived particles. These particles could be produced through neutrino–nucleus scattering and then decay into lepton pairs as they travel through the detector region. Although full data-taking with the SBND LArTPC began in summer 2024, a subset of Cosmic Ray Tagger (CRT) modules arranged as a beam telescope was installed between 2017 and 2019 and collected a substantial dataset using the BNB. Originally intended for performance and commissioning studies, this dataset also provides an opportunity to search for long-lived particle decays. In this talk, we present a search for decays into electron–positron pairs using CRT data.

Speaker: Jiaoyang/ 娇瑒 Li/李 (Fermi National Accelerator Laboratory)

ICHEP_LLP_SBND_CRTBT_Li_Jiaoyang.pdf

11:30 AM Signatures of Mixing Parameters Running in Neutrino Experiments

The neutrino mixing parameters are expected to have renormalization group (RG) running effect in the presence of new physics. With mismatched energy scales between production and detection processes, the oscillation probabilities are generally modified and become dependent on not just the neutrino energy but also the momentum transfer. The effect generates differences from standard oscillation and is present also for vanishing baseline. In a series of works, we explore several consequences for RG running on neutrino mixing parameters for current and future neutrino oscillation experiments. Interestingly, we showed that short-baseline experiments are able to constrain the Dirac CP-phase meaning that reactor experiments such as JUNO-TAO is capable of searching for CP-violation in presence of RG running. We obtain bounds to to the deviation $\Delta \delta \equiv \delta_D(Q^2_d) - \delta_D(Q^2_p) < 4\times 10^{-2}$ at 68\% C. L. for current data, and expect an improvement for JUNO-TAO. We have also provide the impact of RG running on the DUNE experiment and developed a new $2$D statistical $\chi^2$ analysis as a smoking gun signal of RG running at DUNE's. Finally, we explore the potential of combining future neutrino experiments to significantly increase the sensitivity to the running of all the neutrino mixing parameters.

Speaker: Dr Pedro Pasquini (Unicamp)

ICHEP2026_PedroPasquini.pdf

11:45 AM Open system approach to neutrinos propagating in an ultralight scalar background

We provide a simple, ultraviolet-complete model for decoherence in neutrino oscillations: an ultralight scalar field coupled to neutrinos.
The new scalar induces time- and position-dependent changes in the neutrino mass matrix.
The stochastic nature of the field leads to damping effects in the oscillation pattern in the form of decoherence.
By recasting the neutrino-scalar dynamics within the framework of open quantum systems, we establish a concrete mapping between a complete model and effective approaches to decoherence in neutrino oscillations.
Contrary to typically assumed effective models, we find that the parameter driving decoherence scales as $L^2/E^2$, where $L$ is the baseline and $E$ is the neutrino energy, as opposed to $L/E$.

Speaker: Gustavo Alves

Alves_Gustavo_ICHEP2026.pdf

10:45 AM → 12:30 PM Electroweak and Top Quark Physics

Conveners: Jorge de Blas (Universidad de Granada (ES)), Miguel Ramos Pernas (CERN)

10:45 AM EFT results with top quarks at CMS

The Standard Model Effective Field Theory (SMEFT) provides a universal language for testing beyond the Standard Model physics at LHC scales. With increasing complexity and new sophisticated techniques, the sensitivity of these analyses gradually increases. In this talk, recent searches for anomalous couplings in the top quark sector from CMS will be presented. The new results significantly exceed previously achieved precision and prepare the path to explore the full potential of LHC data.

Speaker: Andrea Piccinelli (University of Notre Dame (US))

ICHEP_TOPEFT_CMS.pdf

11:00 AM EFT interpretations with top-quark events in ATLAS

Many-parameter fits to precise measurements in the framework of the Standard Model Effective Field Theory are becoming a standard interpretation of LHC and other collider data. In this contribution an overview is given of state-of-the-art EFT interpretations in ATLAS with particular emphasis on results in the top quark sector.

Speaker: Sylvia Louise Mason (Columbia University (US))

SylviaMason_ICHEP_2026 copy.pdf

11:15 AM Electroweak Precision Observables, Top and Higgs physics in the SMEFT

We present results from a global fit of dimension-six SMEFT operators
that includes electroweak, Higgs-boson, top-quark, and flavor
observables. The leading-order scale dependence of the SMEFT Wilson
coefficients is consistently included in the evolution from the UV
scale to the electroweak scale and the low-energy scale of flavor
observables. The global fit is obtained within the HEPfit framework
and is based on the state-of-the-art of both experimental results and
SM theoretical predictions for all the observables considered.

Speaker: Victor Miralles (University of Alicante)

VMiralles_ICHEP_HiggsEWTop.pdf

11:30 AM Six-Top Final States from Vector-Like Tops: New LHC Reinterpretations

The Fermionic Portal to Vector Dark Matter (FPVDM) framework generically predicts six-fermion final states arising from pair production of heavy vector-like fermions followed by cascade decays through a dark gauge sector. In the top-portal realisation (TPVDM), this structure leads to a distinctive six-top final state, which is essentially background-free and persists across almost the entire phenomenologically viable parameter space.

We present new reinterpretation results for this six-top signature using existing ATLAS and CMS Run-2 analyses targeting high jet multiplicities, multiple $b$-jets, and top-rich final states. A dedicated CLs-based combination of mutually orthogonal signal regions significantly improves sensitivity, extending current mass limits by up to $\mathcal{O}(100)$ GeV compared with any individual analysis. First projections for the High-Luminosity LHC indicate sensitivity to vector-like top partner masses in the $2.2-2.3$ TeV range.

The talk focuses on the collider phenomenology of the six-top signature in the top-portal scenario, while briefly outlining how other FPVDM realisations lead to different six-fermion final states, highlighting a concrete and largely unexplored opportunity for LHC reinterpretation.

Based on arXiv:2508.04912 and arXiv:2203.04681.

Speaker: Prof. Alexander Belyaev (University of Southampton & Rutherford Appleton Laboratory)

Belyaev-6tops-ICHEP2026.pdf

11:45 AM NRQCD uncertainties in top-quark pair production near threshold

We study bound-state effects in top-quark pair production close to threshold at the LHC, where sensitivity to non-relativistic dynamics has recently become accessible. Working within the non-relativistic QCD (NRQCD) framework, we assess the theoretical uncertainties affecting predictions for the top-quark pair invariant-mass distribution. We consider variations of the top-quark mass and width, the strong coupling, renormalization and factorization scales, as well as parton distribution functions. In addition, we provide a conservative estimate of uncertainties related to the limited accuracy of the color-singlet and color-octet Green's functions describing the formation of the quasi-bound top-quark pair state ("toponium"), which are computed using a Coulomb-like QCD potential. We compare these uncertainties with those of standard fixed-order QCD predictions at higher invariant masses and discuss implications for current and future ATLAS and CMS analyses.

Speaker: Oleksandr Zenaiev (Hamburg University)

Zenaiev-ICHEP2026-toponium.pdf

12:00 PM PDF and BSM interplay in the Top and Drell-Yan sectors

In this talk, I explore the interplay between the fits of Standard Model Effective Field Theory (SMEFT) Wilson coefficients and PDFs in two key sectors at the LHC, the Drell-Yan and the top sector.  I explore two complementary strategies for robust new physics searches: (i) fitting the PDFs and SMEFT parameters simultaneously, and (ii) fitting them separately with a “conservative” determination of the PDFs, using only observables that can safely be considered SM–like. I compare both methodologies in controlled closure tests in a realistic High-Luminosity LHC (HL-LHC) scenario. I conclude by proposing best-practice recommendations for robust indirect new physics searches at hadron colliders.

Speaker: Ella Cole (University of Cambridge (GB))

ICHEP_2026_COLE.pdf

12:15 PM YFS MC Approach to Precision High Energy Collider Physics with Collinear Enhancement: Current Status

We present new results using collinearly enhanced YFS IR resummation theory that includes all of the attendant collinear contributions which exponentiate. The new results are realized in the context of the KKMChh MC, where the attendant new resummed contributions have been shown to agree with known results from the collinear factorization approach. We argue that they improve the corresponding precision tag for a given level of exactness in the respective YFS hard radiation residuals. Comparisons with LHC data are illustrated.

Speaker: Bennie Ward (Baylor University (US))

ICHEP2026clyfs.pdf

10:45 AM → 12:30 PM Higgs Physics

Convener: Martina Laura Ojeda (CERN)

10:45 AM Searches for rare Higgs boson processes with the CMS detector

The full set of data collected by CMS experiment allows searches for rare processes of the Higgs boson, subdominant with respect to the ones already observed at the LHC, by using a variety of decay modes profiting the ones with largest expected branching fractions. Double Higgs boson production associated with a pair of top quarks is also considered.

Speaker: Nicolo Lai (Universita e INFN, Padova (IT))

LaiN_RareHiggs_ICHEP2026_v1.pdf

11:00 AM Higgs physics at the Large Hadron electron Collider LHeC

The LHeC is the proposal to deliver electron-proton/nucleus collisions at CERN using the LHC beams and a 50 GeV electron beam from an Energy Recovery Linac. While initially foreseen [1] for concurrent electron-hadron and hadron-hadron operation, a standalone electron-hadron operation phase has been proposed [2] in view of the current LHC schedule. Thus, the LHeC becomes a bridge from the HL-LHC to the next flagship at CERN, and one of the possible projects in the 2026 Update of the ESPP [3], were the FCC-ee as plan A not feasible.
In this talk we review the Higgs physics studies at the LHeC. We present the standalone determination of the Higgs couplings. We then explore the impact of the improved extraction of PDFs+$\alpha_s$ at the LHeC on Higgs coupling determination at the HL-LHC, as well as the implications on the Higgs mass extracted in EW fits, and on the cross section through gluon-gluon fusion. We finally discuss the comparison of the extraction of couplings in different combinations of future accelerators, highlighting the role of the combination HL-LHC+LHeC.
[1] LHeC/FCC-he Study Group, J. Phys. G 48, 110501 (2021), arXiv:2007.14491 [hep-ex].
[2] F. Ahmadova et al., e-Print: 2503.17727 [hep-ex].
[3] https://cds.cern.ch/record/2950671/files/CERN-ESU-2025-002.pdf?version=1.

Speaker: Simone Tentori (UCLouvain)

ICHEP2026_LHeC_Tentori.pdf

11:15 AM Measurements of Higgs boson coupling properties in fermion decay channels in ATLAS

Higgs boson decays to fermion pairs are an important probe of Yukawa couplings, and of properties of the Higgs boson more generally. This talk presents various measurements of Higgs boson decays into two bottom quarks, two charm quarks, or two tauons by the ATLAS experiment based on LHC Run 3 data and Run 2 data.

Speaker: Giuseppe Callea (University of Glasgow (GB))

GCallea-ICHEP-Higgs-fermions-final.pdf

11:45 AM Higgs to heavy-quark decays and forward top-quark production at LHCb using improved jet flavour tagging

Recent advances in jet reconstruction and machine-learning-based flavour tagging have significantly expanded the physics reach of the LHCb experiment beyond its traditional core programme. A new high-performance tagger exploiting full jet-constituent and secondary-vertex information enables precise separation of b, c and light-flavour jets in the forward region, providing a powerful tool for studies of heavy-quark final states. These developments underpin two new measurements at 13 TeV: the first LHCb searches for Higgs boson decays to bb and cc, and precision measurements of forward top-quark production in the muon plus b-jet channel. Improved flavour tagging allows robust control of QCD backgrounds and enhances sensitivity to Higgs decays to heavy quarks, while in top physics it enables differential cross-section and charge-asymmetry measurements in a unique rapidity regime complementary to ATLAS and CMS. This contribution presents the methods, results, and their implications for Higgs-coupling determinations and electroweak and top phenomenology, highlighting the growing role of LHCb in the broader LHC physics programme.

Speaker: Murilo Santana Rangel (Federal University of Rio de Janeiro (BR))

rangel_higgs.pdf

12:00 PM Measurement of off-shell Higgs boson production modes using the four-lepton final state in proton-proton collisions at √ s = 13 TeV with CMS

Measurements of Higgs boson production in the off-shell region are presented, using the four-lepton decay channel. Data from proton-proton collisions, collected by the CMS experiment with an integrated luminosity of 138\fbinv at a center-of-mass energy of 13\TeV, are utilized. This results in the most precise single measurement of light-quark Yukawa couplings to date and represents the first direct test of composite Higgs boson models. Additionally, tests of gluon-fusion production modes within the Standard Model EFT limit are conducted, and the first constraint on the Higgs boson self-coupling in the off-shell region is established. Constraints on the Higgs boson width are provided while accounting for a range of beyond-the-standard-model effects, including both light and heavy particles in the gluon fusion production loop, as well as modified couplings to vector bosons. I would like to upgrade this poster to a parallel talk if possible.

Speaker: Andro Petkovic (University of Split)

ICHEP_offshell_v2.pdf

10:45 AM → 12:30 PM Software, Computing and Data Handling

Conveners: Carla Marin Benito (University of Barcelona (ES)), Enrico Bothmann (CERN), Prof. Jianming Bian (University of California Irvine (US)), Kevin Pedro (Fermi National Accelerator Lab. (US)), Marco Giacalone (CERN), Phat Srimanobhas (Chulalongkorn University (TH)), Thiago Tomei Fernandez (UNESP - Universidade Estadual Paulista (BR))

10:45 AM ML-driven advances in Hadronic Tau Lepton Reconstruction and Identification at the CMS experiment

Hadronically decaying tau leptons are key signatures in precision measurements and searches for new physics at the LHC, including Higgs boson studies and scenarios beyond the Standard Model. Their reconstruction is challenging due to complex decay modes and large backgrounds from quark- and gluon-initiated jets.

This talk reviews recent advances in hadronic tau reconstruction and identification at the CMS experiment, with a focus on modern machine learning techniques. Significant progress has been achieved in offline tau identification using deep learning, particularly the latest DeepTau algorithm, which employs convolutional neural networks with domain adaptation to improve discrimination power and reduce data–simulation discrepancies. Alternative approaches based on jet reconstruction with graph neural networks and particle transformers are also discussed, and their Run 3 performance is compared.

At the trigger level, new machine-learning-based algorithms have been deployed in the high-level trigger to efficiently select hadronic tau signatures under the challenging Run 3 conditions of high pileup and strict latency constraints. Dedicated strategies for non-standard tau topologies are presented, including boosted, displaced, and low-transverse-momentum taus reconstructed in the Scouting data stream. Finally, recent machine-learning-based, data-driven methods for estimating jet→tau backgrounds are discussed, demonstrating improved accuracy and robustness across phase space.

Speaker: Paola Mastrapasqua (University of Notre Dame (US))

ICHEP26_Tau_Talk_PMastrapasqua.pdf

11:00 AM An enhanced track reconstruction for the CMS experiment at the HL-LHC

This talk presents the new phase-2 CMS baseline tracking strategy currently proposed for online event reconstruction, which can be similarly useful in offline reconstruction under the extreme pile-up conditions of the High-Luminosity LHC (HL-LHC). By unifying diverse algorithmic paradigms and integrating machine learning (ML) techniques into a coherent sequence, CMS can maintain high-efficiency and high-resolution tracking while improving the fake track rate and the computational performance, a crucial aspect especially for the HL-LHC. The approach combines GPU-optimized algorithms (Patatrack, LST) with vectorized CPU methods (mkFit), exploiting modern hardware to maximize throughput. This heterogeneous strategy reduces the resource requirements and enhances the physics reach by incorporating a global displaced track reconstruction and extending sensitivity to rare, interesting signatures, such as long-lived particles.

Speaker: Mario Masciovecchio (Univ. of California San Diego (US))

Mario-Masciovecchio.ICHEP-2026.CMS-Phase2-Tracking.pdf

11:15 AM Reconstruction of Charged Particles' Tracks with a Geometry-Agnostic and Heterogeneous Framework for HEP Experiments

The planned upgrades to the Large Hadron Collider for the HL-LHC era will gradually increase the nominal luminosity, aiming for peak values close to 5×10$^{34}$ cm$^{-2}$s$^{-1}$ in the ATLAS and CMS experiments. With higher luminosity, more proton–proton interactions will happen in each bunch crossing, with pileup reaching up to 200, making track reconstruction much more challenging.

To handle these conditions, several experiments have started updating parts of their track reconstruction software so it can run efficiently on different types of computing hardware. These efforts have shown good progress but usually stay within each experiment’s own software.

In this work, we present a standalone framework that can run on multiple backends—including CPUs, NVIDIA GPUs, and AMD GPUs, and reconstruct tracks in cylindrical tracking detectors used by various high-energy physics experiments. We evaluate both its physics performance and its computational behavior for different detector setups.

This project is an initial step toward a unified, experiment-independent reconstruction tool for HL-LHC-like detectors, able to use heterogeneous computing resources. The detector model is defined only by its usual components: a silicon tracking system, at least one calorimeter, and a muon subsystem.

Speaker: Breno Orzari (Centre National de la Recherche Scientifique (FR))

CylOn_ICHEP2026.pdf

11:30 AM Status of Data Processing for Space Astronomy Satellites at IHEP

Space astronomy satellites are indispensable for astrophysics, with data processing being the critical bridge from raw observations to scientific discovery. The Institute of High Energy Physics (IHEP) of the Chinese Academy of Sciences has been instrumental in developing and operating a fleet of key satellite missions, including HXMT, GECAM, SVOM, eXTP, CATCH, et al. The resulting petabyte-scale data volumes present significant challenges in processing efficiency and system sustainability. This report will represent IHEP's integrated response, outlining multiple satellites and the unique data processing characteristic, the development of a standardized, modular software framework designed to unify multi-mission processing, its current application progress, and the future roadmap toward a scalable, unified data processing platform.

Speaker: Shuang Wang (IHEP)

ICHEP 2026 -WANG SHUANG.pdf

ICHEP 2026 -WANG SHUANG.pptx

11:45 AM Computational Frontiers of the Fermilab Muon g-2 Experiment: Processing 20 Petabytes for Fundamental Precision

The Muon g-2 Experiment at Fermilab has recently concluded its analysis of the full dataset, achieving a landmark measurement of the muon's anomalous magnetic moment with a final precision of 127 parts per billion (ppb). Reaching this unprecedented level of precision required the acquisition and processing of over 20 petabytes of raw, reconstructed and simulated data, marking a significant computational challenge for a precision storage-ring experiment.
This talk presents the strategic evolution of the experiment’s computing infrastructure and the software innovations that enabled this high-precision measurement. We detail the end-to-end data workflow, from production and global data handling to final analysis, leveraging FermiGrid and Open Science Grid (OSG) through high-throughput computing (HTC) resources and tools. Key highlights include significant optimizations in the data processing chain that achieved an order-of-magnitude reduction in analysis turnaround time and a substantial increase in data throughput. We will discuss the challenges of maintaining bit-level stability and systematic control across massive datasets, the integration of large-scale Monte Carlo simulations, and the operational management strategies that ensured efficient resource utilization. These computational advancements were essential for the timely delivery of the final results and provide a robust roadmap for future high-precision experiments at the intensity frontier.

Speaker: Liang Li (Shanghai Jiao Tong University (CN))

ICHEP2026_Muon_g2_Computing_Liang_Li.pdf

12:00 PM DarkPACK: a code for computing squared amplitudes and dark matter observable

Determining the nature of dark matter is one of the most important goals of contemporary physics. Many codes have been written to tackle this problem; recently, the community began to favour more open-source solutions. DarkPACK is a recent and fully open-source tool for building C++ libraries capable of computing squared amplitudes for user-defined models. DarkPACK is conceived with the purpose of being user-friendly and easy to link with external codes. In this presentation, we shall showcase DarkPACK’s features, provide learning resources, give examples in how it could be linked with external codes — such as PYTHIA — and outline its development roadmap.

Speaker: Dr Marco Palmiotto (University of Oslo)

ichep-2026.pdf

10:45 AM → 12:30 PM Accelerator: Physics, Performance, and R&D for Future Facilities

Convener: Wei Lu (Institute of High Energy Physics)

10:45 AM Advances in High Field HTS Magnet Technology for the Next-generation Particle Accelerators

The Institute of High Energy Physics (IHEP) of the Chinese Academy of Sciences is pursuing the advanced high field HTS superconducting magnet technology for the next-generation particle accelerators. Significant progresses have been achieved in the past years: world’s first achievement of over 14 T dipole field in the aperture with ReBCO insert coils at 4.2 K. The engineering current density of the Iron Based Superconductor (IBS) has been continuously increased significantly in collaboration with the Institute of Electrical Engineering (IEE) of the Chinese Academy of Sciences; the IBS model solenoids reached 49 A stable operating current at 35 T background field; the transposed IBS cable reached a quench current of 7100 A, and the quench propagation speed of the IBS conductor has also been experimentally measured, showing its superiority over traditional HTS conductors: easy to protect during quench, better mechanical properties and much lower cost. The talk will present the latest promising progress and discuss the possible solutions for the issues to be solved in the next years.

Speaker: Prof. Qingjin Xu (Institute of High Energy Physics, Chinese Academy of Sciences)

HF Magnet Program-Aug 2026.pdf

HF Magnet Program-Aug 2026.pptx

11:00 AM Plasma Accelerator toward TeV Horizon (PATH): a China effort for future collider

Plasma accelerator has made great progresses in the past few decades, with a promise to significantly reduce the size and cost of future large scale high energy accelerators. PATH ( Plasma Accelerator towards TeV Horizon) is a China initiated research effort toward future plasma based linear colliders. In this talk, the plans for PATH and research activities will be introduced, including detailed design study on high energy plasma based injectors for CEPC/FCC-ee, collider quality positron acceleration schemes, and experimental progresses of a dedicated research platform for electron/positron acceleration within IHEP.

Speaker: Wei Lu (Institute of High Energy Physics)

PATH-weilu-ICHEP26.pdf

PATH-weilu-ICHEP26.pptx

11:15 AM Plasma Wakefield Accelerators for Particle Physics: Status, Challenges, and Outlook

Plasma wakefield acceleration provides accelerating gradients orders of magnitude beyond conventional radio-frequency technology and is a promising approach for future particle physics accelerators.This talk reviews the current status of plasma-based accelerators, their challenges and highlights the first near-term applications that are becoming feasible, including compact accelerator stages, test facilities, and advanced light-source concepts. These early applications play a critical role in validating performance, reliability, and operational maturity. The presentation then addresses the pathway towards collider-relevant energies. Achieving energies beyond 10 GeV requires either staged plasma acceleration or proton-driven schemes enabling single-stage acceleration in long plasma sources. The status of international R&D programmes, technical readiness, and emerging collider parameter sets is shown.

Speaker: Edda Gschwendtner (CERN)

2026-07-31-ICHEP-PWFA4PP.pdf

2026-07-31-ICHEP-PWFA4PP.pptx

11:30 AM CEPC Machine Detector Interface(MDI) and Beam Induced Background Study

The machine-detector interface (MDI) issues are one of the most complicate and challenging topics at the Circular Electron Positron Collider (CEPC). Comprehensive understandings of the MDI issues are decisive for achieving the optimal overall performance of the accelerator and detector. The machine will operate at different beam energies, therefore, a flexible interaction region design will be plausible to allow for the large beam energy range. The design has to provide high luminosity that is desirable for physics studies, but keep the radiation backgrounds tolerable to the detectors and other related sub system components. This requires careful balance of the requirements from the accelerator and detector sides.
In this paper, the latest design of the CEPC MDI and the study status of the beam induced backgrounds based on CEPC Technical Design Report (TDR) of the accelerator and the reference detector will be presented, covering the design of the beam pipe and whole IR, the estimation of beam induced backgrounds, the mitigating schemes, and also our plan towards the EDR of accelerator.

Speaker: Dr Dou Wang (IHEP)

CEPCMDI_ICHEP26-v3.pdf

CEPCMDI_ICHEP26-v3.pptx

11:45 AM IHEP high power and high efficiency klystron develpment

The CEPC collider requires approximately 60 MW of beam power, making RF source efficiency a critical factor for overall project cost effectiveness. High-power, high-efficiency klystrons are therefore attractive RF sources due to their superior efficiency compared with other amplifiers. At IHEP, a high-efficiency 650 MHz continuous-wave klystron prototype completed in 2024 achieved a continuous-wave output power of 803 kW with an efficiency of 78.5%. In parallel, a multi-beam klystron targeting efficiencies above 80% is under development and scheduled for high-power testing in 2026. In addition, an energy-recovery klystron with a target efficiency exceeding 85% is being fabricated and will be high-power tested by the end of 2026. For the CEPC linac, high-power S-band and C-band 80 MW klystrons are also under development at IHEP; the S-band design efficiency exceeds 55%, and two prototype variants are planned for testing in early 2026.

Speaker: Prof. Zusheng Zhou (Institute of High Energy Physics(IHEP))

IHEP high power and high efficiency klystron develpment.pdf

IHEP high power and high efficiency klystron develpment.pptx

12:00 PM AWAKE: Advancing Proton-Driven Plasma Wakefield Acceleration toward Particle Physics Applications

The Advanced WAKEfield Experiment (AWAKE) at CERN has evolved from a proof-of-concept experiment into an R&D platform for proton-driven plasma wakefield acceleration, targeting first particle physics applications in the 2030s. During CERN’s Long Shutdown 3 (2026–2028), AWAKE will be upgraded to demonstrate the acceleration of electrons to energies of up to 10 GeV in a single 10 m plasma source, while controlling beam quality and addressing the scalability of the process. Building on results demonstrating controlled self-modulation of long proton bunches in plasma and the generation of strong wakefields, the experimental programme starting in 2029 will focus on the external injection of a 150 MeV, 100 pC, 200 fs electron bunch into a 10 m accelerator plasma. Electron acceleration to energies up to 10 GeV with percent-level relative energy spread will be demonstrated. In a subsequent phase, a 20 m long accelerator plasma will be used to further validate scalability. To support this programme, scalable discharge and helicon plasma sources are being developed, enabling plasma lengths extendable to tens and ultimately hundreds of meters, as required for particle physics applications. The AWAKE roadmap, key challenges, and relevance for future plasma-based accelerators are presented.

Speaker: Edda Gschwendtner (CERN)

2026-07-31-ICHEP-AWAKE.pdf

2026-07-31-ICHEP-AWAKE.pptx

12:15 PM ESSnuSBplus: status and future plans

The European Spallation Source neutrino Super Beam, ESSnuSB, is a second-generation long baseline project that aims to measure the CP violation in the lepton sector with high precision at the second neutrino oscillation maximum. ESSnuSB will be based in Europe and will benefit from the high power of the European Spallation Source (ESS) LINAC in Lund-Sweden to produce the world’s most intense neutrino beam. The second phase, called ESSnuSBplus, aims to measure the neutrino-Nucleus cross-section in the low energy range of 0.2-0.6 GeV using a Low Energy nuSTORM and a Low Energy Monitored Neutrino Beam facilities. Additionally, with the low energy neutrinos from these facilities, ESSnuSBplus will be also capable of studying the sterile neutrinos.
In this talk, we will shed more light on the design study on the detector, currently in progress, its subsystems design and the expected physics reach.

Speaker: Natalia Milas (European Spallation Source)

ICHEP2026_Milas.pdf

ICHEP2026_Milas.pptx

10:45 AM → 12:30 PM Sustainability

Conveners: Veronique Boisvert (Royal Holloway, University of London), Ruth Pottgen (Lund University (SE)), Alberto Pace (CERN), Heinrich Schindler (CERN), Dr Maksym Titov (IRFU, CEA Saclay, Université Paris-Saclay (FR)), Sandro Fonseca (Universidade do Estado do Rio de Janeiro (BR))

10:45 AM Discussion

Speaker: Dr Maksym Titov (IRFU, CEA Saclay, Université Paris-Saclay (FR))

Sustainability-Parallel-Session_Discussion_01082026.pdf

Sustainability-Parallel-Session_Discussion_01082026.pptx

10:45 AM → 12:30 PM Strong Interactions and Hadron Physics

Conveners: Victor Goncalves, Victor Gonçalves (Universidade Federal de Pelotas)

10:45 AM Recent results of Baryon electromagnetic form factors at BESIII

At BESIII, the electromagnetic form factors (EMFFs) and the pair production cross sections of various baryons have been studied. The proton EMFF ratio |GE/GM| is determined precisely and line-shape of |GE| is obtained for the first time. The recent results of neutron EMFFs at BESIII show great improvement comparing with previous experiments. Cross sections of various baryon pairs are studied from their thresholds. Anomalous enhancement behavior on the baryon pair are observed. The relative phase of EMFFs for $\Lambda$ and $\Sigma^+$ are measured in a wide energy interval and indicates non-zero polarization of hyperons.

Speaker: Dr Yuzhi Che

ICHEP2026.pdf

11:00 AM Partonic Structure of the Pion in Minkowski Space: PDFs and TMDs

In this talk, I will present results on the pion structure derived from a dynamical model based on the Bethe–Salpeter equation formulated in Minkowski space. To this end, we employ the Nakanishi integral representation for the Bethe–Salpeter amplitude. The interaction kernel incorporates effective quark and gluon masses, as well as a scale parameter associated with the extended quark–gluon vertex. Within this model, we compute the pion weak decay constant, the valence component probability, the light-front momentum distributions, and the distribution amplitudes. We also obtain the probability densities in both light-front momentum space and in the three-dimensional space defined by the Cartesian product of the covariant Ioffe time and the transverse coordinates. We also calculate hadronic observables as the pion electromagnetic form factor, the parton distribution function and the unpolarized transverse momentum distribution. We compare our results with available experimental data and with other theoretical models.

Speaker: Prof. wayne de Paula (Instituto Tecnologico de Aeronautica)

ICHEPdePaula.pdf

11:15 AM On the Analytic Structure of the $Q^2$ Dependence of PDFs

Parton distribution functions play a pivotal role in hadron collider phenomenology. They are nonperturbative quantities extracted from fits to available data, and their scale dependence is dictated by the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi evolution equations. In this article, we discuss machine-assisted strategies to efficiently compute parton distribution functions (PDFs) explicitly incorporating the scale dependence. Analytical approximations to the PDFs as functions of x and Q2, including up to next-to-leading-order effects in quantum chromodynamics, are obtained. The methodology is tested by reproducing the herapdf2.0 set and implementing the analytical expressions in benchmarking codes. It is found that the computational time cost of evaluating the distributions is reduced by ∼50%, while the precision of the simulations stays well under control.

Speaker: DAVID FRANCISCO RENTERIA ESTRADA (IFIC UV-CSIC)

2025.09.05_ICHEP2026_v2.pdf

11:30 AM Lepton-ion DIS at the LHC: estimating the impact of the nuclear effects

Recent studies have shown that the far-forward physics program of the LHC can be useful to probe the nuclear structure with GeV-TeV neutrinos and muons. In particular, these studies indicate that the measurement of muon-ion and neutrino-ion cross-sections by the same experiment is feasible. In Ref. [1], we investigate the impact of nuclear effects on the muon-tungsten ($\mu$$W$) and neutrino-tungsten ($\nu$$W$) deep inelastic scattering events at FASER$\nu$ and its proposed upgrade FASER$\nu$2. We estimate the rates associated with the inclusive cross-sections and for events with a charm tagged in the final state considering different parameterizations for the nuclear parton distribution functions. These results point out that muon and neutrino-induced interactions probe complementary kinematical ranges and that a simultaneous analysis of associated events will allow to test the universality (or not) of the nuclear effects. Moreover, we propose the study of the ratio between the charm tagged and inclusive events in order to discriminate between the distinct modeling of the nuclear effects at small-$x$. Our results indicate that a future experimental reconstruction of $\mu$$W$ and $\nu$$W$ DIS events at the LHC is a promising way to improve our understanding of nuclear effects and decrease the current uncertainties in parton distribution functions.

Speaker: Reinaldo Francener (Universidade Estadual de Campinas)

NuclearEffects_ICHEP.pdf

11:45 AM Renormalon-chain contributions to two-point correlators of nonlocal quark currents and light-meson distribution amplitudes

We calculate the two-point massless QCD correlator of nonlocal composite vector quark currents with chains of fermion one-loop radiative corrections inserted into the gluon lines. The correlator depends on the Bjorken fraction $x$ related to the composite current and, in the large-$\beta_0$ approximation, provides the dominant contributions in each order of perturbation theory. Under this approximation, these contributions govern the endpoint behavior of the leading-twist distribution amplitudes of light mesons within the framework of QCD sum rules. Building on these results, we analyze the endpoint behavior of the distribution amplitudes for the pion and longitudinally polarized $\rho$ mesons, deriving inequalities for their moments.

Speaker: Dr Nikolay Volchanskiy (Bogoliubov lab of theoretical physics, Joint institute for nuclear research)

2026 ICHEP - volchanskiy n.pdf

12:00 PM Drell - Yan angular distributions at forward rapidities in the color-dipole S-matrix framework

The dilepton production at forward rapidities in hadronic collisions at the LHC energies is considered and the helicity density matrix elements of gauge bosons that enter the Drell--Yan angular coefficients associated with the gauge boson decay ($G = \gamma^*, Z^0, W$) are derived using the color-dipole $S$ - matrix framework.In this work, we study the angular distributions of forward dilepton pairs ($\ell_1 \bar{\ell}_2$) produced at LHC energies. Building upon our recent results on the general formulae for the inclusive electroweak gauge boson production at forward rapidities using the S-matrix framework, we generalize existing formalisms for low-mass Drell–Yan production at forward rapidities using a hybrid approach to the cases in which the dilepton system originates from a $Z^0$ or a $W^{\pm}$ gauge boson.Using the color-dipole $S$-matrix framework, we derive the complete set of density-matrix elements required for the determination of the dilepton angular coefficients. We show that these quantities depend linearly on the target unintegrated gluon distribution (UGD), making them sensitive probes of QCD dynamics at small-$x$, and that the formalism is applicable to both $pp$ and $pA$ collisions. In addition, the Lam--Tung relation is discussed.

Speaker: Dr Yan Bandeira (University of São Paulo)

Yan_Talk_ICHEP_2026.pdf

10:45 AM → 12:30 PM Beyond the Standard Model

Convener: Dr Louie Dartmoor Corpe (Laboratoire de Physique Clermont Auvergne (LPCA))

10:45 AM Sensitivities to $\nu$SMEFT interactions in the agnostic regime

The extension of the standard model with right-handed neutrinos is motivated by the observation of neutrino oscillations and masses. These lead to heavy neutrino states possibly in the electroweak scale or above, which could be impacted by new high-scale weakly coupled physics. These interactions can be studied with a systematic tool like the neutrino-extended standard model effective field theory νSMEFT.

We present the first results obtained explicitly by recasting existing LHC experiments results on searches for heavy neutral leptons in $p ~p$ collissions, now in the context of an agnostic treatment of the effective field theory, where we include the simultaneous effect of different dim-6 effective operators. This agnostic approach takes into account possible operator-mixing and interference effects, and captures the rich phenomenology of the heavy neutrino effective interactions. We compare these results with prospects obtained for future $e^{+}e^{-}$ and $e^{-} ~p$ colliders like the FCC-ee and the LHeC.

Speaker: Lucía Duarte

ichep26_LuciaDuarte.pdf

11:00 AM Top quark differential distributions in the SMEFT

We discuss top quark processes, in particular $tW$ production and top-antitop pair production, as probes of dimension-6 Standard Model Effective Field Theory (SMEFT). We calculate top-quark double differential distributions in transverse momentum and rapidity, and we perform SMEFT fits at LO, NLO and, by adding second-order soft-gluon corrections, at approximate NNLO.

Speaker: Prof. Nikolaos Kidonakis

Kidonakis-smeft.pdf

11:15 AM Model-independent searches and anomaly detection at the CMS experiment

In the absence of direct evidence for new physics in targeted searches, model-independent strategies are becoming increasingly important. In this talk, we present recent results of model-agnostic searches that are facilitated by advanced machine learning techniques, opening a new avenue for unbiased detection of potential new physics signals.

Speaker: Tamas Almos Vami (Univ. of California Santa Barbara (US))

20260801_ICHEP_AnomalyDetection.pdf

11:30 AM The SMEFT way to New Physics

SMEFT is a powerful framework to explore imprint of New Physics when the mass of the new states is out of experimental reach. In recent years, significant effort has been devoted to performing global fits in order to correlate deviations observed across different measurements. However, the large dimensionality of the parameter space can limit the sensitivity of this approach and obfuscate the identification of potential signals. In this talk, I will discuss how to move beyond traditional global fits by adopting a Bayesian model selection framework combined with genetic algorithms, enabling a more effective detection of deviations from the SM and a more accurate characterization of the underlying new physics scenario in the context of future lepton colliders.

Speaker: Simone Tentori (UCLouvain)

Tentori_ICHEP2026_SMEFT.pdf

11:45 AM Sensitivity of the Equivalent EDM to SMEFT

The Electric Dipole Moment of the electron (eEDM) is typically investigated in experiments using paramagnetic molecules. However, the physical observable in these searches consists of a linear combination of CP-violating interactions, rather than the eEDM alone, which is commonly referred to as the equivalent EDM of the system. Assuming the presence of new CP-odd physics from heavy degrees of freedom, I parametrize its effects within the Standard Model Effective Field Theory (SMEFT) framework. In this talk, I will present the contributions to the full low-energy direction probed by EDM searches, focusing on leading-order effects at dimension six and one-loop level, while also discussing selected two-loop and dimension-eight contributions. I will highlight that eEDM experiments are sensitive to a broader class of SMEFT operators than previously recognized.

Speaker: Nicola Valori (University of Valencia & IFIC)

ICHEP_NV.pdf

12:00 PM SUSY meets SMEFT

We will discuss the complete one-loop matching of the Minimal Supersymmetric Standard Model (MSSM) onto the Standard Model Effective Field Theory (SMEFT), considering the most general case for the MSSM with conserved R-parity, which has 124 free parameters. The matching is performed with the Matchete package, which integrates out all superpartners at once with non-degenerate masses, while also retaining the most general flavor structure. Our results include all correlations among the different SMEFT Wilson coefficients that are governed by supersymmetry and thus provide a basis for future systematic and global studies of the MSSM parameter space employing EFT methods. Furthermore, we will present a minimal phenomenological example.

Speaker: Andre Lessa (CCNH - Univ. Federal do ABC)

ICHEP2026_MSSM2EFT.pdf

10:45 AM → 12:30 PM Operation, Performance and Upgrade of Present Detectors

Convener: Sarah Porteboeuf (Université Clermont Auvergne (FR))

10:45 AM R&D of Power Over Fiber in harsh environments and its novel application for the DUNE Photon Detection System

The Deep Underground Neutrino Experiment (DUNE) is a next generation long-baseline neutrino experiment that will send an intense beam of neutrinos through two detector complexes: a near detector complex located at Fermilab (Chicago), and a far detector complex located ~1.5 km underground at Sanford Underground Research Facility (SURF) in South Dakota.
One of the DUNE far detector (FD) modules will employ the Vertical Drift (VD)
Technology, which will vertically drift the ionized electrons from the cathode plane suspended at the mid-height of the active volume of the cryostat. The photon detection system (PDS) will be installed along the cathode and behind the field cage to increase the photon detection coverage. Due to the high voltage (~300 kV) present at the cathode, conventional copper cables cannot be used to power the photon detectors. Therefore, Power-over-Fiber (PoF) technology will be deployed to power the PDS based on optical power transmission over optical fibers. This talk presents the R&D campaign on different PoF components under harsh environments and its novel application in the DUNE PDS.

Speaker: David Martinez Caicedo (South Dakota School of Mines and Technology)

ICHEP2026_PoF_DUNE_MartinezCaicedo.pdf

11:00 AM CMS Phase-2 Outer Tracker for the HL-LHC Upgrade

In the next few years, during Long Shutdown 3, the LHC will be upgraded to the High-Luminosity LHC (HL-LHC). The HL-LHC will run at a luminosity at least five times higher than the nominal LHC luminosity, which will lead to an unprecedented set of collision data, but will also create major challenges for the detectors in terms of pile-up and radiation level. To cope with the increased luminosity, the CMS detector will be substantially upgraded. This includes a replacement of the complete CMS tracker. The new Phase-2 Inner and Outer Tracker will rely on silicon pixel and strip sensors with increased radiation hardness and spatial resolution.

The Outer Tracker is built from radiation‑hard $p_T$-modules, each containing two closely spaced sensors. Front‑end ASICs perform on‑detector clustering and form “stubs” by correlating hits in the two sensors, selecting candidates compatible with tracks above a programmable $p_T$ threshold. PS (pixel–strip) modules equip the inner high‑occupancy region, and 2S (strip–strip) modules the outer radii, enabling efficient real‑time L1 track finding at up to O(200) interactions per bunch crossing. This contribution summarizes the Outer Tracker layout, module and electronics design, on‑detector stub formation, and recent progress in module production and integration.

Speaker: Nina Laura Hoflich (Rheinisch Westfaelische Tech. Hoch. (DE))

ichep2026_hoeflich.pdf

11:15 AM Super conductor magnet of Multi-Purposed Detector MPD for NICA complex. Technical parameters and infrastructure of the magnet.

Multipurpose detector (MPD) be used for studying hadrons, electrons, and photons generated in heavy ion collisions at energies provided by the NICA collider of the Joint Institute for Nuclear Research (Dubna). Magnet have cylindrical form each dimension is 6,5 m of circumscribed diameter and 9 m length. A constituent part of the MPD is a superconducting solenoid magnet with a superconducting NbTi coil in pure aluminum matrix. Around solenoid installed steel yoke by 28 barrels. Operation field from 0.2 T to 0.57 T in an aperture to ensure the transverse momentum resolution within the operation range at NICA complex.
Operation temperature of the magnet is 4.5K. A variety of engineering systems have been developed for the safe operation of the magnet, including an electric power supply system, cryogenic cooling, superconducting cable protection system and output of stored energy, a suspension system and magnetic force control. Currently, the magnet is undergoing magnetic field map measurements and selection of optimal currents.
The report will present the design and features of magnets of such sizes, start up of it step by step, the operating parameters of engineering and protection systems, a field mapping device in the magnet's aperture, the results of test operation.

Speaker: Konstantin Mukhin

MPD magnet JINR - Natal Brazil.pptx

11:30 AM ATLAS Upgrades for the High Luminosity LHC - Status and Perspectives

While the ongoing Run-3 data-taking campaign will provide more than 500 fb-1 of integrated luminosity, the HL-LHC will allow the collection of more than 3 ab-1 of data. This unprecedented data sample will allow ATLAS to perform several precision measurements to constrain the Standard Model in yet unexplored phase-spaces, in particular in the Higgs sector.
It is fundamental to upgrade the detector to cope with the challenging experimental conditions that include huge levels of radiation and a mean number of interaction (pile-up) of 140-200 per event. The ATLAS upgrade comprises a new all-silicon tracker with extended rapidity coverage and a redesigned trigger and data acquisition system for the calorimeters and muon systems.
Finally, a new subsystem called High Granularity Timing Detector will aid the track-vertex association in the forward region by incorporating timing information into the reconstructed tracks. A precise determination of the delivered luminosity will be achieved by collecting the information from several detector systems using different and complementary techniques. This presentation will describe the ongoing ATLAS detector upgrade status and the main results obtained with the prototypes, giving a global view of the whole upgrade project.

Speaker: Pavel Starovoitov (UoS)

ps_ICHEP2026_Upgrade.pdf

11:45 AM Thermal Stabilization System for the MPD Time Projection Chamber at NICA: Status and Challenges

The time projection chamber (TPC) requires its working gas to be thermally stabilized within ±0.1 K to preserve a uniform electron drift velocity across the drift volume. This is achieved with a leakless water-circulation system (LCS), where the coolant pressure is kept below ambient so that any breach draws air inside rather than leaking water onto electronics. A key design challenge is the narrow pressure budget between leaks (>1 atm) and cavitation (<0.1 atm), which is further reduced due to viscous friction and hydrostatic pressure due to height of the detector. The LCS was engineered using a fluid network model based on 1D Navier-Stokes equations on the graph edges (pipe segments), with conservation of mass and momentum enforced at the nodes to represent junctions and manifolds.
Laboratory tests demonstrated PID-controlled temperature non-uniformity within ±0.08 K. Precision thermometry is provided by 260 channels, using per-channel correction maps and polynomial sensor calibration to reach ±0.03 K accuracy. For gas-line conditioning, a shell-and-tube heat exchanger reduced the gas-to-water temperature difference by 10-15 times over 20-200 L/min gas flow. The TPC LCS is planned to be commissioned in the first phase of the MPD detector in year 2026.

Speaker: Alexander Fedotov (Joint Institute for Nuclear Research)

ICHEP2026.pdf

12:00 PM ATLAS toward the High Luminosity era: challenges on electronic systems

While the ongoing Run-3 data-taking campaign will provide more than 500 fb-1 of integrated luminosity, the HL-LHC will allow the collection of more than 3 ab-1 of data. A major upgrade of both detector and electronics is ongoing in ATLAS.
A new all-silicon tracker will replace the current inner detector, and a high granularity timing detector will be added. The upgraded detector will have an unprecedented output data rate of up to 200 TB/s.
Real-time processing of this large data volume is extremely challenging. New sets of both front-end and back-end electronics are required for all sub-detectors. A new trigger and data acquisition (TDAQ) system will be implemented with a single-level hardware trigger that features a maximum rate of 1 MHz and 10 μs latency.
These events will be further processed by software algorithms and selected events will be stored permanently at a rate of 10 kHz for offline analysis.
Here the challenges and design of front-end and back-end electronics for various subdetectors and the global ATLAS TDAQ system will be presented. The latest results from different ASICs and board prototypes, system integration, and production will also be discussed.

Speaker: Nicolas Morange (IJClab)

2026-08-01_ATLASElectronicsChallenges.pdf

12:15 PM The Fast Forward Detector of the MPD experiment

The Fast Forward Detector (FFD) is a subsystem of the MPD,
one of the two heavy ion collision experiments of the NICA collider at JINR. The FFD provides fast interaction trigger with determination of interaction point position and serves as a start detector for the time-of-flight system of the experiment. The detector consists of two arrays of Cherenkov counters placed on both sides of the interaction point. Fast determination of the interaction point position is based on time
difference between the pulses in two arms. The detector design, electronics and other FFD subsystems are described in this report. Also, FFD characteristics obtained in test measurements with beam, cosmic rays, and laser are presented.

Speaker: Sergey Sedykh

ICHEP2026_Sedykh_FFD_of_MPD.pdf

10:45 AM → 12:30 PM Quark and Lepton Flavor Physics

Conveners: Dmytro Kovalskyi (Massachusetts Inst. of Technology (US)), Sandra Amato (Univ. Federal do Rio de Janeiro (BR))

10:45 AM Latest results from the MEG II experiment

The search for charged lepton flavor violation in muon decays is one of the most prominent probes for new physics, with unobservable rates predicted by the Standard Model and an almost unavoidable enhancement in its extensions, up to the sensitivity of the current experiments. The MEG II experiment at PSI searches for the $\mu \to e \gamma$ decay, with a projected sensitivity down to $6 \times 10^{-14}$ on the branching ratio, an improvement of one order of magnitude with respect to the previous experiment, MEG. In 2025, the MEG II collaboration published a search for $\mu \to e \gamma$ on a sample of data corresponding to $\sim 25\%$ of the expected final statistics. An upper limit of $BR(\mu \to e \gamma) < 1.5 \times 10^{-13}$ at $90\%$ C.L. was obtained, which improves the MEG limit by a factor of nearly 3. We will present the current status of the experiment, the latest results on the $\mu \to e \gamma$ search and the status and prospects of searches for other muon exotic decays with the MEG-II detector.

Speaker: Prof. Toshinori Mori (University of Tokyo (JP))

MEG_II_mori_r5.pdf

11:00 AM Status of the COMET Experiment at J-PARC

The COMET experiment at J-PARC will search for the muon-to-electron conversion process in a muonic aluminium atom without the emission of neutrinos (mu- N -> e- N). Such a transition violates charged lepton flavor conservation and does not occur within the Standard Model framework, making it a powerful probe for physics at energy scales far beyond direct collider reach. The experimental programme targets a level of single-event sensitivity never before attained in searches for this process. The COMET experiment is being realised in a staged approach. The initial stage, COMET Phase-I, is designed for detailed studies of the high-intensity pulsed muon beam, quantitative evaluation of background sources, and an early search for conversion electrons with a sensitivity of O(10^-15). In preparation for Phase-I operation, the complete set of superconducting solenoids has been installed in the experimental hall. To suppress detector hit rates, detailed simulations have been performed to optimize the muon beam line, leading to the design, fabrication, and installation of dedicated muon collimators. A full-chain DAQ system has been commissioned, and cosmic-ray tests of the Cylindrical Drift Chamber are currently in progress. Detector integration design, the development of the cosmic-ray veto counters, and the construction of beam measurement detectors are also actively underway. The COMET Phase-I experiment is planned to start with approximately one-tenth of the full beam intensity, with beam operation foreseen to begin in early 2028. This presentation will report on the current status of the experiment, highlight recent progress toward Phase-I data taking, and outline the prospects toward the full-sensitivity search.

Speaker: Yohei Nakatsugawa

ICHEP2026_COMET.pdf

11:15 AM Toward a future $\mu \to e \gamma$ experiment

Searches for charged lepton flavor violation in the muon sector stand out among the most sensitive and clean probes for New Physics. Currently, $\mu^+ \to e^+ \gamma$ experiments provide the best constraints for a wide range of models while new experiments investigating the processes of $\mu^+ \to e^+e^+e^-$ and $\mu \to e$ conversion in the nuclear field are anticipated to reach comparable or higher sensitivities.
The High-Intensity Muon Beam (HIMB) facility at PSI (CH), which is expected to deliver muon beam intensities up to two orders of magnitude higher than the existing beam lines, offers a unique opportunity to significantly enhance the sensitivity of $\mu^+ \to e^+ \gamma$ searches. The discovery potential could be substantially boosted and a sensitivity comparable to that of all the other projects could be reestablished, which is essential for discriminating among competing new-physics scenarios should an observation occur in any of the channels.
We will present a plan for a future $\mu^+ \to e^+ \gamma$ experimental program at HIMB, aiming at improving, within the next decade, the sensitivity of the $\mu^+ \to e^+ \gamma$ search by more than one order of magnitude relative to the expected final result of the current leading experiment, MEG II.

Speaker: Francesco Renga (INFN Roma)

renga_ICHEP2026.pdf

11:30 AM Fundamental Symmetries and lepton flavour violation in CMS

This overview talk covering an amount of analysis within BPH that involve CP violation measurements and lepton flavour violation measurement. The analysis included are mostly using the Run3 data.

Speaker: Eliza Melo (Universidade do Estado do Rio de Janeiro (BR))

emc_ICHEP2026_final.pdf

11:45 AM Searches for charged LFV at LHCb

Charged Lepton Flavour Violation (cLFV) is highly suppressed in the Standard Model, making it a sensitive probe of physics beyond it. The LHCb experiment has performed dedicated searches for cLFV in both semileptonic b-hadron decays and purely leptonic tau decays, focusing on the $\tau^-\to\mu^-\mu^+\mu^-$ decay. These searches provide valuable constraints on a wide range of new physics scenarios and showcase the sensitivity of LHCb to rare $\tau$ processes. In this talk, recent LHCb results on cLFV searches in $\tau$ and $b$-hadron decays are presented.

Speaker: Lisa Fantini (INFN, Perugia (IT))

cLFV_Fantini.pdf

12:00 PM Searches for lepton-flavor violation in $\tau$ decays at Belle and Belle II

The Belle and Belle II experiments have collected a $1.6~\mathrm{ab}^{-1}$ sample of $e^+e^-$ collision data at center-of-mass energies near the $\Upsilon(nS)$ resonances. This sample contains approximately 1.3 billion $e^+e^-\to \tau^+\tau^{-}$ events, which we use to search for lepton-flavor violating decays. We present searches for the decays $\tau \to \mu\gamma$, $\tau \to \ell\eta$, $\tau\to \ell\pi^0$, and $\tau^-\to \ell^-\alpha$, where $\ell = e$ or $\mu$ and $\alpha$ is an invisible scalar particle.

Speaker: Petar Rados

TauLFV_Belle2_ICHEP2026_Petar_Rados_v1.pdf

12:15 PM Neutrino mass implications for U(2) flavor models

We present the Majorana neutrino mass model based on the U(2) flavor symmetry that is spontaneously broken. We introduce a minimal set of spurions, stemming from a U(2) doublet and a triplet flavon fields. We consider the vacuum structure of the theory and find the pattern of flavour breaking reproduces the observed neutrino mixing pattern and the mass splittings. Furthermore, we find lower bounds on the lightest neutrino mass and neutrinoless double β decay rate. We outline a UV complete model that radiatively completes the Weinberg operator at two-loop level by introducing flavored scalars and extending the flavor symmetry also to quarks.

Speaker: Dr Nejc Košnik (J. Stefan Institute, University of Ljubljana)

Kosnik-ICHEP-NuMassImp.pdf

10:45 AM → 12:30 PM Heavy Ions

Convener: Marcelo Gameiro Munhoz (Universidade de Sao Paulo (USP) (BR))

10:45 AM System-size dependence of charged-particle production at both mid and forward pseudorapidity with ALICE

Particle production at LHC energies arises from the interplay between hard and soft QCD processes and is sensitive to non-linear QCD evolution in the initial state. In July 2025, the LHC delivered short light-ion runs, pO, OO, and Ne--Ne collisions, providing a unique opportunity to bridge the gap between proton--proton and heavy-ion collisions. These systems allow us to study and investigate how nuclear geometry and system size influence the mechanisms of underlying particle production. In this talk, we present new measurements of charged-particle pseudorapidity densities ($\mathrm{d}N_\mathrm{ch}/\mathrm{d}\eta$) in light-ion collisions, at both mid and forward rapidities, and compare them with earlier results from pp and Pb$-$Pb collisions. The results will be compared with various theoretical models based on different initial interactions, e.g., to what degree the nucleon/nuclei interact as dilute (partons) or dense (Color Glass Condensate-like) fields.

Speaker: Marta Urioni (Universita e INFN Trieste (IT))

ICHEP_v4.pdf

11:00 AM Overview of PHENIX Heavy Flavor Results

PHENIX was one of the main experiments of the RHIC program with a broad heavy flavor program. The first observations of heavy flavor binary scaling, quark mass-dependent energy loss, $J/\psi$ suppression, and charmed hadron flow are some of the measurements that profoundly impact our understanding of the quark-gluon plasma with significant consequences for the LHC program. Despite PHENIX not having operated for the last ten years, new results from its heavy flavor program continue to appear, such as a comprehensive study of multiplicity and rapidity gap-dependent $J/\psi$ yields in p+p and $p$+Au collisions. This talk will cover the impact of the PHENIX heavy flavor program over the years and will present details of the most recent results.

Speaker: Cesar Luiz Da Silva (Los Alamos National Laboratory (US))

ICHEP-HF_PHENIX.pdf

ICHEP-HF_PHENIX.pptx

11:15 AM Quarkonia production in association with hadronic activity in pp collisions with ALICE

Measurements of quarkonium production in association with hadronic activity provide important constraints on heavy-flavor production mechanisms and quarkonium formation in high-energy hadronic collisions. The study of $\mathrm{J}/\psi$ production inside jets provides direct access to the fragmentation of high-energy partons into quarkonium states. $\mathrm{J}/\psi$-in-jet observables are sensitive to parton shower dynamics and enable discrimination between different quarkonium production mechanisms. Measurements of prompt and non-prompt $\mathrm{J}/\psi$ production as a function of event multiplicity provide insight into the correlation between heavy-flavor production and the underlying event in pp collisions. The separation of the two components allows the study of charm and beauty production in different QCD environments. These observables offer important constraints on multi-parton interactions and heavy-quark production mechanisms in high-multiplicity events. In this contribution, measurements of $\mathrm{J}/\psi$ production inside reconstructed jets, including the separation of prompt and non-prompt contributions, as well as prompt and non-prompt $\mathrm{J}/\psi$-hadron azimuthal correlations and event activity in pp collisions at $\sqrt{s}$ = 13 TeV are presented. Furthermore, measurements of the $\mathrm{J}/\psi$ energy-energy correlator (EEC) are presented.

Speaker: Yazhen Lin (Central China Normal University CCNU (CN))

ICHEP2026_yazhen.pdf

11:30 AM Fixed-target measurements at LHCb

Thanks to the possibility to inject gas into the LHC beam pipe while high-energy proton or ion beams circulate, the LHCb experiment has the unique capability to function as the as-of-today highest-energy fixed-target experiment. The resulting beam-gas collisions cover an unexplored energy range that is above previous fixed-target experiments, but below RHIC or LHC collider energies. We will present recent results and new developments from the beam-gas fixed-target collisions at LHCb, with a focus on the first results from the novel light-nuclei identification techniques which widen the rich programme of measurements of QCD and astrophysics interest. Also, using the diverse fixed-target data samples collected by the LHCb experiment, it is possible to study the influence of nuclear geometry on final-state particle correlations by comparing targets with different shapes. This contribution presents recent results on collective flow measurements in heavy-ion fixed-target collisions, including PbNe and PbAr, showing a strong influence of the nuclear geometry, predicted by the latest theoretical calculations.

Speaker: Federica Fabiano (IJCLab (CNRS/IN2P3))

ICHEP26_Fabiano_v2.pdf

11:45 AM Quarkonia production and flow in light-ions collisions with ALICE

Quarkonium production has been considered one of the golden probes to study the quark-gluon plasma (QGP). In fact, the early production of heavy quarks makes quarkonia an ideal tool to investigate the evolution of the hot and dense medium produced in ultra-relativistic heavy-ion collisions. Moreover, at LHC energies the recombination of uncorrelated charm-quark pairs, namely (re)generation, was found to significantly affect charmonium observables, in contrast to the well-known suppression mechanism. On the other hand, measurements in smaller collision systems such as p--Pb have highlighted the possibility to observe QGP-like effects, for instance the larger relative suppression of the $\psi(2S)$ with respect to the J/$\psi$. In this context, the study of charmonium production in light-ion collisions becomes increasingly interesting, representing an ideal test ground for state-of-the-art theoretical models. In this contribution, new measurements of charmonium production and elliptic flow are presented using data collected for the first time at the LHC in 2025 in light-ion collisions (oxygen-oxygen, proton-oxygen, and neon-neon). The results are shown exploiting the full ALICE rapidity coverage at mid-rapidity ($|y| <$ 0.8) and forward rapidity (2.5 $< y <$ 4). Finally, the measurements are compared with existing theoretical models.

Speaker: Sara Garetti (Université Paris-Saclay (FR))

ICHEP_2026_garetti.pdf

12:00 PM Quarkonium production in light and heavy ion collisions at LHCb

Quarkonium production in hadronic collisions is a key observable for studying the interaction of heavy quarks with the nuclear medium. In particular, it has long been recognized as an way to infer indirectly the temperature of the medium formed in heavy ion collisions, by comparing the dissociation rate of ground and excited states with different binding energies. The interpretation of quarkonium production data are complicated by cold initial- and final-state effects such as shadowing and co-mover breakup. During Run 3, LHCb collected its first samples of $p$O, OO, and NeNe collisions during the summer of 2025, and a sample of PbPb collisions with an extended centrality coverage and increased luminosity compared to that from Run 2. In addition, LHCb operated simultaneous as a fixed-target experiment collecting large charmonium samples with different gaseous targets with proton and ion colliding beams at an energy range of $\sqrt{s_{\mathrm{NN}}}\sim100\,\mathrm{GeV}$. Thanks to the excellent LHCb capabilities for measuring quarkonium in its dimuon channel, these diverse samples are perfect to test the QGP formation threshold in systems of different size and geometrical configurations. In this contribution, first results of quarkonium production in these collisions systems will be presented.

Speaker: Giulia Manca (Universita` degli studi di Cagliari and INFN, Cagliari, IT)

ICHEP2026_GiuliaManca_v3.pdf

12:15 PM Quarkonia collectivity in proton-proton and Pb-Pb collisions with ALICE

Quarkonium production in high-energy nuclear collisions is a powerful probe of deconfinement and the properties of the quark--gluon plasma (QGP). At LHC energies, the interplay between suppression and regeneration mechanisms plays a key role, in particular for the $\mathrm{J}/\psi$, offering a unique opportunity to study quarkonium formation and dynamics among various competing production processes. In addition to production yields and excited-to-ground-state ratios, measurements of quarkonium azimuthal anisotropies provide insight into the collective behavior and degree of thermalization of heavy quarks. Significant elliptic flow ($v_2$) of the $\mathrm{J}/\psi$ observed in Pb--Pb collisions supports scenarios of charm-quark thermalization and regeneration, while complementary measurements of the $\Upsilon(1S)$ probe the medium response of beauty quarks. In this contribution, the latest ALICE results are presented, including $J/\psi$ and $\psi(2S)$ production and measurements of the $J/\psi$ spin alignment in Pb–Pb collisions at $\sqrt{s_{\rm{NN}}}$= 5.02 TeV, and the $J/\psi$-to-$\psi(2S)$ ratio in Pb–Pb collisions at $\sqrt{s_{\rm NN}}=5.36$~TeV. In addition, quarkonium elliptic flow from small (pp) to large (Pb--Pb) collision systems are reported. The results are compared with theoretical model calculations and their implications for quarkonium production and collectivity are discussed.

Speaker: Maurice Coquet (CERN)

ICHEP2026_v6.pdf

10:45 AM → 12:30 PM Astroparticle Physics and Cosmology

Convener: Joao de Mello Neto

10:45 AM Event Reconstruction and Gamma-Hadron Separation with TAIGA-IACT

TAIGA (Tunka Advanced Instrument for cosmic rays and Gamma Astronomy) is hybrid air-shower observatory located in Eastern Siberia. The primary task of the facility is the detection of air-showers produced by high-energy gamma rays. Within this task, it is crucial to distinguish gamma-induced events from the hadronic background, since the hadronic background exceeds the gamma-ray flux by several orders of magnitude. The talk will review the methods used for gamma-hadron classification at the imaging cherenkov telescopes TAIGA-IACT in mono observation mode and present an overview of the data processing pipeline and the reconstruction of the energy spectra of observed sources.

Speaker: Pavel Bezyazeekov (Joint Institute for Nuclear Research)

Bezyazeekov_ICHEP2026_v5.pdf

11:00 AM Status and new developments for PEPS

The project Probing Extreme PeVatron Sources (PEPS) aims at measuring the most energetic γ-rays from our Galaxy in the energy range between 10¹⁵ eV and 5×10¹⁶ eV, opening a new energy window for multimessenger astroparticle physics. PEPS will consist of an array of 10 km² placed in the southern hemisphere at the Pierre Auger Observatory. It will be built in two phases. Already the first phase, with a surface of 2 km² , will be the largest detector for γ-rays compared to the existing and planned experiments. The status of hardware developments for PEPS and its sensitivities will be presented.

Speaker: Ioana Maris

ichep_peps_ioana.pdf

11:30 AM Technological Developments in Rotomolded HDPE Tanks for Water Cherenkov Detectors

Water Cherenkov detectors (WCDs) are fundamental components of large-area observatories dedicated to the study of gamma rays and cosmic rays, where thermal stability, optical properties, and tank industrial feasibility are critical for performance and scalability. In the context of the Southern Wide-field Gamma-ray Observatory (SWGO), new concepts of rotomolded high-density polyethylene (HDPE) tanks are being developed, targeting functional integration and operation in extreme environments.
In this presentation, three technological developments will be presented. The first concerns a thermally insulated tank designed to reduce thermal losses and mitigate water freezing under prolonged negative ambient temperatures, with preliminary thermal simulations indicating stable operational conditions. The second development corresponds to a simple rotomolded tank with direct incorporation of ultraviolet reflective optical properties through a new developed resin compatible with the rotomolding process, eliminating the need for internal liners. Initial tests indicate high reflectivity in the UV–visible range, with the material still under optimization. The third development consists of a double tank rotomolded as a single piece, incorporating two separated hydraulic volumes, currently in the prototyping phase, aiming to eliminate double-layer internal liners foreseen for use in the SWGO core region.

Speaker: Luis Miguel Domingues Mendes

ICHEP 2026 - Luis Mendes - Technological Developments in Rotomolded HDPE Tanks for Water Cherenkov Detectors.pdf

11:45 AM Construction and test of a position-sensitive Muon detector using wavelength-shifting (WLS) optical fibers

Muons are a present background radiation in most of the underground experiments, due to their small nuclear interaction cross-section and high kinetic energy. In rare-event experiments, like COSINE-100U, which searches for dark matter nuclear interactions, muon detectors play an important role as secondary veto detectors, where all muon-coincidence events with the NaI(Tl) crystals are discarded. In this work, we developed an alternative construction of a plastic-scintillator-based muon detector with the addition of wavelength-shifter optical fibers to provide position information, allowing the study of muon trajectories, with the possibility of future muography studies. The results of the muon detection efficiency and first position calculation algorithms will also be presented.

Speaker: Bruno Basso Manzato (Universidade de São Paulo)

ICHEP2026_BrunoManzato.pdf

12:30 PM → 2:30 PM Lunch

2:30 PM → 4:15 PM Neutrino Physics

Convener: Carla Bonifazi

2:30 PM CONNIE Experiment: Recent results and prospects

The Coherent Neutrino Nucleus Interaction Experiment (CONNIE) employs Skipper-CCDs (charge-coupled devices) at the Angra-2 nuclear reactor in Brazil with the aim of detecting coherent elastic neutrino-nucleus scattering (CEvNS) and searching for physics beyond the Standard Model. The introduction of Skipper-CCDs allowed the experiment to reach a detection threshold of 15 eV, greatly increasing the sensitivity to low-energy events and rare interactions. The recent CONNIE measurements have led to stringent limits on dark matter-electron interactions through diurnal modulation, world-leading bounds on reactor-produced millicharged particles through a combined analysis with the Atucha II experiment, and improved constraints on non-standard neutrino interactions via light vector mediators. In 2024, a Multi-Chip Module (MCM) containing 16 Skipper-CCDs, based on the Oscura experiment design, was installed to increase the active target mass and expected sensitivity. This work presents recent results, progress in commissioning the upgraded detector, and prospects for CEvNS detection and further searches for rare processes.

Speaker: Pedro Zilves Maio Ventura (São Paulo University)

ICHEP2026_PedroVentura (2).pdf

2:45 PM Results on Coherent Elastic Neutrino–Nucleus Scattering from the NEON Experiment

The NEON experiment aims to detect coherent elastic neutrino–nucleus scattering (CEvNS) induced by reactor electron antineutrinos using a 16.5 kg NaI(Tl) detector. The detector is installed at a distance of 23.7 m from the Hanbit Unit-6 reactor core in Yeonggwang, South Korea. Data taking began in April 2022, and stable operations have accumulated 860 days of reactor-on data and 223 days of reactor-off data. The NaI(Tl) detector has an average light yield of 25.6 photoelectrons per keV, enabling low-energy analyses in the sub-keV region. This presentation describes the data analysis process, including background modeling and event selection. We then present the CEvNS results obtained using the full NEON data set.

Speaker: Koh Byoungcheol (Department of Physics, Chung-Ang University)

ICHEP2026_NEON_KOH.pdf

3:00 PM Project SATURNE: The study of coherent elastic scattering of tritium antineutrinos and constraint on the neutrino magnetic momen

After an introduction to the theory of neutrino electromagnetic properties [1,2] and experimental constraints on the magnetic moments of neutrinos and other electromagnetic characteristics obtained in ground-based experiments (including the latest estimates from XENONnT [3] and LUX-ZEPELIN [4]) and results from astrophysical observations [5,6], we present the new SATURNE experiment, which is being implemented in the National Center for Physics and Mathematics in Sarov [7,8]. The goal of the SATURNE project is to detect for the first time the coherent elastic scattering of tritium antineutrinos on liquid helium target atoms in the superfluid state to obtain new upper bound on the scales .

[1] C.Guinti, A.Studenikin, Rev. Mod. Phys. 87 (2015) 531.
[2] C.Giunti, A.Kouzakov, Y.F.Li, A.Studenikin, Annu. Rev. Nucl. Part. Sci. 2025, 75:1.
[3] A.Khan, Phys. Lett. B 837 (2023) 137650.
[4] M.Atzori Corona et al., Phys. Rev. D 107 (2023) 053001.
[5] S.Jana, Y.Porto, Phys. Rev. Lett. 132 (2024) 101005.
[6] V. Brdar et al., Phys. Rev. D 107 (2023) 073005.
[7] M.Cadeddu, F.Dordei, C.Giunti, K.Kouzakov, E.Picciau, A.Studenikin, Phys. Rev. D 100 (2019) 073014.
[8] M.Cadeddu, F.Dordei, C.Giunti, A. Ivashkin, K.Kouzakov, F.Lazarev, O. Moskalev, I.Stepantsov, A.Studenikin, I.Tkachev, V.Trofimov, M.Verkhovtsev, M.Vyalkov,A.Yukhimchuk, E.Zagirdinova, Springer Proc.Phys. 425 (2025) 99.

Speaker: Prof. Alexander Studenikin (Moscow State University)

1_Studenikin_01_08_2026.pdf

3:15 PM Tau Neutrino Observation Prospects in DUNE Using NuGraph

Among nature's most elusive particles, tau neutrinos are notoriously hard to detect, with only a few dozen high-purity events ever observed. The Deep Underground Neutrino Experiment (DUNE) is set to change this dramatically by using an intense neutrino beam and leveraging millimeter-scale resolution to statistically isolate hundreds of tau-neutrino interactions.
In this talk, I present studies evaluating DUNE's tau-neutrino discrimination capability using NuGraph, a graph neural network designed to classify charged-current interactions. By operating directly on detector "hit" information (minimal energy depositions along particle trajectories) NuGraph offers a lightweight architecture that minimizes dependence on high-level reconstruction.
Trained on Monte Carlo samples for both nominal and tau-optimized beam configurations, the model demonstrates strong identification performance, with signal-to-background separation projected to exceed 8$\sigma$ of significance (assuming tau-optimized exposure). Due to its hit-based approach, NuGraph is also expected to be well-suited for atmospheric neutrinos, where incoming particles span the full sky. We present preliminary studies on atmospheric samples indicating that NuGraph maintains flavor-separation performance comparable to the beam configuration. Given that atmospheric neutrinos will be available early in DUNE's operation, this approach provides a promising pathway for immediate physics results in the experiment's initial phase.

Speaker: William Gregory Dallaway (University of Toronto (CA))

ICHEP2026_talk_wdallawa.pdf

3:16 PM Neutrino Interaction Measurements with the SBND Experiment

The Short-Baseline Near Detector (SBND) is a 112-ton scale Liquid Argon Time Projection Chamber (LArTPC) neutrino detector positioned in the Booster Neutrino Beam at Fermilab, as part of the Short-Baseline Neutrino (SBN) program. The detector is currently collecting neutrino beam data. Located only 110 m from the neutrino production target, SBND is exposed to a very high flux of neutrinos and will collect millions of neutrino interactions each year. This huge number of neutrino interactions, with the precise tracking and calorimetric capabilities of LArTPC, enables a wealth of cross section measurements to be made with unprecedented precision. In addition, SBND has the unique characteristic of being remarkably close to the neutrino source and deliberately not perfectly aligned with the neutrino beamline, in such a way that allows sampling of multiple neutrino fluxes using the same detector, a feature known as SBND-PRISM. SBND-PRISM can be utilized to study distinctive neutrino-nucleus interaction channels. This talk will motivate the SBND cross-section physics program, present ongoing measurement efforts, and discuss prospects for the rich program ahead.

Speaker: Francisco Javier Nicolas Arnaldos (University of Texas at Arlington)

ICHEP2026-SBNDNeutrinoInteractions.pdf

2:30 PM → 4:15 PM Electroweak and Top Quark Physics

Conveners: Jorge de Blas (Universidad de Granada (ES)), Miguel Ramos Pernas (CERN)

2:30 PM Electroweak Precision Physics at the FCC-ee

The electron-positron stage of the Future Circular Collider (FCC-ee) will provide measurements of the Z and W bosons couplings and masses 1--3 orders of magnitude better than the present state-of-the-art. In the Z pole run, with integrated luminosities about six orders of magnitude larger than at LEP, the Z boson mass and width, $Z \to b\bar{b}$ partial width, and the forward-backward asymmetries for leptons and quarks will be measured with ppm-scale precision. As a result, the effective weak mixing angle and the electromagnetic coupling at the Z pole can be extracted with $O(10^{-5})$ relative uncertainties. Similarly, the $2\times10^8$ W boson pairs expected close to the threshold, will deliver determinations of the W boson mass and width at the few hundred-keV level. This new level of experimental accuracy requires a proactive study of accelerator operation and detector design beyond anything that has so far been achieved at colliders. Such studies have begun and welcome new ideas and participants. Via electroweak loop corrections or mixing of new physics with the SM particles, the indirect discovery potential for new weakly interacting particles extends up to energy scales of around 50 TeV, or down to couplings of $10^{-11}$.

Speaker: Matteo Defranchis (CERN)

EW_FCC_ICHEP_2026_MD.pdf

2:45 PM Heavy and strange forward backward asymmetries at FCC-ee

Electron-positron collisions at the leptonic mode of the Future Circular Collider (FCC-ee) will offer an unprecedented opportunity to study electroweak interactions with extreme precision through measurements at the $Z$ pole. In this context, forward–backward asymmetries of charm, strange, and bottom quarks constitute powerful observables for probing the vector and axial-vector nature of couplings of the $Z$ boson to fermions at its extremes. Owing to the enormous $Z$ boson statistics expected, these asymmetries can be measured with orders-of-magnitude improvement over previous experiments. We discuss the prospects for determining the forward–backward asymmetries of $c$, $s$, and $b$ quarks, emphasizing the dependence of their precision on flavor tagging and charge reconstruction techniques tailored to FCC-ee conditions, and on control of systematic uncertainties. Precise measurements of these observables enable stringent tests of the Standard Model, improved determinations of the effective weak mixing angle, and enhanced sensitivity to physics beyond the Standard Model through deviations in electroweak couplings. In particular, the strange-quark asymmetry, historically limited by experimental challenges, becomes accessible with competitive precision. These measurements at the FCC-ee will play a central role in a global electroweak fit, providing complementary constraints to other precision observables and significantly extending the legacy of LEP, SLC and LHC.

Speaker: Laura Pintucci (Universita degli Studi di Udine (IT))

HeavyAndStrangeQuarkForwardBackwardAsymmetries_v2.pdf

3:00 PM Top and Electroweak physics at the Linear Collider Facility at CERN

The linear option for a future e⁺e⁻ collider facility at CERN, with its extended energy reach and polarized beams, offers unique opportunities for precision electroweak studies and investigations of the top-quark sector. Beam polarization enhances the sensitivity to key processes, improves background suppression, and allows for a significant reduction of systematic uncertainties.
The extended energy range is particularly relevant for studies of the top quark above the pair-production threshold, including direct sensitivity to the top Yukawa coupling. The clean experimental environment and well-defined initial state provide an ideal setting to scrutinize Standard Model interactions and possible extensions through precise determinations of electroweak and top-quark couplings, interpreted within the framework of the Standard Model Effective Field Theory. These studies offer strong complementarity to hadron collider programs.

Speaker: Prof. Toshinori Mori (University of Tokyo (JP))

TopEW_LCF_mori_v1.pdf

3:15 PM The WHIZARD Monte Carlo Generator for Current and Future Colliders

Monte Carlo (MC) event generators are central to data analyses at the LHC and will remain equally important for future colliders operating at high energies and luminosities. With a Higgs factory on the horizon and ongoing studies of the physics potential of multi-TeV machines, continuous development of MC generators is required to match the projected experimental precision.

We present a status report on recent developments in the WHIZARD event generator, an efficient and widely used tool for the simulation of exclusive and inclusive multi-particle processes. We review progress in NLO calculations, loop-induced processes, and features driven by BSM physics. Furthermore, we discuss new developments within the framework of collinear factorisation, including a revised implementation of the Equivalent Vector Boson Approximation and a new and unique implementation of Electroweak Parton Distribution Functions. Finally, we outline ongoing work and future plans, such as improvements in exclusive studies of top-quark pair production at the threshold.

Speaker: Krzysztof Mekala

Whizard_Mekala_ICHEP26.pdf

3:30 PM Probing first-generation quark couplings at the Z pole

Electroweak precision measurements provide stringent tests of the Standard Model and are highly sensitive probes of new physics. Precise determinations of the Z-boson couplings to first-generation quarks, which are weakly constrained mainly by LEP data, could reveal deviations from theoretical predictions. Future colliders operating at the Z pole would offer an excellent environment for such studies, enabling analyses based on comparisons of radiative and non-radiative Z-boson decays.

We present a method to extract the Z-boson couplings to light quarks and discuss the expected measurement uncertainties, including contributions from various sources of systematic effects. We show that the dominant limitation arises from systematic uncertainties in heavy-flavour tagging performance, and that reducing these uncertainties to the sub-per-mille level may be crucial to fully exploit the high luminosity of future Z-pole machines. Under these conditions, the proposed measurement could improve upon the LEP results by at least an order of magnitude.

Speaker: Krzysztof Mekala

Light_quarks_Mekala_ICHEP26.pdf

3:45 PM Parton density functions for future electron-positron colliders

Recent advances in QED parton density and fragmentation functions are described. Analytic expressions for these functions are derived by solving QED DGLAP evolution equations in the next-to-leading logarithmic approximation. Higher-order radiative corrections due to initial-state radiation in processes of electron-positron annihilation are calculated and implemented into the ZFITTER code. The dependence on scheme and factorization scale choices is analyzed. The results are relevant for applications at future high-energy electron-positron colliders including CEPC and FCC-ee.
The talk is based on the series of works by A.Arbuzov and U. Voznaya: JPG 50 (2023) 12, 125004; PRD 109 (2024) 5, 053001; arXiv:2511.00437 [hep-ph].

Speaker: Andrej Arbuzov (Joint Institute for Nuclear Research)

arbuzov_ICHEP_2026.pdf

4:00 PM On the Theoretical Precision of the Luminosity at Future Lepton Colliders

While the LEP precision physics requirements on the theoretical precision tag for the respective luminosity were 0.054 % (0.061%) at $M_Z$, where the former (latter) LEP result has (does not have) the pairs correction, for the contemplated FCC-ee, CEPC, and ILC Higgs/EW factories, one needs improvement at $M_Z$ to at least 0.0001% for the theoretical precision tag for the first two of the three factories and ten times worse for the last of the three factories. We discuss the paths one may take to achieve these goals and present an update on the current expectations for both $M_Z$ and proposed higher energy scenarios.

Speaker: Bennie Ward (Baylor University (US))

ICHEP2026lumi.pdf

2:30 PM → 4:15 PM Higgs Physics

Conveners: Giovanni PADOVANO (ROMA 1), Giovanni Padovano (Sapienza Universita e INFN, Roma I (IT))

2:30 PM Higgs boson couplings to hadrons, and invisible and rare decays at FCC-ee

The FCC-ee collider will deliver unparalleled sensitivity to Higgs boson decays, including couplings to quarks, gluons, and searches for invisible and rare decay modes. By employing advanced jet flavour tagging algorithms and exploiting a clean experimental environment, FCC-ee will measure the Higgs branching fractions to b, c, and gluon jets with sub-percent to few-percent accuracy. It will also provide stringent constraints on couplings to strange quarks and to extremely rare or flavour-violating decays, improving current limits by one order of magnitude. Additionally, the FCC-ee will achieve exceptional sensitivity to invisible Higgs decays, with expected limits at the $10^{-4}$ level, thus probing possible dark matter candidates or new hidden sectors.

Speaker: Diallo Boye (Brookhaven National Laboratory)

ichep2026_fccee_higgs_v3.pdf

2:45 PM Measuring the electron Yukawa in a s-channel e+e- -> Higgs run at FCC-ee

The potential to observe resonant Higgs boson production at FCC-ee via the s-channel process $e^+e^- \to H$ at $\sqrt{s}=125$ GeV will be presented. Although this production mode has an extremely small cross section, of O(300 ab) once initial-state radiation and a center-of-mass energy spread of about 4 MeV (achievable through beam monochromatization) are taken into account, it provides the only experimental means known to directly probe the electron Yukawa coupling. We will present the latest simulation studies, including a detailed detector-level analysis of the $H \to W(qq),W^*(\ell\nu)$ final state, which emerges as the most promising channel for this search. The projected sensitivities allow significantly improved constraints on the s-channel Higgs production rate, reaching values of the Yukawa coupling tantalizingly close to the Standard Model expectation.

Speaker: David d'Enterria (CERN)

dde_FCC-ee_schannel_Higgs_ICHEP26_natal.pdf

3:00 PM Searches for resonances decaying to Higgs and scalar bosons in ATLAS

Several physics scenarios beyond the Standard Model predict the existence of new particles that can subsequently decay into an additional scalar particle together with a Higgs boson (X->SH). This talk summarises ATLAS searches for resonant X->SH production in different decay channels with LHC Run 3 and Run 2 data.

Speaker: Christina Dimitriadi (KTH Royal Institute of Technology (SE))

ICHEP2026_XtoSH_CDimitriadi.pdf

3:15 PM Study of quantum entanglement effect in decays of Higgs bosons to vector boson pair with the ATLAS experiment

Entanglement is a fundamental feature of the quantum system. LHC experiments provide an unique opportunity to study quantum entanglement at the ultra-relativistic high energy scale. This presentation reports new results from the ATLAS experiment studying quantum entanglement effect between two vector bosons from the Higgs boson decay using LHC Run 2 and Run 3 data.

Speaker: Peter Kluit (Nikhef National institute for subatomic physics (NL))

ATLAS_QuantumEntanglement.pdf

3:30 PM Theory and Phenomenology of a Higgs Triplet Model

The Higgs Triplet Model extended with a Complex Singlet, often called the "123 Model", offers a compelling modification to the Standard Model scalar sector. This framework provides a rich phenomenology that addresses key open problems, such as the origin of neutrino masses and the nature of Dark Matter, all while reproducing the observed properties of the 125 GeV Higgs boson found in 2012. We will journey from the model's theoretical foundations to its collider phenomenology, searching for Charged Scalars as Long-Lived Particles (LLPs) and culminating with recent, novel results on Spontaneous CP Violation, all supported by a comprehensive computational implementation.

Speaker: Matheo Escobar Vergara (Pontificia Universidad Católica)

ICHEP - HTM_MGeV.pdf

3:45 PM Towards evidence of the H->Zγ decay with CMS data

Rare Higgs boson decays provide a unique window on the electroweak symmetry breaking and on potential effects beyond the standard model. The decay H→Zγ, one of the rarest accessible at the LHC, has not yet been observed. This channel is particularly sensitive to new physics, as it occurs exclusively through loop-level processes, and it is uniquely coupling the Higgs boson to the two neutral electroweak bosons: these distinctive features have considerable theoretical interests. This presentation reports the results of the search for the H→Zγ decay using proton–proton collision data collected by CMS during Run 2 and the beginning of Run 3, corresponding to a total integrated luminosity of approximately 200 fb-1. Through optimized event categorization and analysis techniques, the sensitivity to this decay is improved, and the results provide an updated measurement of its signal strength. These studies pave the way for future analyses that can potentially provide evidence with the complete Run 3 dataset, and observation at the High-Luminosity LHC.

Speaker: Francesco Orlandi (Université Paris-Saclay (FR))

orlandi_ichep.pdf

2:30 PM → 4:15 PM Software, Computing and Data Handling

Conveners: Carla Marin Benito (University of Barcelona (ES)), Enrico Bothmann (CERN), Prof. Jianming Bian (University of California Irvine (US)), Kevin Pedro (Fermi National Accelerator Lab. (US)), Marco Giacalone (CERN), Phat Srimanobhas (Chulalongkorn University (TH)), Thiago Tomei Fernandez (UNESP - Universidade Estadual Paulista (BR))

2:30 PM A large language model-driven, human-computer collaborative scientific user service platform

In the field of High Energy Physics, numerous large research infrastructures regularly solicit experimental proposals from researchers. The proposal management process encompasses a comprehensive sequence of stages: submission, multi-tiered review, approval of beamtime, scheduling, on-site execution, and outcome reporting. To address this, we have developed a scientific user service software that enables end-to-end management of experimental proposals.
Given the rapid advancements in Artificial Intelligence (AI), we further designed a human-computer collaborative platform powered by large language models. This platform seamlessly integrates AI capabilities throughout the entire workflow—from proposal drafting and review to evaluation, experiment planning, and knowledge consolidation. By incorporating intelligent assistance, the system significantly enhances both the efficiency and quality of proposal processing.The core objective of this platform is to establish a collaborative working mode in which human insight and AI intelligence are deeply intertwined. In this partnership, researchers act as strategic directors and final decision-makers, while large language models serve as powerful intelligent assistants. Together, they transform innovative ideas into executable experimental plans.
This work outlines the requirements analysis for the user service software, describes the developed framework, elaborates on the core functional modules, and presents specific design strategies for AI-enhanced implementation.

Speaker: Dr Wenshuai Wang (Institute of High Energy Physics)

1-ICHEP81C-Wenshuai.pdf

1-ICHEP81C-Wenshuai.pptx

2:45 PM A Natural Language Interaction Method for Scientific Software

In large-scale scientific facilities such as the High Energy Photon Source (HEPS), users encompass diverse disciplines and must handle varied data processing tasks within a highly heterogeneous software ecosystem, leading to steep learning curves and substantial support demands. To address these challenges, we propose an AI-based software interaction method that reduces researchers’ operational burden through natural language dialogue, using a typical data preprocessing workflow as an example.
The system comprises three core modules: (1) an Intelligent Interaction Parsing Layer that uses large language models to translate natural language commands into structured operational semantics; (2) a Visual Perception and Mapping Layer that employs real-time interface understanding to identify software states and UI elements, mapping semantics to precise control actions; and (3) a Task Execution and Service Layer that invokes standardized backend methods to perform the specified data preprocessing.
This approach provides real-time visual feedback via a virtual cursor, establishing a transparent translation of language commands into interface responses. It not only lowers users’ cognitive load when operating complex scientific software but also reduces the development and support burden on software teams.

Speaker: Shiyuan Fu (IHEP, CAS)

ichep2026_fusy.pptx

3:00 PM CBPF Computing Landscape: Current Capabilities and Future Outlook

Computing infrastructure is a fundamental component of modern High Energy Physics, enabling the distributed resources required for data acquisition, simulation, reconstruction, analysis, and the long-term operation of experiments at the Large Hadron Collider (LHC). Within this framework, the Brazilian Center for Physics Research (CBPF) has contributed for decades to the Brazilian particle physics program through its sustained participation in the Worldwide LHC Computing Grid (WLCG) and its support of the LHCb experiment at CERN.

The CBPF Grid site operates as a WLCG Tier 2 facility for LHCb and other Virtual Organizations. The site currently provides over 5,600 CPU cores, with network connectivity in the 10–40 Gb/s range and a redundant power infrastructure. This combination of capacity and reliability has placed CBPF consistently among the ten most productive LHCb sites worldwide.

Leveraging this established infrastructure, CBPF is advancing new computing initiatives which include studies on the feasibility of running parts of the LHCb HLT2 farm in a distributed environment, as well as the development of advanced AI applications.

In this talk, we will present how these developments collectively shape CBPF’s emerging computing ecosystem, highlighting current capabilities, ongoing projects, and the strategic path envisioned for the coming years.

Speaker: Eraldo Silva Junior (CBPF - Brazilian Center for Physics Research (BR))

2026 - ICHEP - Eraldo Junior.pdf

3:15 PM Distributed Computing Infrastructure in the Early Data Taking of JUNO

The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kton liquid scintillator detector located in South China, designed to achieve an unprecedented 3% energy resolution at 1 MeV. This capability is essential to determine the neutrino mass ordering and to perform high-precision studies of oscillation phenomena , opening new opportunities in neutrino physics. To support this ambitious physics program, JUNO relies on a robust Distributed Computing Infrastructure (DCI) jointly developed by IHEP and several European data centers, leveraging WLCG technologies. The DCI is expected to manage approximately 3 PB of data annually, ensuring efficient storage, distribution, and coordinated analysis across three continents.
This contribution presents the commissioning and early operational experience of the DCI during water and liquid scintillator filling, detector commissioning, and initial data-taking. We discuss the integration of computing resources, data management workflows, and performance metrics observed in early operations. Lessons learned from these activities demonstrate the readiness and scalability of the infrastructure to meet JUNO’s long-term requirements for precision neutrino physics.

Speaker: Joao Pedro Athayde Marcondes De Andre (Centre National de la Recherche Scientifique (FR))

20260801_jpamdandre_ICHEP.pdf

3:30 PM The management of the Analysis Life Cycle and a platform to explore Radiation Estimators from Simulation, the newest Glance-based web systems in LHCb

The Glance Project at CERN has been developing web systems for the Large Hadron Collider (LHC) experiments for over 20 years. These systems have the objective to aid the management of various aspects of the experiments, such as members, institutes, assets, radiation surveys, publications and simulations. In recent years in the LHCb experiment two systems have been deployed in production: the Analysis Life Cycle Management (ALCM) system, responsible for managing the workflow of LHCb papers from their inception in the physics working groups up until their publication; and the Analysis platform for Radiation Environment Simulations (ARES) allowing users to register, visualize, and analyse radiation estimators obtained from simulation. In the presentation we will give an overview of how ALCM and ARES are implemented usign Glance. We will also provide details of the functionalities and specificites of both systems.

Speaker: Menglin Xu (CERN)

ARES.pdf

ARES.pdf

3:45 PM Operational challenges of the Event Processing Nodes GPU farm at ALICE Experiment

The ALICE Event Processing Node (EPN) farm, a high-density GPU HPC system, serves as the backbone for real-time data reconstruction during LHC Run 3 period (2022—2026) and it is the largest computer farm at CERN, in terms of compute capacity. Comprising 350 nodes and 2800 GPUs, with a peak performance of 48 PFLOP/s, the EPN infrastructure has been operated throughout Run 3 by a dedicated team of two to three individuals at a time.
This contribution presents the experience gained during detector operations throughout Run 3, and architectural choices that enabled a 24/7-supported, high-reliability, low-maintenance operational model. An overview of the provisioning, configuration, and observability frameworks governing a specialized GPU-accelerated HPC facility is presented. Management spans the physical layer—including infrastructure—through the software stack and experiment-specific software. A key feature of this architecture is the integration with central detector-control systems and the logical separation of synchronous and asynchronous processing modes. To conclude, a retrospective is provided on several years of continuous operation, offering a blueprint for how small teams can maintain mission-critical scientific infrastructure through robust automation and sustainable practices.

Speaker: Giada Erba (Goethe University Frankfurt (DE))

ICHEP 2026 - Operational challenges of the Event Processing Nodes GPU farm at ALICE Experiment.pdf

2:30 PM → 4:15 PM Technology Applications and Industrial Opportunities

Conveners: Tiago Motta Quirino, Tiago Quirino (Universidade do Estado do Rio de Janeiro (BR))

2:30 PM 10GbE Streaming Readout Benchmarking

Modern high-energy physics experiments increasingly adopt triggerless or hybrid streaming readout, pushing digitizer links and online processing toward multi-GB/s throughput. We benchmark the Streaming Readout (SRO) performance of CAEN Digitizer 2.0 platforms and quantify how protocol choices and data handling set practical limits. Using a minimal acquisition program based on CAEN FELib on two Ubuntu 24.04 hosts with difference performance, we evaluate 10GbE UDP operation under standard MTU (1500) and jumbo frames (9000), along with common OS/NIC tuning. For triggered raw waveform readout, throughput reaches approximately 1140 MB/s with MTU 9000 and no packet loss, indicating saturation at the physical link. For DPP list-mode streaming (16-byte hits: channel, timestamp, energy, PSD, flags), we measure up to approximately 8 Mcps per channel and 40 Mcps per board (around 600 MB/s), where the dominant limitation is FPGA event sorting rather than network bandwidth. When optional waveforms are appended rates become bandwidth-dominated and scale with record length. Online decoding of streaming hits in FELib shows a bottleneck at 5.6 Mcps (~85 MB/s) due to context-switch overhead; the higher-level CoMPASS DAQ reaches approximately 1 Mcps. Optimization directions include batched raw-data APIs, and multithreaded producer–consumer processing at scale.

Speaker: Dr Ferdinando Giordano

ICHEP26_10GbE_Readout.pdf

2:45 PM EASY: Radiation- and Magnet-Tolerant Power for HL-LHC

The HL-LHC imposes stringent requirements on detector power systems, demanding high efficiency, compactness, and long-term reliability in harsh radiation and magnetic fields. To address these challenges, we present the new EASY platform, a novel generation of distributed power supplies capable of operating in both safe and extremely hostile environments. The EASY platform’s architecture integrates HV/LV conversion as well as liquid-cooled high-power modules.
We will showcase the results of 2026 tests conducted at CERN’s CHARM mixed-field facility, and in magnetic fields up to 1.0 T. The primary focus of these tests is on validating four key modules: A6010, a liquid-cooled converter boasting record power density in hostile conditions; A5512, HV boards capable of delivering up to 12 kV for HL-LHC detectors; A5016, a 16 A module featuring parallelizable channels; and A6603, a mixed board providing LV (current- or voltage-driven) outputs alongside HV. All these modules demonstrated stable operation after irradiation, maintained nominal regulation and ripple, and achieved efficiencies exceeding 80%.
The new modules enhance channel and power density, while the R6060 controller significantly reduces latency, offering up to an order-of-magnitude faster response. These results underscore the platform’s readiness for HL-LHC Phase-2 upgrades, thereby supporting its long-term deployment in experiments.

Speaker: Dr Ferdinando Giordano

ICHEP26_EASYforHLLHC.pdf

3:00 PM Recent analyses of muon tomography in the nuclear field

The necessity of a stable, low-carbon-emission source of energy drives the construction of new nuclear reactors worldwide. This also increases the production of nuclear waste, which needs to be stored and controlled for safety reasons. The control with additional radioactive sources is not preferred because of the radiation hazard. At CEA-IRFU, Micromegas detectors designed for high-energy physics are being used to study the use of muon tomography for nuclear dismantling. Muon tomography is a non-invasive and non-destructive technique used to scan the inside of objects without breaking them. This is especially useful to study nuclear waste without opening the protective sealing. For that reason, applications to different aspects of the nuclear industry are being studied. Some examples can be the imaging of the nuclear reactor G2/G3 in CEA-Marcoule, the imaging of nuclear waste barrels, or the variation of water level in the power plant cooling system. The low muons flux, originated from cosmic rays, is one of the major limiting factors for industry since it can extend the acquisition time significantly. To manage this, a variety of algorithms are being used. Recently, machine learning architectures have been applied, helping to improve the reconstructed images.

Speaker: Greppi Mattia

RECENT_ANALYSES_OF_MUON_TOMOGRAPHY_IN_THE_NUCLEAR_FIELD_ICHEP.pdf

3:15 PM Evaluation of GEM Detector Performance for Security and Agricultural Imaging Applications Beyond High-Energy Physics

Gas Electron Multiplier (GEM) detectors are a well-established MPGD technology in high-energy physics, offering high detection efficiency, fast signal response, excellent spatial resolution, and scalability to large active areas, making them attractive for precision imaging applications beyond high-energy physics experiments. The talk explains GEM operation, highlighting charge amplification and spatial localisation. The implementation of GEM detectors in dedicated imaging configurations is discussed, and the performance of prototype systems is evaluated using experimental data. The results demonstrate spatial resolution better than 1 mm, consistent with expectations from charge transport and diffusion in the gas. Material identification studies achieve uncertainties below 1%, demonstrating stability and uniform response. As a representative non-HEP application, preliminary results from agricultural soil imaging are presented, showing that GEM-based measurements exhibit clear sensitivity to variations in soil density and moisture content, enabling reliable differentiation of soil types and moisture conditions. These results showcase GEM detectors as versatile tools beyond fundamental high-energy physics. In particular, GEM-based soil imaging opens new opportunities for quantitative soil characterisation in agriculture, with relevance to precision farming and crop management, and illustrates how detector technologies developed for high-energy physics can evolve into robust tools for agricultural and environmental studies.

Speaker: Chandra Prakash (University of Delhi (IN))

ICHEP_GEM_Talk-2.pdf

3:30 PM CAIPORA: From smart triggers to adaptative headlights

Particle detectors rely on triggering logic to record meaningful events. Historically, most electronic triggers use field programmable gate arrays (FPGAs) due to their flexibility and relatively low cost compared to custom chips (ASICs). Nowadays, FPGAs have grown to hundreds of thousands of logic units, enabling them to act as neural networks, the caveat being that models need to be simplified to fit the combinatorial logic in what is called a field programmable neural array (FPNA). Implementing FPNAs as triggers offers potential advantages over traditional logic triggers, primarily the ability to classify complex patterns. This research project, internally known as CAIPORA (Compact Artificial Intelligence Placed on Reprogrammable Array), initially aimed at triggering supernova events and has found its first use not in astrophysics experiments but on car headlights. Approaching a local automotive headlight industry, we proposed using the CAIPORA technology to help them develop adaptive headlights, those that can turn off selected areas of the light beam so as not to obfuscate incoming drivers. We present the first year's results of this three-year FAPEMIG-funded partnership and discuss the advantages of this model of funding for both science and industry.

Speakers: Gustavo Do Amaral Valdiviesso (Instituto de Fisica (IFUSP)-Universidade de Sao Paulo-Unknown), Gustavo Do Amaral Valdiviesso (Universidade Federal de Alfenas)

CAIPORA_GAValdiviesso.pdf

3:45 PM R&D on Instrumentation for Time-Domain Diffuse Reflective Spectrometry

Fast single-photon optical pulse timing is essential for high-energy physics instrumentation, including time-of-flight particle identification and fast Cherenkov-photon detection in Ring Imaging Cherenkov (RICH) detectors. Meeting these requirements calls for high-precision time-to-digital converters (TDCs), ultrafast pulsed light sources, and sensitive photodetectors as silicon photomultipliers (SiPMs) can achieve single-photon detection time precision below 100 ps. In this work, we present methodologies and instrumentation for the detection and timestamping of single-photon events within the framework of diffuse reflective spectrometry. A prototype system is implemented by integrating a high-speed TDC, an ultrashort-pulse laser source, and SiPM-based photodetection module. The proposed approach enables studies of light propagation in highly scattering media. The capabilities of the method are demonstrated using multiple scattering phantoms.
Keywords: Single-photon timing; time-to-digital converter (TDC); silicon photomultiplier (SiPM); time-of-flight (TOF); diffuse reflective spectrometry (DRS); time-domain diffuse optics (TD-DO), scattering phantoms.

Speaker: Alexandr Selyunin (Joint Institute for Nuclear Research (RU))

ICHEP2026_Selyunin.pdf

2:30 PM → 4:15 PM Strong Interactions and Hadron Physics

Convener: Leticia Palhares

2:30 PM Study of charm fragmentation with charm meson and baryon angular correlation measurements with ALICE

The study of charm-quark production and hadronisation provides crucial insights into the mechanisms of Quantum Chromodynamics (QCD) at the interface between the perturbative and non-perturbative regimes. Differential measurements of jets containing charm hadrons further shed light on QCD processes such as parton-shower evolution and hadronisation. In particular, angular correlations between charm hadrons and charged particles provide valuable information on charm-jet topology and charm-quark hadronisation. Such studies also help test and constrain theoretical models and Monte Carlo generators describing charm production in proton--proton (pp) collisions.

This contribution presents ALICE measurements of angular correlations between charm hadrons and charged particles in pp collisions at $\sqrt{\mathrm{s}} = 13.6$ TeV. The azimuthal correlations are studied separately for charm mesons with and without strange quarks and for charm baryons, to gain sensitivity on how the hadronisation process can influence the jet structure and composition. Measurements of heavy-flavour correlations with identified particles are also presented, aimed at testing local quantum-number conservation. Together, these results provide new insights into charm fragmentation and hadron formation in small collision systems.

Speaker: Zhen Zhang (Central China Normal University CCNU (CN))

ICHEP_2026_charmcorrelation_Zhen.pdf

2:45 PM Fragmentation function studies at BESIII

Fragmentation Function (FF) plays a crucial role in describing the hadronization process. We report the measurements of normalized differential cross sections of inclusive hadron production as a function of hadron momentum at several energy points with $q^2$ transfer from 5 to 13 $GeV^2$ at BESIII. The results are compared from several theoretical calculations based on existing fragmentation functions, and provide new ingredients for future FF global data fits, thereby enhancing our understanding of hadronization in the relatively low-energy region.

Speaker: Linqin Huang

FFs-at-BESIII-ICHEP2026.pdf

3:00 PM Chiral limit of a fermion-scalar (1/2)+ system in covariant gauges

This work presents a nonperturbative investigation of relativistic bound states with spin $(1/2)^+$, described within an effective fermion–boson model featuring vector interaction (NORONHA et al.,2023). The system, formulated as a quark–diquark approximation to the proton, is analyzed through the homogeneous Bethe–Salpeter equation, which is solved in Minkowski space for different covariant gauge choices. The bound-state dynamics is treated within a one-particle-exchange ladder kernel, employing free propagators and pointlike vertices. The solution of the equation is made possible by the use of the Nakanishi Integral Representation combined with light-front projection, leading to a set of coupled integral equations for the Nakanishi weight functions associated with the Bethe–Salpeter amplitude. The ultraviolet behavior of the model is examined in detail, revealing the emergence of scale invariance, particularly in the chiral limit. Within this framework, we analyze how the choice of gauge affects the critical value of the coupling constant, observing an increase when moving from the Feynman gauge to the Landau gauge. In addition, the asymptotic properties of the light-front amplitudes are investigated, as well as the dependence of the eigenfunction structure on transverse momentum and longitudinal momentum fraction, providing a characterization of the bound state in the high-momentum regime.

Speaker: Aline Camargo Noronha

ICHEP_26_ALINE_NORONHA.pdf

3:15 PM 2. Low Transverse Momentum dependence for Drell-Yan and SIDIS processes

We present a detailed analysis of the T-even and T-odd lepton angular distribution in the Drell-Yan process, including γ/Z^0 gauge boson exchange and using perturbative QCD based on the collinear factorization scheme at leading order in the α_s expansion and α_s^2 for T-odd. We focus on the study of the transverse momentum Q_T dependence of the corresponding hadronic structure functions and angular coefficients up to next-to-next-to-leading order in the Q_T^2/Q^2 expansion. Analysis of SIDIS process will be shown.

Speaker: Alexey Zhevlakov (Joint Institute for Nuclear Research (RU))

Zhevlakov_ICHEP_2026_hadron.pdf

3:30 PM The polarized photon distribution function and QCD x QED corrections.

Parton distribution functions (PDFs) are a fundamental ingredient in the theoretical description of hard-scattering processes. Over the past decades, the steadily increasing precision of experimental measurements has made it necessary to improve the accuracy of theoretical predictions accordingly. In this context, precise determinations of PDFs have become indispensable.
In this presentation, I will discuss the LuxQED method for computing the polarized photon PDF. This approach allows the photon distribution to be expressed in terms of the polarized structure functions g1 and g2​. A central challenge of this method is the need for reliable knowledge of these structure functions over the entire kinematic space. I will review the models and assumptions commonly used to describe g1 and g2 in the different kinematic regions.
Finally, I will discuss mixed-order QCD x QED corrections to PDF evolution, which have a particularly significant impact on the photon PDF.

Speaker: Lucas Nahuel Horacio Palma

The polarized photon distribution function and QCDxQED corrections-ICHEP.pdf

3:45 PM NNLO Fragmentation Functions of Light Charged Hadrons and Constraints on Collinear PDFs

We present the first global analysis of fragmentation functions (FFs) for light charged hadrons ($\pi^{\pm}, K^{\pm}$) at full next-to-next-to-leading order in QCD, incorporating world data from both single-inclusive electron-positron annihilation and semi-inclusive deep-inelastic scattering. The collinear factorization has been tested with low-momentum-transfer data and has demonstrated success at high hadron momenta. Additionally, we study the impact of current global data on hadron production to the parton distribution functions (PDFs), and find they favor a reduced asymmetry in the strange (anti)quark PDFs, as compared to the asymmetry predicted by state-of-the-art PDFs derived from inclusive data.

Speaker: Xiaomin Shen (Institute of Modern Physics, Chinese Academy of Sciences)

XShen-ICHEP-FFs.pdf

2:30 PM → 4:15 PM Beyond the Standard Model

Convener: Andre Lessa (Universidade de Sao Paulo)

2:30 PM Searches for electroweak production of supersymmetric particles with the ATLAS detector

The direct production of electroweak SUSY particles, including sleptons, charginos, and neutralinos, is a particularly interesting area with connections to dark matter and the naturalness of the Higgs mass. The small production cross-sections and challenging experimental signatures lead to difficult searches. This talk will highlight the most recent results of searches performed by the ATLAS experiment for supersymmetric particles produced via electroweak processes, including analyses targeting small mass splittings between SUSY particles. Results are interpreted in terms of SUSY simplified models and, for the first time since the LEP era, several gaps in different ranges of mass-splittings are excluded.

Speaker: Francisco Alonso (National University of La Plata (AR))

ICHEP2026_EWK_SUSY_ATLAS_F_Alonso.pdf

2:45 PM Novel Multilepton signatures from the Fermionic Portal to Vector Dark Matter

We study striking multilepton signatures predicted by a broad class of Beyond-the-Standard-Model scenarios featuring a fermionic portal to a new dark gauge sector. Focusing on the muon-portal realisation with vector dark matter (MPVDM), we demonstrate that six-muon final states arise as a generic and robust collider signature across the full viable parameter space, independently of dark-matter-specific assumptions.

The signal originates from pair production of heavy vector-like leptons, each decaying into three muons through cascade decays mediated by new gauge and scalar states. Such $VLL \to 3 \mu$ decays are themselves highly distinctive and point to a well-defined class of BSM theories with extended gauge structure and fermionic portals. The resulting six-muon signature is essentially background-free, kinematically rich, and experimentally clean.

We present an optimised collider strategy for probing this channel, including event reconstruction, selection criteria, and sensitivity estimates. Current LHC data already provide meaningful constraints, while the High-Luminosity LHC offers excellent discovery potential. Our results highlight multilepton final states, in particular six-muon events, as powerful and largely unexplored probes of new fermionic sectors beyond the Standard Model.

Speaker: Prof. Alexander Belyaev (University of Southampton & Rutherford Appleton Laboratory)

Belyaev-Multileptons-ICHEP2026.pdf

3:00 PM Searches for dark sector signatures with CMS

Among the intriguing scenarios of new physics that provide explanation to several shortcomings of the Standard Model (SM), hidden valley scenarios include a Dark Sector that extends the SM with a non-Abelian gauge group, similar to quantum chromodynamics with new matter and gauge fields analogous to the SM quark and gluon fields. This may result in a rich phenomenology which we can access through portal interactions. In this talk we present the most recent results from CMS that explore such Dark Sectors by exploiting dedicated data streams and innovative usage of the CMS detector.

Speaker: Emily Ann Smith (Fermi National Accelerator Lab. (US))

EmilySmith-ICHEP-CMSDarkSectorSignatures.pdf

3:15 PM Searches for supersymmetry in non-minimal models

Supersymmetry (SUSY) provides elegant solutions to several problems in the Standard Model, and searches for SUSY particles are an important component of the LHC physics program. With increasing mass bounds on MSSM scenarios other non-minimal variations of supersymmetry become increasingly interesting. This talk will present the latest results of searches conducted by the ATLAS experiment targeting strong and electroweak production in R-parity-violating models, as well as non-minimal-flavour-violating models

Speaker: Joaquin Hoya (Argonne National Laboratory (US))

JHoya_nonMinimalSUSY_ICHEP26.pdf

3:30 PM Searches for Supersymmetry at the CMS experiment

A wide variety of searches for Supersymmetry have been performed by experiments at the Large Hadron Collider. In this talk, we present recent highlights from these searches from the CMS experiment.

Speaker: Isabell Melzer-Pellmann (Deutsches Elektronen-Synchrotron (DE))

2026_Melzer-Pellmann.pdf

3:45 PM Searches for strong production of supersymmetric particles

Supersymmetry (SUSY) provides elegant solutions to several problems in the Standard Model, and searches for SUSY particles are an important component of the LHC physics program. Naturalness arguments favour supersymmetric partners of the gluons and third-generation quarks with masses light enough to be produced at the LHC. This talk will present the latest results of searches conducted by the ATLAS experiment which target gluino and squark production, including stop and sbottom, in a variety of decay modes within RPC SUSY.

Speaker: Silke Mobius (Universitaet Bern (CH))

ICHEP26_SUSYstrongSilkeMoebius.pdf

4:00 PM Probing new physics with dedicated data streams at CMS

Signatures of new physics at the LHC are varied and by nature often very different from those of Standard Model processes. Novel experimental techniques, including dedicated datastreams are exploited to boost the sensitivity of the CMS Experiment to search for such signatures. In this talk we highlight the most recent CMS results, obtained using the data collected at the LHC Run-II and Run-III through the so-called “Data Scouting” and “Data Parking” strategies. These approaches have allowed to set some of the strongest constraints to date for low mass resonances in prompt and long-lived signatures.

Speaker: Juliette Alimena (DESY)

ScoutingAndParking_ICHEP_1Aug2026.pdf

2:30 PM → 4:15 PM Operation, Performance and Upgrade of Present Detectors

Convener: MAURO Cosentino (Universidade Federal do ABC (BR))

2:30 PM Characterization and Performance Validation of the T2K High-Angle TPCs

As a part of the upgrade of ND280, the off-axis detector of the T2K experiment, two new gaseous Time Projection Chambers (TPCs) have been installed above and below the highly segmented active target (SFGD) to enhance the tracking of particles emitted at a large angle with respect to the beam direction. The TPCs feature innovative, lightweight field cages constructed from low-density, low-Z materials and are equipped with 32 Encapsulated Resistive-Anode Micromegas (ERAMs), extensively characterized before the installation. The upgrade was completed in fall 2023 and, since then, commissioning with cosmics and neutrino beam confirmed stable operational performance.
This talk provides a comprehensive overview of the TPC design, focusing on the technological solutions developed to address the challenges of the field cage and readout integration. We will present performance results from the extensive commissioning phase, including a detailed comparison between experimental data and Monte Carlo simulations. Finally, the discussion will cover the upcoming measurement campaigns using both laser and particle beams, which are dedicated to the precise characterization of energy loss and the mapping of electric field uniformity within the detector volume.

Speaker: Daniele D'Ago (Universita e INFN, Padova (IT))

performance_T2K_HAT_Dago.pdf

2:45 PM Low-Energy calibration studies with neutron-induced scintillation light data for the DUNE experiment

The low-energy physics program of the Deep Underground Neutrino Experiment (DUNE) requires precise calibration of scintillation light production and detection in large Liquid Argon Time Projection Chambers (LArTPCs). Neutron-induced scintillation provides an excellent calibration handle at the MeV energy scale, relevant for supernova neutrinos, radiological backgrounds, and neutron capture tagging. This report summarizes the current low-energy calibration strategy of the DUNE collaboration, with emphasis on recent results from a pulsed neutron source campaign performed at the Vertical Drift ColdBox test facility at CERN. Detailed comparisons between data and simulation demonstrate good agreement in light yield and timing, validating the modeling framework. In parallel, a dedicated neutron data acquisition campaign on the large-scale Vertical Drift prototype is currently underway, and its status and preliminary results will also be reported.

Speaker: Franciole Marinho (Instituto Tecnológico de Aeronáutica)

PNS_PDS_ICHEP2026_v0.0.pdf

3:00 PM The AMS-02 RICH detector on the ISS: status and latest results

The Alpha Magnetic Spectrometer (AMS-02) has been operating continuously aboard the International Space Station (ISS) since May 2011. The Ring Imaging Cherenkov (RICH) detector provides precision measurements of particle velocity and charge, and plays an important role in the cosmic-ray isotope analysis. After more than 14 years of operation in space, its radiators and detection units are working nominally. The abundant cosmic-ray data allow for the high-precision on-orbit calibration of the radiators' refractive index and PMT readouts. A novel Cherenkov ring reconstruction method is introduced, which improves the performance of velocity and charge resolution. These instrumental achievements have enabled the precise measurement of cosmic-ray isotopes of light nuclei.

Speaker: Bowen Huang (ZJU - Zhejiang University (CN))

2026-08-01-ICHEP-AMS-02 RICH Detector.pdf

2026-08-01-ICHEP-AMS-02 RICH Detector.pptx

3:15 PM The DUNE FD-HD Photon Detection System

The Deep Underground Neutrino Experiment (DUNE) is a flagship next-generation neutrino oscillation experiment. Relying on Liquid Argon TPC technology, the most powerful (anti-)muon neutrino beam ever built, and a 1300 km baseline, it will achieve unprecedented precision in measurements of CP violation in the lepton sector and will ultimately establish the neutrino mass ordering.
The DUNE Far Detectors will be equipped with a capable Photon Detection System (PDS) to improve the accuracy of neutrino event reconstruction and to enable astroparticle studies by providing triggers for natural neutrino events.
In this talk, I will provide an overview of the PDS technology and the state of the art of its implementation in the DUNE Horizontal-Drift module. I will discuss the most recent performance results achieved during the ProtoDUNE-HD run at CERN, including timing capabilities, photon-collection and trigger efficiencies, and particle identification, demonstrating how the PDS design fulfills all DUNE technical requirements and how it can enhance the DUNE Physics program. Particular emphasis will be placed on the link between performance parameters and the physics potential they enable.

Speaker: Federico Galizzi (on behalf of the DUNE Collaboration) (University and INFN of Milano Bicocca)

DUNE_FDHD_PDS.pdf

3:30 PM Overview of ATLAS forward proton detectors: status, performance and new physics results

A key focus of the physics program at the LHC is the study of head-on proton-proton collisions. However, an important class of physics can be studied for cases where the protons narrowly miss one another and remain intact. In such cases, the electromagnetic fields surrounding the protons can interact producing high-energy photon-photon collisions. Alternatively, interactions mediated by the strong force can also result in intact forward scattered protons, providing probes of quantum chromodynamics (QCD). In order to aid identification and provide unique information about these rare interactions, instrumentation to detect and measure protons scattered through very small angles is installed in the beam pipe far downstream of the interaction point. We describe the ATLAS Forward Proton AFP Detectors, including their performance to date, covering Tracking and Time-of-Flight Detectors as well as the associated electronics, trigger, readout, detector control and data quality monitoring. Finally, a glimpse on the newest results will be given.

Speaker: Mario Campanelli (London UC)

AFP_ICHEP.pdf

2:30 PM → 3:45 PM Quark and Lepton Flavor Physics

Conveners: Erica Polycarpo Macedo (Federal University of Rio de Janeiro (BR)), Jianchun Wang (Chinese Academy of Sciences (CN))

2:30 PM Quark & Lepton flavour physics opportunities at FCC-ee

The Future Circular Collider (FCC) is a post-LHC project aimed at precision tests of the Standard Model and searches for new physics, on a new 91 km tunnel at CERN. At FCC-ee, the production of $\mathcal{O}(8\times10^{12})$ Z bosons will yield unprecedented samples of beauty and charm hadrons, exceeding those of Belle II by a factor of 20 and providing strong complementarity with the LHC heavy-flavour program. This dataset enables a broad flavour-physics program, including spectroscopy, precision studies of rare decays, and searches for CP violation. These measurements benefit from the clean experimental environment of $e^+e^-$ collisions, the large Lorentz boost of the produced hadrons, and access to the full spectrum of heavy-hadron species. In addition, tau-pair production during the Tera-Z phase will exceed Belle II yields by a factor of three. Combined with improved experimental conditions--better tau–hadron separation, clearer hemisphere definition, and higher track momenta--significant improvements in measurements of tau properties, including lifetime, mass, and leptonic and hadronic widths, are expected providing stringent tests of lepton universality. Searches for lepton-flavour-violating tau decays can be substantially extended, and precise measurements of tau polarisation will enable accurate determinations of neutral-current couplings. Exploiting statistical uncertainties at the $10^{-6}$ level poses demanding detector requirements.

Speaker: Aidan Richard Wiederhold (The University of Manchester (GB))

AidanWiederhold_FCC.pdf

2:45 PM Precision measurements of $\tau$ lepton decays at Belle II

The Belle II experiment has collected a $600~\mathrm{fb}^{-1}$ sample of $e^+e^-$ collision data at center-of-mass energies near the $\Upsilon(nS)$ resonances. This sample contains approximately 540 million $e^+e^-\to \tau^+\tau^{-}$ events, which we use for precision tests of the standard model. We present new measurements including the $C\!P$ asymmetry in $\tau \to K^0 \pi\nu$ decays, the $\tau$ lifetime, and branching fractions and spectral moments of $\tau$ decays to final states with strangeness.

Speaker: Paolo Leo (DESY)

Precision_measurements_of_tau_lepton_decays_at_Belle_II (1).pdf

3:00 PM Global fits of the Unitarity Triangle beyond the Standard Model. Updates from the UTfit collaboration.

The Unitarity Triangle analysis can be used to constrain the parameter space in possible new physics scenarios. We present an update of the Unitarity Triangle analysis beyond the Standard Model by the UTfit collaboration with the Summer 2026 inputs. Assuming new physics, all of the available experimental and theoretical information on DF=2 processes is combined using a model-independent parametrisation. We determine the allowed new physics contributions in the kaon, D, Bd, and Bs sectors and, in various new physics scenarios, we translate them into bounds for the new physics scale as a function of new physics couplings.

Speaker: Marcella Bona (Queen Mary University of London (UK))

bona-utfitNP.pdf

3:15 PM The role of Flavour in global SMEFT fits

We discuss the role of Flavour physics in global fits of dimension-six operators in the Standard Model Effective Theory. We present results from fits with different assumptions on the SMEFT flavour structure: $U(3)^5$, $U(2)^5$, Minimal Flavour Violation and Minimal Flavour Protection. The leading-order scale dependence of the SMEFT Wilson coefficients is consistently included in the evolution from the UV scale to the electroweak scale and to the low-energy scale of flavor observables. The Standard Model parameters, including quark masses and the CKM matrix, are simultaneously determined with the SMEFT coefficients. The impact of flavour physics in the global fit is highlighted. The global fit is obtained within the HEPfit framework and is based on the state-of-the-art of both experimental results and SM theoretical predictions for all the observables considered.

Speaker: Victor Miralles (University of Alicante)

VMiralles_ICHEP_Flavour.pdf

3:30 PM Probing Flavorful EFTs via VH and WV production at the LHC

Since the discovery of the Higgs boson, no clear footprints of New Physics (NP) have been observed at the LHC. This absence suggests a separation between the scale of NP and the electroweak scale. In this scenario, Effective Field Theories (EFTs) provide a model-independent framework to analyze LHC data and search for indirect signs of beyond-the-Standard-Model effects. In particular, diboson production (WV) and Higgs production in association with a gauge boson (VH) are sensitive to NP, especially in the high-energy tails of kinematic distributions. These energy-enhancement effects enable the extraction of constraints that can be competitive with those from electroweak precision observables, such as those measured at LEP. In this talk, I will discuss how WV and VH processes can probe the Wilson coefficients of Higgs current operators in the Standard Model EFT—specifically, operators that modify the couplings between gauge bosons and fermions—without imposing flavor assumptions. I will also show how these results can be complementary to those from electroweak precision observables and how the High-Luminosity LHC can help clarify current low-energy flavor anomalies.

Speaker: Matheus Martines de Azevedo da Silva (Universidade de São Paulo)

ProbingFlavorfulEFTs_pp_VW_LHC-ICHEP.pdf

2:30 PM → 4:15 PM Heavy Ions

Convener: Sandra Padula (UNESP - Universidade Estadual Paulista (BR))

2:30 PM Novel effects in quark-gluon plasma: gravity and quantum anomalies

A theoretical review of a number of new and interesting effects in quark-gluon plasma will be provided. Particular attention will be paid to phenomena related to quantum anomalies and gravity, in particular those observed by the author's research team. According to current concepts, quark-gluon plasma is a medium subject to extremely strong external fields and possesses extreme vorticity and acceleration. This gives rise to various new non-dissipative and dissipative transport phenomena that are impossible to observe under ordinary conditions, illustrating the relationship between heavy-ion physics, hydrodynamics, quantum field theory, and black hole physics.

Speaker: Georgy Prokhorov

prokhorov_ichep.pdf

2:45 PM Overview of the NA60+/DiCE experiment at the CERN SPS

A new fixed-target experiment, NA60+/DiCE, is proposed at the CERN SPS to measure muon pairs in the centre-of-mass energy range 6–17 GeV across collision systems from Pb–Pb to p–Be. Its physics scope spans topics from thermal radiation to chiral symmetry restoration, strangeness, and charm production.
The experimental apparatus comprises a high-resolution vertex spectrometer and a large-acceptance muon spectrometer. A vertex telescope based on ultra-thin, large-area Monolithic Active Pixel Sensors (MAPS) is positioned close to the target inside a dipole magnetic field. Downstream, the setup includes a muon spectrometer based on large-area gaseous detectors and a second dipole magnet. A high-intensity beam enables observables.
The physics program includes the search for chiral symmetry restoration through $\rho-a_1$ mixing, the study of the phase transition order at high baryochemical potential via a caloric curve, and the investigation of the onset of deconfinement through J/$\psi$ suppression. Additionally, NA60+/DiCE will measure medium transport properties using open-charm states and study hadrochemistry through strange hadrons and hypernuclei production.
A technical proposal was submitted to the SPS Committee in May 2025 and received positive feedback. Data taking is foreseen for 2030.
This talk will present the experimental apparatus, R&D activities, and physics program, highlighting the impact of NA60+/DiCE.

Speaker: Giacomo Alocco (Universita e INFN, Torino (IT))

ICHEP26_NA60p_DiCE_Alocco.pdf

3:00 PM Status of the NICA-MPD experiment at JINR

Nuclotron-based Ion Collider fAcility (NICA) is a new accelerator complex for heavy ions and polarized particles being under commissioning at JINR
The main goal of the Multi-Purpose Detector (MPD) at NICA is to study the structure of the QCD phase diagram at finite temperatures and high baryochemical potentials. The MPD will study heavy-ion collisions in a wide energy range 2.4-11 GeV both in the collider and fixed-target regimes. By measuring a wide variety of signals from heavy-ion collisions, the MPD will investigate various physics phenomena, including the equation of state and critical behavior of the QCD matter, properties of in-medium hadron spectral function, the characteristics of hyperon-nucleon interactions, etc. In this report, we review the status of the MPD facility and its physics program, with a focus on the first expected measurements.

Speaker: Petr Parfenov

ICHEP2026_MPDstatus_Parfenov.pptx.pdf

3:15 PM First results and plans of the BM@N experiment at NICA

The BM@N experiment is dedicated to a study of the hot and dense baryonic matter produced in heavy ion collisions using the NICA extracted beams from deuteron to Bismuth with kinetic energies of 1.5 – 4.5 AGeV. At such energies, the baryon density up to 3-4 times the nuclear saturation density is achieved. This allows one to search for the critical phenomena related with the mixed quark-gluon and hadronic phase in the region of a high baryonic chemical potential. It also allows one to constrain the matter Equation of State in the region of high baryon densities. First results on the production of positive pions, kaons, protons, deuterons and tritons in 3.2 AGeV Argon-nuclei collisions are presented and compared with the transport code predictions and parameterized with a Blast Wave Model. Based on the measured proton, deuteron and triton spectra, the deuteron and triton coalescence parameters and compound yield ratio $N_pN_t/N_d^2$ are given. Also shown are preliminary results on $\Lambda$-hyperon and neutral kaon spectra, anisotropic flows of protons and deuterons in Xe+CsI interactions at 3.8 AGeV. In the next years, high statistics scans with the Xenon and Bismuth beams of 1.5 – 3.8 AGeV on nuclear targets are planned.

Speaker: Mikhail Kapishin

Kapishin_BMN_ICHEP_.pdf

3:30 PM Strangeness production in light-ion collisions with ALICE at the LHC

Measurements in pp and pA collisions have revealed that small collision systems exhibit most of the signs traditionally attributed to heavy-ion collisions, such as the smooth increase of the strange hadron yields with the collision multiplicity (strangeness enhancement). A key question is how these effects evolve with system size and whether they can be described within a unified framework.
The recently collected data by ALICE of OO collisions at $\sqrt{s_\mathrm{NN}} = 5.36$ TeV provide an unprecedented opportunity to explore an intermediate-size system that naturally bridges the gap between pp/pA and Pb–Pb collisions. In this contribution, we present results on the production of strange particles (K$_{S}^{0}$, $\Lambda$, $\Xi$, and $\Omega$) as a function of charged-particle multiplicity in OO collisions. This allows us to investigate strangeness enhancement across different system sizes at comparable multiplicities, providing new insights into the mechanisms of strangeness production. The experimental results are compared with model predictions from various Monte Carlo generators.

Speaker: Mr Alberto Caliva (Universita e INFN, Salerno (IT))

strangeness_light_ions.pdf

2:30 PM → 4:15 PM Astroparticle Physics and Cosmology

Convener: Analisa Gabriela Mariazzi

3:15 PM Current status of SuperNova Early Warning System 2.0

This talk presents the current status and scientific objectives of the SuperNova Early Warning System (SNEWS) 2.0, the next-generation global neutrino coincidence network.

A core-collapse supernova is a unique multimessenger event, emitting neutrino, gravitational wave, and electromagnetic signals. SNEWS 2.0 is designed for the real-time detection of the prompt neutrino burst, which arrives hours before the light. By unifying and analyzing data from neutrino and dark-matter experiments worldwide, the system provides a robust, automated alert to the astrophysics community within minutes.

We discuss the architecture of SNEWS 2.0, which not only issues a reliable supernova alert but also performs on-the-fly statistical analyses to estimate the progenitor's direction and other key parameters. This rapid alert is critical for triggering a global multimessenger follow-up campaign, enabling a deep, coordinated analysis of the next Galactic supernova.

The presentation will focus on the current state of the network, its growing detector participation, and the ongoing efforts to advance its real-time analysis capabilities.

Speaker: Dr Andrey Sheshukov (Joint Institute for Nuclear Research, JINR)

ICHEP2026_SNEWSv2.pdf

3:30 PM Magnetic Field Effects on Shock Waves Produced During Stellar Core-Collapse

Core-collapse supernovae are traditionally modelled using hydrodynamic drivers, yet growing studies suggest that magnetic fields critically shape shock wave dynamics. In this work, the impact of magnetic fields on the dynamics of core-driven shock waves during the bounce phase of massive star collapse is investigated. By modelling the actual stellar core, the physical mechanism of shock wave production across a range of stellar masses is simulated more accurately. While a purely hydrodynamic collapse drives the shock through kinetic energy and thermal pressure, the inclusion of magnetic fields is predicted to introduce magnetic pressure that can affect the dynamics of the shock front. Simulating these processes within a magnetohydrodynamic (MHD) framework establishes a direct link between the progenitor’s magnetic field and the resulting shock behaviour. This study isolates the fundamental role of magnetic fields during the transition from the immediate bounce stage, with particular emphasis on the formation and early evolution of the core-driven shock.

Speaker: Magdeline Mohlao

ICHEP_CONFERENCE_SEABI_MM.pdf

4:15 PM → 4:45 PM Coffee break

4:45 PM → 6:15 PM Electroweak and Top Quark Physics

Conveners: Jorge de Blas (Universidad de Granada (ES)), Matteo Defranchis (CERN)

4:45 PM Top quark physics at FCC-ee and FCC-hh

The Future Circular Collider (FCC) programme provides unique opportunities for comprehensive and precise studies of top quark physics. At the FCC-ee, operating at and slightly above the top pair threshold, a precise measurement of the top quark mass with a statistical and systematic accuracy down to the MeV level can be achieved through a threshold scan. Furthermore, the FCC-ee run at 365 GeV allows precise determinations of top quark electroweak couplings, particularly the ttZ vertex with sub-percent precision, and enables stringent constraints on flavor-changing neutral currents (FCNC), such as the V$_{ts}$ coupling. At the FCC-hh, the unprecedented center-of-mass energy of 84 TeV enables precise differential measurements of top quark production processes at very high momentum transfer, such as top quark pairs and rare four-top final states. These high $Q^2$ measurements provide critical sensitivity to new physics effects at multi-TeV scales and will complement precision measurements from FCC-ee, thus offering a comprehensive exploration of the top quark sector.

Speaker: Krzysztof Mekala

Top_FCC_Mekala_ICHEP26.pdf

5:00 PM Investigating the toponium production in exclusive processes at the LHC and FCC

Over the last decades, the theoretical treatment and the experimental investigation of the $c\bar{c}$ and $b\bar{b}$ bound states have been largely advanced. In contrast, signals of a toponium state, formed by a top and an antitop quark, were only recently observed in $pp$ collisions at the LHC in inclusive processes, characterized by the fragmentation of the incident protons. In this contribution, we investigate the toponium production in exclusive processes, where the incident hadrons remain intact in the final state and can be tagged using forward detectors, with the toponium being produced by photon - photon, photon - Pomeron and Pomeron - Pomeron interactions. In particular, we consider $pp$, $pPb$ and $PbPb$ collisions at the LHC and FCC energies, and present our recent results for the rapidity distributions and total cross - sections, derived assuming that the toponium is a pseudoscalar or a vector $t\bar{t}$ state.

Speaker: Victor Gonçalves (Universidade Federal de Pelotas)

ICHEP2026_Victor.pdf

5:15 PM Two-photon interactions at the LHeC

An overview of the prospects for unique studies of photon-photon interactions at LHeC will be presented. Profiting from the clean experimental environment and high luminosity at the LHeC, it will be possible to conduct stringent tests of electroweak interactions as well as meaningful searches for possible deviations from Standard Model. In particular, the cases of two-photon production of pairs of W and Z bosons, tau leptons and supersymmetric particles will be discussed.

Speaker: Laurent Forthomme (AGH University of Krakow (PL))

ichep-hegg_forthomme.slides.pdf

5:30 PM Measuring hadronic vacuum polarization with the MUonE experiment at CERN

The MUonE experiment, now under development at CERN, aims to determine the leading-order hadronic vacuum polarization contribution to the muon's anomalous magnetic moment via a new, independent method. Similar hadronic effects contribute to the running of the QED coupling $\alpha$, which can be extracted from a precise measurement of the shape of the differential cross section for elastic scattering of high-energy muons from atomic electrons in a low-Z target. A Phase 1 test run of the experiment was completed in summer 2025, with the goals of confirming the leptonic part of the running of $\alpha$ and making a first measurement of the hadronic part with $\cal O$(20%) statistical accuracy. We will present the first preliminary results from this run and discuss the future plans.

Speaker: Roberto Tenchini (Universita & INFN Pisa (IT))

MUONE-ICHEP-2026 nb.pdf

5:45 PM Perspectives for studies of the HET physics at the muon-hadron collider at CERN

We will present the Higgs-Electroweak-Top (HET) physics potential of the proposed LH$\mu$C, an anti-muon-hadron collider at CERN [1,2]. By combining multi-TeV centre-of-mass energy with high luminosity, LH$\mu$C offers excellent conditions for exploring the HET physics. In the talk, we will report benchmark inclusive cross sections for Higgs production and for key top-quark processes, and highlight the resulting opportunities for precision Higgs-coupling studies and a broad electroweak programme. This will also include a discussion of the potential for studying the high energy photon-photon interactions at the LH$\mu$C. Finally, we will shortly overview the impact of a muon-hadron collider at the FCC-hh for the HET research [3].

References:
[1] D. Akturk et al., "μLHC: Antimuon ring and HL-LHC based μ+p collider", arXiv:2506.15445.
[2] Help4CERN Collaboration, "White Paper on High Energy, High Luminosity Lepton-Hadron Colliders at CERN", in preparation.
[3] K. Cheung and Z. S. Wang, "Physics potential of a muon-proton collider", Phys. Rev. D 103 (2021) 116009, arXiv:2101.10476.

Speakers: Help4CERN, Laurent Forthomme (AGH University of Krakow (PL))

het_at_lhuc_forthomme_ichep2026.pdf

4:45 PM → 6:15 PM Higgs Physics

Convener: David d'Enterria (CERN)

4:45 PM Cross section measurements at CMS, fermionic channels

We will discuss the latest inclusive and differential measurements of Higgs boson cross sections with the CMS detector in fermionic decay channels. The data collected during Run 3 of the LHC by the CMS experiment are used.

Speaker: Nazima Bi (Institute of High Energy Physics(CN))

ICHEP_26.pdf

5:00 PM Low-mass Higgs searches

We present searches for a resonance production in the diphoton final state with a mass lower than 125 GeV, predicted by several theoretical models beyond the standard one, as for example axion-like particles. Different possible production modes at the LHC are investigated.

Speaker: Elisa Fontanesi (CERN)

LMHiggsSearches-EF.pdf

5:15 PM Higgs boson decays into gauge bosons: theoretical predictions in radiative natural supersymmetry.

In this presentation, we study the rare decay process in which a Higgs boson decays into a Z boson and a photon. In the first part, we analyze the Standard Model (SM) contributions to the corresponding decay width, including the full leading-order result, two-loop QCD corrections, and the recently reported two-loop electroweak corrections, evaluated under four different renormalization schemes. In the second part of the talk, we analyze the leading-order contributions to the same process within the Minimal Supersymmetric Standard Model (MSSM). The spectrum of soft SUSY-breaking parameters and SUSY particle masses at the electroweak scale, which enter the computation of the one-loop amplitudes contributing to the decay width, is obtained by evolving the GUT-scale parameters of a Radiatively-Driven Natural Supersymmetry (RNS) model with non-universal Higgs boson masses. Variations of the RNS parameters can enhance the average SM prediction by up to 20%, reaching a value of 7.5 keV, while still satisfying the Higgs boson mass constraint. Finally, we are going to study the remaining loop-induced Higgs decays into gauge bosons withing the same region of RNS parameters.

Speaker: Dr Edilson Alfonso Reyes Rojas (Universidad de Pamplona)

ICHEP_2026_Edilson.pdf

5:30 PM Search for rare and lepton-flavor-violating Higgs boson decays at the ATLAS experiment

The Standard Model predicts several rare decay processes of the Higgs boson, including decay to a Z boson and a photon (H->Zgam), decay to a pair of muons (H->mumu), and decay to a pair of electrons (H->ee). The lepton-flavor-violating (LFV) decay of the Higgs boson, on the other hand, is forbidden in the Standard Model but allowed in new physics models. Search for rare and LFV decays of the Higgs boson could provide a stringent test of SM and serve as a powerful probe to new physics. This talk will present several results for Higgs boson rare decay searches based on LHC Run 2 and Run 3 data.

Speaker: Laura Nasella (Brandeis University (US))

Rare&LFVHiggsDecays_ICHEP2026_Nasella.pdf

5:45 PM Search for dimuon decay of Higgs Boson in ATLAS

This talk presents the search for the dimuon decay of the Standard Model Higgs boson (H→μμ) using 2022–2024 ATLAS Run 3 pp collision data at √s=13.6 TeV. The H→μμ channel probes the Higgs coupling to second-generation fermions despite its small branching ratio and challenging signal-to-background ratio. Multivariate techniques, including Boosted Decision Trees (BDTs) are used for event categorisation and signal discrimination. The results report an evidence for H→μμ with an observed (expected) significance of 3.42σ (2.46σ) at mH=125.09 GeV.

Speaker: Arisa Wada (Nagoya University (JP))

26_0801_Hmumu_ICHEP_uploaded.pdf

6:00 PM Theoretical calculations for ttH production

We calculate higher-order perturbative corrections for $t{\bar t}H$ production. By adding second-order and third-order soft-gluon corrections to NLO QCD and NLO electroweak (EW) results, we present total and differential cross sections at LHC energies through approximate N$^3$LO (aN$^3$LO) in QCD and NLO in EW. Our aN$^3$LO QCD + NLO EW results provide significant enhancements and a reduced scale dependence for the cross section and the top-quark transverse-momentum and rapidity distributions.

Speaker: Prof. Nikolaos Kidonakis

Kidonakis-ttH.pdf

4:45 PM → 5:30 PM Software, Computing and Data Handling

Conveners: Carla Marin Benito (University of Barcelona (ES)), Enrico Bothmann (CERN), Prof. Jianming Bian (University of California Irvine (US)), Kevin Pedro (Fermi National Accelerator Lab. (US)), Marco Giacalone (CERN), Phat Srimanobhas (Chulalongkorn University (TH)), Thiago Tomei Fernandez (UNESP - Universidade Estadual Paulista (BR))

4:45 PM CMS Open Data: Successes, Challenges, and Opportunities

Since the first release of open data from an LHC experiment by CMS in 2014 the CMS Open Data program has matured into a sustained pipeline of data to the public. These data (several petabytes of real and simulated collisions) have found extensive use in educational programs as well as in the larger research community. This talk will describe the content of CMS Open Data and how it has been used for education and research and its impact. It will also explore the challenges and opportunities ahead for data preservation and open access in CMS.

Speaker: Edgar Fernando Carrera Jarrin (Universidad San Francisco de Quito (EC))

ICHEP2026_CMSOpenData_ECarrera_1Aug2026.pdf

5:00 PM Celebi: a Novel Architecture for Reproducible and Preserved Physics Analyses

Reproducibility and transparency are increasingly critical in high-energy physics, where analyses rely on complex, evolving workflows and heterogeneous software environments. While existing initiatives such as the CERN Analysis Preservation portal and REANA provide essential infrastructure, the day-to-day management and long-term maintainability of individual analyses remain fragmented and analyst-dependent.

We present Celebi, a new analysis-management architecture and toolkit designed to support the full lifecycle of a physics analysis, from active development to long-term preservation. Celebi combines a descriptive and distributed workflow specification with a structured file-organization model and an immutable “impression” mechanism that captures versioned analysis states. A dedicated middleware layer, Yuki, translates high-level analysis logic into executable workflows for containerized backends, enabling seamless execution on platforms such as REANA using Snakemake.

By integrating workflow description, provenance tracking, execution, and preservation into a coherent framework, Celebi enables reproducible execution, transparent re-analysis, and flexible analysis evolution with minimal disruption to existing analyst practices. This approach provides a practical and scalable foundation for collaborative development and long-term analysis preservation in modern high-energy physics experiments.

Speaker: Mingrui Zhao (Peking University (CN))

celebi_ichep_v2.pdf

celebi_ichep_v2.pptx

5:15 PM A novel ATLAS analysis workflow to access detailed detector information for selected event reprocessing

The ATLAS detector produces a wealth of detector-level information for each recorded event. Standard calibration and reconstruction procedures reduce this information to physics objects that can used as input to most analyses; nevertheless, there are very specific analyses that need full information from some of the ATLAS subdetectors, extended (improved) calibrations and/or reconstruction algorithms. For these use cases, a novel workflow has been developed that involves the selection of events satisfying some basic criteria, their extraction in RAW data format using the EventIndex data catalogue and the associated Event Picking Server, and their specialised processing. This presentation describes the tools involved, the procedures followed, the problems encountered and the operational performance.

Speaker: Elizaveta Cherepanova (Nikhef)

ATLAS_EventIndex_Cherepanova.pdf

4:45 PM → 6:15 PM Technology Applications and Industrial Opportunities

Conveners: Tiago Motta Quirino, Tiago Quirino (Universidade do Estado do Rio de Janeiro (BR))

4:45 PM Development and implementation of high-voltage systems for the NICA accelerator complex

The NICA accelerator complex (JINR LHEP, Dubna) consists of a chain including an ion beam injector, transport channels, superconducting Booster and Nuclotron synchrotrons, a heavy-ion collider, and numerous detector systems. The high-voltage modules developed and created by the authors of the report have been successfully implemented in several systems that are part of the designated elements of the NICA complex. The report is dedicated to the features of the created high-voltage systems, describing the main technical solutions and results.

Speaker: Dmitriy Ponkin (JINR)

Ponkin DO ICHEP2026.pdf

5:00 PM Applied Research at the NICA Accelerator Complex: Technology Transfer, Applications, and Collaboration Opportunities

The talk covers key issues of industrial applications and technology transfer associated with the use of ion beams from the NICA accelerator complex developed at JINR. It presents selected examples of research and technology programs carried out within the Applied Research Infrastructure for Advanced Developments at the NICA FAcility (ARIADNA). The overall scope of applied research performed using NICA beamlines includes, but is not limited to, radiation protection in space, life sciences, radiation testing of microelectronics, ion-beam-based materials research, and novel approaches to accelerator-driven systems. The main user of NICA beam time for applied research is the ARIADNA Collaboration, established in 2022. The collaboration is open to research institutes, academic centers, universities, and industrial partners, and aims to provide a structured framework for joint applied studies. The talk focuses on the first results obtained during the test operation of the ARIADNA beamlines and discusses their potential transfer to various industrial sectors, including the space industry, materials engineering, radiation therapy technologies, etc. In addition, the presentation describes approaches to integrating ARIANDA beam time into the operation modes of accelerators comprising the NICA complex. Special emphasis is placed on ARIADNA’s mission to disseminate and deepen expertise in heavy-ion interactions with matter.

Speaker: Oleg Belov (Joint Institute for Nuclear Research)

ARIADNA_Oleg_Belov_01_08_2026 ICHEP_Brazil_SF.pdf

5:15 PM APPLIED RESEACHES AND FACILITY INFRASRUCTURE OF NICA ACCELERATOR COMPLEX

The NICA accelerator complex at Joint Institute for Nuclear Researches was developed for fundamental and applied researches. The NICA goals are providing of colliding beams for studies of hot and dense strongly interacting baryonic matter and spin physics. The NICA facility infrastructure consists of two collider rings designed for head –on heavy ion collisions and an injection complex, which included two linacs and two superconducting synchrotrons the Booster and Nuclotron. The applied researches, realized in NICA accelerator complex, are related to the test of micro- and nanoelectronic devices for radiation hardness, as well as to conduct radiobiological studies relevant to long-duration space missions. This paper presents the current status and capabilities of the applied researches at stations SOCHI, ISCRA and SIMBO and the corresponding beam transfer lines. Particular attention is given to the results of recent irradiation runs of decapsulated microchips with pulsed low-energy heavy-ion beams at energy 3.2 MeV/nucleon extracted from the linear accelerator at the SOCHI station. The capsulated microchips are irradiated on the station ISCRA by the beams extracted from Nuclotron at heavy ion energy of 150-500 MeV/n. The biological objects are irradiated at station SIMBO by ions at energy of 0.5-1 GeV/n.

Speaker: Evgeny Syresin (Joint Institute for Nuclear Researches)

Applied researches -NICA -Syresin.pdf

Applied researches -NICA -Syresin.pdf

Applied researches -NICA -Syresin.ppt

4:45 PM → 6:30 PM Strong Interactions and Hadron Physics

Convener: Beijiang Liu

4:45 PM Charmed-hadron properties and spectroscopy at LHCb

LHCb has collected the world's largest sample of charmed-hadron decays during the LHC Run 1 and 2 (2015-2018). For Run 3 (2022-2026), the LHCb detector has been upgraded to operate at fivefold larger instantaneous luminosity. We present recent findings on the production and decay properties of charmed hadrons, including the first results based on Run 3 data.

Speaker: Ao Xu (Universita & INFN Pisa (IT))

axu_natal_2608.pdf

5:00 PM Recent results of charm-hadron spectroscopy in beauty-hadron decays at LHCb

Charm-hadron spectroscopy provides an important platform for studying the strong interaction in the non-perturbative energy regime. When kinematically allowed, charm resonances can appear as intermediate states in multi-body beauty-hadron decays. The fully reconstructible decay topologies enable not only precise determinations of the masses and widths of charm resonances, while properly accounting for interference effects between overlapping states, but also the extraction of their spin–parity quantum numbers. This talk presents recent relevant results from the LHCb experiment.

Speaker: Lorenzo Capriotti (Universita e INFN, Padova (IT))

Capriotti_charm_spectroscopy_v3.pdf

5:15 PM Conventional Spectroscopy at LHCb

Spectroscopy of beauty and charm hadrons are excellent experimental probes into the dynamics within heavy flavour hadrons. Because beauty and charm quark masses are above the QCD scale, QCD models of excited charm and beauty hadrons are in the non-perturbative regime of QCD, which allows for relatively simpler models. These models can be compared to the excited B-hadron states found by the LHCb experiments, specifically excited Bc and Bs states, which will be presented in this talk.

Speaker: Shuqi Sheng (EPFL - Ecole Polytechnique Federale Lausanne (CH))

ICHEP_Conventional_Spectroscopy _Shuqi.pdf

5:30 PM Light Baryon Spectroscopy at BESIII

Based on the large samples of 10 billion J/ψ and 2.7 billion ψ(3686) events accumulated at the BESIII detector, the recent progresses on baryon spectroscopy, including the amplitude analyses of J/ψ$\to K \bar{\Sigma} \Xi$, ψ(3686)$\to p \bar{p} \pi^0$, ψ(3686) $\to p \bar{p} \eta$, and ψ(3686) $\to \Lambda \bar{\Sigma} \pi$, will be presented. The perspectives on the baryon spectroscopy at BESIII will also be discussed.

Speaker: Shuangshi Fang

ICHEP2026-light-baryon-fss-v2.pdf

5:45 PM Spectroscopy of heavy flavour mesons in CMS experiment

This talk summarizes everything happening in spectroscopy of heavy flavour mesons, in CMS experiment

Speaker: Sergey Polikarpov (NRNU MEPhI (RU) and LPI RAS (RU) and JINR)

Decay Animation

ICHEP2026_Polikarpov.pdf

6:00 PM Studies of hadron spectroscopy at Belle and Belle II

The Belle and Belle II experiments have collected a $1.6~\mathrm{ab}^{-1}$ sample of $e^+e^-$ collision data at center-of-mass energies near the $\Upsilon(nS)$ resonances. These data include a $19.2~\mathrm{fb}^{-1}$ sample of data collected at center-of-mass energies near the $\Upsilon(10753)$ resonance. We present several results related to the following processes: $e^+ e^-\to h_b(1P)\eta$, $e^+ e^-\to\chi_{bJ}\omega$, $e^+ e^-\to\chi_{bJ}\gamma$, and $\Upsilon$ decays to di-baryons. In addition, we present a measurement of the $B^{0}$ and $B^+$ meson mass difference, and a search for $X(3872)$ in $B^+\to (\chi_{cJ}\pi^0)K^+$ decays. We also present a study of the tetraquark $T_{c\bar{c}}(4430)^+$ and a search for the $T_{c\bar{c}}(4430)^0$, and a first study of $pp$ femtoscopy in narrow $\Upsilon(nS)$ decays.

Speaker: Soeren Andre Prell (Iowa State University (US))

Prell-ICHEP-QQbar.pdf

6:15 PM On Amplitude-Based IR-Improvement in Precision LHC/FCC Physics

Using IR-improvement of unintegrable singularities in the infrared regime via amplitude-based resummation in $QED X QCD ⊂ SU(2)_L X U_1 X SU(3)^c$ we present new results in the context of precision LHC/FCC physics. We focus on specific examples, such as the interplay between parton showers and the removal of QED contamination in PDF’s evolved from data at $Q_0^2\sim 2 GeV^2$ and used in the evaluating precision observables in $pp\rightarrow Z + X \rightarrow \ell\bar\ell + X’$. We discuss attendant new issues.

Speaker: Bennie Ward (Baylor University (US))

ICHEP2026qcdew.pdf

4:45 PM → 6:10 PM INCT CERN-Brasil New Outreach Activities

4:45 PM CERN - Brazil Exhibition and the Educational Objectives for Scientific Formation in Brazilian Public Schools

The challenge of approaching the particle physics theme in educational non-formal actions presents complex difficulties that refer to physics knowledge and the limited scientific formation of society. Therefore, within the National Institute of Science and Technology-CERN-Brazil, an itinerant exhibition is being organized that has as objectives to present the LHC experiments and discuss the Brazilian collaboration in this laboratory. The central idea of this proposal is to promote the cultural identity of the public, with special interest in school visits, whose aims is to build lasting bonds with physics knowledge. For this to occur, this exhibition is constituted of 5 modules that approach the themes about the knowledge of atomic and particle physics (module 1), the history of particle physics (module 2), the Alice, Atlas, CMS and LHCb experiments (module 3), CERN and society (module 4) and Hands On experiments (module 5). Elements such as the gender question, Latin American representativity and the cultural impact of CERN are some of the themes that permeate this proposal. The exhibition intends to travel to regions outside the big metropolis. We hope that these actions can promote renewed interest for particle physics and have relevant role in the scientific literacy of society

Speakers: Graciella Watanabe (Federal University of ABC), Dr Ivã Gurgel (Universidade de São Paulo), Marcelo Gameiro Munhoz (Universidade de Sao Paulo (USP) (BR))

outreach_conecta_cern.pdf

outreach_conecta_cern.pptx

5:00 PM Book Launch - Brasil at CERN

Speaker: Dr Ivã Gurgel (Universidade de São Paulo)

Brasil CERN - ICHEP.pdf

Brasil CERN - ICHEP.pptx

4:45 PM → 6:30 PM Beyond the Standard Model

Convener: Andre Lessa (Universidade de Sao Paulo)

4:45 PM Probing light neutralinos from pair-produced sleptons with displaced vertices at the high-luminosity LHC

We study light neutralinos ($\tilde \chi_1^0$) with masses ranging from 10 GeV to several hundred GeV within the framework of R-parity-violating (RPV) supersymmetry. These light neutralinos can be long-lived, decaying with a macroscopic displacement (order cm) inside the LHC main detectors. Complementing previous works on the subject, here we focus on their production through the electroweak pair production of left-chiral sleptons ($\tilde e_{L}$), with the signal process $pp\to \tilde e^+_{L} \tilde e^-_{L} \to e^+ \tilde \chi_1^0 e^- \tilde \chi_1^0$. In contrast to the previous study with a singly produced slepton, where the RPV coupling $\lambda'_{111}$ induces both the production and decay of the light neutralino, in our scenario the production proceeds through Drell-Yan-like processes that are essentially independent of RPV couplings. Correspondingly, we implement a displaced-vertex search strategy for which our numerical analysis shows that the high-luminosity LHC can probe $\lambda'_{111}$ values up to three orders of magnitude smaller, and neutralino masses up to about four times larger than those accesible in the previously studied single-slepton production scenario.

Speakers: Nicolas Neill, Nicolás A. Neill (Universidad Mayor)

ichep_2026_light_neutralinos.pdf

5:00 PM BSM physics opportunities at the FCC-ee

The electron-positron stage of the Future Circular Collider (FCC-ee) is a precision frontier factory for Higgs, electroweak, flavour, top quark, and QCD physics. It is designed to operate in a 91-km circular tunnel built at CERN, and will serve as the first step towards O(100 TeV) proton-proton collisions. In addition to an essential Higgs program, the FCC-ee offers unique and powerful opportunities to answer fundamental open questions and explore unknown physics beyond the Standard Model. Direct searches for long-lived particles, and indirect probes of new physics sensitive to several tens of TeV scale, will be particularly fertile in the high-luminosity Z run, where $8×10^{12}$ Z bosons are expected. The large data samples of Higgs bosons, W bosons, and top quarks in very clean experimental conditions will offer additional opportunities for discoveries at other collision energies. Three concrete physics cases with promising signatures at FCC-ee will be discussed: heavy neutral leptons (HNLs), axion-like particles (ALPs), and exotic decays of the Higgs boson. These three well-motivated cases motivate out-of-the-box optimization of experimental conditions and analysis techniques that could lead to improvements in other searches for new physics.

Speaker: Susan Shotkin Gascon-Shotkin (Centre National de la Recherche Scientifique (FR))

SuzanneBSMOpportunitiesICHEP2026Natal1aout26final.pdf

SuzanneBSMOpportunitiesICHEP2026Natal1aout26final.pptx

5:15 PM The Future Circular Collider as a Photon Collider

Two-photon interactions at high energies provide a clean environment to probe both precision Standard Model processes and well-motivated scenarios of physics beyond the SM. We present an overview of the Future Circular Collider (FCC) as a high-luminosity photon collider, exploiting quasi-real photon fluxes radiated by lepton, proton, and ion beams. We will first present the theoretical framework to describe photon–photon collisions at the FCC and highlight key physics opportunities enabled by the large equivalent-photon luminosities in all running modes. At FCC-ee, we focus on searches for axion-like particles (ALPs) in γγ→a→γγ and related exclusive final states, showing that realistic sensitivity studies significantly extend current bounds over a broad mass range. For the hadron-collider phase (FCC-hh), we highlight exclusive γγ→H production in ultraperipheral collisions as a flagship SM benchmark and present projected sensitivities to ALPs in pp, pPb, and PbPb collisions. We also outline ongoing studies of the sensitive of the photon-fusion mode to massive graviton-like states. These results establish the FCC as a multi-regime photon collider with a coherent program spanning precision SM measurements and a broad class of BSM searches, underscoring the central role of γγ physics in future collider strategies over very large ranges of masses and couplings.

Speaker: Patricia Rebello Teles (Brazilian Center for Physics Research - CBPF (BR))

ICHEP2026_FCC_Photon_Collider_RebelloTeles_dEnterria_final.pdf

5:30 PM Lepton Flavor Violating Higgs decays at the compact linear collider

The Compact Linear Collider (CLIC) is a proposed high-energy electron--positron collider designed to operate in multiple energy stages, providing a clean experimental environment for precision measurements and searches for physics beyond the Standard Model. With centre-of-mass energies extending up to several TeV and large integrated luminosities, CLIC offers excellent sensitivity to rare Higgs boson processes.

Lepton-flavor-violating Higgs decays are a well-motivated signature of physics beyond the Standard Model. A sensitivity study of these processes at CLIC is presented, focusing on final states with electron--muon, tau--muon, and tau--electron pairs. In the absence of an observed signal, expected 95\% CL upper limits on the branching fractions at the level of $10^{-4}$--$10^{-5}$ can be achieved, assuming integrated luminosities of $4\,\mathrm{ab}^{-1}$ at $\sqrt{s}=1.4~\mathrm{TeV}$ and $5\,\mathrm{ab}^{-1}$ at $\sqrt{s}=3~\mathrm{TeV}$.

Speaker: Francisca Garay Walls (Pontifical Catholic University of Chile (CL))

Charla_ICHEP2026.pdf

5:45 PM Searches for direct BSM signals with ILD concept at Higgs factories

Although the LHC experiments have searched for and excluded many proposed new particles up to masses close to 1 TeV, there are many scenarios difficult to be addressed at a hadron collider. This talk will review such scenarios and present the expectations for searches at the International Linear Collider (ILC), the Linear Collider Facility (LCF), the Cold Copper Collider (C3), the Compact Linear Collider (CLIC), the Hybrid Asymmetric Linear Higgs Factory (HALHF), or the Future Circular Collider (FCCee). The studies are based on the ILD concept, which, with some modifications, is well suited for all these options. These studies where mostly done for ILC and were carried out with the full SM background and machine-related background taken into account. Both background and signal were fully simulated in ILD simulation model, which is developed with input from prototypes beam tests. These full simulation results could also in many cases be recast to the modified conditions at other collider options. The cases discussed both searches for SUSY, better studied at the high energy Linear Colliders (LCF, ILC, C3, CLIC), and various models with feebly interacting particles (FIPs) where also the lower energy options (FCCee, HALHF) have their own merits.

Speaker: Emanuela Musumeci (University of Alabama (US))

ILD_BSM_ICHEP26_Musumeci.pdf

6:00 PM ATLAS Searches for Beyond the Standard Model Higgs bosons

The discovery of the Higgs boson with the mass of about 125 GeV completed the particle content predicted by the Standard Model. Even though this model is well established and consistent with many measurements, it is not capable of explaining some observations by itself. Many extensions of the Standard Model addressing such shortcomings introduce additional Higgs bosons or beyond-the-Standard-Model couplings to the Higgs boson. In this talk, the latest searches for BSM Higgs decays are reported.

Speaker: Xola Gugulethu Mapekula (Johannesburg)

ICHEP_ATLAS_BSM_3-2.pdf

ICHEP_ATLAS_BSM_3-2.pptx

4:45 PM → 6:15 PM Operation, Performance and Upgrade of Present Detectors

Convener: Marco Lisboa Leite (Universidade de Sao Paulo (USP) (BR))

5:00 PM The CGEM-IT detector of the BESIII experiment: first commissioning results

The CGEM-IT detector is the new inner tracker of the BESIII experiment, hosted at the BEPCII collider in IHEP, Beijing, PRC. The detector deploys three concentric cylindrical triple-GEMs and an innovative readout chain based on TIGER/GEMROCs readout. The detector was successfully installed in October 2024 as part of the BESIII and BEPCII upgrade program. The commissioning run started in May 2025, with dedicated data taking at the psi(2S) center-of-mass energy, which will be completed by the end of February 2026.
In this presentation, the core features of the CGEM-IT will be presented, along with some details of the installation and the first results of the commissioning run.

Speaker: Federico Matias Melendi (Universita e INFN, Ferrara (IT))

ICHEP26 CGEM-IT installation & performances.pdf

ICHEP26 CGEM-IT installation & performances.pdf

5:15 PM The CMS ME0 Triple-GEM Station: From Design Optimization to Performance

The High-Luminosity LHC (HL-LHC) will deliver proton–proton collisions at 5 to 7.5 times the nominal LHC luminosity, resulting in an average of 140 to 200 interactions per bunch crossing. To preserve efficient muon triggering and reconstruction in this high-background environment, the forward region of the CMS muon system will be upgraded with Gas Electron Multiplier (GEM) detectors and improved Resistive Plate Chambers (iRPCs).

A new six-layer Triple-GEM detector station, ME0, covering an area of approximately 60 m², will extend the pseudorapidity coverage of the CMS muon system from |η| < 2.4 to |η| < 2.8. The ME0 station will be installed behind the High-Granularity Calorimeter (HGCAL) during the third Long Shutdown (LS3, 2026–2029).

The ME0 detectors will operate in an environment with background rates reaching up to 150 kHz/cm², which required several design optimizations. In this contribution, the design evolution of the final ME0 detectors is presented, together with lessons learned from extensive and continuous detector testing. The status of mass production is reported, along with performance measurements obtained using cosmic-ray data and test-beam campaigns. The latter were performed at the CERN GIF++ facility, where the high-rate conditions expected at the HL-LHC are realistically reproduced.

Speaker: Seulgi Kim (University of Seoul (KR))

SKim_ICHEP2026.pdf

5:30 PM Operational Results of CMS GEM GE1/1 Station in LHC Run-3

The discovery of the Higgs boson by the ATLAS and CMS experiments marked the beginning of a new era of precision measurements at the Large Hadron Collider. To fully exploit its physics potential, the High-Luminosity LHC will operate at substantially increased luminosities, resulting in much higher radiation levels and event densities. In response, CMS is upgrading its forward muon system with Gas Electron Multiplier (GEM) detectors. To ensure efficient, selective, and precise muon reconstruction in the forward region (1.55 < |η| < 2.8), three new GEM-based stations, GE1/1, GE2/1, and ME0, are being installed. These detectors provide excellent spatial resolution, high-rate capability, and radiation tolerance, while complementing the existing CSC and RPC systems. In particular, the GE1/1 station, composed of 144 triple-GEM detectors arranged in super-chambers on both CMS endcaps, covers the range 1.55 < |η| < 2.18 and delivers high efficiency and robust performance, significantly enhancing muon triggering and tracking during Run-3 and beyond. This work presents an overview of the CMS muon spectrometer upgrade with GEM detectors, focusing on the operational experience and performance studies of the GE1/1 station.

Speaker: Simone Calzaferri (Yonsei University (KR))

20260801_scalzafe_ICHEP2026_V1.pdf

5:45 PM AugerPrime: Detector performance and analysis progress

The Pierre Auger Observatory has provided an unprecedented view of ultra-high-energy cosmic rays over the past two decades, combining a 3000 km² surface detector array with fluorescence telescopes to measure the energy spectrum, arrival directions, and composition of the most energetic particles in the Universe. These measurements have revealed a rich and increasingly detailed astrophysical picture, while also exposing persistent tensions between air-shower observations and hadronic interaction models. A central challenge for the field is now the determination of the mass of individual primary particles with high statistics, achievable only with the large exposure of the Auger surface array. Access to mass-sensitive observables requires the separation of the electromagnetic and muonic components of extensive air showers. This goal drives the AugerPrime upgrade, which transforms the Observatory into a multi-hybrid detector. Scintillator and radio detectors have been added to the existing water-Cherenkov stations, the dynamic range has been extended using small photomultiplier tubes, and station electronics have been upgraded to improve timing and signal resolution. In addition, underground muon detectors have been deployed in a denser sub-array. In this contribution, we present the performance of the upgraded detector and the current status of data analysis with AugerPrime.

Speaker: Carla Bonifazi

AugerPrimeBonifazi.pdf

6:00 PM Jet performance in Run 3 in CMS

The LHC managed to deliver more than 100/fb of integrated luminosity to ATLAS + CMS in both 2024 and 2025, and with this exceeded the expectations for Run 3. Data were collected with an average of 60 pileup interactions happening at the same bunch crossing, and thus challenging the CMS detector and jet reconstruction. We present the latest developments in pileup mitigation, jet calibration, and performance for LHC Run 3.

Speaker: Christine Angela McLean (The State University of New York SUNY (US))

20260730_JME.pdf

4:45 PM → 6:00 PM Astroparticle Physics and Cosmology

Convener: Ioana Codrina Maris (Univ. P. et Marie Curie (Paris VI) (FR))

4:45 PM Unique Properties of Daily Proton and Helium Fluxes up to 100 GV

We present the precision measurement of daily proton and helium fluxes in cosmic rays from May 20, 2011 to November 1, 2025 in the rigidity interval from 1.71 to 100 GV collected with the Alpha Magnetic Spectrometer (AMS) aboard the International Space Station. The proton and helium fluxes, and the helium to proton flux ratio exhibit variations on multiple timescales. In nearly all the time intervals from 2014 to 2018, we observed recurrent proton and helium flux variations with a period of 27 days. In the entire time period, we found that below ∼7  GV the helium flux exhibits larger time variations than the proton flux, and above ∼7  GV the helium to proton flux ratio is time independent. Remarkably, below 2.4 GV a hysteresis between the helium to proton flux ratio and the helium flux was observed at greater than the 7⁢𝜎 level. This shows that at low rigidity the modulation of the helium to proton flux ratio is different before and after the solar maximum.

Speaker: Lisa Romaneehsen (Christian-Albrechts-Universitaet Kiel (DE))

Romaneehsen_pHe_ICHEP.pdf

5:00 PM Determination of Anisotropy of Elementary Particles

Analysis of anisotropy of the arrival directions of galactic positrons, electrons and protons has been performed with the Alpha Magnetic Spectrometer on the International Space Station. This measurement allows to differentiate between point-like and diffuse sources of cosmic rays for the understanding of the origin of high energy positrons. The AMS results of the dipole anisotropy are presented along with the discussion of the implications of these measurements.

Speaker: Alberto Aceituno García (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))

AAceituno_ICHEP2026_ElementaryParticlesAnisotropies.pdf

AAceituno_ICHEP2026_ElementaryParticlesAnisotropies.pptx

5:15 PM Seasonal Variation of Cosmic Muons at Daya Bay using the Full Dataset

Mesons produced in cosmic-ray-induced hadronic cascades face two competing fates: they may either interact to initiate lower-energy hadronic showers or decay into muons. As atmospheric temperature rises, air density decreases, reducing the interaction probability of mesons and thereby enhancing their decay into muons. This results in a positive correlation between the underground muon flux and atmospheric temperature. The strength of this correlation varies with the depth of overburden, as the overlying rock preferentially attenuates low-energy muons—those originating from parent mesons that are less sensitive to temperature changes.
The Daya Bay Reactor Neutrino Experiment is well suited for studying this effect, featuring three underground experimental halls located at different depths. Using the full dataset comprising over 14 billion cosmic muon events recorded across these halls, we extract correlation coefficients for each site. We evaluated multiple analysis techniques employed in the literature to ensure robustness and consistency of our results. In this presentation, I will report the latest results including comparison with theoretical predictions as well as published results from other experiments.

Speaker: Mr Bangzheng Ma

Bangzheng_ICHEP2026_Seasonal Variation of Cosmic Muons at Daya Bay using the Full Dataset.pdf

5:30 PM Cosmic Anti-Protons and Properties of Elementary Particle Fluxes

Precision measurements by AMS reveal unique properties of cosmic charged elementary particles. In the absolute rigidity range ~60 to ~500 GV, the antiproton flux and proton flux have nearly identical rigidity dependence. This behavior indicates an excess of high energy antiprotons compared with secondary antiprotons produced from the collision of cosmic rays. More importantly, from ~60 to ~500 GV the antiproton flux and positron flux show identical rigidity dependence. The positron-to-antiproton flux ratio is independent of energy and its value is determined to be a factor of 2 with percent accuracy. This unexpected observation indicates a common origin of high energy antiprotons and positrons in the cosmos.

Speaker: Dr Senquan Lu (IHEP, CAS (CN))

pbar_ICHEP2026.pdf

4:45 PM → 6:30 PM (free room)

4:45 PM → 6:30 PM (free room)

4:45 PM → 6:30 PM (free room)

5:30 PM → 6:00 PM Artificial Intelligence, Machine Learning and Quantum Computing in HEP

5:30 PM Machine-learning based particle-flow algorithm in CMS

The particle-flow (PF) algorithm aims to provide a global event description for each collision in terms of the comprehensive list of final-state particles. It is of central importance to event reconstruction in CMS, and has been a focus of developments in light of planned high-luminosity running conditions with increased pileup and detector granularity. Existing implementations rely on extrapolating tracks to the calorimeters, correlating them with calorimeter clusters, subtracting charged particle energy, and inferring neutral particles from significant energy deposits. The high-luminosity LHC upgrade entails new challenges, including extending the algorithm to new detectors, maintaining computational efficiency under high occupancy, and porting to heterogeneous computing architectures to improve throughput. End-to-end machine learning approaches for event reconstruction have been proposed that optimize for the physical quantities of interest, are reconfigurable to new conditions, and can be deployed in heterogeneous accelerators. One such approach, the machine-learned particle-flow (MLPF) algorithm, consists of training a transformer model to infer the full particle content of an event from the reconstructed tracks and calorimeter clusters in a single pass. We discuss progress towards an improved implementation of the MLPF reconstruction, describing dataset generation, the ML approach, metrics used to assess reconstruction quality and integration with reconstruction software.

Speaker: Christine Angela McLean (The State University of New York SUNY (US))

MLPF_McLean.pdf

MLPF_McLean.pptx

5:45 PM Machine Learning for Hadronization

A fundamental part of event generation, hadronization is currently simulated with the help of fine-tuned empirical models. Motivated by the difficulties of these models, in this talk I'll present the efforts of the MLHAD collaboration in improving several aspects of hadronization modelling: observable selection via correlation modelling, parameter tuning and uncertainty quantification via autodifferentiation, and a proposed model alternative where the empirical model is replaced by a surrogate Machine Learning-based model to be ultimately data-trainable. I'll detail the current stage of development and discuss challenges and possible ways forward.

Speaker: Manuel Szewc

ICHEP_Szewc.pdf

7:00 PM → 9:00 PM Poster session: #2

ICHEP 2026 - Natal, Brazil - Instructions for Poster Presenters.pdf

7:00 PM Positron Emission Tomography with a liquid argon detector prototype

Positron Emission Tomography (PET) is a medical imaging technique used to detect, diagnose, and manage diseases such as cancer and heart disease. PET scans work by detecting coincident 511 keV photons produced by the decay of a radioactive isotope that is injected into a patient. Our group has recently shown that Liquid Argon Time Projection Chambers (LArTPCs), optimized for neutrino detection, are capable of detecting these decay products. Current work seeks to optimize and ultimately build a PET scanner that takes advantage of the fine spatial resolution and sensitive calorimetry that LArTPCs offer. Simulations suggest that the optimization of these detectors could improve image resolution. This poster will cover the simulation, experimental setup, and operation of a small-scale prototype that we plan to operate later this year.

Speaker: Marina Reggiani Guzzo

ichep26_poster_MGuzzo.pdf

7:01 PM Development of a Boron-coated THGEM-based Neutron Detector Prototype for Scalable and Cost-Effective Applications

The worldwide shortage of Helium-3 has intensified the search for alternative neutron detection technologies capable of combining high efficiency, robustness, and scalability. We present the development of a thermal neutron detector prototype based on Thick Gas Electron Multiplier (THGEM) technology coupled to enriched Boron-10 conversion layers. The detector exploits the $^{10}\text{B}(\text{n},\alpha)^7\text{Li}$ reaction to produce highly ionizing charged particles, which are amplified within the high-field regions of the THGEM holes, following the well-established micro-pattern gaseous detector principles.

The project encompasses the characterization of boron deposition on THGEM electrodes, optimization of multi-layer configurations to enhance detection efficiency, and experimental validation using calibrated neutron sources, supported by Geant4 and Garfield++ simulations. The inherent mechanical robustness, high-rate capability, and cost-effective PCB-based manufacturing of THGEM structures make this approach particularly attractive for large-area implementations.

Beyond applications in high-energy and nuclear physics experiments, the proposed technology shows strong potential for reactor instrumentation, spallation neutron sources, and neutron imaging systems, where scalable, gamma-tolerant, and economically sustainable detection solutions are required.

Speaker: Mr Guilherme Lickel (University of Campinas - Brazil)

Lickel_ICHEP_R1.pdf

7:02 PM The versatile TIGER chip: from HEP to X-ray imaging

For the BESIII inner tracker upgrade, a new Gas Electron Multiplier (GEM) detector has been developed. Its dedicated DAQ system is based on the TIGER (Torino Integrated GEM Electronics for Readout) ASIC for on-detector electronics, a 64-channel mixed-signal chip providing fully digital charge and time output. The off-detector FPGA-based GEMROC manages power and data processing.
The system's modularity and scalability were successfully demonstrated by reading the entire CGEM-IT with 160 TIGER ASICs and 22 GEMROCs. While designed for the CGEM-IT, TIGER proved its versatility in test-beams with µ-RWELL detectors for the Future Circular Collider (FCC). A new Front-End Board (FEB) hosting the TIGER will be tested in May 2026.
In the framework of the SPECTRE project, TIGER is being integrated with CZT sensors, established room-temperature semiconductors for ionizing radiation detection. SPECTRE aims to characterize a complete TIGER-CZT module for Single Photon Emission Computed Tomography (SPECT). This could represent an important result not only in demonstrating TIGER’s versatility, but also in terms of technological transfer from the HEP field to the medical applications.
This poster presents the latest TIGER integration results with MPGDs and provides a detailed description of the design, characterization, and performance studies of the innovative TIGER-CZT system.

Speaker: Federico Matias Melendi on behalf of the SPECTRE working group (Universita e INFN, Ferrara (IT))

Poster SPECTRE ICHEP26.pdf

Poster SPECTRE ICHEP26.png

7:04 PM Study of Dark Matter plus boosted Z/W±/h jet events in fully hadronic final states

In a scenario of the 2HDM+$a$ model in which the pseudoscalar mediator $a$ has a mass larger than that of the dark matter (DM) candidate and smaller than the masses of the heavy Higgs bosons, the heavy scalar states predominantly decay into the pseudoscalar $a$ in association with a $Z$, $W$, or Higgs boson. The pseudoscalar $a$ subsequently decays predominantly into dark matter particles, resulting in final states with significant missing transverse energy. This phenomenological study targets these signatures in fully hadronic final states, characterized by a boosted $Z/W^\pm/h$ jet plus missing transverse energy. Information from $b$-tagged jets is also exploited, as the study focuses on large values of $\tan\beta$, which enhance the couplings of the heavy scalar states to down-type fermions, particularly bottom quarks. This theoretical framework is capable of reproducing the observed dark matter relic density through $s$-channel annihilation of dark matter into Standard Model fermions. To discriminate the signal from the background among the different signal topologies, neural network models can be used to improve the sensitivity. These models receive as input information from the highest-$p_T$ AK8 jet, additional jets in the event, and the missing transverse energy.

Speaker: Matheus Costa Reis (Universidade do Estado do Rio de Janeiro (BR))

Poster_ICHEP_v2 (2).pdf

7:06 PM Constraining Gamma-ray Lines from Dark Matter Annihilation using CTAO data

Using the projected sensitivity of the CTAO with 500h of data to gamma-rays in the direction of the Galactic Center, we derive limits on the production of gamma-ray lines stemming from Dirac fermion dark matter. We use dimension 7 and dimension 8 effective operators to describe the dark matter annihilation and use the expected sensitivity to set lmits on the effective energy scale in terms of the dark matter mass. Our preliminary results shows that CTAO will probe energy scales that far excess the ones being probed at the Large Hadron Collider.

Speaker: Sabrina Brígida (Federal University of Rio Grande do Norte (UFRN))

Poster_ICHEP_Sabrina.pdf

7:08 PM Sensitivity of the photon-induced processes to the proton radius

We investigate the sensitivity of photon-induced dilepton production in proton-proton collisions to the proton charge radius. The analysis is performed using both momentum-space and impact-parameter formulations within the equivalent photon approximation, which have been shown to provide consistent results for exclusive processes. The proton structure is modeled through the electromagnetic form factor, and its impact is explored by varying the dipole parameter $\lambda^2$ corresponding to different proton-radius values ​​within the range reported by the Particle Data Group. In addition to the dominant electric contribution, the calculations also include the magnetic term in the proton form factor structure.

By comparing theoretical predictions with ATLAS and CMS measurements at $\sqrt{s} =$ 7 and 13 TeV, we quantify the current experimental sensitivity using a $\chi^2$ analysis. We show that the existing fiducial kinematic coverage significantly limits the ability to resolve differences between proton-radius scenarios, despite measurable effects at the few-percent level.
Our results indicate that exclusive dilepton production at the LHC provides a complementary and independent probe of the proton electromagnetic structure. We emphasize that extending the accessible kinematic range, particularly to forward rapidities and higher invariant masses, would substantially enhance sensitivity to the proton charge radius.

Speaker: Mariola Klusek-Gawenda (Institute of Nuclear Physics Polish Academy of Sciences)

poster_ICHEP2026.pdf

7:09 PM IceCube and the astrophysics of cosmic multi-messengers

High-energy astrophysical neutrinos are fundamental messengers for probing extreme processes in the universe, as their weak interactions allow them to travel vast cosmic distances without significant attenuation or deflection. The IceCube Neutrino Observatory, located at the South Pole, plays a central role in multi-messenger astrophysics by detecting neutrinos through Cherenkov light produced in interactions within Antarctic ice. This work presents an introductory theoretical study of neutrino physics and the detection and statistical analysis methods employed by IceCube. The project focused on reviewing the foundations of the Standard Model, with emphasis on weak interactions, scattering processes, and cross sections, as well as on the classification of event topologies observed by the detector. Additionally, we qualitatively analyze the evidence for neutrino emission from the active galaxy NGC 1068 (Messier 77), reported using more than a decade of IceCube data. We discuss the statistical techniques applied, including maximum-likelihood estimation and likelihood ratio tests, which are used to distinguish astrophysical neutrino signals from atmospheric backgrounds. The results highlight the significance of NGC 1068 as one of the most compelling neutrino sources detected to date and underscore the importance of the multi-messenger approach in understanding high-energy astrophysical sources.

Speaker: Maria Briani Lima (Unicamp)

poster_ICHEP.pdf

7:11 PM Azimuthal anisotropy and collective flow in O+O and Ne+Ne collisions at $\sqrt{s_{NN}}$ = 5.36 TeV with ATLAS

Measurements of azimuthal anisotropy in light-ion collisions provide a unique opportunity to study the onset of collective behavior in small QCD systems. This poster presents the first ATLAS measurements of flow harmonics $v_n$ (n = 2–4) in oxygen–oxygen (O+O) and neon–neon (Ne+Ne) collisions at $\sqrt{s_{NN}}$ = 5.36 TeV. The results are obtained using two-particle correlations, multi-particle cumulants, and template-fit techniques, allowing a detailed control of non-flow effects.

The $v_n$ coefficients are measured as functions of transverse momentum, event multiplicity, and collision centrality. Comparisons are made to corresponding measurements in p-Pb, Pb+Pb and Xe+Xe collisions to investigate the scaling of collective phenomena with system size. The light-ion systems probe an intermediate regime between small and large collision systems, offering sensitivity to initial-state geometry fluctuations and transport properties of the produced medium.

In particular, the O+O measurements provide sensitivity to possible subnucleonic structure, such as alpha-cluster configurations in the oxygen nucleus, while the Ne+Ne results offer insight into nuclear deformation effects. These measurements place new constraints on theoretical models of initial conditions and hydrodynamic evolution, and contribute to a deeper understanding of the emergence of collective flow in the smallest quark–gluon plasma–like systems produced at the LHC.

Speaker: Sebastian Julio Fuenzalida Garrido (Federico Santa Maria Technical University (CL))

ATL-COM-PHYS-2026-518v3.pdf

7:14 PM Simplified models for resonant neutral scalar production with boosted Z to quarks and missing transverse energy final states

We investigate simplified models where a scalar resonance ($\Phi$) produced in association with bottom quarks ($b\bar{b}$) decays into a $Z$ boson accompanied by missing transverse momentum ($p_T^{miss}$). Recent studies in the leptonic channel ($Z \to \ell\ell$) show limited sensitivity for $m_{\Phi} > 1$ TeV due to the low branching ratio ($\text{BR} \approx 6.7\%$). We propose exploiting the hadronic channel ($Z \to q\bar{q}$), with dominant $\text{BR} \approx 70\%$, to increase statistics. To mitigate the intense background (dominated by QCD and $t\bar{t}$), we focus on the boosted regime, reconstructing the $Z$ as a Large-R jet ($R=0.8$) and applying angular cuts ($\Delta\phi(J, p_T^{miss})$). The analysis will simulate CMS Run 3 conditions ($\sqrt{s}=13.6$ TeV, $\mathcal{L} \approx 300~\text{fb}^{-1}$) via MadGraph5, Pythia8, and Delphes, using jet substructure as a discriminant. We aim to establish new exclusion limits for the 2HDM+a model, demonstrating the hadronic channel's extended reach at high masses.

Speaker: Mr Miguel Lopes Cruz Rodriges (CBPF - Brazilian Center for Physics Research (BR))

Poster_ICHEP_Miguel_Lopes-15.pdf

7:15 PM Detailed derivation of the 3P0 strong decay model applied to baryons

This work examines the strong decay of a baryon through the 3P0 pair creation model. We simplify the transition matrix calculation via Feynman diagram equivalences and the selection of an appropriate coordinate system for the internal baryon structure, maintaining generality within the light quark spectrum and keeping an open path the explore the strange and heavy sector. The transition matrix is separated into color, flavor, spin and space contributions, calculating each one by itself. Different angular couplings are simplified using Racah algebra, determining which decays are allowed. We use a Gaussian expansion to approximate the radial wave functions of the particles and relate them with the size of them. We extend the work made in by J. Segovia in meson decays process, proving that the pair creation constant depends on the reduced mass of the pair created, having a good result for the decay of the Delta baryon into a pion and a nucleon. Using PDG data the decay with calculated is in a 1% difference with the lower experimental value. Finaly, we give a few paths of improvement, reviewing ways to obtain the wave functions of the baryons using Gausian Expansion Method and phenomenological potentials for the quark binding.

Speaker: Telmo Aguilar (Universidad San Francisco de Quito)

ICHEP poster - Telmo Aguilar.pdf

7:18 PM ND280++ - an Upgraded Near Detector for the Hyper-Kamiokande Experiment

The Hyper-Kamiokande (HyperK) experiment is a next generation neutrino oscillation experiment which aims to provide precision measurements of neutrino oscillation parameters. In order to achieve its physics goals, HyperK will require exceptional constraints on uncertainties relating to the modeling of neutrino-nucleus interactions, which will largely be provided by the ND280 near detector.

In particular, it will require extremely high resolution measurements of the final state particles from these interactions. Work is ongoing to investigate the feasibility of a future upgrade to ND280, known as ND280++, with a number of possible new sub-detectors under consideration.

One possible sub-detector is based on the LiquidO detector technology, which uses an opaque scintillator in order to stochastically confine light close to it's point of production, which is then read out via a grid of optical fibers. Such a detector could offer extremely fine position resolution while offering reduced construction challenges due to its homogeneous design. Furthermore, it offers the possibility of using water based scintillators which make it extremely appealing for use in HyperK due to the need to measure neutrino interactions on a water target.

Here, we present simulation studies of this detector and discuss the challenges that arise therein.

Speaker: Ewan Miller

ND280++ ICHEP 2026 Poster - Ewan Miller.pdf

7:19 PM Charmonium production in pO collisions at midrapidity with ALICE

In the earliest and hottest phase of ultra-relativistic collisions between heavy nuclei, a state of matter known as the Quark–Gluon Plasma (QGP) is expected to form, in which quarks and gluons, normally confined within hadrons, become deconfined. Quarkonium states provide sensitive probes of the production mechanisms and properties of the QGP. While this medium is predominantly produced in heavy-ion collisions such as Pb–Pb, measurements in smaller systems are essential to understand the underlying particle-production mechanisms. Proton–oxygen (pO) collisions studied at the LHC offer an opportunity to investigate the transition between cold and hot nuclear matter effects, including modifications of nuclear parton distribution functions, initial-state parton energy loss, nuclear absorption, and non-linear effects associated with gluon saturation, as described within the Color Glass Condensate framework. These measurements provide a baseline for interpreting QGP-related effects and a test ground for theoretical models.

This poster presents the analysis of inclusive $J/\psi$ production at midrapidity ($|y| < 0.9$) in pO collisions at $\sqrt{s} = 9.62~\mathrm{TeV}$. The charmonium states are reconstructed via the dielectron decay channel using the ALICE central barrel detectors.

Speaker: Luca Aguiar De Oliveira (University of Campinas UNICAMP (BR))

2026-07-28-ICHEP_v6_poster.pdf

7:21 PM Vertex activity study in νμCC0π interactions at the upgraded T2K near detector ND280

Exclusive neutrino interaction cross-section measurements in lepton and hadron kinematics have proven useful for the performance evaluation of theoretical models. Recently, measurements in calorimetric sums of hadron energies that include energy deposits by untracked hadrons (``vertex activity'') have been conducted by MINERvA and MicroBooNE. Such observables are particularly powerful to probe the region of low energy transfer to the nucleus, where observed discrepancies between data and theoretical models have been most pronounced. This poster details first physics results for such variables in $\nu_\mu$CC interactions without reconstructed pions in the final state ($\nu_\mu$CC$0\pi$), using the upgraded T2K Near Detector ND280 with the SuperFGD as a target. The significance of interaction-model dependent biases in the reconstruction caused by non-linearities in material effects that are introduced when applying standard unfolding methods will be discussed, and alternative strategies for the presentation of such measurements in a forward-folded manner will be shown.

Speaker: Katharina Lachner (ETH Zurich (CH))

ichep2026_poster_nd280_0piVA_vfin.pdf

7:23 PM Mapping analytical probabilities for invisible neutrino decay and implications for DUNE, JUNO, and atmospheric experiments

The invisible decay of the third neutrino mass eigenstate ($\nu_3 \to \nu_s + \phi$) is a well-motivated extension of the three-flavor oscillation paradigm. In recent years, several analytical frameworks have been developed to describe oscillation probabilities with matter effect in the presence of decay, incorporating different approximations: expansion in the small parameters $\alpha = \Delta m^2_{21}/\Delta m^2_{31}$ and $\sin\theta_{13}$, one-mass-scale-dominance, and exact or perturbative treatment of the decay width. However, the validity regimes of these different approximations across the wide range of energies and baselines probed by next-generation experiments remain to be systematically assessed. We present a comprehensive benchmark of existing analytical probability formulas against an exact numerical solution of the non-Hermitian Hamiltonian governing neutrino propagation with invisible decay. Our study covers multiple experimental regimes: long-baseline facilities (DUNE, NOvA), medium-baseline reactor experiments (JUNO), and the broad L/E range of atmospheric neutrinos (Hyper-Kamiokande, IceCube). We quantify the accuracy of each analytical approach and map the regions of parameter space where they remain valid, demonstrating the value of a robust numerical tool for assessing the domains of applicability of analytical approximations in future oscillation analyses.

Speaker: Alessandro Gusmão (Universidade Federal de Goiás)

7:25 PM Development of the Arapuca technology for hybrid Cherenkov and scintillation detectors for neutrino physics

The Arapuca technnology was pioneering in the use of dichroic filters as a light trap component of wide area photon counting devices in large liquid argon detectors for neutrino physics. It is the technology of choice for the SBND and DUNE experiments, and several of the R&D paths being explored for DUNE phase II are based on it as well. This talk will present the concept and initial development of a novel spin-off of the Arapuca concept aimed at the spectral separation of Cherenkov and scintillation photons. The goal is to achieve a class of detectors that is able to separate Cherenkov light from a larger flux of scintillation photons, with a modular, mostly flat design capable of maximizing geometrical efficiency in a real detector that may combine different technologies. Such a design may be used in future hybrid Cherenkov/scintillation detectors aimed at combining improved sensitivity in double beta decay searches and low energy solar neutrinos with high energy beam neutrinos.

Speaker: Prof. Ana Amelia Bergamini Machado (UNICAMP)

7:27 PM Neutrino scattering on electrons, nucleons and nuclei as a probe of neutrino electromagnetic interactions, neutrino spin oscillations and sterile neutrinos

Neutrino electromagnetic properties can be a manifestation of new physics [1]. We study their contribution to elastic neutrino scattering processes on various targets such as electrons, nucleons and nuclei. Following our approach developed earlier [2-5], in our formalism we account for possible electromagnetic form factors of massive neutrinos of both diagonal and transition as well as active-to-sterile types. Considering neutrinos from an astrophysical source arriving at a detector on Earth, we assume them to have arbitrary spin polarization due to effects of neutrino spin oscillations induced by neutrino magnetic moment interactions with magnetic fields both in the astrophysical source and in the interstellar environment. We present analytical and numerical results for the effects of neutrino electromagnetic properties, spin polarization, and sterile-neutrino mass.
[1] C. Giunti and A. Studenikin, Rev. Mod. Phys. 87, 531 (2015).
[2] K. Kouzakov and A. Studenikin, Phys. Rev. D 96, 099904 (2017).
[3] K. Kouzakov, F. Lazarev, and A. Studenikin, Phys. Atom. Nucl. 86, 257 (2023).
[4] K. A. Kouzakov, F. M. Lazarev, and A. I. Studenikin, Int. J. Mod. Phys. E 34, 2541001 (2025).
[5] K. A. Kouzakov, F. M. Lazarev, and A. I. Studenikin, Phys. Rev. D 111, 035025 (2025).

Speaker: Artem Popov (Moscow State University)

7:29 PM Neutrino-Nucleus Scattering Simulation Using GENIE Event Generator

This study investigates neutrino–nucleus cross sections using the GENIE Monte Carlo generator, focusing on the Relativistic Fermi Gas Model (RFG) and its modifications relevant to the DUNE energy. In the DUNE experiment, neutrino–nucleus interactions constitute one of the dominant sources of systematic uncertainty in the final neutrino physics analyses, making accurate modeling essential. The baseline RFG model treats nucleons as a gas of free particles. However, modified approaches incorporate nuclear binding effects and short- and long-range correlations. Using GENIE, we evaluate the impact of these improvements by implementing corrections that account for such nuclear effects, aiming to provide more precise cross-section predictions. Comparisons between the simulations and available experimental data are performed to assess model performance and to improve the understanding of neutrino–nucleus interactions in the DUNE energy regime.

Speaker: Luiz Felipe Brandao Magalhaes Rodrigues (Universidade Federal de Alfenas - UNIFAL)

Poster ICHEP Luiz Felipe (84x112)cm (1) (1).pdf

7:32 PM CMS Phase-2 Inner Tracker for the HL-LHC Upgrade

The High-Luminosity LHC (HL-LHC) will deliver an unprecedented dataset, enabling precision measurements of the Higgs sector and expanded searches for physics beyond the Standard Model. To fully exploit this potential, the CMS experiment will replace its entire tracking system during Long Shutdown~3. The Phase-2 tracker comprises a silicon pixel--based Inner Tracker and a new Outer Tracker, designed to operate efficiently in the challenging HL-LHC environment of high radiation, pileup, and data rates.

The Inner Tracker will sustain extreme operating conditions while providing improved spatial resolution, tracking efficiency, and vertex reconstruction. It is based on new hybrid pixel modules featuring fine-granularity sensors and advanced readout electronics, supported by innovative powering, cooling, and lightweight mechanical structures. The upgraded design extends tracking coverage to pseudorapidities of $|\eta| \approx 4$, significantly enhancing CMS acceptance in the forward region.

This contribution presents an overview of the CMS Phase-2 Inner Tracker, summarizes recent progress in prototyping and production, and outlines the path toward installation and commissioning, highlighting the expected impact on CMS physics performance at the HL-LHC.

Speaker: Christine Angela McLean (The State University of New York SUNY (US))

7:33 PM Development and automation of module testing for the ATLAS HGTD upgrade

The High Granularity Timing Detector (HGTD) is an upgrade of the ATLAS experiment for the High-Luminosity LHC that will instrument the forward region of the detector.
It will measure the time of arrival of particles with a resolution of 30-50 ps per track and provide an estimate of per-bunch luminosity, mitigating the contribution of pileup in the reconstruction of physics objects.
HGTD is composed of 8032 modules for a total of 3.6 million readout channels. Each module will need to be individually tested before the installation in the detector.

An FPGA-based readout system has been developed and recently scaled to readout 6 modules simultaneously, to match the assembly rate criteria imposed by the construction timelines.
A full suite of tests for the verification of the modules has been determined, and these test will need to be repeated multiple times for the assembly and integration phases of the detector construction, and will need to be conducted in the various assembly and integration sites.
A dedicated Graphical Users Interface (GUI) was developed to simplify and automate these tests, streamlining the test procedure and the interface with the HGTD database.

Speaker: Hendrik Smitmanns (Mainz)

ICHEP_ATLAS_HGTD_Testing_Poster_CDS_V4.pdf

7:34 PM New timing detectors for the CMS Precision Proton Spectrometer HL-LHC upgrade

The novel Trench-Isolated Low Gain Avalanche Diode (TI-LGAD) silicon sensors aimed for the upgrade of the timing system of the CMS Precision Proton Spectrometer at HL-LHC (PPS2) will be presented. The pre-production silicon wafer batch has been fabricated by Fondazione Bruno Kessler (FBK). Preliminary characterization results will be shown. Plans for module production will also be discussed.

Speaker: Valéria Vale (CBPF - Brazilian Center for Research in Physics (BR))

VVale_HL_LHC_CMS_PPS2_TILGAD_timing_detector_systems_upgrade.pdf

7:35 PM Calibration of GN2 jet-tagging algorithm using t¯t events from partial Run 3 pp collision data collected with the ATLAS detector

Talk Abstract Algorithms designed to identify the flavor of jets are an essential component of the ATLAS physics program, enabling the observation of Higgs boson decays to bottom quarks and high-precision measurements of the top quark. For the LHC Run 3 data-taking period, ATLAS utilizes GN2, a transformer-based, state-of-the-art jet-tagging algorithm. GN2 provides a significant improvement in the discrimination of b-jets from c-jets and light-flavor jets. To ensure the algorithm’s reliability, the predicted efficiency in simulation is compared with the efficiency measured in data, to calculate corrective scale factors (SFs). This calibration is performed using t¯t events across two channels: The dileptonic channel, which provides a high-purity sample of b-jets, is used for b-jet calibration, while the semi-leptonic channel is used to simultaneously calibrate both the b-jet tagging and c-jet mis-tagging efficiencies. These results are obtained from the partial Run 3 dataset corresponding to an integrated luminosity of 56 fb−1 taken at a center-of-mass energy of √s = 13.6 TeV.

Speaker: Wonho Jang (University of Tokyo (JP))

ICHEP_poster_ATLAS_btagcalibration_Taher_Wonho.pdf

7:38 PM Optimising $\nu_{\mu}$ Charged-Current Event Selections at the DUNE Near Detector Complex.

The Deep Underground Neutrino Experiment (DUNE) is a next generation long-baseline experiment designed with a primary goal of providing definitive measurements of the neutrino mass ordering and the Charge Parity (CP)-violating phase $\delta_{CP}$. A key component in reaching these goals is the DUNE Near Detector (ND) complex, placed 574 m from the beam target, and tasked with characterising the neutrino beam and constraining systematic uncertainties before oscillation effects occur. We will present primary findings from the development of an event selection for $\nu_{\mu}$ CC interactions within the ND liquid argon time projection chamber (ND-LAr). These findings will include a discussion of the importance of defining metrics, such as efficiency and purity, such that we can meet the required sensitivity for DUNE's physics measurements.

Speaker: Eva Sabater Andres (University of Sussex (GB))

ICHEP26_poster.pdf

7:41 PM Operational Experience with Multi-PMT Photosensors in a Water Cherenkov Test Experiment at CERN

A new photosensor module, the multi-PMT (mPMT), has been developed for the Intermediate Water Cherenkov Detector (IWCD) in the Hyper-Kamiokande (Hyper-K) experiment. Each module contains 19 three-inch PMTs housed within a watertight pressure vessel and integrated with custom readout electronics. Compared with the conventional 20-inch PMTs used in Super-Kamiokande and Hyper-K, mPMTs offer substantially better timing resolution, finer spatial granularity, and improved angular sensitivity.
In the Water Cherenkov Test Experiment (WCTE), a prototype detector operated at the CERN East Area T9 beamline, 97 mPMTs were deployed and evaluated from October 2024 to June 2025. This talk will describe the mechanical and electrical components involved in mPMT construction, the assembly process, and the quality assurance procedures developed for large-scale production. We will present key performance measurements, including timing, detection efficiency, and angular response calibrations using embedded LED systems within each PMT. Finally, we will share operational experience and lessons learned from approximately eight months of beamline operation, offering guidance for deploying mPMT-based systems in Hyper-K and future detectors.

Speaker: Mohit Gola (TRIUMF (CA))

ICHEP_Poster.pdf

7:42 PM Study of RPC waveforms parameters and classification of signals using Machine Learning

Resistive plate chambers (RPCs) are widely used in high energy physics. However, new regulations drastically reduce greenhouse gas emissions, including those used in RPCs. For this reason, the search for gas mixtures with lower environmental impact for use in these detectors is a priority within the gas detector community.

In this work, we present a study of the waveforms produced by RPCs, including an analysis using machine learning algorithms for signal classification. This tool will be used as a complementary method in the search for alternative mixtures, to improve understanding of the discharge processes of the candidates, and to complement traditional analysis methods.

Speaker: Dalmo Da Silva Dalto (Universidade do Estado do Rio de Janeiro (BR))

ichep_poster_HN2.pdf

7:43 PM Charge collection studies with Timepix4 at the Sirius Light source

Timepix4 is a hybrid pixel detector readout ASIC designed for high-rate detection of ionizing radiation. It simultaneously measures both ToA (time of arrival) and ToT (time over threshold) for each pixel in its matrix. Its time resolution is approximately 200 ps, which helps reduce pile-up effects and allows a more precise reconstruction of particle trajectories, since hits occurring a few hundred picoseconds apart can be distinguished instead of being merged into a single event. To study the detector’s response to well-defined and stable photon beams, we used a highly coherent X-ray beam provided by EMA (Extreme condition Methods of Analysis) beamline at Sirius synchrotron in Brazil. The data for the depletion depth studies were collected with the detector positioned at a grazing angle relative to the beam path so that the beam could cross the sensor and provide depth-sensitive information for characterizing the detector. Utilising grazing angle with x-rays is a new methodology that can provide additional information on depletion voltage while scanning over energy values provides absolute correspondence to time-over-threshold values.

Speaker: Mariah Clara Correa Barros F Pimentel (Federal University of Rio de Janeiro (BR))

ChargeCollection_Timepix4_Sirius.pdf

7:44 PM A Novel Lightguide for Glass Scintillators

Glass scintillators (GS) are considered for calorimeters in future experiments. SiPM is often chosen for the readout. A lightguide is needed to match the SiPM sensitive area to the surface(s) of the scintillator. In some detector designs, especially those with high granularity readout cells, there is little room for a traditional lightguide. For example, in the CEPC HCAL the current thinking is to couple 1, 2 or 4 SiPMs with a 40 mm x 40 mm x 10 mm GS tile. With 1 SiPM for 1 tile, the detector suffers from uneven and low-light collection. While the scheme of 4 SiPMs for 1 tile mitigates the problem, it greatly increases the cost for the readout electronics. We propose a novel lightguide design that wraps up the scintillator, taking up very little room between tiles. With strategically placed light coupling locations, this lightguide evens out the light collection, while increasing the efficiency for the scheme of 1 SiPM for 1 tile. Manufacturability and installation schemes are also taken into account for cost considerations. GEANT4 based simulation results will be presented at ICHEP, while we strive to obtain measurement results of a small prototype asap.

Speaker: Jingbo Ye (Chinese Academy of Sciences (CN))

poster_PLG.pdf

7:46 PM Photon/neutron discrimination in the ReD+ experiment

This work presents an optimized photon-neutron discrimination procedure developed during the commissioning of the neutron generator at the IFUSP Linear Accelerator Laboratory. The experimental setup employs an EJ-276D plastic scintillator for neutron detection and a silicon detector to tag $^3$He nuclei from deuterium fusion reactions. Time-coincident signals between the two subsystems are used to suppress accidental backgrounds from photons and scattered neutrons.

Pulse-shape discrimination was optimized through the $f_{\rm prompt}$ parameter, defined as the ratio of pulse integrals over prompt and total time windows. A data set of approximately $4.36\times10^5$ pulses was analyzed while scanning integration intervals to maximize the photon–neutron separation, quantified by the figure of merit. Gaussian fits to the $f_{\rm prompt}$ distributions and a dedicated cost function combining neutron loss and photon contamination were used to determine the optimal parameters in bins of deposited energy.

The resulting optimization yields photon contamination below 1% for energies above 75keV$_{ee}$ and provides a safe neutron selection threshold. The method is readily applicable to ReD, ReD+, and DarkSide-20k analyses.

Speaker: Pedro Zilves Maio Ventura (São Paulo University)

POSTERICHEP2026 (2).pdf

7:47 PM Micrometer-Precision Validation Bench for High Spatial Resolution Characterization of Scintillating Fibre (SciFi) Tracking Detectors

High-granularity scintillating fibre tracking detectors require precise and reproducible characterization of their front-end readout chain to ensure optimal spatial resolution and reliable operation in high-rate environments. This work presents a compact experimental framework designed for controlled excitation, signal acquisition, and performance evaluation of silicon photomultiplier (SiPM)-based scintillating fibre detector systems. The platform integrates a programmable multi-channel signal injection module, precision acquisition electronics based on the Citiroc-1A ASIC and CAEN FERS-5200 readout system, and parallel analog waveform monitoring, enabling comprehensive characterization of the detector electronic response under reproducible conditions. The system allows controlled generation of detector-like signals with adjustable amplitude, timing, and pulse shape, supporting systematic studies of charge reconstruction accuracy, trigger response, noise behavior, and timing stability. Correlation between injected analog waveforms and digitized outputs enables precise evaluation of readout performance and calibration parameters across the full dynamic range. The experimental results demonstrate linear charge reconstruction, stable trigger efficiency, and consistent timing response.
The framework provides a scalable solution for validation, calibration, and performance assessment of high-spatial-resolution scintillating fibre tracking detectors, supporting the development and operation of next-generation tracking systems in high-energy physics experiments.

Speaker: Andre Massafferri Rodrigues (CBPF - Brazilian Center for Physics Research (BR))

7:48 PM Search for Axions and Dark Photons Using Single Molecule Magnets

Molecular magnets, although analogous to familiar macroscopic magnets, offer a platform for next generation magnetic storage technologies with far higher data densities and prospective applications in quantum information science. When exposed to an external magnetic field, single molecule magnets enter a frustrated magnetic configuration that is exceptionally sensitive to low energy excitations. Energy deposited by a dark matter particle can trigger the relaxation of a metastable molecule, releasing Zeeman energy that subsequently propagates through neighboring molecules. This magnetic avalanche encodes the energy deposited in the initial excitation. By combining concepts from chemistry, condensed matter physics, and particle physics, we show that dysprosium and manganese molecules can achieve more than an order of magnitude improvement in sensitivity to dark photon and QCD axion models, respectively, compared with existing detection methods.

Speaker: Jose Roberto Alves Moura

SMMs banner.pdf

7:50 PM AI Agents Can Already Autonomously Perform Experimental High Energy Physics

AI coding agents can already autonomously execute most of an experimental high energy physics analysis pipeline. We demonstrate this with Just Furnish Context (JFC), a framework combining coding agents, literature-based knowledge retrieval, specification documents encoding HEP conventions, and multi-agent review. From a short physics prompt, Claude Code carries out event selection, background estimation, systematic uncertainty evaluation, statistical inference, and paper drafting, with no human intervention beyond an unblinding gate. We validate the framework on ALEPH, DELPHI, and CMS open data, performing electroweak, QCD, and Higgs measurements; the resulting reports are, at cursory expert review, indistinguishable from those of a junior graduate student. Rather than replacing physicists, such tools offload the repetitive technical burden of analysis development, freeing researchers for physics insight, method development, and validation.

Speaker: Andrzej Novak (Massachusetts Inst. of Technology (US))

poster-1.pdf

7:51 PM Studies with cosmogenic muons in the Skipper-CCDs of the CONNIE experiment

The skipper-CCDs used in the COherent Neutrino–Nucleus Interaction Experiment (CONNIE), operating at the Angra 2 nuclear power plant in Brazil, provide an interesting setup for the study of energy deposition by cosmogenic muons in silicon. These particles can be used to cross check the energy response of the sensors by comparing the measured and simulated shapes of the expected muon spectra in the silicon of the detector. Muon tracks can also be used to extract the depth-size relation of energy depositions in the silicon bulk that allows for 3-dimensional reconstruction of events due to the effect of charge diffusion. In this poster we show progress in the use of the CONNIE skipper-CCDs to perform these types of studies.

Speaker: Mauricio Sánchez Ramírez

ICHEP_Poster_MSR.pdf

7:52 PM Primary Vertex Reconstruction in sPHENIX: A Comparison of DCA-Based and Kalman Filter Approaches

Precise primary vertex reconstruction is critical for several measurements such as prompt particle identification and heavy-flavor measurements in the sPHENIX experiment. In this work, we present a detailed performance comparison of the standard sPHENIX primary vertex reconstruction algorithm with an alternative approach based on Kalman filtering. The standard method relies on DCA-based track selection, while the Kalman filter approach iteratively refines the vertex estimate using track covariance information. Both algorithms are evaluated using real and simulated sPHENIX events, with comparisons to truth-level vertices to assess vertex resolution, reconstruction efficiency, and computational performance. We further tune key primary vertexing parameters for each method to optimize reconstruction accuracy and stability. The impact of the original and optimized parameter sets is then studied in the context of prompt particle production, with a particular focus on the reconstruction of the ϕ→K^+ K^- decay channel. Finally, we examine how improvements in primary vertex determination propagate to downstream physics observables relevant for heavy-flavor analyses, including charmonium and bottomonium measurements. This study provides a quantitative assessment of DCA-based versus Kalman filter-based primary vertex reconstruction in sPHENIX, informing algorithm choices and parameter optimization for future precision heavy-ion and proton-proton analyses.

Speaker: Adeeb Saed

ICHEP_poster_SAED_07_28_26.pdf

7:55 PM Improving the sensitivity of the CONNIE experiment with convolutional neural networks

Next to the Angra 2 nuclear power plant reactor in Brazil, a particle physics experiment is operating. The Coherent Neutrino–Nucleus Interaction Experiment (CONNIE) employs Skipper-CCD sensors, with ultra-low readout noise, to search for coherent elastic antineutrino–nucleus scattering (CEvNS). The sensor is pixelated, producing images that contain the characteristic signatures of the interacting particles. One of the major challenges in the experiment’s data analysis is to extract and identify CEvNS candidate events, which generate electric charge in the sensor at a single point. These events can be mimicked by other particle interactions in the sensor or by spurious signals arising from detector artifacts and intrinsic background processes. Due to the charge diffusion process, these events can be characterized by the depth at which they were generated. This enables the definition of criteria to select events occurring in the bulk of the sensor, where background contamination is reduced. In an effort to improve the accuracy of candidate CEvNS event identification, a convolutional neural network was developed to estimate the interaction depth of point-like charge events based on their diffusion pattern. We present the performance of the network, which was trained and validated using simulated images.

Speaker: Ana Carolina Oliveira (Centro Brasileiro de Pesquisas Físicas)

poster_AnaCarolina_ICHEP_2026.pdf

7:57 PM Neutrino spin oscillations in spatially inhomogeneous magnetic fields of realistic astrophysical objects

The new analytic formula for the geometric phase arising due to neutrino interaction with spatially inhomogeneous magnetic fields was derived. The resonance conditions for the neutrino spin oscillations were studied in an exact realistic multipolar magnetic fields of different astrophysical objects. The present results continue the line of research presented in [A.Mukhamedshina, K.Stankevich, A.Studenikin, D.Wang, Neutrino Spin and Spin–Flavor Oscillations in Nondipolar Magnetic Fields of Astrophysical Objects, Phys.Atom.Nucl. 88 (2025) 2, 280-284].

Speaker: Alexander Studenikin

8:01 PM Amplitude analyses of charm decays

Amplitude analyses of multibody charm decays at LHCb offer a powerful framework to investigate their resonant substructure and the underlying strong-interaction dynamics. Using large samples of pp collision data, coherent amplitude models are employed to describe the interference of intermediate states across the available phase space. These studies allow the extraction of resonance parameters, relative phases, and fit fractions, providing essential input for precision studies of charm hadron spectroscopy and for measurements sensitive to CP violation.

Speaker: Gustavo Alejandro Loachamin Ordonez (Pontifical Catholic University of Rio de Janeiro (BR))

8:02 PM Electroweak corrections in the determination of strong coupling from hadronic tau decays

Inclusive hadronic tau decays, $\tau \rightarrow (\rm hadrons) + \nu_\tau$, are well described by QCD and provide a valuable source of information about the theory and its fundamental parameters, such as the strong coupling constant, $\alpha_s$. The extraction of the strong coupling from inclusive tau decays using Finite Energy Sum Rules (FESRs) is one of the most precise methods for determining this important parameter of the Standard Model. In this type of precision physics, the inclusion of subdominant effects, such as electroweak corrections, is essential because, although small, they can compete with certain non-perturbative contributions. However, electroweak corrections are not consistently included in current determinations of the strong coupling. In this work, we evaluate a class of these corrections to inclusive tau decays in a generalized form suitable for QCD sum-rule analyses. Once completed, these results will allow for a more precise determination of the strong coupling.

Speaker: João Pedro Dalpino Dias

poster_ICHEP_v3.pdf.pdf

8:03 PM Measurement of the J/$\psi$ Fragmentation Function in pp Collisions at $\sqrt{s} = 13.6$ TeV with ALICE

In this study, jets containing a J/$\psi$ among their constituents are identified, and the fragmentation function is defined as the longitudinal jet momentum fraction carried by the J/$\psi$ relative to the jet. Its measurement provides insight into quarkonium production, parton-shower dynamics, and their interplay.

The substantial upgrades of the ALICE detector in Run 3, in particular the implementation of continuous readout, provide a major increase in statistics for J/$\psi$ analyses at midrapidity. This significantly reduces uncertainties and enables fragmentation-function measurements with finer granularity and extended kinematic reach, offering valuable input for theoretical developments. Proton–proton collisions provide a clean environment and constitute a crucial baseline for heavy-ion and QGP studies, for which ALICE is optimized, where phenomena such as J/$\psi$ suppression and charm-quark recombination can be further investigated.

The observable will be presented separately for prompt and non-prompt J/$\psi$ mesons decaying into electron–positron pairs. Jets are reconstructed with the anti-k$_{\mathrm{T}}$ algorithm over a wide range of transverse momentum. The results will be compared with PYTHIA predictions and other state-of-the-art theoretical models.

Speaker: Lucas Ferrandi (University of Münster & University of São Paulo)

ICHEP26 Poster_v3.pdf

8:04 PM Data Structures and Algorithms for the Production of the ATLAS High-Granularity Timing Detector

The High-Granularity Timing Detector is being built as part of the ATLAS Phase-II upgrade. It is based on Low-Gain-Avalanche-Detector (LGAD) sensors and provides the time of tracks in the forward region. Assembly and testing sites use the Production Database (ProdDB) to track components with properties like measurements and relations. In this presentation, advancements in the production process and how each step interacts with the ProdDB will be explained. The central component type is the Module (assembled from a PCB glued on top of two Hybrids). Hybrids consist of a sensor bump-bounded to a readout chip (ASIC). We model the processes of module assembly, module loading onto support units, and detector assembly with quality control and automatic reporting. The ProdDB algorithms can guide the production process by suggesting parts matching certain criteria propagated through multiple layers of parent-child relations. When HGTD is assembled, the tools help e.g. identifying optimal flexible PCB cables (flex tails) to fit certain positions. For this purpose, HGTD is embedded via the “Slot“ table, a data structure for localization of parts and coordinate systems. An example use case is the Demonstrator, where the full production and DAQ chain can be tested on a reduced scale.

Speaker: Annika Stein (Johannes Gutenberg Universitaet Mainz (DE))

ICHEP_HGTD_DataStructuresAlgorithms_AnnikaStein.pdf

8:05 PM Online Trigger Studies for ALICE FoCal

The Forward Calorimeter (FoCal) is a proposed upgrade to the ALICE experiment at the LHC, designed to enable precision measurements of forward direct photons and neutral mesons, providing unique sensitivity to small-x QCD dynamics and gluon saturation effects. FoCal consists of a hybrid calorimetric system comprising an electromagnetic calorimeter (ECAL), built as a stack of absorber plates interleaved with high-granularity pixel and pad sensor layers, followed by a hadronic calorimeter (HCAL). This highly granular design is essential for photon identification but also makes the detector particularly sensitive to high particle occupancies.

Achieving these physics goals requires an efficient online event selection capable of operating under the high interaction rates and large background conditions foreseen for Run 4. In this context, a major challenge is to avoid busy violations arising from the saturation of the pixel layers in high-multiplicity events, which could otherwise limit data taking efficiency. This poster presents ongoing simulation studies of online trigger strategies for the ALICE FoCal detector, aimed at mitigating such effects. These studies demonstrate that an optimized online trigger is essential for maximizing the FoCal physics reach and represent a key component of the detector’s overall design and integration into the ALICE experiment.

Speaker: Mauro Rogerio Cosentino (Universidade Federal do ABC (BR))

PosterMauroVersaoFinal.pdf

8:06 PM Calibration of the JMS in the CMS Experiment Using Boosted W Bosons and Top Quarks

The hadronic jet mass and substructure are key variables for both standard model analyses and new physics searches that involve signatures with boosted particles -- Higgs and EW bosons, top quarks, and new physics particles. An accurate calibration of the Jet Mass Scale (JMS) is a key ingredient for CMS analyses targeting boosted W bosons and top quarks, particularly in the presence of modern deep-learning-based jet taggers. Simulation-to-data scale factor corrections are derived to account for residual mismodeling of jet mass in collision data, using the tag-and-probe technique and exploiting the substructure information using ParticleNet, as well as for its mass‐decorrelated (MD) version. We present here scale factor corrections valid for the pp collision data set at $\sqrt{s}$ = 13.6 TeV from the Run 3 data-taking of the CMS experiment.

Speaker: Julia Carvalho Leite (UNESP - Universidade Estadual Paulista (BR))

Poster_EPR___JMAR.pdf

8:07 PM Performance and longevity of CO2-based mixtures in CMS Improved Resistive Plate Chambers in the HL-LHC environment

Resistive Plate Chamber (RPC) detectors in the Compact Muon Solenoid (CMS) experiment operate with a gas mixture comprised of 95.2% of C$_2$H$_2$F$_4$, that provides a high number of ion-electron pairs, 4.5% of iC$_4$H$_{10}$, that ensures the suppression of photon-feedback effects and 0.3% of SF$_6$, used as an electron quencher to further operate the detector in streamer-free mode. C$_2$H$_2$F$_4$ is known to be a Greenhouse gas with a very high global warming potential (GWP) of 1430. Several alternatives to C$_2$H$_2$F$_4$ have been studied in the last few years. In this context, one short-mid term approach could be to focus on adding CO$_2$ in place of C$_2$H$_2$F$_4$. The studies are done at CERN Gamma Irradiation Facility (GIF++) in the North Area of SPS, where a 13.6 TBq radiation source and a muon beam from SPS are used to mimic the conditions of Phase-II of LHC. This work will present the performance and aging of a 1.4 mm gap RPC chamber with three different CO$_2$-based mixtures under a high gamma background, as well as the results after a second round of longevity period, integrating 80 mC/cm$^2$ of charge, almost 30% of the 300 mC/cm$^2$ expected for the High Luminosity LHC (HL-LHC) period.

Speaker: Joao Pinheiro (Universidade do Estado do Rio de Janeiro (BR))

ICHEP2026_CO2basedmixture.pdf

8:08 PM Search for direct CP violation in multibody D meson decays

In 2019, the LHCb experiment reported the first observation of CP violation in charm decays, using the channels $D^0 \to \pi^+\pi^-$ and $D^0 \to K^+K^-$. Measurements of additional decay modes are crucial to determine whether this effect is consistent with Standard Model predictions or indicates new sources of CP violation. We present a search for direct CP violation in multibody D meson decays using data collected by LHCb.

Speaker: Beatriz Moraes Vivacqua (Federal University of Rio de Janeiro (BR))

ICHEP_2026_Poster-4.pdf

8:09 PM Angular analysis of the B0 →K∗0(892)µ+µ−decay at √s = 13.6 TeV

This work presents a study of the angular distributions in the rare flavor-changing neutral current decay $B^{0}$→$K^{∗0}(892)$$μ^{+}$$μ^{−}$,using proton-proton collision data collected at a center-of-mass energy of $\sqrt s$ = 13.6 TeV. This specific decay channel is a key probe for Physics Beyond the Standard Model (BSM), as it allows for the extraction of several angular observables, such as the longitudinal polarization fraction of the $K^{∗0}$ meson ($F_{L}$) and the forward-backward asymmetry of the muons ($A_{FB}$), as well as the optimized $P_{I}^′$ observables.

The analysis focuses on measuring these parameters as a function of the dimuon invariant mass squared $q^2$, aiming to identify potential tensions with Standard Model predictions that could indicate the presence of new heavy particles or non-standard interactions. The results are compared with previous measurements from LHC experiments and theoretical calculations. With the increased energy and luminosity of the current data-taking period, this study provides a high-precision test of the b→sℓℓ transition in a new energy regime.

Speaker: Mr Thiago De Andrade Rangel Monteiro (Rio de Janeiro State University - (UERJ))

Poster ICHEP.pdf

8:12 PM Search for a Doubly Charged Scalar at the LHC and FCC-hh

Doubly charged scalars frequently emerge in many well-motivated extensions of the Standard Model, particularly in frameworks that aim to explain the origin of neutrino masses. Their distinct electric charge and clean leptonic signatures make them especially compelling from the standpoint of experimental searches. In this work, we explore the sensitivity of the LHC full run II, including photon-photon fusion, and Future Circular Collider in its hadron-hadron configuration (FCC-hh) to such states, assuming they decay promptly and exclusively into charged leptons either conserving or violating lepton flavor. We find that the FCC-hh, operating at 100 TeV, is uniquely positioned to probe doubly charged scalars with masses up to 7 TeV and possibly establish the mechanism behind neutrino masses.

Speaker: Letícia Guedes (UFRN)

8:14 PM Search for dark matter produced in association with a dark Higgs boson decaying into a bottom quark pair in proton-proton collisions at sqrt(s) = 13 TeV with CMS

The standard model of particle physics has been confirmed by many experiments, but it cannot explain some important phenomena, such as dark matter (DM). Astrophysical observations show that most of the matter in the Universe is made of dark matter, yet its nature is still unknown. If DM interacts with standard model particles, these interactions would involve a new mediator that could be produced at the Large Hadron Collider, offering a unique opportunity to study dark matter in the laboratory.

In this study, we focus on a class of new physics models with at least three new particles: a Z' boson mediator, a dark Higgs boson, and a Majorana fermion that is the DM particle. With those models as benchmarks, we report the results of a search for dark matter particles produced in association with a dark Higgs boson decaying into a bottom quark pair in proton-proton collisions at sqrt(s) = 13 TeV, analysing data collected by the CMS experiment corresponding to an integrated luminosity of 138 fb$^{-1}$.

Speaker: Thiago Tomei Fernandez (UNESP - Universidade Estadual Paulista (BR))

ThiagoTomei_ICHEP2026_Poster.pdf

8:15 PM LHCb VELO detector performance in LHC Run 3

The VErtex LOcator (VELO) detector is positioned around the beam interaction region of the Large Hadron Collider, as part of the LHCb experiment. It is fundamental to reconstruct primary vertices (PVs) from the collisions and secondary vertices from the decays of long-lived particles such as B and D mesons. It encompasses 52 modules carrying hybrid silicon pixel detectors, each carrying a 200 um n-on-p planar silicon sensor, with 55x55um channels readout by the Velopix ASIC capable of being readout at a rate of 30 MHz. These modules are separated from LHC’s primary vacuum by a lightweight RF-box, which also protects them from beam-induced RF perturbations. In this poster we present aggregated results concerning the VELO performance, in which we show how the excellent spatial resolution of the VELO, demonstrated by cluster finding efficiency higher than 99%, allows for accurate determination of charged particles trajectories, impact parameter resolution, and track finding efficiency.

Speaker: Victoria Ramos (Pontifical Catholic University of Rio de Janeiro (BR))

PosterVelo_v2.pdf

8:16 PM Analysis of Particle Identification Performance Using Time-of-Flight for the Future ALICE 3 Detector

The ALICE experiment at the LHC studies nuclear matter under extreme conditions, with focus on the quark–gluon plasma produced in heavy-ion collisions. The current ALICE detector will be decommissioned after Run 4 and, for Run 5, replaced by ALICE 3, a new experiment designed for higher interaction rates, improved precision, and an extended physics reach.

ALICE 3 is being conceived with a large pseudorapidity acceptance, a high-resolution silicon tracker, and dedicated subdetectors for particle identification, including strategically placed silicon time-of-flight (TOF) layers to complement the tracker.

This work investigates the expected performance of ALICE 3 using detailed simulations within the O² framework, focusing on the occupancy of the timing layers. A key objective is the optimization of the readout cell size, balancing time resolution, detector granularity, electronic noise, and channel count across different detector regions and collision centralities.

In parallel, the ACTS framework is being used to study charged-particle track reconstruction in the ALICE 3 geometry, with particular attention to efficiency and performance at low transverse momentum. These studies provide guidance for the optimization of the detector layout and reconstruction strategy for future ALICE 3 physics analysis.

Speaker: Levi Louro Stahl (Universidade de Sao Paulo (USP) (BR))

poster-ichep-v2_0.pdf

8:17 PM Development of a cosmic trigger system for CERN-GIF++

GIF++ (Gamma Irradiation Facility) is a multiuser facility operated at CERN to test particle detectors under realistic radiation and background conditions expected at the LHC (Large Hadron Collider). Combining a high-intensity 137Cs gamma source (10.5 TBq) with adjustable filters to vary the intensity and a high-energy muon beam (about 100 GeV/c).
A cosmic trigger to GIF++ is being developed, which will be essential to test detectors during the LS3 (Long Shutdown 3). LS3 is the period during which the accelerator complex will be shut down for more than three years (August/2026 until June/2030) to upgrade the machine for the HL-LHC (High Luminosity-LHC). This project includes simulation, design, and construction of the system from scratch. The path to this development starts from simulation, understanding the available detectors, and geometric acceptance, to understand the largest possible area covered, to the assembly and commissioning of the system. After this phase, testing, data collection, and analysis will be done. The idea is to allocate chambers at an angle to receive cosmic radiation, allowing electronic validation and detector testing in this environment. LHC experiments will use this new system during LS3, justifying the construction and testing before the shutdown.

Speaker: Katherine Maslova Gioseffi Defante (Universidade do Estado do Rio de Janeiro (BR))

iCHEP_PosterCosmicGIF++ (A0).pdf

8:18 PM Computational Optimization Strategies for DTL Cavity Design

The design optimization of Drift Tube Linac (DTL) cavities involves expensive black-box simulations, difficult constraints, and the absence of reliable derivative information. These characteristics make derivative-free optimization (DFO) methods particularly suitable, yet their practical performance in accelerator cavity design optimization remains insufficiently studied. This work presents a computational benchmark of DFO algorithms (BOBYQA, MADS, COBYLA, CMA-ES, and Bayesian approaches) applied to DTL cavity geometry optimization, evaluated within a unified benchmarking framework integrated with traditionally used simulation software, e.g., SuperFish and Parmila. We focus on practical optimization performance metrics, including robustness, sensitivity to numerical noise, convergence behavior, and computational cost. Our analysis aims to identify structural features of the problem that influence method performance and to suggest practical guidelines for algorithm selection in accelerator applications. In addition to benchmarking, this work aims contribute to the development of an optimization wrapper tailored to DTL cavity simulations, supporting extensible computational studies.

Speaker: Eduardo Ferrari

Eduardo_Ferrari_ICHEP2026.pdf

8:19 PM Lossless handling of FOS data for ATLAS DCS

The ATLAS Inner Tracker at the High-Luminosity LHC requires precise environmental monitoring to ensure detector safety and long-term performance. Humidity control is critical to prevent condensation and degradation of sensitive electronics operating at low temperatures. Fiber optic sensors are well suited for this task due to their immunity to electromagnetic interference and radiation tolerance.
This work presents the integration of fiber optic humidity sensors into the ATLAS Detector Control System. Optical interrogation units read the spectral response of Fiber Bragg Grating and Long-Period Grating sensors installed in the detector volume. Each raw spectral readout is about 400 MB per sensor, which would exceed 100 petabytes over ten years at one readout per minute for 50 sensors. A dedicated software package therefore performs spectral peak detection and converts wavelengths into humidity, temperature, and radiation dose using embedded calibration models. The processed data are reduced to about 10 kB per sensor per minute, corresponding to roughly 2.6 terabytes over ten years.
A QUASAR-based OPC-UA server publishes these values to the ATLAS WinCC OA DCS, enabling real-time monitoring, alarm handling, data archiving, and control actions. This provides a scalable approach for integrating advanced fiber optic sensing into large-scale detector control systems

Speaker: Xola Gugulethu Mapekula (University of Johannesburg (ZA))

atlas_itk_poster.pdf

8:20 PM zfit: general likelihood model fitting in Python

Model fitting using likelihoods is a crucial part of many analyses in HEP. zfit started over five years ago with the goal of providing this capability within the Python analysis ecosystem by offering a variety of advanced features and high performance tailored to the needs of HEP. After numerous iterations with users and a continuous development, zfit reached a maturity stage with a stable core and feature set.

In this talk, we will highlight the latest developments of the package. We will discuss its comprehensive feature set, which includes binned and unbinned fits, advanced model building and the ability to create custom models and a variety of available minimizers. Additionally, the talk will cover current and future backend strategies, leveraging TensorFlow and JAX, to deliver state-of-the-art performance on both CPUs and GPUs through extensive optimizations. Furthermore, we will explore the seamless integration of zfit into the broader Python HEP ecosystem, primarily with Scikit-HEP libraries, and its capability to serialize likelihoods in a human-readable format.

Speaker: Raul Grande Quartieri (CBPF - Brazilian Center for Physics Research (BR))

zfit_ICHEP2026_poster.pdf

8:21 PM Leptonic Modeling of 57 HSP Blazars and Their Detectability with CTAO

Active galactic nuclei (AGN) are astrophysical objects whose cores emit enormous amounts of energy with non-thermal spectra, ranking among the most energetic phenomena in the Universe. Numerous AGN subclasses have been defined based on their observational characteristics. Among these, blazars stand out as sources that emit relativistic jets oriented toward Earth. These jets consist of ionized matter beams accelerated to near-light velocities, radiating energetically across the entire electromagnetic spectrum. Modeling the emission spectrum of blazars through radiative processes of relativistic charged particles allows us to derive the non-thermal spectral energy distribution of these sources, infer information about particle acceleration mechanisms, investigate jet composition, and understand radiative emission processes. In this work, we perform leptonic modeling of 57 blazars classified as high synchrotron peaked (HSP) using the JetSet software. Subsequently, we investigate the detectability of these sources by the future gamma-ray telescope Cherenkov Telescope Array Observatory (CTAO) through observational simulations using the Gammapy software. The results provide insights into which HSP sources will be accessible to CTAO and guide the planning of future observational campaigns.

Speaker: Vinícius Mendonça (Universidade Federal de Campina Grande - UFCG)

ICHEP2026_WORK.pdf

8:22 PM Symplectic Realization of Generalized Snyder–Poisson Algebra

We investigate Snyder spacetime and its generalizations, including Yang and Snyder–de
Sitter spaces, which constitute manifestly Lorentz-invariant noncommutative geometries.
This work initiates a systematic study of gauge theory on such spaces in the semi-classical
regime, formulated as Poisson gauge theory. As a first step, we construct the symplectic
realizations of the relevant noncommutative spaces, a prerequisite for defining Poisson
gauge transformations and field strengths. We present a general method for representing
the Snyder algebra and its extensions in terms of canonical phase-space variables, enabling
both the reproduction of known representations and the derivation of novel ones. These
canonical constructions are employed to obtain explicit symplectic realizations for the
Snyder–de Sitter space and to construct the deformed partial derivative which differentiates
the underlying Poisson structure. Furthermore, we analyze the motion of freely falling
particles in these backgrounds and comment on the geometry of the associated spaces.

Speaker: Eduardo Lourenço Fabio de Lima (UFABC)

Ichepversãofinal.pdf

8:24 PM A Clifford algebraic derivation of the Standard Model

The Standard Model of particle physics is derived from the free Dirac Lagrangian. All known fermionic particle representations, plus three right-handed neutrinos, are obtained as Dirac spinors in 8-dimensional spacetime, with their rotations giving rise to the Standard Model gauge symmetries. The strong force and three particle families arise as manifestations of Spin(8) triality. Spacetime and gauge transformations become unified while avoiding the Coleman-Mandula theorem, with chirality stemming from orientation invariance in 8-dimensional spacetime.

Speaker: Goncalo Quinta (Instituto de Telecomunicações)

ICHEP_poster_Goncalo_Quinta.pdf

8:41 PM Greisen Refinement Validated Against CORSIKA: Sub-5% Agreement for 20–800 GeV Gamma Showers at High Altitudes

Extensive air showers from low-energy gamma rays (20–800 GeV) are key targets for high-altitude observatories such as HAWC (4100 m) and the proposed CONDOR Observatory (~5300 m), where reduced atmospheric depth shifts the shower maximum closer to ground level. The classical Greisen profile performs poorly in this regime due to neglected ionization losses, lower multiplicity, density variations, and zenith-angle effects.

We present a modified Greisen profile with an empirical correction to the shower age s and explicit zenith-angle dependence (via 1/cos θ in effective depth and age). These adjustments capture faster post-maximum absorption below ~87 MeV, altitude-dependent radiation lengths (5000–5900 m), and oblique path lengthening (up to ~1.3 at 40°).

Benchmarked on 1,008,000 CORSIKA showers (12 energies × 4 altitudes × 21 zenith angles × 1000 runs; EGS4, 1 MeV cutoff), the refined profile yields normalization deviations |α – 1| < 4.7% (vs. up to 12.5% for the classical profile, worst at large zenith angles).

The analytical form significantly improves energy reconstruction, detection efficiency, and gamma/hadron separation at high altitudes, offering a fast alternative to full Monte Carlo for real-time gamma-ray and cosmic-ray studies.

Speaker: Constanza Viviana Valdivieso Castillo (Federico Santa Maria Technical University (CL))

ICHEP Poster 1-ConstanzaValdivieso.pdf

8:45 PM Enhanced Greisen Formalism: Analytical Refinements and Zenith-Angle Dependence for Electromagnetic Air Showers

We present an enhanced analytical framework refining the classical Greisen formalism for modeling longitudinal development of electromagnetic air showers, achieving higher accuracy and broader applicability.

A modified slope function λ₁(s) with exponential correction and optimized coefficients provides agreement better than 0.75% with numerical solutions for 0.3 < s < 1.4. This improves predictions in the early phase (s < 1) and near/beyond shower maximum, preserving boundary conditions.

The updated particle multiplicity profile features a precise normalization prefactor of 0.326—derived from second-derivative evaluation and validated via companion slope function λ₂(s)—slightly differing from the traditional 0.31.

CORSIKA Monte Carlo simulations (1000 runs per energy point for 20–800 GeV gamma-ray primaries at 5300 m altitude) confirm the modified profile matches simulated evolution more closely than the original Greisen model.

Zenith angle dependence is incorporated via slant depth transformations, enabling accurate modeling of inclined showers. Relevant for high-altitude observatories like CONDOR, inclined showers show significant variations in detected particle numbers due to observation closer to maximum at reduced depth.

Combining analytical simplicity with improved precision, this formalism suits air shower simulations and fitting tools across diverse energies and geometries.

Speaker: Constanza Viviana Valdivieso Castillo (Federico Santa Maria Technical University (CL))

ICHEP Poster 2-ConstanzaValdivieso.pdf

Sun, August 2

8:30 AM → 6:30 PM Social: Free time (Excursions can be arranged with the travel agency in the lobby area)

8:30 AM → 6:30 PM Satellite meetings: C11

Convener: Marcelo Gameiro Munhoz (Universidade de Sao Paulo (USP) (BR))

1:00 PM → 6:30 PM Satellite meetings: ICFA

Conveners: Pierluigi Campana (Frascati), Pierluigi Campana (Laboratori Nazionali di Frascati (LNF)), Thomas Schorner (Deutsches Elektronen-Synchrotron (DE))

Mon, August 3

7:00 AM → 8:30 AM Registration

8:30 AM → 8:35 AM ICHEP2026: Welcome - https://youtube.com/live/NOTWuH_tK90?feature=share

Closing ICHEP 2026.pdf

ICHEP2026 Poster Awards.pdf

ICHEP2028_Thailand.pdf

8:35 AM → 10:15 AM Plenaries: https://youtube.com/live/NOTWuH_tK90?feature=share

Conveners: Irina Nasteva (Federal University of Rio de Janeiro (BR)), Marco Lisboa Leite (Universidade de Sao Paulo (USP) (BR))

8:35 AM ATLAS highlights

Speaker: Kerstin Tackmann (Deutsches Elektronen-Synchrotron (DE))

2026-08-03-ATLAShighlights.pdf

9:00 AM CMS highlights

Speaker: Andreas Meyer (DESY)

CMS_Highlights_ICHEP26_ameyer.pdf

9:25 AM ALICE highlights

Speaker: David Dobrigkeit Chinellato (Austrian Academy of Sciences (AT))

DDChinellato-ICHEP2026-39.pdf

9:50 AM LHCb highlights

Speaker: Patrick Robbe (Université Paris-Saclay (FR))

LHCb_ICHEP_3Aug2026.pdf

10:15 AM → 10:45 AM Coffee break

10:45 AM → 11:35 AM ICHEP2026: Opening Ceremony - https://youtube.com/live/VSwVQNR9SQg?feature=share

Conveners: Prof. Ignacio De Bediaga Hickman (CBPF - Brazilian Center for Physics Research (BR)), Rogerio Rosenfeld (UNESP - Universidade Estadual Paulista (BR))

Closing ICHEP 2026.pdf

ICHEP2026 Poster Awards.pdf

ICHEP2028_Thailand.pdf

11:35 AM → 12:25 PM Plenaries: https://youtube.com/live/VSwVQNR9SQg?feature=share

Convener: MAURO Cosentino (Universidade Federal do ABC (BR))

12:00 PM Higgs experimental highlights

Speaker: Meng Xiao (ZJU - Zhejiang University (CN))

HiggsSummaryICHEP.pdf

12:25 PM → 2:00 PM Lunch

2:00 PM → 3:40 PM Plenaries: https://youtube.com/live/JYCOMUpyRAU?feature=share

Conveners: Farinaldo Queiroz, Murilo Santana Rangel (Federal University of Rio de Janeiro (BR))

2:00 PM New results from electron-positron heavy flavor factories

Speaker: Xiaodong Shi (IHEP)

xiaodong-ichep.pdf

2:25 PM Recent developments in dark matter theory

Speaker: Alejandro Ibarra (Technical University of Munich)

Ibarra_ICHEP.pdf

2:50 PM Dark matter searches

Speaker: Prof. Björn Penning (University of Zurich)

ICHEP_DM_Penning_v1.pdf

3:15 PM Feebly interacting particles searches

Speaker: Jonathan Lee Feng (University of California Irvine (US))

260803ichep_Feng.pdf

3:40 PM → 4:10 PM Coffee break

4:10 PM → 6:40 PM Plenaries: https://youtube.com/live/0yNPNRRFmaA?feature=share

Conveners: Dr Andre Fabiano Steklain Lisboa, Carla Bonifazi, Yara Do Amaral Coutinho (Federal University of Rio de Janeiro (BR))

4:10 PM Highlights from the Pierre Auger Observatory

Speaker: Alberto Daniel Supanitsky

SupanitskyICHEP2026.pdf

4:35 PM AMS Highlights

Speaker: Andrei Kounine (Massachusetts Inst. of Technology (US))

AMS_AK.pdf

5:00 PM New developments in multimessenger astrophysics

Speaker: Prof. Miguel Mostafa

Mostafa-MMA-0802.pdf

5:25 PM Observational cosmology: recent results and future prospects

Speaker: scott dodelson (fermilab)

ichep_dodelson.pptx

5:50 PM Gravitational waves: recent results and future prospects

Speaker: Marcelle Soares-Santos (University of Zürich)

Soares-Santos_1

6:15 PM Theoretical developments in Higgs physics in SM and beyond

Speaker: Carlos Wagner

WAGNER-ICHEP-26.pdf

6:40 PM → 7:30 PM Plenaries: Palestra de Divulgação Científica - https://youtube.com/live/RPilgl7Q7qU?feature=share

6:40 PM Astronomia com ondas gravitacionais: colocando trilha sonora no filme mudo do universo

Há milhares de anos observamos o universo através da detecção de luz. Recentemente, avanços tecnológicos nos permitem detectar também ondas gravitacionais. Nesta palestra, apresento uma visão geral do impacto desses avanços, em particular da cominação desses dois mensageiros cósmicos, luz e ondas gravitacionais, para produzir novas descobertas.

Speaker: Marcelle Soares-Santos (University of Zürich)

Soares-Santos_2

Tue, August 4

8:30 AM → 9:50 AM Plenaries: https://youtube.com/live/MUb1d-g9VgQ?feature=share

Conveners: Prof. Ana Amelia Bergamini Machado (UNICAMP), Sandra Amato (Federal University of Rio de Janeiro (BR))

8:30 AM Neutrino theory: open questions and opportunities

Speaker: Andre De Gouvea

ICHEP_2026.pdf

9:00 AM Neutrino properties from long baseline experiments

Speaker: Dr Stephen Dolan (CERN)

SDolanICHEP2026_v2_PDFVersion.pdf

SDolanICHEP2026_v2.pptx

9:25 AM Neutrino properties from short baseline experiments

Speaker: Zeyuan Yu

Neutrino properties for ICHEP 2026.pdf

9:50 AM → 10:05 AM Group photo

10:05 AM → 10:30 AM Coffee break

10:30 AM → 12:25 PM Plenaries: https://youtube.com/live/OrGnSW48gkw?feature=share

Conveners: Danielle Moraes (N7 Ventures), Ricardo Gomes (Universidade Federal de Goias)

10:30 AM High Energy Physics in Latin America

Speakers: Prof. Ignacio De Bediaga Hickman (CBPF - Brazilian Center for Physics Research (BR)), Rogerio Rosenfeld

RosenfeldICHEP_03-08-26.pdf

10:45 AM Recent results in neutrino mass and neutrinoless double beta decay

Speaker: Julieta Gruszko

Gruszko_ICHEP2026_nuMass_DBD.pdf

11:10 AM Astrophysical and cosmological neutrinos

Speaker: Yvonne Wong

YYYWong.pdf

11:35 AM New developments in detector technologies (including quantum sensing)

Speaker: Ettore Segreto (University of Campinas UNICAMP (BR))

segreto_ICHEP_2026_v5.pdf

12:00 PM Technological spin-offs and industrial applications

Speaker: Antonio José Roque da Silva (CNPEM)

roque-ichep-2026.pdf

12:25 PM → 2:00 PM Lunch

2:00 PM → 3:40 PM Plenaries: https://youtube.com/live/oHKEDAMg68A?feature=share

Conveners: Clemencia Mora Herrera (CBPF - Brazilian Center for Physics Research (BR)), Sandra Padula (UNESP - Universidade Estadual Paulista (BR))

2:00 PM Quantum information science in particle physics

Speaker: Prof. Ying-Ying Li (Institute of High Energy Physics, CAS)

ICHEP-2026-YYL.pdf

2:25 PM New initiatives on education and outreach in HEP

Speaker: Dr Kate Shaw (University of Sussex (GB))

ICHEP EDU&OUT HEP AUG 2026.pdf

ICHEP EDU&OUT HEP AUG 2026.pdf

2:50 PM Diversity and equitable opportunities

Speaker: Flavia de Almeida Dias (Nikhef National institute for subatomic physics (NL))

FDias_ICHEP2026.pdf

3:15 PM Sustainability in HEP

Speaker: Juliette Alimena (DESY)

SustainabilityInHEP_ICHEP_4Aug2026.pdf

3:40 PM → 4:10 PM Coffee break

4:10 PM → 6:45 PM Plenaries: https://youtube.com/live/6xYeHhjjFDE?feature=share

Conveners: Andre Lessa (Universidade de Sao Paulo), Leandro Salazar De Paula (Federal University of Rio de Janeiro (BR)), Patricia Magalhaes (UNICAMP)

4:10 PM Exploring the frontier: theoretical insights into new physics

Speaker: Fernando Quevedo

ICHEP_2026 (1).pdf

4:35 PM New results on BSM searches from the LHC

Speaker: Reina Coromoto Camacho Toro (LPNHE-Paris CNRS/IN2P3)

20260804_ICHEP2026_BSMLHC_CamachoToro.pdf

5:00 PM New developments in hadron physics

Speaker: Jose Pelaez

ICHEP_Talk_JRPelaez_compact_v1.pdf

5:25 PM Top quark physics experimental highlights

Speaker: Marco Vanadia (Universita e INFN, Roma II (IT))

vanadia_ICHEP.pdf

5:50 PM Report on the European Strategy on Particle Physics

Speaker: Hugh Montgomery

ESPP_ Report and Recommendations ICHEP 2026 -1.pdf

7:00 PM → 10:00 PM Social: Conference dinner

Wed, August 5

8:30 AM → 10:15 AM Plenaries: https://youtube.com/live/lf09uu1tqOQ?feature=share

Conveners: Andre Sznajder (Universidade do Estado do Rio de Janeiro (BR)), Ulisses De Freitas Carneiro Da Graca (CBPF - Brazilian Center for Physics Research (BR))

8:30 AM Present and approved accelerator facilities

Speaker: Mike Lamont (CERN)

Acc-facilities-Lamont-ICHEP26.pdf

Acc-facilities-Lamont-ICHEP26.pptx

9:00 AM Directions in computing, software and data handling

Speaker: Harvey Newman (California Institute of Technology (US))

ICHEP2026_FutureComputingNetworkingAIML_HBN080426.pptx

9:25 AM Advances in Machine Learning applications in HEP

Speaker: Philip Coleman Harris (Massachusetts Inst. of Technology (US))

PCH_AI_ICHEP_03_08_nobackup.pdf

PCH_AI_ICHEP_03_08_nobackup.pptx

9:50 AM Electroweak physics experimental highlights

Speaker: Yurii Maravin (Kansas State University (US))

EWK Highlights.pdf

10:15 AM → 10:45 AM Coffee break

10:45 AM → 12:25 PM Plenaries: https://youtube.com/live/bp6oNNAjF5I?feature=share

Conveners: Erica Polycarpo Macedo (Federal University of Rio de Janeiro (BR)), Sandro Fonseca (Universidade do Estado do Rio de Janeiro (BR))

10:45 AM Flavour physics: theoretical perspective

Speaker: Gino Isidori (University of Zurich (CH))

ICHEP3_GI-3.pdf

11:10 AM Quark flavour physics experimental overview

Speaker: Carla Gobel Burlamaqui De Mello (Pontifical Catholic University of Rio de Janeiro (BR))

ICHEP2026_CarlaGobel.pdf

11:35 AM Charged lepton flavor and EDM experiments

Speaker: Tsutomu Mibe

ICHEP2026-mibe-compressed.pdf

12:00 PM Theoretical developments in nonperturbative QCD

Speaker: Andreas Kronfeld

ichep.pdf

12:25 PM → 2:00 PM Lunch

2:00 PM → 3:55 PM Plenaries: https://youtube.com/live/EL02GEpaOEg?feature=share

Conveners: Antonio Vilela Pereira (CBPF - Brazilian Center for Research in Physics (BR)), Carsten Hensel (CBPF - Brazilian Center for Physics Research (BR))

2:00 PM High-energy QCD experimental highlights

Speaker: Michael Pitt (CERN)

QCD_Highlights_MPitt.pdf

2:25 PM Recent theoretical developments in heavy-ion physics

Speaker: Dr Wilke Van Der Schee (CERN)

Talks_Natal26.pdf

Talks_Natal26.pptx

2:50 PM Heavy-ion physics experimental highlights

Speaker: Fabrizio Grosa (CERN)

ICHEP2026_hi_physics_fgrosa.pdf

3:15 PM New developments in formal aspects applied to HEP

Speaker: Alex Pomarol (Universitat Autonoma de Barcelona & IFAE)

ICHEP 26.pdf

3:40 PM Lightest 0-+ glueball as dominant constituent of X(2370)

Speaker: Shan Jin (Nanjing University (CN))

X2370-ICHEP2026.pdf

3:55 PM → 4:25 PM Coffee Break

4:25 PM → 4:55 PM Plenaries: https://youtube.com/live/YDaAprbKUmw?feature=share

Convener: Marcelo Gameiro Munhoz (Universidade de Sao Paulo (USP) (BR))

4:25 PM IUPAP C11 Report

Speaker: Marcelo Gameiro Munhoz (Universidade de Sao Paulo (USP) (BR))

ICHEP2026_Munhoz.pdf

ICHEP2026_Munhoz.pptx

4:35 PM IUPAP Early Career Scientist Prize 2026 in Particles and Fields

Speaker: Dr Barbara Maria Latacz (CERN)

2026-08-05-ICHEP_Latacz.pdf

2026-08-05-ICHEP_Latacz.pptx

4:45 PM IUPAP Early Career Scientist Prize 2026 in Particles and Fields

Speaker: Huilin Qu (Tsung-Dao Lee Institute, Shanghai Jiao Tong University (CN))

ml_for_jets_20260805_H_Qu.pdf

4:55 PM → 5:05 PM ICHEP2026: Poster award - https://youtube.com/live/YDaAprbKUmw?feature=share

Conveners: Irina Nasteva (Federal University of Rio de Janeiro (BR)), MAURO Cosentino (Universidade Federal do ABC (BR))

Closing ICHEP 2026.pdf

ICHEP2026 Poster Awards.pdf

ICHEP2028_Thailand.pdf

5:05 PM → 5:55 PM Plenaries: Conference Summary - https://youtube.com/live/YDaAprbKUmw?feature=share

Convener: Carla Gobel Burlamaqui De Mello (Pontifical Catholic University of Rio de Janeiro (BR))

5:05 PM Summary report

Speaker: Florencia Canelli (University of Zurich (CH))

ICHEP-2026-canelli-final-2.pdf

5:55 PM → 6:05 PM ICHEP2026: Next ICHEP - https://youtube.com/live/YDaAprbKUmw?feature=share

Convener: Chayanit Asawatangtrakuldee (Chulalongkorn University (TH))

Closing ICHEP 2026.pdf

ICHEP2026 Poster Awards.pdf

ICHEP2028_Thailand.pdf

6:05 PM → 6:15 PM ICHEP2026: Closing session - https://youtube.com/live/YDaAprbKUmw?feature=share

Conveners: Prof. Ignacio De Bediaga Hickman (CBPF - Brazilian Center for Physics Research (BR)), Rogerio Rosenfeld (UNESP - Universidade Estadual Paulista (BR))

Closing ICHEP 2026.pdf

ICHEP2026 Poster Awards.pdf

ICHEP2028_Thailand.pdf