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Matthew Moulson (INFN e Laboratori Nazionali di Frascati (IT))11/09/2025, 14:00Future OpportunitiesPoster Contribution
The lead-aerogel Cherenkov detector used as the beam-hole photon veto (BHPV) has performed well in KOTO, but for high-intensity operation at KOTO II, a detector with better time resolution would be desirable to reduce losses from the interactions of beam particles in accidental coincidence. As an alternative, a compact, high-granularity small-angle calorimeter (SAC) is under study. The SAC...
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Chandler Baynham Kenworthy (University of Birmingham (GB))11/09/2025, 14:00Future OpportunitiesPoster Contribution
The first observation of the golden mode $K^+\to\pi^+\nu\bar{\nu}$ with a significance exceeding $5\sigma$ was recently achieved using data collected in 2016-2022 by the NA62 experiment at the CERN SPS. With the 2023-2024 dataset, double the sample size is expected with respect to the 2016-2022 dataset. For analysis of the latest data NA62 is exploring recent advancements in machine learning...
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Shalini Epari (University of Montreal)11/09/2025, 14:00Other FlavorPoster Contribution
Hints from the flavor sector—such as anomalies in B-meson decays and inconsistencies in CKM unitarity—offer clues about what new physics beyond the Standard Model might look like. Among the most motivated scenarios are models predicting vector-like leptons and/or leptoquarks. This poster highlights recent results from the ATLAS experiment targeting these possibilities, using data collected...
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Mei Homma11/09/2025, 14:00Future OpportunitiesPoster Contribution
The KOTO ll experiment is planned as a next-generation successor to the KOTO experiment. We have been studying a Shashlyk-type calorimeter for the KOTO ll experiment. The Shashlyk-type calorimeter consists of alternating layers of lead and plastic scintillator tiles, penetrated by wavelength-shifting (WLS) fibers. To investigate its performance, a test setup composed of 10 scintillator tiles...
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Mr Yu-Sheng Liu (National Kaohsiung Normal University)11/09/2025, 14:00Future OpportunitiesPoster Contribution
We present an application of generative AI to improve shower profile modeling in grid-style detectors, with a focus on the CsI calorimeter used in the KOTO experiment. The core idea is to employ generative models to reconstruct electromagnetic shower patterns at a resolution finer than the detector’s actual segmentation. This approach enables the generation of high-resolution profiles that...
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Francesco Clozza (INFN-LNF)11/09/2025, 14:00Hadron PhysicsPoster Contribution
Low-energy QCD, the theory within the Standard Model that describes the strong interaction, still lacks fundamental experimental input to advance its understanding. Among these contributions, kaonic atom X-ray spectroscopy stands out as a unique gateway for probing the interaction between antikaons and nucleons at threshold energy. This research has significant implications for particle and...
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Daiki Ogawa (Osaka University)11/09/2025, 14:00Future OpportunitiesPoster Contribution
We are searching for the rare decay $K_L\to\pi^0\nu\bar{\nu}$ in the J-PARC KOTO experiment,
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The High Level Trigger (HLT) in the DAQ system was developed with GPUs in 2024. The HLT is composed of two types of computers, Computing Nodes and Disk Nodes. Computing Nodes select events and compress waveforms using GPUs. Disk Nodes store the data temporarily, and the data on the Disk node is... -
Tomas Velas (Comenius University (SK))11/09/2025, 14:00Rare DecaysPoster Contribution
Motivation, prospects, and analysis status of the rare decay $K^+ \to \pi^+ \pi^- \mu^+ \nu$ at NA62 using the data collected in 2017-2018 will be presented.
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Michal Lelak (Charles University (CZ))11/09/2025, 14:00Rare DecaysPoster Contribution
Motivation, prospects, and analysis status of the rare decay $\pi^0 \to e^+ e^- e^+ e^-$ at NA62 using the data collected in 2017-2024 will be presented.
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Francesco Artibani (INFN-LNF)11/09/2025, 14:00Hadron PhysicsPoster Contribution
Kaonic atoms spectroscopy provides essential observables for investigating low-energy strong interactions in systems with strangeness. I shall present an overview of the SIDDHARTA-2 collaboration’s efforts in this field, with a particular focus on the development and first use of a novel Cadmium-Zinc-Telluride (CZT) detector system for studying intermediate-mass kaonic atoms.
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This innovative... -
Ryunosuke Imai (The University of Osaka)11/09/2025, 14:00CP, T, and CPTPoster Contribution
Time reversal symmetry has long been a subject of interest from pre-modern physics time, since it implies the reversibility of motion. In the $K^+ \to \pi^o\mu^+ \nu$ ($K_{\mu3}$) decay, the transverse muon polarization (𝑃𝑇) is defined as the polarization component perpendicular to the decay plane. A non-vanishing value of 𝑃𝑇 provides clear evidence for T-violation under the condition that...
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Jonathan Leon Schubert (Max Planck Society (DE))11/09/2025, 14:00New PhysicsPoster Contribution
The NA62 experiment at CERN is designed to measure the highly suppressed decay $K^+\to \pi^+\nu\bar\nu$. It also has the capability to collect data in a beam-dump mode. In this configuration, $400\,\mathrm{GeV}$ protons are dumped on an absorber and New Physics (NP) particles may be produced and reach a decay volume beginning $80\,\mathrm{m}$ downstream of the absorber. A total of...
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Marco Ceoletta (Universität Mainz)11/09/2025, 14:00New PhysicsPoster Contribution
Search for the $K^+\to\pi^+\pi^0X$ decay is performed at the NA62 experiment at CERN. In the decay $X$ represents an invisible new-physics particle, such as an axion-like particle (ALP) or a massless dark photon (DP). The search is complementary to the extensive work already performed by NA62 to the two-body decay $K^{+} \rightarrow \pi^{+} X$, opening possibility to Beyond Standard Model...
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Yi-Ting Su (National Taiwan University)11/09/2025, 14:00FCNC Rare DecaysPoster Contribution
We report a study of the rare decay $K_L \to \pi^0 X$, $X \to e^+ e^−$ using KOTO Run92b data collected with a dedicated four-cluster trigger. We apply selection criteria to suppress dominant backgrounds such as $K_L \to \pi^0 \pi^+ \pi^-$, and $K_L \to e^+ e^− \gamma \gamma$, and evaluate the expected signal sensitivity. The analysis framework and background estimation strategies are...
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Atakan Tugberk Akmete (Universität Mainz)11/09/2025, 14:00Semileptonic and Radiative Kaon DecaysPoster Contribution
The semileptonic decays $K^+ \to \pi^0 \ell^+ \nu(\gamma)$ provide a clean way to test the $e$-$\mu$ lepton universality and probe the first-row unitarity $|V_{ud}|^2 + |V_{us}|^2 + |V_{ub}|^2 = 1$ of the CKM matrix. This work aims to update the branching fractions of semileptonic kaon decays, along with the other main kaon decay channels, by one-track analysis using a minimum-bias...
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Xiafei Chang (EPFL - Ecole Polytechnique Federale Lausanne (CH))11/09/2025, 14:00Future OpportunitiesPoster Contribution
The $K^+\to\pi^+\nu\bar{\nu}$ decay is a golden channel in flavor physics. It’s highly suppressed in the Standard Model and sensitive to various indirect effects of new physics. The branching ratio of the K+ → pi+ nu nubar decay has been recently observed with 5 sigma significance by the NA62 experiment at the CERN SPS. To further improve the sensitivity to this channel at NA62, the...
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Emile Augustine11/09/2025, 14:00Future OpportunitiesPoster Contribution
The KOTO-II detector will require several new specialized mechanical systems and we seek presently to establish the most basic aspects of their designs. Among these are dimensions and structural features for a 20 m long vacuum system utilizing 8 cylindrical chambers as large as 4 m in diameter. A vacuum window using a 4 m diameter thin elastic membrane to isolate cylindrical sections of the...
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