-
Dr Wilke Van Der Schee (CERN)06/04/2025, 09:00
-
Piotr Gasik (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))06/04/2025, 09:00
-
06/04/2025, 10:00
-
06/04/2025, 10:00
-
Yuuka Kanakubo (RIKEN iTHEMS / Lawrence Berkeley National Laboratory)06/04/2025, 11:00
-
Diyu Shen06/04/2025, 11:35
-
06/04/2025, 12:10
-
Carlota Andres (MIT)06/04/2025, 14:00
-
Ralf Averbeck (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))06/04/2025, 14:35
-
06/04/2025, 15:10
-
Dr Volodymyr Vovchenko (University of Houston)06/04/2025, 16:00
-
06/04/2025, 16:35
-
06/04/2025, 16:55
-
Reinhard Stock (Johann-Wolfgang-Goethe Univ. (DE))07/04/2025, 10:00Oral
-
Alexander Schmah (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))07/04/2025, 11:00Oral
-
Riccardo Longo (Univ. Illinois at Urbana Champaign (US))07/04/2025, 11:30Oral
-
Jing Wang (CERN)07/04/2025, 11:55Oral
-
Hanna Zbroszczyk (Warsaw University of Technology (PL))07/04/2025, 12:20Oral
-
Thomas Boettcher (Los Alamos National Laboratory (US))07/04/2025, 14:35Oral
-
Katarzyna Grebieszkow (Warsaw University of Technology (PL))07/04/2025, 15:00Oral
-
Dr Roli Esha (Center for Frontiers in Nuclear Science, Stony Brook University)07/04/2025, 15:20Oral
-
Christof Roland (Massachusetts Inst. of Technology (US))07/04/2025, 15:40Oral
-
Sooraj Radhakrishnan (Kent State University/Lawrence Berkeley National Laboratory)07/04/2025, 16:00Oral
-
Nicola Nicassio (Universita e INFN, Bari (IT))07/04/2025, 17:00
The ALICE Collaboration has proposed a completely new apparatus, ALICE 3, for the LHC Run 5 (LoI, arXiv:2211.02491). The detector consists of a large pixel-based tracking system covering eight units of pseudorapidity, complemented by multiple systems for particle identification, including silicon time-of-flight layers, a ring-imaging Cherenkov detector, a muon identification system, and an...
Go to contribution page -
Jorge Luis Dasilva Golan (Brookhaven National Laboratory)07/04/2025, 17:00
We present new lattice results for the heavy quark diffusion coefficient in 2+1 flavor QCD in the temperature range from 163 MeV up to few GeV. Compared to previous lattice calculations with unphysical light quark masses, we consider near-physical values and a much wider temperature range. Our results for the spatial heavy diffusion coefficient near the crossover temperature are considerably...
Go to contribution page -
Arjun Srinivasan Kudinoor (Massachusetts Institute of Technology)07/04/2025, 17:00
In heavy-ion collisions, jets formed from hard-scattered partons experience an overall energy loss and have a modified internal structure compared to vacuum jets. These modifications are a result of the interactions between the energetic partons in a jet shower and the strongly coupled quark-gluon plasma (QGP). As the jet traverses the QGP, it loses momentum to the medium, which in turn...
Go to contribution page -
Tan Lu (Institute of Modern Physics, Chinese Academy of Sciences)07/04/2025, 17:00
In non-central heavy ion collisions, substantial angular momentum is generated, resulting in significant vorticity and the spin polarization of particles with finite spin along the global angular momentum. Additionally, anisotropic flow can produce local vorticities in both in-plane (z) and out-of-plane (y) directions, leading to local polarization. The RHIC Beam Energy Scan II (BES-II)...
Go to contribution page -
Dr Imanol Corredoira Fernandez (Université Paris-Saclay (FR))07/04/2025, 17:00
The LHCb detector’s forward geometry provides unprecedented access to
Go to contribution page
the very low regions of Bjorken \textit{x} inside the nucleon. With full particle ID and a fast DAQ, LHCb is able to fully reconstruct plentiful charged particles and neutral mesons, as well as relatively rare probes such as heavy quarks, providing a unique set of constraints on nucleon structure functions. This... -
Emil Gorm Nielsen (University of Copenhagen (DK))07/04/2025, 17:20
The second-order shape phase transition of the Xe isotope chain, predicted to lie around $^{128}\text{Xe}$ to $^{130}$Xe, is challenging to measure in low-energy nuclear experiments. Recently, heavy-ion collisions have demonstrated their potential as an imaging tool for nuclear structure by examining anisotropic flow and its correlations with the mean transverse momentum. Hints of a triaxial...
Go to contribution page -
Ramona Vogt (LLNL and UC Davis)07/04/2025, 17:20
A number of new four-quark states containing from one to four $c$ or $\overline c$ quarks have been observed recently. Many of these new states have been discovered at the LHC. The production of these states via intrinsic charm in the proton is investigated. The tetraquark masses obtained in this approac agree well with the measured masses [1]. These calculations can provide some insight...
Go to contribution page -
Jan Vanek (Brookhaven National Laboratory)07/04/2025, 17:20
Approximately fifty years ago, the polarization of $\Lambda$ hyperons produced in unpolarized proton-beryllium collisions was discovered, though the origin of this phenomenon remains elusive. Many studies indicate that final-state effects, particularly from hadronization, play a significant role. Recently, it has been proposed that spin correlations of $\Lambda$ hyperons could provide insight...
Go to contribution page -
Saverio Mariani (CERN)07/04/2025, 17:20
Owing to its spectrometer acceptance, unique with respect to the other LHC experiments, and to its excellent tracking and particle identification, LHCb has been developing since the LHC Run2 a complete heavy-ion programme. In parallel, by exploiting the injection of gases in the LHC accelerator beam-pipe, LHCb is now simultaneously acquiring data in collider and fixed-target mode, with two...
Go to contribution page -
Dr Jack Holguin (The University of Manchester), Jack Holguin07/04/2025, 17:20
The first measurement of the two-point energy correlator (EEC) in Pb-Pb collisions has revealed its sizeable modifications with respect to the p-p baseline. Nevertheless, challenges arise in comparing these measurements due to selection bias caused by energy loss, which leads to a shift in the Pb-Pb EEC spectrum toward smaller angles as compared to the p-p measurement. In this talk, we will...
Go to contribution page -
Bolek Wyslouch (Massachusetts Inst. of Technology (US))07/04/2025, 17:40
The intriguing phenomena emerging in high-density quantum chromodynamics (QCD) matter are being extensively studied in the LHC’s heavy ion program, and will be explored in greater depth during the high-luminosity LHC (HL-LHC) era. To meet the challenges of HL-LHC, the CMS experiment is undergoing significant Phase-2 upgrades, including the MIP Timing Detector (MTD), which provides 30 ps timing...
Go to contribution page -
Carlos Lamas (IGFAE-USC)07/04/2025, 17:40
We study the momentum broadening of a high energy quark jet in the high-density gluon medium created right after the collision of two ultrarrelativistic heavy nuclei, the Glasma. Previous Glasma studies consider the jet as a classical probe particle, for which position and momentum are simultaneously determined. In this talk, we use the light-front QCD Hamiltonian formalism to treat the jet...
Go to contribution page -
Han-Sheng Li07/04/2025, 17:40
Chiral Magnetic Effect (CME) is a phenomenon in which electric charge is separated by a strong magnetic field from local domains of chirality imbalance and parity violation in quantum chromodynamics. The CME-sensitive observable, charge-dependent azimuthal correlator $\Delta\gamma$, is contaminated by a major physics background proportional to the elliptic flow ($v_{2}$) of particles of...
Go to contribution page -
Min He (Nanjing University of Science & Technology)07/04/2025, 17:40
The recombination production of $B_c$ mesons in heavy-ion collisions at the LHC energy is facilitated by the abundant and highly thermalized charm ($c$) quarks transported in the deconfined medium created. We study the production of $B_c$ mesons via $c$ and bottom ($b$) quark recombination in a statistical fashion by placing $B_c$ in the position of a member of the family of open $b$ hadrons,...
Go to contribution page -
Iwona Grabowska-Bold (AGH University of Krakow (PL))07/04/2025, 17:40
Measurements of top-quark pairs in heavy-ion collisions are expected to provide novel probes of nuclear parton distribution functions at high Bjoerken-$x$ values, which are difficult to access experimentally using other available probes. We report the observation of top-quark pair production in proton-lead collisions at the centre-of-mass energy of 8.16 TeV in the ATLAS experiment at the LHC....
Go to contribution page -
Chuntai Wu (Universita e INFN, Padova (IT))07/04/2025, 18:00
Heavy quarks (charm and beauty) are useful probes for investigating the properties of the quark-gluon plasma (QGP) generated in ultra-relativistic heavy-ion collisions. Their participation in the collective motion of the medium can be assessed by measuring the charm-hadron elliptic-flow coefficient $v_2$, originating from the initial-state spatial asymmetry in non-central heavy-ion collisions....
Go to contribution page -
Anjali Nambrath (University of California Berkeley (US))07/04/2025, 18:00
Jet substructure is a powerful tool for testing QCD in elementary particle collisions. The two-point energy-energy correlator (EEC), defined as the energy-weighted cross section of particle pairs inside jets, is a novel jet substructure observable probing the correlation of energy flow within jets. In pp collisions, the angular dependence of the EEC cross section shows a distinct separation of...
Go to contribution page -
Harri Niemi (University of Jyväskylä)07/04/2025, 18:00
We present a novel Monte-Carlo implementation of the EKRT model, MC-EKRT, for computing partonic initial states in high-energy nuclear collisions [1]. Our new MC-EKRT event generator is based on collinearly factorized, dynamically fluctuating pQCD minijet production, supplemented with a saturation conjecture that controls the low-$p_T$ particle production. Previously, the EKRT model has been...
Go to contribution page -
Zhengqing Wang (Fudan University (CN))07/04/2025, 18:00
The interplay between the chiral anomaly and strong magnetic or vortical fields generated in off-central heavy-ion collisions is theorized to produce anomalous chiral effects in the quark–gluon plasma, such as the Chiral Magnetic Effect (CME) and the Chiral Vortical Effect (CVE). These effects have been actively studied by several experiments for over a decade as they could shed light on the...
Go to contribution page -
Giacomo Alocco (Universita e INFN, Torino (IT))07/04/2025, 18:00
A new fixed-target experiment, NA60+, is proposed at the CERN SPS to measure muon pairs in the centre-of-mass energy range from 6 to 17 GeV across various 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 vertex spectrometer and a...
Go to contribution page -
Petr Chaloupka07/04/2025, 18:20
The Compressed Baryonic Matter (CBM) experiment is under construction at the Facility for Antiproton and Ion Research (FAIR) in Darmstadt, Germany. It aims to explore the phase structure and microscopic properties of strong interaction (QCD) matter at large net-baryon densities and moderate temperatures using heavy-ion collisions in the energy range √sNN = 2.9 - 4.9 GeV.
CBM is a...
Go to contribution page -
Enrico Speranza (CERN)07/04/2025, 18:20
In recent years, there has been a growing interest in the study of spin-polarization effects in heavy-ion collisions. Most approaches assume that final-state particles become polarized only if the thermal vorticity and shear are non-zero at freeze-out. In this sense, polarization is a final-state effect. Here, we propose a different polarization mechanism. For the first time, spin density is...
Go to contribution page -
Florian Lindenbauer (TU Wien)07/04/2025, 18:20
It has recently been widely acknowledged that the initial stages are important for correctly describing jet quenching in heavy-ion collisions. In particular, the initial stages influence the emission spectrum of hard partons traversing the plasma. Such calculations require the knowledge of the momentum-broadening kernel $C$, which describes the probability of a jet parton receiving a momentum...
Go to contribution page -
Ananya Rai (Yale University (US))07/04/2025, 18:20
In heavy-ion collisions, jets propagating through the quark-gluon plasma undergo interactions with the medium. These interactions modify the internal structure of jets, making jet substructure an invaluable tool for probing the microscopic properties of the QGP. N-point Energy Correlators, defined as energy-weighted N-particle correlations inside jets, have emerged as a novel substructure...
Go to contribution page -
Luigi Dello Stritto (CERN)07/04/2025, 18:20
Recent observations at the Large Hadron Collider (LHC) have revealed a significant enhancement in baryon production in hadronic collisions compared to e$^+$e$^-$ and ep collisions, challenging the long-held assumption of fragmentation universality. This phenomenon, initially observed in the charm sector, has also been observed in the beauty sector, indicating a broader implication for...
Go to contribution page -
Tommaso Isidori (The University of Kansas (US))07/04/2025, 18:40
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.
Go to contribution page
The FoCal consists of a compact... -
Cong Yi07/04/2025, 18:40
We investigate the hydrodynamic helicity polarization of $\Lambda$ hyperons and the spin alignment of $\phi$ mesons at RHIC-BES energies by utilizing the relativistic (3+1)D CLVisc hydrodynamics framework with SMASH and AMPT initial conditions.
Go to contribution page
As opposed to local spin polarization at high energy collisions, our hydrodynamic simulations demonstrate that the helicity polarization induced by... -
Dominik Karol Derendarz (Polish Academy of Sciences (PL))07/04/2025, 18:40
High-energy partons are known to lose energy when passing through the hot and dense medium produced in heavy-ion collisions. This energy loss depends on the mass, flavor of the fragmenting parton and on the structure of the partonic shower, providing valuable insights into the properties of the QCD medium. This talk presents new results from the ATLAS Collaboration, exploring the flavor...
Go to contribution page -
Fabrizio Chinu (Universita e INFN Torino (IT))07/04/2025, 18:40
Due to their large mass, beauty quarks are always produced in hard-scattering processes, and hence their production can be computed with perturbative quantum chromodynamics (pQCD) calculations. The production cross section of beauty hadrons can be theoretically described with the factorisation approach as a convolution of the parton distribution functions of the incoming projectiles, the...
Go to contribution page -
Kayran Schmidt07/04/2025, 18:40
I will discuss the (3+1)D structure of the Glasma [1] in the dilute approximation, a semi-analytic framework for the computation of rapidity-dependent early-time observables in relativistic heavy-ion collisions. Based on the Color Glass Condensate effective field theory, where the gluonic interactions between the large Bjorken-x, static sources localized in the colliding nuclei are described...
Go to contribution page -
Mattia Faggin (CERN)07/04/2025, 19:00
Heavy quarks (charm and beauty) are mainly produced in hard-scattering processes among partons in ultrarelativistic hadronic collisions at the LHC. In heavy-ion collisions, where a quark-gluon plasma (QGP) state is produced, charm and beauty quarks are produced on a timescale shorter than the medium formation time, being sensitive to the initial angular momentum of the fireball and to the...
Go to contribution page -
Andrea PALERMO (Institut Denis Poisson, CNRS), Andrea Palermo (Stony Brook University)07/04/2025, 19:00
The $\Lambda$ polarization is a crucial probe of the gradients of velocity and temperature in the quark-gluon plasma generated in heavy-ion collisions. However, it is still not systematically used to tune hydrodynamic models. In this talk, we investigate the influence of different initial conditions and parametrization of the bulk viscosity on $\Lambda$ polarization, showing that they affect...
Go to contribution page -
Dr Heikki Mäntysaari (University of Jyväskylä)07/04/2025, 19:00
We include the perturbative JIMWLK energy evolution into the IP-Glasma initial state description used to simulate the early-time dynamics in heavy ion collisions. By numerically solving the JIMWLK equation on an event-by-event basis, we obtain the energy (Bjorken-$x$) dependent structure of the colliding nuclei. This enables us to predict how the initial state evolves when moving from RHIC to...
Go to contribution page -
Soumya Mohapatra (Columbia University (US))07/04/2025, 19:00
In heavy-ion collisions, hard-scattered partons lose energy as they traverse the medium, which is simultaneously modified by this interaction. One expected medium modification, known as the "diffusion wake," is a particle enhancement in the direction of the parton and a depletion in the opposite direction. Although theoretically predicted, clear experimental evidence of the diffusion wake...
Go to contribution page -
Matthew Caleb Hoppesch (University of Illinois at Urbana-Champaign)07/04/2025, 19:00
A subset of heavy-ion collisions are ultra-peripheral collisions (UPC), where the ions collide with a large impact parameter, causing them to interact primarily through their intense electromagnetic fields. These interactions allow for the study of various photon-induced processes at high energies. The products of exclusive UPC interactions are typically characterized by very low transverse...
Go to contribution page -
Dr Jiaxing Zhao (Subatech)08/04/2025, 08:40
A heavy quark-antiquark ($Q\bar Q$) pair can be produced in several pQCD processes, which impose different correlations between the $Q$ and $\bar Q$. Employing the recently advanced EPOS4HQ event generator, which contains these processes, we show that they explain the measured $D$$\bar D$ and $DD$ correlations and how they influence the $p_T$ distributions of open heavy flavor mesons in...
Go to contribution page -
Md. Nasim (University of California, Los Angeles)08/04/2025, 08:40
It is known from earlier studies that the hadronic interaction affects the measured yield of short lived resonance e.g. $K^{*0}$. Recent studies [1] show that the directed flow ($v_{1}$) of $K^{*0}$ is strongly affected during the hadronic stage due to asymmetric loss in different sides of the $p_{x}$ axis in momentum space caused by the tilted fireball and density dependent rescattering....
Go to contribution page -
Sigurd Nese (University of Oslo (NO))08/04/2025, 08:40
In an ultra-peripheral collision, where the impact parameter is larger than the sum of the nuclear radii, the nuclei mainly interact electromagnetically. These reactions are mediated by virtual photons. A photon can interact with a gluon in the target nucleus and produce a pair of charm quarks. These charm quarks then fragment and are observed as open charm hadrons ($\rm D^{0}$, $\rm D^{∗}...
Go to contribution page -
Ankita Nain08/04/2025, 08:40
The chiral magnetic wave (CMW) in heavy-ion collisions probes the topological sector of quantum chromodynamics, where parity and charge-parity symmetries are locally violated. Unlike the Chiral Magnetic Effect (CME), where the induced dipole moment fluctuates randomly from event to event, the CMW generates an electric quadrupole moment with a same sign for a given net charge state of the...
Go to contribution page -
Virginia Bailey (Georgia State University)08/04/2025, 08:40
The sPHENIX experiment is a next-generation collider detector at RHIC designed for rare jet and heavy flavor probes of the Quark-Gluon Plasma. The experiment includes large-acceptance, hermetic electromagnetic (EMCal) and hadronic (HCal) calorimeter systems, along with a very high-rate data acquisition plus trigger system. In RHIC Run-24, sPHENIX sampled 107/pb of p+p collision data at 200 GeV...
Go to contribution page -
Dr Xin-Nian Wang (Lawrence Berkeley National Lab. (US))08/04/2025, 09:00
The diffusion wake accompanying the jet-induced Mach cone provides a unique probe of the properties of quark-gluon plasma in high-energy heavy-ion collisions. It can be characterized by a depletion of soft hadrons in the opposite direction of the propagating jet. We explore the 3D structure of the diffusion wake induced by γ-triggered jets in Pb+Pb collisions at the LHC energy within the...
Go to contribution page -
Steffen Bass (Duke University)08/04/2025, 09:00
Heavy quarks serve as a clean probe of the quark-gluon plasma (QGP) produced in high-energy nuclear collisions. They are primarily generated from early-stage hard scatterings and retain information about the entire evolution of the QGP fireball. We have developed a state-of-the-art model to provide a comprehensive description of the heavy quark evolution in a realistic QGP medium from the...
Go to contribution page -
Vendulka Filova (Czech Technical University in Prague (CZ))08/04/2025, 09:00
According to quantum chromodynamics, at high energy, hadrons exhibit a dynamic equilibrium between gluon splitting and recombination, known as saturation. Diffractive photonuclear production of J/ψ vector mesons provides unique insights into the gluon distribution of hadrons. The Mandelstam-t variable, representing the momentum transfer, probes hadron structure within the impact-parameter...
Go to contribution page -
Prof. Qun Wang (University of Science and Technology of China)08/04/2025, 09:00
The observation of the vector meson's global spin alignment by the STAR Collaboration reveals that strong spin correlations may exist for quarks and antiquarks in relativistic heavy-ion collisions in the normal direction of the reaction plane. We propose a systematic method to describe such correlations in the quark matter. The correlations can be classified as local and long range types. We...
Go to contribution page -
Tomasz Bold (AGH University of Krakow (PL))08/04/2025, 09:00
This talk presents recent ATLAS measurements investigating correlations between the 'ridge' - azimuthal correlations between particles in the underlying event that extend over all rapidities - and hard scattering processes in $pp$ and $p$+Pb collisions. To study this soft-hard correlation, measurements of two-particle correlations in with two different particle-pair selections are studied. In...
Go to contribution page -
Daniel Pablos (IGFAE, USC)08/04/2025, 09:20
In the last years, it has become clearer that recoiling particles originated due to elastic scatterings between the energetic partons within a jet and the medium constituents within the QGP are of great importance for jet quenching phenomenology. Current implementations in state-of-the-art models consider that the elastic scattering process takes place between an on-shell energetic parton and...
Go to contribution page -
Michael Joseph Peters (Massachusetts Inst. of Technology (US))08/04/2025, 09:20
The first measurement of two-particle angular correlations for charged particles with LEP-II data is presented. The study is performed using archived hadronic $e^+e^-$ data collected by ALEPH at center-of-mass energies up to 209 GeV, above the $WW$ production threshold, which provide access to unprecedented charged-particle multiplicities and more complex color-string configurations if...
Go to contribution page -
Mateusz Dyndal (AGH University of Krakow)08/04/2025, 09:20
The fully stripped ions used in heavy ion collisions at the LHC are an excellent source of high-energy quasi-real photons. These can interact with photons emitted by the oncoming nucleus, or with the nucleus itself, either directly in inelastic processes or diffractively via pomeron exchange. Diffractive photonuclear processes can produce exclusive vector mesons that are uniquely sensitive...
Go to contribution page -
Patrycja Anna Potepa (AGH University of Krakow (PL))08/04/2025, 09:20
In relativistic heavy-ion collisions, top quarks are expected to be attractive candidates for probing the quark-gluon plasma as well as to bring unique information about the time evolution of strongly interacting matter. We report the first study of top-quark pair production in lead-lead collisions at the centre-of-mass energy of 5.02 TeV with the ATLAS experiment at the LHC. The dataset was...
Go to contribution page -
David Dobrigkeit Chinellato (Austrian Academy of Sciences (AT))08/04/2025, 09:20
The appearance of vortical structures originating from gradients is a ubiquitous signature of collective fluid dynamic motion. We present event-by-event simulations for central asymmetric light+heavy and Au+Au collisions to investigate the formation and evolution of vortex-ring structures in the longitudinal flow velocity profile [1]. The production-plane polarization of $\Lambda$ hyperons,...
Go to contribution page -
Arpith Kumar (Central China Normal University)08/04/2025, 09:40
Although strong magnetic fields are expected in off-central heavy ion collisions, directly measuring their imprints, such as chiral magnetic effects, remains challenging. In this talk, we propose baryon electric charge correlation, $\chi^{\rm BQ}_{11}$, as well as the chemical potential ratio, $\mu_{\rm Q}/\mu_{\rm B}$, as useful probes for the detection of magnetic fields in heavy ion...
Go to contribution page -
Benjamin Jacob Gilbert (Lawrence Livermore Nat. Laboratory (US))08/04/2025, 09:40
In ultra-relativistic heavy ion collisions, the charged ions produce an intense flux of equivalent photons. Photon-induced processes are the dominant interaction mechanism when the colliding nuclei have an impact parameter larger than the nuclear diameter. In these ultra-peripheral collisions (UPCs), the photon provides a clean, energetic probe of the partonic structure of the nucleus,...
Go to contribution page -
Nima Zardoshti (CERN)08/04/2025, 09:40
The flavour dependence of parton showers presents a unique opportunity to explore fundamental properties of QCD interactions. In particular, the substructure of low-energy jets containing heavy-flavour hadrons provides experimental access to both mass effects as well as the impact of Casimir colour factors. Using novel tracing methods, splittings of charm quarks are isolated to measure...
Go to contribution page -
Shreyasi Acharya (Universita e INFN, Bari (IT))08/04/2025, 09:40
Quarkonium production in high-energy hadronic collisions is sensitive to both perturbative and non-perturbative aspects of quantum chromodynamics (QCD) calculations. Charmonium cross section can be split into prompt and non-prompt components, the first corresponding to directly produced charm-anticharm pairs, the second originating from the decay of beauty hadrons. Both components are...
Go to contribution page -
Lorenzo Gavassino08/04/2025, 09:40
It was recently discovered that Israel-Stewart theory is not as causal as we thought [1]. When a fluid expands too fast, as in heavy ion simulations at early times, the large viscous stresses modify the propagation speeds, leading to superluminal signaling [2]. Since we would not trust hydrodynamic information speeds anyway, this may not sound like such disconcerting news, were it not for some...
Go to contribution page -
Matteo Buzzegoli (West University of Timisoara)08/04/2025, 10:00
The observation of global and local spin polarization in heavy-ion collisions is explained as being induced by thermodynamics gradients of the QGP at local thermal equilibrium, such as the thermal vorticity and the thermal shear. However, since not all the features of the measurements can be well reproduced by the models, the assumption that the spin degrees of freedom of the QGP are...
Go to contribution page -
Ms Isabella Danhoni08/04/2025, 10:00
We present calculations of the shear viscosity in two limits using perturbative QCD and an excluded-volume hadron resonance gas at finite BSQ densities. We then develop a framework that interpolates these two limits to calculate shear viscosity across a wide range of finite BSQ densities. The pQCD and hadron resonance gas calculations have different BSQ densities dependence, leading to a...
Go to contribution page -
Preeti Dhankher (University of California Berkeley (US))08/04/2025, 10:00
Jet substructure provides precise tests of Quantum Chromodynamics (QCD) and offers more differential ways to study hadronization mechanisms, compared to measurements of single hadrons. QCD predicts that jet radiation patterns depend on the mass and color charge of the initiating parton. Parton showers, in particular, are sensitive to the different Casimir factors of quarks and gluons, as well...
Go to contribution page -
Antoni Szczurek08/04/2025, 10:00
The ultraperipheral collisions are a source of various interesting phenomena based on photon-induced reactions. We calculate cross sections for single and any number of n, p, $\alpha$, $\gamma$ in ultraperipheral heavy-ion collision for LHC energies emitted in forward/backward directions. We analyze the production of a given number of neutrons relevant for a recent ALICE experiment [1] using...
Go to contribution page -
Himanshu Sharma (Universita e INFN, Padova (IT))08/04/2025, 10:00
Charm-baryon production measurements in proton-proton (pp) collisions at the LHC are fundamental to investigate the charm-quark hadronization, and to test perturbative QCD-based calculations. Recent measurements in pp collisions show baryon-to-meson ratios significantly higher than those in $\mathrm{e^+e^-}$ collisions, challenging the validity of theoretical calculations based on the...
Go to contribution page -
146. Covariant formulation of spinodal decomposition for simulating first-order QCD phase transitionMayank Singh (Vanderbilt University)08/04/2025, 10:50
We expect to probe the QCD phase diagram in the region beyond the critical point at the beam energy scan program at Relativistic Heavy-Ion Collider (RHIC) and at the upcoming Facility for Antiproton and Ion Research (FAIR). In this region, the heavy-ion collision systems will undergo a first-order phase transition. This phase transition is expected to proceed via spinodal decomposition as the...
Go to contribution page -
Benedict Heybeck (Goethe University Frankfurt (DE))08/04/2025, 10:50
Experimental information on the strong interaction between $\Sigma$ hyperons and protons is a crucial input for both the description of the equation of state of neutron stars with hyperon content and theoretical predictions regarding potential $\Sigma$-hypernuclei. Data on this interaction are scarce, solely based on scattering experiments. Since data points are only available at rather high...
Go to contribution page -
Chi Zhang (Université Paris-Saclay (FR))08/04/2025, 10:50
Quarkonium production has long been identified as one of the golden probes to study the quark-gluon plasma (QGP). Among many observables, the measurement of azimuthal anisotropies in quarkonium production has a special role to shed light on the collective behavior of particles in a strongly interacting medium. In particular, the magnitude of the $\rm{J}/\psi$ elliptic flow measured at the LHC...
Go to contribution page -
Sijie Zhang08/04/2025, 10:50
Jet quenching — modifications to the energy and substructure of high-energy parton showers in the Quark Gluon Plasma (QGP) — serves as a key experimental tool to probe properties of QGP in relativistic heavy-ion collisions. On one hand, the quenching effect, often quantified through the nuclear modification factor (e.g., $R_{AA}$), is well established in large collision systems, such as Au+Au...
Go to contribution page -
Eamonn Weitz (Universität Bielefeld)08/04/2025, 10:50
In heavy-ion collisions, the transverse momentum broadening coefficient, $\hat{q}$ plays an integral role in characterising how a high-energy parton loses energy to the quark-gluon plasma (QGP) through which it passes. Over the last few years, it has been shown [1,2] that $\hat{q}$ starts to receive radiative corrections at $\mathcal{O}(g^2)$, featuring potentially large logarithms. Indeed,...
Go to contribution page -
Jing-an Sun (Fudan University)08/04/2025, 11:10
The multistage approach based on hydrodynamics has achieved remarkably success in modeling heavy-ion physics, providing an accurate description of experimental particle spectra as well as various signatures of collective flow, flow correlations, and fluctuations. However, traditional numerical simulations of hydrodynamics are challenged by recent high-precision measurements: to probe the finer...
Go to contribution page -
Zhiyong Lu (China Institute of Atomic Energy (CN))08/04/2025, 11:10
Characterizing the quark--gluon plasma (QGP) created in ultrarelativistic heavy-ion collisions requires identifying observables sensitive to different stages of the collision. Recent studies show that measuring collective anisotropic flow and the complex interplay between its Fourier harmonics ($v_n$) and $(\Psi_n$) can effectively disentangle contributions from various collision phases,...
Go to contribution page -
Gabe Dale-Gau (University of Illinois at Chicago)08/04/2025, 11:10
Measurements at RHIC and the LHC show strongly enhanced baryon-to-meson yield ratios at intermediate transverse momenta ($p_{\rm{T}}$) in inclusive measurements from high-energy nuclear collisions compared to $p$+$p$ baseline. This enhancement is attributed to strong hydrodynamic flow and parton recombination in the Quark-Gluon Plasma (QGP).
Go to contribution page
Jet probes have been used extensively to gain... -
Kehao Zhang08/04/2025, 11:10
Dibaryons, exotic states composed of six quarks, have long been a subject of interest in understanding the strong interaction beyond conventional hadrons. Among these, strange dibaryons, which contain strange quarks, offer an important role of studying the hyperon-nucleon ($YN$) and hyperon-hyperon ($YY$) interactions . Of particular interest are the spin-0 $H$ ($S$ = -2) and the spin-2...
Go to contribution page -
Thomas Schaefer08/04/2025, 11:10
We describe numerical simulations of stochastic fluid dynamics
Go to contribution page
with a conserved charge coupled to the momentum density of the
fluid. This theory is known as model H, and it is expected to
describe universal dynamics in the vicinity of a possible
critical endpoint in the QCD phase diagram. We verify dynamical
scaling, and compute the scaling exponent and the renormalized
viscosity. We... -
Prof. Kai Zhou (CUHK-Shenzhen)08/04/2025, 11:30
In recent years, machine learning has emerged as a powerful computational tool and novel problem-solving perspective for physics, offering new avenues for studying strongly interacting QCD matter properties under extreme conditions. In this talk I will aim to provide an overview of the current state of this intersection of fields, focusing on the application of machine learning to theoretical...
Go to contribution page -
Lucia Oliva (Università di Catania, INFN Catania)08/04/2025, 11:30
The unexpected pattern of global spin alignment of vector mesons observed in relativistic heavy-ion collisions for different particle species have posed a strong challenge to theoretical interpretation, as it cannot be explained solely through conventional polarization sources such as vorticity and electromagnetic fields. We argue that fluctuations of strong-force fields with short correlation...
Go to contribution page -
Dr Debojit Sarkar (Niels Bohr Institute, University of Copenhagen, Denmark)08/04/2025, 11:30
The observation of collective-like behaviors in pp and p–Pb collisions at LHC energies has sparked debate about the similarities between the dynamics of small systems and heavy-ion collisions. In this talk, our latest published results are presented, showing baryon-meson $v_{\rm 2}$ grouping (within 1$\sigma$) and significant splitting (approximately 5$\sigma$) at intermediate $p_{\rm T}$ in...
Go to contribution page -
Maja Mackowiak-Pawlowska (Warsaw University of Technology (PL))08/04/2025, 11:30
The NA61/SHINE strong interaction program is dedicated to exploring the phase diagram of strongly interacting matter. Its primary goals are to study the onset of deconfinement and to search for the critical point within this type of matter. To accomplish these objectives, the program conducts scans over a range of beam momenta (from 13A to 150A/158A GeV/c) and system sizes, involving...
Go to contribution page -
Sierra Cantway (Yale University (US))08/04/2025, 11:30
Measurements of jet substructure observables in heavy-ion collisions provide powerful constraints on the microscopic mechanisms of interactions between energetic partons and the QGP. Though there has been remarkable progress in measuring inclusive charged-particle jet substructure observables, a complete understanding of the identified particle production inside jets (jet hadrochemistry) and...
Go to contribution page -
Prof. Matthew William Luzum (University of São Paulo)08/04/2025, 11:50
The evolution of a relativistic heavy-ion collision is typically understood as a process that transmutes the initial geometry of the system into the final momentum distribution of observed hadrons, which can be described via a cumulant expansion of the initial distribution of energy density and is represented at leading order as the well-known eccentricity scaling of anisotropic flow. We...
Go to contribution page -
Volodymyr Kuznietsov08/04/2025, 11:50
We calculate non-Gaussian cumulants of particle number near the 3D-Ising critical point by means of GPU-accelerated molecular dynamics simulations. We perform ensemble averaging with large statistics, and study the equilibration of cumulants near the critical point. We find that scaled variance, skewness, and kurtosis reflect the expected critical behavior of fluctuations and equilibrate on...
Go to contribution page -
Dr Chathuranga Sirimanna (Duke University), Yu Fu (Duke university)08/04/2025, 11:50
We compute medium corrections to the energy-energy correlator (EEC) for jets in electron-nucleus collisions at leading order in the QCD coupling and the interaction of the jet with the medium. We derive an analytical expression for the modification of the EEC as a function of the opening angle and show that the modification is strongest at large angles within the jet cone. We obtain explicit...
Go to contribution page -
Mr Ian Cordeiro (University of Illinois at Urbana Champaign)08/04/2025, 11:50
We present the first set of fully-nonlinear, necessary and sufficient conditions guaranteeing causal evolution of the initial data for the Israel-Stewart equations with shear and bulk viscosity from kinetic theory coupled to a nonzero baryon current. These nonlinear constraints not only provide causality: they also (a) guarantee the existence of a locally well-posed evolution of the initial...
Go to contribution page -
Omar Vazquez Rueda (University of Houston (US))08/04/2025, 11:50
Relativistic heavy-ion collisions create a hot, dense state of QCD matter called Quark–Gluon Plasma (QGP). In ultra-central collisions, the QGP volume saturates and remains constant; instead, entropy fluctuations cause temperature variations in the system. This property can be probed by measuring the correlation between the average transverse momentum (⟨$p_{\rm T}$⟩) and the multiplicity of...
Go to contribution page -
Ashutosh Dash08/04/2025, 12:10
We present BHAC-QGP, an advanced numerical code designed to simulate the evolution of quark-gluon plasma (QGP) in heavy-ion collisions with enhanced accuracy in the presence of magnetic field. Building on the foundation of the Black Hole Accretion Code (BHAC), which solves general-relativistic magnetohydrodynamic (GRMHD) equations for astrophysical phenomena, BHAC-QGP adapts these capabilities...
Go to contribution page -
Chathuranga Sirimanna08/04/2025, 12:10
We present a comprehensive study of jet substructure modifications in heavy-ion collisions using the JETSCAPE framework. Our approach utilizes the multi-stage jet energy loss description, which includes suppression of jet-medium interaction at high virtuality, reflecting the virtuality dependence of the process. The parameters used in our simulations are tuned to reproduce hadron RAA and...
Go to contribution page -
Mr Tribhuban Parida (IISER Berhampur)08/04/2025, 12:10
Event-by-event fluctuations of the transverse momentum per particle $[p_T]$ have been measured in heavy-ion collisions at RHIC and LHC, but this topic has so far received less attention than anisotropic flow. Yet the physical mechanism is identical for both phenomena: A long-range correlation in the initial stages, followed by collective expansion. While the origin of anisotropic flow is a...
Go to contribution page -
Ilya Fokin (Heidelberg University (DE))08/04/2025, 12:10
Lattice QCD calculations predict that chiral symmetry is restored in a smooth crossover transition between a quark--gluon plasma and a hadron resonance gas (HRG) at vanishing net-baryon density, a condition realized in heavy-ion collisions at the LHC. In this regime, the net-baryon number cumulants computed using the HRG and lattice QCD partition functions are in good agreement up to third...
Go to contribution page -
David Wagner (Florence University)08/04/2025, 12:10
In the past years, different observables related to the spin polarization of hadrons such as $\Lambda$-Baryons have attracted much attention and continue to find new applications.
Go to contribution page
While some measurements (such as the global polarization) are straightforwardly reproduced by assuming the spins of the particles to be in equilibrium, the explanation of more differential observables (such as the... -
Somadutta Bhatta (Stony Brook University (US))08/04/2025, 16:10
Radial flow and anisotropic flow are key observables used to study the expansion dynamics of the quark-gluon plasma (QGP). While anisotropic flow has been extensively explored, the collective nature of radial flow has remained less understood. This talk presents the first measurement of transverse momentum ($p_{\mathrm{T}}$) dependence of radial flow fluctuations, $v_0(p_{\mathrm{T}})$, over...
Go to contribution page -
Hongcan Li08/04/2025, 16:10
Hadrons have been suggested as sensitive probes for the medium properties of nuclear matter created in heavy-ion collisions. A dense baryon-rich medium is formed during collisions at center-of-mass energies of a few-GeV. Since (anti-)strange hadrons and anti-protons are produced near or below the threshold, their phase space distribution and yield ratios may provide strong constraints on the...
Go to contribution page -
Dr Aleksas Mazeliauskas (Heidelberg University (DE))08/04/2025, 16:10
Hydrodynamic attractors are a universal phenomenon of strongly interacting systems that describe the hydrodynamic-like evolution far from local equilibrium. The rapid hydrodynamization of the Quark-Gluon Plasma is behind the remarkable success of hydrodynamic models of high-energy nuclear collisions. Until now, hydrodynamic attractors have been studied only in monotonically expanding systems,...
Go to contribution page -
Christian Ecker (Goethe)08/04/2025, 16:10
Multimessenger signals from binary neutron star (BNS) mergers are promising tools to infer the largely unknown properties of nuclear matter at densities that are presently inaccessible to laboratory experiments.
Go to contribution page
The gravitational waves (GWs) emitted by BNS merger remnants, in particular, have the potential of setting tight constraints on the neutron-star equation of state (EOS).
In this talk... -
Austin Alan Baty (University of Illinois Chicago)08/04/2025, 16:10
Measurements of dijet production in heavy ion collisions can be used to probe the nuclear matter. In proton-lead collisions, the normalized average dijet pseudorapidity distributions can be used as a sensitive tool for constraining the nuclear modifications of parton distribution functions (nPDF) at different $Q^2$ scales and Bjorken-$x$. In such studies, it is possible to investigate, with a...
Go to contribution page -
Ludovica Pirelli (Bergische Universität Wuppertal)08/04/2025, 16:30
Finite density lattice QCD usually relies on extrapolations in baryon
Go to contribution page
chemical potential ($\mu_B$), be it Taylor expansion, T' expansion or
analytical continuation. However, their range of validity is difficult to
control. In the canonical formulation, the baryon density is the
parameter of the system, not $\mu_B$.
Here we demonstrate that we can access finite density QCD in the... -
Aryaa Dattamunsi (Indian Institute of Technology Madras (IN))08/04/2025, 16:30
Xenon (Xe) nuclei are deformed and have a non-zero quadrupole moment, whereas lead (Pb) nuclei are considered spherical in shape. The study of Xe-Xe collisions at a center-of-mass energy per nucleon pair of $\sqrt{s_{_{\mathrm{NN}}}} = 5.44$ TeV opens up a window to study nuclear deformation at LHC. When compared to Pb-Pb collisions at $\sqrt{s_{_{\mathrm{NN}}}} = 5.36$ TeV, one can explore...
Go to contribution page -
Risto Paatelainen08/04/2025, 16:30
Completing the perturbative four-loop pressure of cold quark matter (QM) has been shown to significantly constrain the neutron-star-matter equation of state. Building on the milestone results in [1, 2], where all screened gluonic contributions to the QM pressure at this order were computed, the remaining challenge lies in evaluating the missing hard contributions arising from four-loop QCD...
Go to contribution page -
Laura Šerkšnytė (CERN)08/04/2025, 16:30
The interactions between Λ hyperons and nucleons are of crucial importance for understanding the composition of the inner core of neutron stars. The equation of state for these dense objects requires accurate knowledge of two- and three-body interactions at short distances, which remain poorly constrained by existing experimental data. ALICE has introduced a novel approach for probing these...
Go to contribution page -
Dr Simon Spies (Johann-Wolfgang-Goethe Univ. (DE))08/04/2025, 16:30
In this report, we present measurements of $^3_\Lambda H$ and $^4_\Lambda H$ in Ag+Ag collisions at $\sqrt{s_{NN}}$ = 2.55 GeV, conducted with the HADES experiment at GSI. While at RHIC and LHC energies hypernuclei production is typically discussed with a focus on two scenarios, statistical production in full equilibrium versus production via coalescence, at SIS energies, the spatial region of...
Go to contribution page -
Nicki Mullins08/04/2025, 16:50
Thermal fluctuations are a fundamental feature of dissipative systems that are essential for understanding physics near the expected critical point of QCD and in small systems. Such fluctuations can be modeled by including a stochastic source in the standard hydrodynamics equations. However, when this is done naively strange features can appear such as negative self-correlation functions...
Go to contribution page -
Andrea Sofia Triolo (University of Messina (IT), INFN Catania (IT))08/04/2025, 16:50
Understanding strangeness enhancement in proton-proton (pp) collisions at the LHC remains a challenge for hadronization models. Recent observations of the $\Omega_\mathrm{c}^0$ baryon indicate that a substantial fraction of the detected Ω baryons may originate from the decay of charm hadrons, e.g. from $\Omega_\mathrm{c}^0 \rightarrow \Omega^- + \pi^+$. However, the unknown absolute branching...
Go to contribution page -
Khwahish Kushwah (Universidade Federal Fluminense (UFF), Rio de Janeiro, Brazil)08/04/2025, 16:50
We generalize the relativistic magnetohydrodynamic (MHD) theory recently derived in Ref. [1] to describe the dissipative dynamics occurring in accretion disks in presence of large magnetic fields. For this purpose we consider a relativistic dilute gas composed of electrons and ions described by the Boltzmann-Vlasov equation and simplify it using the 14-moment approximation. This procedure...
Go to contribution page -
Chunjian Zhang (Fudan University)08/04/2025, 16:50
The shape and orientation of colliding nuclei play a crucial role in determining the initial conditions of the QGP formed in central collisions, which influence key observables such as anisotropic and radial flow. For instance, central collisions of near-spherical Au nuclei create a QGP with a fixed, circular geometry, whereas prolate-shaped uranium nuclei can collide in a variety of...
Go to contribution page -
Biao Zhang (Heidelberg university(DE))08/04/2025, 16:50
Studies of strong interactions between hadrons provide a valuable opportunity to test Quantum Chromodynamics at nucleon-scale distances. The femtoscopy technique has proven to be an effective tool for studying interactions between unstable hadrons by measuring the correlation function of hadron pairs in momentum space. This approach offers insights into the interaction between two hadrons,...
Go to contribution page -
Dr Wilke Van Der Schee (CERN)08/04/2025, 17:10
The six-hour Xe-129 run at the LHC has produced a remarkable wealth of physics, among which several studies of its nuclear shape. Previous works indicate that the elliptic flow ratio with Pb-208 collisions determines the quadrupole deformation ($\beta_2$) of Xe, while the $\rho_2$ elliptic flow-mean $p_T$ correlator informs us about the so-called triaxiality ($\gamma$). In this work, we go one...
Go to contribution page -
Rachel Steinhorst (Massachusetts Institute of Technology)08/04/2025, 17:10
We demonstrate that astrophysical constraints on the dense-matter equation of state place an upper bound on the color-superconducting gap in dense matter above the transition from nuclear matter to quark matter. Pairing effects in the color-flavor locked (CFL) quark matter phase increase the pressure at high density, and if this effect is sufficiently large then the requirements of causality...
Go to contribution page -
Marvin Nabroth08/04/2025, 17:10
We report on the analysis of event-by-event (E-by-E) fluctuations of protons and light nuclei, in heavy-ion collisions (Au+Au at $\sqrt{s_{NN}}$ = 2.4 GeV and Ag+Ag at $\sqrt{s_{NN}}$ = 2.55 GeV) measured with the HADES (High-Acceptance Di-Electron Spectrometer) apparatus. The results of various analysis techniques, including cut-based [1], fuzzy logic [2], and machine learning [3], will be...
Go to contribution page -
Maximilian Mahlein (Technische Universitaet Muenchen (DE))08/04/2025, 17:10
One of the unresolved issues in hadron–hadron collisions is the microscopic understanding of how light (anti)(hyper)nuclei are created. Several differential measurements of (anti)(hyper)nuclei yields, momentum distributions, and fluctuations have been carried out in pp, p–A, and A–A collisions at ultra-relativistic energies. Comparisons to models based on statistical hadronization or nucleon...
Go to contribution page -
Dr Yacine Mehtar-Tani (Brookhaven National Laboratory)08/04/2025, 17:10
We develop a comprehensive analytic framework for jet quenching in QCD media, based on a medium-induced parton cascade sourced by collinear virtual splittings. We show that the energy flow out of the jet cone, driven by turbulent gluon cascades, is governed by a non-linear rate equation that resums gluon splittings at arbitrary angles and is enhanced by the medium length, L. The solution of...
Go to contribution page -
Oscar Jesús Garcia Montero08/04/2025, 17:30
Subnuclear fluctuations in the initial state of heavy-ion collisions impact not only transverse long-range correlations of small systems, but also the creation of longitudinal structures, measured in longitudinal decorrelation observables [1]. In this work, we study the emergence of long-range rapidity correlations in nuclear collisions due to the inclusion of event-by-event subnuclear...
Go to contribution page -
Swati Saha (National Institute of Science Education and Research (NISER) (IN))08/04/2025, 17:30
The observation of long-range correlations is a crucial indicator of collectivity in heavy-ion collisions and has been instrumental in establishing the formation of quark-gluon plasma (QGP) at RHIC and LHC. In this study, the first direct measurement of radial flow is presented using a new observable, $ v_{\rm 0}(p_{\rm T}) $, formulated to capture the long-range correlations in the transverse...
Go to contribution page -
Yuliia Balkova (University of Silesia (PL))08/04/2025, 17:30
Strangeness production in high-energy hadronic and nuclear collisions continues to be one of the central topics in the study of strongly interacting matter. The data collected by the NA61/SHINE experiment at the CERN SPS North Area allows for a comprehensive scan of the strangeness production across various collision energies and system sizes.
This presentation will focus on the new...
Go to contribution page -
Asanosuke Jinno08/04/2025, 17:30
We investigate the validity of the $\Lambda$ single-particle potential ($\Lambda$ potential) in dense matter that is based on chiral effective field theory (chiral EFT) that is sufficiently repulsive to solve the hyperon puzzle of neutron stars. We discuss that the model calculations with the $\Lambda$ potential are consistent with the $\Lambda$ hypernuclear spectroscopy [1] and the $\Lambda$...
Go to contribution page -
Sergio Barrera Cabodevila (Instituto Galego de Física de Altas Enerxías - Universidade de Santiago de Compostela)08/04/2025, 17:30
The effective kinetic theory of QCD provides a possible picture of various non-equilibrium processes in heavy- and light-ion collisions. While there have been substantial advances in simulating the EKT in simple systems with enhanced symmetry, eventually, event-by-event simulations will be required to test this physical picture. As of now, these simulations are prohibitively expensive due to...
Go to contribution page -
Prof. Weiyao Ke (Central China Normal University)08/04/2025, 17:50
The semi-inclusive deep inelastic scattering (SIDIS) and Drell-Yan (DY) processes are primary channels for studying the parton distributions of the proton and the nucleus, and for deducing the properties of cold nuclear matter. However, for nuclear targets, the DY and SIDIS differential cross-sections are modified by multiple interactions between the active parton and spectator nucleons, which...
Go to contribution page -
Débora Mroczek (University of Illinois at Urbana-Champaign)08/04/2025, 17:50
Intermediate to low energy heavy-ion collisions are sensitive to the finite temperature ($T$), high baryon number density ($n_B$) QCD equation of state (EoS) at a ratio between charged and total number of baryons that is fixed by the colliding species. For typical nuclei used in collisions, like gold and lead, this ratio, also known as the charge fraction ($Y^{\rm QCD}_Q$), is around 0.4. On...
Go to contribution page -
Pasi Huovinen (University of Wroclaw)08/04/2025, 17:50
We study the effect of magnetic field on particle ratios and charge fluctuations in hadron resonance gas. We argue that the big change in the pion to proton ratio is due to ill-defined description of higher-spin states, and that because of detailed balance, neutral resonances must be affected by the field too. The calculated fluctuations of conserved charges are likewise suspicious and must be...
Go to contribution page -
Yili Wang (Peking University)08/04/2025, 17:50
The study of exotic hadrons has long been a topic of great interest for the understanding of Quantum Chromodynamics (QCD). As one of the light exotic hadrons, the structure and constituent quark content of $f_0(980)$ have been debated for decades, with theories suggesting it could be a tetraquark state ($s\bar sq\bar q$) or a hadronic molecule ($K\bar K$). Recently, the CMS experiment has...
Go to contribution page -
Derek Teaney08/04/2025, 17:50
We describe a unique formulation of relativistic viscous fluid dynamics based on the density frame. The equations of motion are strictly first order in time and have no non-hydrodynamic modes. The only fields are the energy and momentum densities $T^{0\mu}$ and the only parameters are the equilibrium equation state and the shear and bulk viscosities. We compare numerical results to QCD...
Go to contribution page -
Jonathan Parra, Mr Jonathan Parra (University of Houston)08/04/2025, 18:10
The D-measure of the event-by-event net charge fluctuations was introduced over 20 years ago as a potential signal of quark-gluon plasma (QGP) in heavy-ion collisions, based on the fractional charges of quarks leading to suppression of fluctuations relative to hadron gas baseline. Measurements have been performed at RHIC and LHC, but in the absence of quantitative calculations for both...
Go to contribution page -
Yumu Yang08/04/2025, 18:10
We investigate the weak-interaction-driven bulk-viscous transport properties of npe matter in the neutrino transparent regime. This work complements our recent study that shows that the dynamics of neutron star mergers away from beta equilibrium can be precisely described by an Israel-Stewart formulation with far-from-equilibrium bulk and relaxation time transport coefficients, which are...
Go to contribution page -
Chun Shen (Wayne State University)08/04/2025, 18:10
The event-by-event shapes of colliding nuclei are imprinted on flow patterns measured in relativistic heavy-ion collisions because of the strong hydrodynamic response to collision geometry. In this work, we perform high-statistics simulations to study the impacts of nuclear structure on the ratios of anisotropic flow observables between different collision systems. We study...
Go to contribution page -
Alexander Botvina (ITP, University of Frankfurt am Main)08/04/2025, 18:10
Production of nuclei and hypernuclei in relativistic ion collisions.
A. Botvina and M. Bleicher.
Institute for Theoretical Physics, J. W. Goethe University,
D-60438 Frankfurt am Main, Germany.We investigate the formation of light nuclei and hypernuclei in the
Go to contribution page
rapidly expanding nuclear matter after relativistic nucleus-nucleus
collisions. The primary hadronization phase... -
Yunxin Ye08/04/2025, 18:10
We use a novel real-time formulation of the functional renormalization group (FRG), as a valuable tool complementary to classical-statistical simulation, for dynamical systems with reversible mode couplings to study Model H, the conjectured dynamic universality class of the QCD critical point. We emphasize the structural similarities with Model G, conjectured to be the dynamic universality...
Go to contribution page -
Korinna Zapp09/04/2025, 08:40
When a hard parton fragments in vacuum, subsequent emissions are angular ordered due to colour coherence. In contrast to this, in a dense coloured medium interactions with the background change the parton's colour and disrupt colour coherence. The phase space for the next emission is then not constrained by angular ordering leading to potentially measurable differences in the distribution of...
Go to contribution page -
Gabor David09/04/2025, 08:40
Despite decades of theoretical and experimental achievements, a coherent picture of the evolution in colliding heavy ion systems is still missing, particularly in the non-perturbative regime. Since photons are penetrating probes, the combined information of direct photon yields at low transverse momenta ($p_T$) and their azimuthally asymmetric emission (flow) provides important constraints on...
Go to contribution page -
Giulia Manca (Universita` degli studi di Cagliari and INFN, Cagliari, IT)09/04/2025, 08:40
With its precise vertex reconstruction and particle identification capabilities, the LHCb detector is ideally suited to study the production and polarization of strange particles. In addition, being the origin of hyperon polarization from unpolarized proton-proton and proton-nucleus collisions not yet fully understood, measurements in different collision systems and kinematic ranges must be...
Go to contribution page -
Dr Sabarnya Mitra (Bielefeld University)09/04/2025, 08:40
The chiral phase transition in (2+1)-flavor QCD is expected to be of second order if the breaking of axial anomaly remains sufficiently strong at the chiral phase transition temperature $T_c$ [1]. This is supported by lattice QCD calculations [2]. However, FRG model calculations suggest that the scaling window, in which universal scaling relations hold, may be small [3]. Furthermore, whether...
Go to contribution page -
Rasmus Larsen09/04/2025, 08:40
Screening of the heavy quark anti-quark potential was suggested as the cause of quarkonium melting in quark gluon plasma (QGP). Perturbative QCD calculations within potential non-relativistic QCD (pNRQCD) on the other hand do not lead to a screened potential in general and the thermal correction to the potential also has an imaginary part. We determine the complex potential in QGP using...
Go to contribution page -
Maria Lucia Sambataro (Università degli Studi di Catania)09/04/2025, 09:00
The strong interaction in the non-perturbative regime typical of the system created in Heavy-Ion collision has been studied in the past years through an effective Quasi-Particle Model ($QPM$): we present an extension to a more realistic model, named $QPMp$, incorporating momentum-dependent parton masses as entailed by QCD asymptotic free dynamics. This model naturally improves the description...
Go to contribution page -
xianwen bao09/04/2025, 09:00
In a heavy-ion collision, photons, which do not interact strongly, have the advantage of escaping unimpeded from their emission source. Consequently, photons can carry valuable information about the properties and dynamics of the hot QCD medium created in heavy-ion collisions. Particularly, the transverse momentum distribution of direct virtual photons emitted from the hot QCD medium exhibits...
Go to contribution page -
Junlee Kim (CERN)09/04/2025, 09:00
Hadronic resonances are crucial probes to understand the various phases of matter created during relativistic heavy-ion collisions. Due to their short lifetimes, the yields of these resonances can be affected by competing rescattering and regeneration mechanisms in the final hadronic phase. Rescattering can alter the momentum of the resonance decay products, limiting their reconstruction...
Go to contribution page -
André Cordeiro (LIP/IST)09/04/2025, 09:00
The spectrum of coherent gluon radiation from a quark-antiquark pair experiencing multiple scatterings within a coloured medium is central for understanding in-medium parton cascades. Despite its foundational importance, current results are limited by reliance on simplified scattering rates, such as the harmonic oscillator approximation, valid only in restricted phase-space regions. Using the...
Go to contribution page -
Volodymyr Chelnokov (Goethe Universität)09/04/2025, 09:00
Introduction of a nonzero isospin chemical potential in QCD leads to the emergence of a pion condensed phase at sufficiently large $\mu_I$, bounded by a second order transition line. At zero temperature the pion condensate appears at $\mu_I = m_\pi/2$. Recent numerical studies at physical quark masses show that the pion condensation boundary remains vertical up to the meeting point with the...
Go to contribution page -
HANWEN Feng (Central China Normal University)09/04/2025, 09:20
Fluctuations and correlations of conserved charges serve as sensitive observables for investigating QCD thermodynamics. In particular, baryon-strangeness correlations may offer insights on changing degrees of freedom carrying strangeness.
In this work, we present the measurements of baryon-strangeness correlations in Au+Au collisions from the beam energy scan program (BESI and BESII,...
Go to contribution page -
Jorge Manuel Martínez Vera (Università di Torino and Universitat de Barcelona)09/04/2025, 09:20
The open quantum system framework allows one to compute quarkonium's evolution in a medium, keeping track of the needed quantum features. However, computing this evolution is a computationally demanding task. QTRAJ is an efficient code that allows one to simulate the behavior of quarkonium in a medium in the case in which the medium sees quarkonium as a small color dipole $rT\ll 1$. While this...
Go to contribution page -
Adam Takacs (Heidelberg University)09/04/2025, 09:20
The elliptic anisotropy of energetic particles produced in heavy-ion collisions is understood as an effect of a geometrical selection bias due to energy loss. In the measured ensemble, particles oriented in the direction in which the medium is shorter are over-represented as compared to those oriented in the direction in which the medium is longer. In this work we present the first...
Go to contribution page -
yingjie zhou09/04/2025, 09:20
Hypernuclei are bound states of hyperons (Y) and nucleons (N). Measurements on their yields can help us investigate their production mechanisms. In particular, the ${}^5_{\Lambda}$He and $^{4}_{\Lambda}$H(e) are bounded substantially tighter compared to the $^{3}_{\Lambda}$H. The large radius of the $^{3}_{\Lambda}$H leads to suppression in coalescence models, but not in the thermal model...
Go to contribution page -
Niklas Schild09/04/2025, 09:20
Electromagnetic probes ($\gamma$, $\gamma*$) are an excellent probe to investigate strong-interaction matter under extreme conditions. Their penetrating nature not only enables e.g. temperature measurements unbiased by the collective expansion of the fireball, but also an insight to the microscopic structure of the matter under investigation. The HADES experiment has measured virtual photons...
Go to contribution page -
Florian Eisenhut (Goethe University Frankfurt (DE))09/04/2025, 09:40
The measurement of dielectron production is a fundamental piece of the puzzle in the understanding of the hot and dense matter produced in ultra-relativistic heavy-ion collisions. The dielectron spectrum provides information that penetrates the veil of final-state hadronic interactions and provides direct access to the early phases of the collision. However, the interpretation of the measured...
Go to contribution page -
Ms Yi Chen (Vanderbilt University (US))09/04/2025, 09:40
The production of a Z boson provides a clean handle to control the population of events to be studied. By selecting muonic decays of Z bosons, we can isolate the effect of the recoiling process without potential bias from requiring isolation, as is the case for photons. Di-hadron correlations can naturally separate effects from different angular scales and enable jet substructure measurements...
Go to contribution page -
Hitansh Shah09/04/2025, 09:40
We propose a new method to investigate the existence and location of the conjectured high-temperature critical point of strongly interacting matter via contours of constant entropy density. By approximating these lines as a power series in the baryon chemical potential $\mu_B$, one can extrapolate them from first-principle results at zero net-baryon density, and use them to locate the QCD...
Go to contribution page -
John Matthew Durham (Los Alamos National Laboratory)09/04/2025, 09:40
Open charm production is a sensitive probe of both hot and cold nuclear matter effects. Charm meson production provides strong constraints on nuclear parton distributions, while charm baryon and strange charm hadron production can be used to probe strangeness- and baryon-enhancing hot QCD effects, respectively. The LHCb detector is designed to study heavy flavor hadrons at the LHC, providing...
Go to contribution page -
Weiguang Yuan (Tsinghua University)09/04/2025, 09:40
Strangeness production has been suggested as a sensitive probe to the early dynamics of the deconfined matter created in heavy-ion collisions.
Go to contribution page
There are significant discussions in the field about the initial conditions, including the colliding energy and the size of the system, needed to generate a quark-gluon plasma (QGP). It is expected that the threshold can be revealed by the measurements... -
Camilla De Angelis (Universita e INFN, Cagliari (IT))09/04/2025, 10:00
Modifications of quarkonia production in hadronic collisions provide an important experimental observable to probe the heavy quark interaction with the nuclear medium. The excited ψ(2S) state, with a relatively low binding energy, is especially sensitive to these effects. In thiscontribution, we will present a new LHCb result on ψ(2s)/J/ψ production in PbPb collisions, along with progress on...
Go to contribution page -
Yen-Jie Lee (Massachusetts Inst. of Technology (US))09/04/2025, 10:00
The first measurement of low transverse momentum ($p_\mathrm{T}$) charged hadron pseudorapidity and azimuthal angle distributions relative to $Z$ bosons in PbPb collisions at nucleon-nucleon center-of-mass energy $\sqrt{s_\mathrm{NN}} = 5.02$ TeV is presented. This study utilizes PbPb collision data recorded in 2018 with an integrated luminosity of $1.67 \pm 0.03$ nb$^{-1}$, as well as pp...
Go to contribution page -
Renan Góes-Hirayama (Frankfurt Institute for Advanced Studies)09/04/2025, 10:00
We present a newly developed hybrid hadronic transport + hydrodynamics geared towards heavy ion collisions (HICs) at low to intermediate beam energies, and report on the resulting excitation function of dileptons. In this range of energies, covered by the STAR Beam Energy Scan program and the future CBM experiment at FAIR, it is unclear how to best decribe the medium evolution. At which beam...
Go to contribution page -
Janik Ditzel (Goethe University Frankfurt (DE))09/04/2025, 10:00
Hypernuclei are bound states of nucleons and hyperons. The measurement of the production of hypernuclei with mass number A=3 and 4 in heavy-ion collisions is a powerful tool to investigate the hyper-nucleosynthesis mechanism. In the coalescence model, the production yields are sensitive to the interplay between the spatial extension of the nucleus wavefunction and the baryon-emitting source...
Go to contribution page -
Dr Chik Him Wong09/04/2025, 10:00
The QCD cross-over line in the temperature ($T$) -- baryo-chemical potential ($\mu_B$) plane has been computed by several lattice groups by calculating the chiral order parameter and its susceptibility at finite values of $\mu_B$. In this work we focus on the deconfinement aspect of the transition between hadronic and Quark Gluon Plasma (QGP) phases. We define the deconfinement temperature as...
Go to contribution page -
Dr KaiJia Sun (Institute of Modern Physics, Fudan University, Shanghai, China)09/04/2025, 10:20
Understanding the properties of hypernuclei is crucial for constraining the nature of hyperon-nucleon ($Y\text{-}N$) interactions, which plays a key role in determining the inner structure of compact stars. The lightest (anti-)hypernuclei are the hypertriton ($^3_\Lambda\text{H}$), which consists of a pair of nucleons and a $\Lambda$ hyperon, and its anti-nucleus...
Go to contribution page -
Lida Kalipoliti (LLR, École Polytechnique (FR))09/04/2025, 10:20
A search for medium-induced jet transverse momentum broadening is performed with isolated photon-tagged jet events in pp and PbPbcollisions at n5.02 TeV. The difference between jet axes as determined via energy-weight and winner-take-all clustering schemes, also known as the decorrelation of jet axes and denoted Δj, is measured for the first time in photon-tagged jet events. This observable is...
Go to contribution page -
Yige Huang09/04/2025, 10:20
Higher-order cumulants of (net-)proton multiplicity distributions serve as sensitive observables for probing the QCD phase diagram and searching for the QCD critical point (CP). Critical point is a long range collective phenomenon, and within a larger kinematic range, the critical point signal is significantly enhanced, especially in the higher-order cumulants of net-proton multiplicity...
Go to contribution page -
Ingrid Mckibben Lofnes (University of Bergen (NO))09/04/2025, 10:20
Charmonium production has long been identified as one of the golden probes to study the quark–gluon plasma (QGP). In fact, the early production of heavy quarks ($c\bar{c}$ and $b\bar{b}$) make charmonia 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...
Go to contribution page -
Joseph Atchison (Abilene Christian University)09/04/2025, 10:20
Transport coefficients play an important role in characterizing hot and dense nuclear matter, such as that created in ultra-relativistic heavy-ion collisions (URHIC). The electric conductivity can be accessed via the electromagnetic (EM) spectral function's low-energy transport peak, which can be measured via thermal dilepton emission. Several facilities including the Schwer-Ionen Synchrotron...
Go to contribution page -
Yu-Chen (Janice) Chen (Massachusetts Institute of Technology)09/04/2025, 11:10
In this talk, we present the first measurement of $\mathrm{D}^0$ photoproduction in heavy ion ultraperipheral collisions (UPCs) using the data collected by CMS experiment during 2023 PbPb collisions at LHC. The measured production cross sections are presented as a function of the $\mathrm{D}^0$ transverse momentum (2$< p_{T} <$12 GeV/c) and rapidity (-2< y <2). Additionally, we will present...
Go to contribution page -
Zhengxi Yan09/04/2025, 11:10
The understanding of collectivity in small collision systems must address three key issues related to the initial conditions: (1) the role of nucleon and sub-nucleon fluctuations, (2) nucleon forces and emergent correlations in light ions, such as alpha clustering, and (3) the influence of longitudinal fluctuations and their impact on flow decorrelations. We present two- and four-particle...
Go to contribution page -
Joshua Leon Konig (Goethe University Frankfurt (DE))09/04/2025, 11:10
Electromagnetic probes are a unique tool for studying the space-time evolution of the hot and dense matter created in ultra-relativistic heavy-ion collisions. Photons and dielectron pairs are emitted during the entire evolution of the medium created in such collisions, providing access to direct-photon production that includes thermal radiation from the early hot stages of the collision. The...
Go to contribution page -
Zachary Sweger (University of California, Davis)09/04/2025, 11:10
Fluctuations of conserved charges in heavy-ion collisions are expected to be sensitive to a critical point in the phase diagram of QCD matter [1, 2]. Such a critical point is increasingly predicted to be located in the high baryon chemical potential ($\mu_B$) region around $\mu_B$ = 500 - 650 MeV [3–8]. In 2018, the STAR Experiment started collecting data in a fixed-target configuration in...
Go to contribution page -
Isabela Maietto Silverio (UNESP - Universidade Estadual Paulista (BR))09/04/2025, 11:10
This presentation discusses recent results on femtoscopic correlations involving $D^0$ ($\bar{D0}$) mesons and hyperon polarization in pPb collisions at $\sqrt{s_{NN}}=8.16$ TeV. The femtoscopic measurements investigate the strong interaction for pair combinations of particles, allowing to extract the scattering observables accessible through their correlation functions. The results may...
Go to contribution page -
Jose Francisco Gonzalez (University of California Davis (US))09/04/2025, 11:30
We present a selection of recent measurements of electromagnetic probes conducted by CMS to probe initial-state aspects of the heavy ion collision. The Z boson has a very short lifetime and can decay to dimuon final states that can be precisely measured. These properties make it a valuable tool for studying the initial state of heavy ion collisions. It has been proposed that the momentum of...
Go to contribution page -
Xiao Huang (Rice University (US))09/04/2025, 11:30
The study of $\rm{J}/\psi$ photoproduction in ultraperipheral collisions (UPCs) offers a powerful probe of gluon dynamics in heavy nuclei. In UPCs, photons can interact with the nucleus coherently (involving the entire nucleus) or incoherently (with individual constituents). While coherent processes provide insight into the average gluon density, incoherent photoproduction is uniquely...
Go to contribution page -
SHARANG RAV SHARMA (IISER Tirupati)09/04/2025, 11:30
Anisotropic flow characterizes the shape and direction of expansion of the medium created in heavy-ion collisions. The Fourier coefficients in the expansion of particle azimuthal distribution describe the collective response of the medium to the shape of the initial collision geometry,
Go to contribution page
and are sensitive to the equation of state (EOS). A non-monotonic slope in the first-order flow coefficient... -
Vinh Luong (Joint Institute for Nuclear Research)09/04/2025, 11:30
Measurements of identical pion femtoscopy offer insights into collision dynamics, such as collective expansion, geometry of the collision zone at freeze-out, etc. In addition to the quantum interference among the pion pairs, Coulomb interactions between the pair and the net positive charge in the emitting source affect the final measurements as well. Furthermore, due to the imbalance of...
Go to contribution page -
Dr Volodymyr Vovchenko (University of Houston)09/04/2025, 11:30
We contrast the behavior of ordinary and factorial cumulants of proton number and point out that the latter has numerous advantages over the former, in particular with regards to the critical point search in heavy-ion collisions. The new RHIC BES-II data on factorial cumulants of protons is analyzed, indicating clear deviation of two- and three-particle proton correlations from the...
Go to contribution page -
Jamie Karthein (MIT)09/04/2025, 11:50
In addition to signals for the critical point, evidence for a first order phase transition would indicate a nontrivial structure within the QCD phase diagram. Moreover, while not a direct measurement of the critical point, the presence of a first order transition would imply its existence. This motivates the need to understand signatures of this first order transition in addition to directly...
Go to contribution page -
Samuel Belin (Universidade de Santiago de Compostela (ES))09/04/2025, 11:50
Particle correlations are powerful tools for studying quantum chromodynamics in hadron collisions. In heavy-ion collisions, azimuthal angular correlations probe collective phenomena in hot, dense, nuclear media, such as QGP. In small collision systems, they could point to final-state effects or potential initial-state correlations. The LHCb experiment has the unique ability to study particle...
Go to contribution page -
Xialei Jiang (Central China Normal University)09/04/2025, 11:50
Heavy-ion collisions offer a new way to understand hyperon-nucleon ($Y$-$N$) interactions. The two-particle correlation in pair relative momentum, which reveals valuable information about the space-time evolution of the particle-emitting source and final state interactions involving hyperons, is the primary observable of interest. The measurements of correlations between light nuclei ($d$,...
Go to contribution page -
Kaiyang Wang (University of Science and Technology of China)09/04/2025, 11:50
In relativistic heavy-ion collisions, $J/\psi$ photoproduction serves as a sensitive probe for studying the gluonic structure in heavy nuclei. Differential measurements of photon-induced $J/\psi$ production provide important constraints on gluon distribution functions and sub-nucleonic shape fluctuations. The linear polarization of photons involved in these processes enables imaging of the...
Go to contribution page -
Jiaxuan Luo09/04/2025, 11:50
Thermal dielectrons, which are produced throughout the entire evolution of relativistic heavy-ion collisions and are not involved in strong interactions, are suggested as the ideal probes of the hot and dense medium. By measuring the mass spectra of thermal dielectrons, one can extract the average temperature of the medium in different stages.Since the thermal dielectron emission rate is...
Go to contribution page -
Xiang-Yu Wu (McGill University)09/04/2025, 12:10
Relativistic heavy-ion collisions at the RHIC Beam Energy Scan program and SPS energies probe the QCD phase diagram at finite baryon densities. Precise photon and dilepton measurements serve as unique tomographic probes for the properties of hot nuclear matter. In this work, we study the electromagnetic radiation from relativistic heavy-ion collisions from 7.7 to 200 GeV. The dynamical...
Go to contribution page -
Federica Capellino (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))09/04/2025, 12:10
Heavy quarks (i.e. charm and beauty) are powerful tools to characterize the quark-gluon plasma (QGP) produced in heavy-ion collisions. Although they are initially produced out of kinetic equilibrium via hard partonic scattering processes, recent measurements of the anisotropic flow of charmed hadrons pose the question regarding the possible thermalization of heavy quarks in the medium. By...
Go to contribution page -
Krista Lizbeth Smith (Pusan National University (ROK))09/04/2025, 12:10
Measurements of quarkonia production in peripheral and ultraperipheral
Go to contribution page
heavy-ion collisions are sensitive to photon-photon and photon-nucleus interactions, the partonic structure of nuclei, and to the mechanisms of vector-meson production. LHCb has studied production of the J/ψ and ψ(2s) charmonium states in peripheral and ultra-peripheral collisions using PbPb data at forward rapidity,... -
Noriyuki Sogabe (University of Illinois Chicago)09/04/2025, 12:10
We study the influence of the QCD critical point on the trajectories describing the evolution of the expanding fireball in heavy-ion collisions. We find that the lines of constant specific entropy (entropy per baryon) on the phase diagram are drawn towards a special point on the coexistence (first-order) line where the specific entropy reaches a maximum [1]. We study the interplay between this...
Go to contribution page -
Michael Lisa, Yevheniia Khyzhniak09/04/2025, 12:10
The three-dimensional structure of the initial state in heavy-ion collisions have become important topic of interest in the community, since it provides insights into the origins of anisotropic flow, the breaking of boost invariance, longitudinal de-correlation, and particle correlations observed after kinetic freeze-out. One of the important properties of the 3D initial state is the tilt of...
Go to contribution page -
Maurice Coquet (Centre National de la Recherche Scientifique (FR))09/04/2025, 12:30
We propose the angular distribution of lepton pairs produced in ultrarelativistic heavy-ion collisions as a probe of thermalization of the quark-gluon plasma. We focus on dileptons with invariant masses large enough that they are produced through quark-antiquark annihilation in the early stages of the collision. The angular distribution of the lepton in the rest frame of the pair then reflects...
Go to contribution page -
Jishnu Goswami (Bielefeld University)09/04/2025, 12:30
Non-monotonic behavior in the RHIC net proton number fluctuation data could signal the presence of a QCD critical point if they probe thermal conditions at the time of freeze-out. However, the connection between higher-order baryon number cumulants calculated in equilibrium QCD thermodynamics and higher-order net proton number cumulants may not be straightforward. Moreover, correlations...
Go to contribution page -
Dr Hendrik Roch (Wayne State University)09/04/2025, 12:30
Diffractive vector meson production is a golden channel in the search for gluon saturation. The color glass condensate (CGC) framework has been successfully applied to describe diffractive vector meson production in $e+p$ collisions at HERA. Predictions for $\gamma+Pb$ collisions realized in ultraperipheral collisions at the LHC are however overestimating the experimental data at large center...
Go to contribution page -
Li Yan (Fudan University)09/04/2025, 12:30
Short-range correlations among hadrons in relativistic heavy-ion experiments are typically regarded as non-hydrodynamic and subtracted from the data. However, the fluid nature of the quark-gluon plasma (QGP) gives rise to short-range correlations stemming from hydrodynamic fluctuations. These correlations, driven by fluctuation-dissipation relations near local equilibrium, provide key insights...
Go to contribution page -
Dr Fernando Gardim (Federal University of Alfenas)09/04/2025, 12:30
We find a remarkable universality in the experimentally observed transverse momentum spectra in ultrarelativistic nuclear collisions, obtained by removing the global scales of total particle number and mean transverse momentum. This scaling behavior breaks down at large transverse momentum and for very small systems, such as those produced in p-p collisions. We further demonstrate that this...
Go to contribution page -
Silvia Masciocchi (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))09/04/2025, 12:50Oral
-
João Martins da Silva (LIP - Lisboa / ULisboa - IST)10/04/2025, 09:00
Energy correlators inside of high energy jets provide a powerful tool to image the intrinsic and emergent angular scales of QCD. They have the potential to provide unprecedented insight on the interplay between vacuum scales inside of a jet and its medium modification. Energy correlators of jets containing a gluon splitting to heavy quarks can provide unique experimental access to two- and...
Go to contribution page -
Jana N. Guenther (University of Wuppertal)10/04/2025, 09:00
A recent suggestion for finding the QCD critical endpoint [arXiv:2410.16206]
Go to contribution page
is to investigate entropy contours on the QCD phase diagram. We generalize this
idea to other lines of constant observables, like that of strangeness
susceptibility. Such quantities can not be directly calculated in lattice QCD
because of the infamous sign problem. We present an analytical continuation of
various... -
Xiaoyu Liu (Rice University (US))10/04/2025, 09:00
Recent CMS data revealed intriguing long-range correlations within high-multiplicity jets produced in proton-proton collisions, suggesting the potential onset of collective behavior, typically associated with heavy-ion collisions, at much smaller scales. Two-particle correlations in the “jet frame” show a surprising rise in elliptic flow harmonics, v2, at large pseudorapidity separations (Δη...
Go to contribution page -
Joe Osborn (Brookhaven National Laboratory)10/04/2025, 09:00
sPHENIX is a next-generation experiment at RHIC for jet and heavy-flavor physics which was fully commissioned during 2023 and 2024. Using its novel streaming-readout-capable, precision tracking system, sPHENIX collected 100 billion unbiased p+p collisions, and a further sample of minimum-bias Au-Au collisions, in Run-24. A key measurement of the sPHENIX heavy flavor physics program is the...
Go to contribution page -
Michal Heller10/04/2025, 09:00
As an effective theory, relativistic hydrodynamics is fixed by symmetries up to a set of transport coefficients. A lot of effort has been devoted to explicit calculations of these coefficients. Here we adopt a more general approach, deploying bootstrap techniques to rule out theories that are inconsistent with microscopic causality. What remains is a universal convex geometry in the space of...
Go to contribution page -
Xoán Mayo López (Universidade de Santiago de Compostela - IGFAE)10/04/2025, 09:20
One of the most striking modifications induced by the QGP on a QCD parton shower is the breaking of angular-ordering. This was established in a series of pioneering papers almost 15 years ago by studying the radiation pattern off a QCD antenna in the presence of a medium [1,2]. These effects were captured by a single critical angle solely depending on the medium properties. Constraining the...
Go to contribution page -
Soumik Chandra (Purdue University (US))10/04/2025, 09:20
The charm quark is formed almost exclusively during the initial stages of the collision, and a significant fraction of the charm quarks fragment into the $D^{0}$ meson, the lightest open-charm hadron. We can gain insights into the interactions between the charm quark and the quark-gluon plasma (QGP) medium by studying the production and the flow of $D^{0}$ meson in heavy-ion collisions. We...
Go to contribution page -
Masoud Shokri (Goethe University, ITP)10/04/2025, 09:20
Spin hydrodynamics is the extension of standard relativistic hydrodynamics with the total angular momentum considered as an independent conserved charge, where the total angular momentum is often expressed as a surface integral of a rank-3 tensor.
Go to contribution page
This rank-3 tensor is then decomposed into orbital and spin parts, which, by using the definition of orbital angular momentum in Cartesian... -
Prof. Christian Fischer (University of Giessen, Germany)10/04/2025, 09:20
In the past year, results for the location of the critical point from different
Go to contribution page
approaches seem to converge towards previous predictions from functional QCD.
We summarise recent theoretical results of the latter approach on the
Columbia plot [1], the QCD phase diagram and the location of the critical
point at finite baryon chemical potential [3]. We highlight our efforts to... -
Rohit Kumar Singh (Indian Institute of Technology Madras (IN))10/04/2025, 09:20
Measurements at the LHC have provided evidence for collective behavior in high-multiplicity pp and pPb collisions through multiparticle correlation techniques. However, no conclusive evidence of jet quenching—characterized by the energy loss of high-$p_\mathrm{T}$ partons traversing the medium—have been observed in these smaller systems. This paradox raises an intriguing question: How can a...
Go to contribution page -
Eduardo Fraga (Universidade Federal do Rio de Janeiro)10/04/2025, 09:40
We compute the pressure, chiral condensate and strange quark number susceptibility from first principles within perturbative QCD at finite temperature and very high magnetic fields up to two-loop and physical quark masses. We also discuss cold and dense quark matter in the presence of a very strong magnetic field using perturbative QCD at finite density. The effectively negligible contribution...
Go to contribution page -
Nihar Ranjan Saha (Indian Institute of Technology Madras (IN))10/04/2025, 09:40
Charm quarks serve as a sensitive probe of the Quark Gluon Plasma providing direct insights into its formation, evolution, and properties. We present the first-ever measurement of the elliptic flow of charm baryons, specifically prompt $\Lambda_c^+$, in lead-lead (PbPb) collisions at a center-of-mass energy of 5.36 TeV, using the CMS experiment. We also present the elliptic and triangular flow...
Go to contribution page -
Alexander Adam (Bergische Universität Wuppertal)10/04/2025, 09:40
One method to estimate the position of the critical endpoint of QCD is to model the free energy as a rational function of the baryon chemical potential $\mu_B$ and determine the Lee-Yang edge singularities. Using high-statistics simulations on 4HEX improved staggered $16^3\times 8$ lattices by the Wuppertal-Budapest Collaboration we estimate the location of the closest singularity in the QCD...
Go to contribution page -
Hao-Ren Jheng (Massachusetts Inst. of Technology (US))10/04/2025, 09:40
sPHENIX is a next-generation collider detector at RHIC which was successfully commissioned in 2023 and 2024 and took physics data in p+p and Au+Au collisions. In addition to its high-p$_T$ jet and heavy flavor physics program, sPHENIX is a general purpose collider detector with excellent capabilities for exploring collective phenomena in small and large systems. This is due to its large...
Go to contribution page -
Jaebeom Park10/04/2025, 09:40
The sPHENIX experiment is a next-generation collider detector at RHIC designed for rare jet and heavy flavor probes of the Quark-Gluon Plasma. The experiment includes a large-acceptance, granular electromagnetic calorimeter (EMCal) and very high-rate data acquisition plus trigger system. In RHIC
Go to contribution page
Run-24, sPHENIX sampled 107/pb of p+p collision data at 200 GeV using an efficient high-pT photon... -
Ezra Lesser (CERN)10/04/2025, 10:00
Jets offer a unique laboratory for studying the production of heavy-flavor hadrons and quarkonia, including exotic hadron candidates.
Go to contribution page
With a full range of precision vertexing, tracking, and particle ID capabilities covering forward rapidity, the LHCb experiment is especially well suited to measurements of heavy-flavor and exotic hadron production. This talk will present recent LHCb studies... -
Andi Mankolli (Vanderbilt University (US))10/04/2025, 10:00
Over the past several years, significant progress has been made in leveraging rapidity-dependent measurements from colliders to gain insight about the early and late-time dynamics of relativistic nuclear collisions. In this study, we perform a systematic model-to-data comparison using simulations of Au-Au and $d$-Au collisions and a broad range of measurements from the PHENIX, STAR, PHOBOS,...
Go to contribution page -
Tuomas Lappi10/04/2025, 10:00
This talk reviews recent progress in next-to-leading order calculations for dilute-dense-processes in the small-x gluon saturation regime, especially for Deep Inelastic Scattering observables. A systematical formalism for such observables is provided by a combination of light cone perturbation for the dilute probe, combined with a Color Glass Condensate picture for eikonal scattering off the...
Go to contribution page -
Bjoern Schenke (Brookhaven National Lab)10/04/2025, 10:00
Charm quarks offer valuable insights into the properties and evolution of the QCD medium as they are generated in the initial moments of energetic heavy-ion collisions at Relativistic Heavy-Ion collider (RHIC) and Large Hadron Collider (LHC). In particular, they can carry signals from the pre-equilibrium stage since the very high energy density of this stage can result in significant...
Go to contribution page -
Maneesha Sushama Pradeep10/04/2025, 10:00
A key question about the QCD phase diagram is whether there is a critical point somewhere on the boundary between the hadron gas and quark-gluon plasma phases, and if so where. Heavy-ion collisions offer a unique opportunity to search for signatures of such a critical point by analyzing event-by-event fluctuations in particle multiplicities. To draw meaningful conclusions from experimental...
Go to contribution page -
Wei Li (Rice University (US))10/04/2025, 10:20
Ultrarelativistic nuclear collisions have revealed the existence of a hot, dense medium exhibiting collective flow with minimal viscous dissipation, indicative of a strongly interacting quark-gluon plasma. The CMS Collaboration previously measured the speed of sound in this medium, determining a value of approximately 0.241 at an effective temperature of 219 MeV in ultracentral 5.02 TeV PbPb...
Go to contribution page -
Andreas Kirchner10/04/2025, 10:20
Over the past two decades, research has shown that various observables measured in heavy-ion collisions can be effectively described using relativistic fluid dynamics across different collision systems and energies. However, a common challenge in these studies is the modeling of the transition from the initial state to the fluid-dynamic phase. While the collision likely involves complex,...
Go to contribution page -
Caio Brito (Universidade Federal Fluminense)10/04/2025, 10:20
Understanding the applicability of fluid-dynamical models to describe the hot and dense matter produced in the early stages of hadronic collisions is a fundamental problem in the field. In particular, it is not clear to what degree this hydrodynamization process requires proximity to a local equilibrium state. In this contribution, we study this problem in kinetic theory considering an...
Go to contribution page -
Jasmine Therese Brewer (University of Oxford (GB))10/04/2025, 10:20
Heavy ion collisions provide a unique opportunity to access the space-time ordering of parton branching processes, since parton showers interact with a spatially-extended dense medium. However, the challenges of robustly isolating the formation time of a splitting phenomenologically has prevented formation time-dependent modification effects from being accessed experimentally. We address these...
Go to contribution page -
Jussi Viinikainen (Vanderbilt University (US))10/04/2025, 10:20
Energy-energy correlators can isolate physics of different angular scales, which has attracted a lot of interest recently to study it in heavy ion environments. Any modification from proton-proton reference can reveal hints about the inner workings of the quark-gluon plasma. In this presentation, we will present the first measurement of the energy-energy correlator of jets in heavy ion...
Go to contribution page -
Dr Gian Michele Innocenti (Massachusetts Inst. of Technology (US))10/04/2025, 11:10
-
Salvatore Plumari10/04/2025, 11:35
-
Michael Winn (Université Paris-Saclay (FR))10/04/2025, 12:00
-
Xiaojun Yao (University of Washington)10/04/2025, 12:25
-
Wenqing Fan (University of Houston (US))10/04/2025, 14:20
-
Alba Soto Ontoso (Universidad de Granada (ES))10/04/2025, 14:45
-
Christopher Mc Ginn (MIT)10/04/2025, 15:10
-
Dr ismail soudi (University of Jyvaskyla)10/04/2025, 15:35
-
ZHIWAN XU, Zhiwan Xu (Los Alamos National Laboratory)10/04/2025, 16:30
-
Shi Pu10/04/2025, 17:00
-
Blair Daniel Seidlitz (Columbia University (US))10/04/2025, 17:30
-
Govert Hugo Nijs (CERN)10/04/2025, 18:00
-
Kirill Boguslavski (TU Wien (AT))11/04/2025, 09:00
-
Farid Salazar (Institute for Nuclear Theory, University of Washington)11/04/2025, 09:30
-
You Zhou (Niels Bohr Institute (DK))11/04/2025, 10:00
-
Shinichi Esumi (University of Tsukuba (JP))11/04/2025, 11:00
-
Bastian Brandt (University of Bielefeld)11/04/2025, 11:30
-
Fabian Rennecke (Justus Liebig University Giessen)11/04/2025, 12:00
-
Mesut Arslandok (Yale University (US))11/04/2025, 14:00
-
Joao Lourenco Henriques Barata11/04/2025, 14:30
-
Agnieszka Ewa Ogrodnik (Charles University (CZ))11/04/2025, 15:00
-
Yuki Fujimoto (University of California, Berkeley / RIKEN)11/04/2025, 15:30
-
Horst Sebastian Scheid (CERN)11/04/2025, 16:30
-
Greg Jackson (SUBATECH (CNRS/IN2P3))11/04/2025, 17:00
-
Valentina Mantovani Sarti (Technische Universitaet Muenchen (DE))11/04/2025, 17:30
-
Benjamin Dönigus (Johann-Wolfgang-Goethe Univ. (DE))11/04/2025, 18:00
-
Luciano Rezzolla11/04/2025, 21:15Oral
-
340. The ultimate pixel detector for tracking and vertexing in ultra-relativistic nuclear collisionsMagnus Mager (CERN)12/04/2025, 09:00
-
Hannah Bossi (Massachusetts Inst. of Technology (US))12/04/2025, 09:30
-
Jana Bielcikova (Czech Academy of Sciences (CZ))12/04/2025, 10:00
-
Hannah Elfner12/04/2025, 10:30
-
Tucker Hwang (University of California Berkeley (US))12/04/2025, 11:30Oral
-
Hosein Gholami (TU Darmstadt)12/04/2025, 11:36Oral
-
Soohwan Lee (Korea University (KR))12/04/2025, 11:42Oral
-
Dana Avramescu (University of Jyväskylä)12/04/2025, 11:48Oral
-
Jaein Hwang12/04/2025, 11:54Oral
-
Sruthy Jyothi Das (University of Illinois Chicago (US))12/04/2025, 12:00Oral
-
Manjunath Omana Kuttan (Frankfurt Institute for Advanced Studies)12/04/2025, 12:06Oral
-
Sara Garetti (Université Paris-Saclay (FR))12/04/2025, 12:12Oral
-
Matisse De Lescluze12/04/2025, 12:18Oral
-
Juliette Authier (Laboratoire Leprince-Ringuet, CNRS (FR))12/04/2025, 12:24Oral
-
Yixuan Jin (Central China Normal University)12/04/2025, 12:29Oral
-
12/04/2025, 12:34
-
12/04/2025, 12:49
-
In Kwon Yoo (Pusan National University (KR)), Yoo In-Kwon (Pusan National University Dept. of Physics)12/04/2025, 13:10Oral
-
Dr Alexander Ayriyan (University of Wroclaw & AANL)
We present a Bayesian analysis of equation of state (EOS) constraints using recent observational data for masses, radii and tidal deformability of pulsars and a class of hybrid neutron star EOS with color superconducting quark matter on the basis of a recently developed nonlocal chiral quark model.
Go to contribution page
The nuclear matter phase is described within a relativistic density functional model of the... -
Charles Robertson III (Purdue University)
In non-central heavy-ion collisions, large orbital angular momentum and strong vorticity fields are produced and predicted to polarize quark spins. Unexpectedly large global spin alignment ($\rho_{00}$) values for ${\phi}$(1020) mesons have been reported in the first phase of the RHIC Beam Energy Scan (BES-I) in Au+Au collisions [1]. These values exceed conventional expectations based on...
Go to contribution page -
Mathias Labonte
One of the main physics goals of the Beam Energy Scan (BES) program at RHIC is to study the QCD phase diagram, especially around the phase transition between the quark-gluon plasma (QGP) and hadronic matter. BES Phase-I studied Au+Au collisions from center-of-mass energies ($\sqrt{s_{_{\rm{NN}}}} $) of 7.7 to 62.4 GeV. BES Phase-II extended these measurements in several important ways, one of...
Go to contribution page -
Analyce Soto-Hernandez (Ohio State University (US))
Results are shown from a one-dimensional femtoscopic analysis of $\text{K}^{0}_{\text{S}}\text{K}^{0}_{\text{S}}$ from Pb–Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV. The centrality and transverse momentum in the pair reference frame $k_{\rm T}$ dependence is analyzed. These results are compared to previous results from ALICE at 2.76 TeV (J. Adams et al., 2015, Physical Review C 92,...
Go to contribution page -
Mr Tingbao Liu (Central China Normal University)
Resonances can give us multiple ways to probe the properties of the QCD matter created in nucleus-nucleus collisions at different time scales. Due to a short lifetime of about $4 fm/c$, $K^{*0}$ will primarily decay inside the fireball formed after the collision. Their decay daughters may undergo various in-medium effects, such as rescattering and regeneration. The resonance to non-resonance...
Go to contribution page -
Jie Zhu (Central China Normal University)
A major source of uncertainty in the study of heavy-ion collision originates from the early time dynamics which includes initial state and pre-equilibrium dynamics. Among these, pre-equilibrium dynamics link the initial particle production in classical field simulations to subsequent hydrodynamic evolution and a (3+1)D framework is necessary to achieve a complete description of the dynamics....
Go to contribution page -
Liubing Chen (Central China Normal University)
Light nuclei, such as deuteron and triton, are loosely bound object and their yields are expected to be sensitive to the baryon density fluctuations and may be used to probe the signature of 1st order phase transition and/or critical point in heavy-ion collisions. In the beam energy scan program at RHIC, the STAR experiment has taken the data of Au+Au collision at center of mass energy...
Go to contribution page -
Seyed Farid Taghavi (Technische Universitaet Muenchen (DE))
The puzzling phenomenon of collectivity in small systems has not been thoroughly explored, and many aspects still require investigation. Given the limitations of applying hydrodynamics to small systems, it is essential to develop alternative collective models that allow for better control over the degree of collectivity. In this poster, we present our latest advancements in solving a 2+1...
Go to contribution page -
Mr Rajeev Singh (Institute of Nuclear Physics Polish Academy of Sciences)
The quark-gluon plasmas produced in non-central relativistic heavy-ion collisions can have large vorticities, leading to spin polarization in a manner analogous to the Barnett effect. Such spin polarization has been observed in $\Lambda$ hyperons [1], spurring rapid development in the area of spin physics in heavy-ion collisions. However, tension remains between experimental data and theories...
Go to contribution page -
Hitansh Shah, Dr Johannès Jahan (University of Houston - Department of Physics)
Although calculations of QCD thermodynamics from first-principle lattice simulations are limited to zero net-density due to the fermion sign problem, it is possible to extend the equation of state (EoS) to finite values of the $B$, $Q$, $S$ chemical potentials via expansions around zero chemical potentials. Taylor expansion around $μ_i = 0$ with $i = B, Q, S$ enables to cover with confidence...
Go to contribution page -
Asanosuke Jinno
We formulate an efficient covariant method for interacting N-body systems with correct density-dependent potential and consistent mass-shell constraints. We implement it in the Monte-Carlo event generator JAM2 and calculate anisotropic flows for RHIC Beam Energy Scan (BES) energies.
Microscopic transport approaches such as Boltzmann-Uehling-Uhlenbeck (BUU) and Quantum Molecular Dynamics...
Go to contribution page -
Claire Moran (Utrecht University)New theoretical developmentsPoster
Despite abundant experimental evidence and numerical hydrodynamic simulations, transport of energy-momentum and charge in anisotropic plasma states, which are produced in off-central collisions, has not been adequately addressed from a theoretical point of view. In Ref. [1], a novel method was introduced, using holography to compute transport coefficients in strongly interacting plasma states...
Go to contribution page -
Saverio Mariani (CERN)
Leveraging on the excellent performance of the LHCb spectrometer and on the flexibility of its online reconstruction, new methods for the identification of deuteron and helium nuclei have been developed at LHCb. These innovative methods, based on LHCb time of flight capabilities and on energy loss discrimination in the LHCb detectors, open a new window of possible measurements at LHCb. A...
Go to contribution page -
Balwan Singh (University of Jammu (IN)), Ramni Gupta (University of Jammu (IN))
The location of critical-point as per quantum chromodynamics (QCD) and the nature of phase transition is the subject of both theoretical and experimental studies. It is observed that local density fluctuations are directly related to the critical behaviour in QCD. As the system approaches phase transition, there is a divergence of the correlation length. The system becomes scale-invariant with...
Go to contribution page -
Isobel Kolbe (University of the Witwatersrand (ZA))
The simultaneous description of jet observables such as the nuclear modification factor $R_{\rm AA}$ and elliptic flow $v_2$ as a function of transverse momentum is a challenge both in large and small colliding systems. For large systems there is the complication of the hydrodynamic background and response, whereas in small systems so far no measurable jet quenching could be identified. This...
Go to contribution page -
Oleksii Ivanytskyi (University of Wroclaw)
Based on a generalized Beth-Uhlenbeck approach to thermodynamics of QCD we explain why the abundances of hadrons produced in ultrarelativistic heavy-ion collisions are well described by the hadron resonance gas (HRG) model with a sudden chemical freeze-out at a well-defined hadronization temperature despite the fact that state of the art results of lattice QCD indicate a smooth chiral...
Go to contribution page -
Sunil Jaiswal (Ohio State University)
Bayesian inference in heavy-ion physics often produces varying estimates of model parameters when varying the physics model and/or the prior assumptions, reflecting a lack of accounting for theoretical uncertainties. Traditionally, a good model-to-data fit is seen as success, with inferred parameters assumed to reflect underlying physics. However, theories have limitations and extending a...
Go to contribution page -
Prof. Claude Andre Pruneau (Wayne State University (US))
Measurements of Balance Functions were proposed more than two decades ago to probe the evolution of particle production in relativistic heavy ion collisions by Pratt et al.. It subsequently emerged that Balance Functions can also be used to probe the susceptibility of QCD matter near the phase transition and the light quark diffusivity. I will briefly review the theoretical work done in the...
Go to contribution page -
Marco Leitão (LIP - Lisbon & IST-UL)
A central ingredient in the description of QCD jets in the quark-gluon plasma is the gluon emission probability off a quark leg. Despite its critical importance, this object has only been computed under a set of approximations concerning both the kinematics of the process and the description of the medium. In this talk we will present new results that go significantly beyond the...
Go to contribution page -
Nicolò Jacazio (Universita e INFN, Bologna (IT))
The ALICE Collaboration observed that the production of light-flavoured hadrons relative to pions increases with the charged-particle multiplicity evolving smoothly across interaction systems and energies, from pp collisions to nucleus-nucleus collisions. Notably, this observation extends to the strange hadron sector, where an enhanced production in heavy-ion collisions with respect to minimum...
Go to contribution page -
Nina Nathanson (University of Copenhagen (DK))
When the Quark Gluon Plasma (QGP) forms during high-energy collisions, the dimensions of the produced droplet are dependent on the overlap region of the colliding nuclei, enabling the QGP to encode information about the initial conditions of nuclear collisions and even the structure of the colliding nuclei. The system of particles produced in the final state exhibit collective behavior, and...
Go to contribution page -
Víctor López Pardo
We analyze the finite temperature potential of X(3872) in the Born-Oppenheimer approximation under the assumption that it is a tetraquark. At large number of colors, the potential is argued to consist in a real part plus a constant imaginary term. The former is calculated using as input at zero temperature lattice QCD determinations of the potential for hybrids. For its extension to finite...
Go to contribution page -
Dr Gabriele Coci (Università di Catania, Dipartimento di Fisica e Astronomia "E. Majorana")
Recent advances in quantum technologies and computation have conduced to novel theoretical developments, which have found applications in various research fields, including high-energy physics. This work presents an open quantum systems approach for studying the suppression of quarkonia [1], which has been considered for many decades a crucial probe for unraveling the main features of hot and...
Go to contribution page -
Tanu Gahlaut (IIT- Indian Institute of Technology (IN))
This study reports measurements of event-by-event fluctuations in mean transverse momentum ($\langle p_{\rm T} \rangle$) using the integral correlator $\langle \Delta p_{\rm T} \Delta p_{\rm T}\rangle$ and the skewness of the event-wise $\langle p_{\rm T} \rangle$ distribution in pp collisions at $\sqrt{s}=13$ TeV. These measurements are conducted with the Monte Carlo event generators PYTHIA8...
Go to contribution page -
Michał Marczenko (University of Wrocław)
I discuss the fluctuations of the net-baryon number near the liquid-gas and chiral phase transitions. I use the parity doublet model to investigate the qualitative properties and systematics of the first- to fourth-order cumulants and their ratios. I show that the fluctuations of the positive-parity (e.g. protons) and negative-parity baryons do not qualitatively reflect the fluctuations of the...
Go to contribution page -
Mr Lucas Constantin
In small collision systems like O-O, the initial energy density profile and pressure gradients driving anisotropic flow are expected to exhibit greater fluctuations compared to larger systems such as Pb–Pb. This emphasizes the significance of initial nuclear geometry and raises questions about the applicability of hydrodynamic evolution in this regime. Investigating collective signals in these...
Go to contribution page -
Iris Likmeta (University of Houston (US))
Anisotropic flow measurements in heavy-ion collisions are sensitive to the spatial distribution of the initial state, and QGP transport properties such as the shear viscosity to entropy density ratio $(\eta/s)$.
Go to contribution page
Hydrodynamic models successfully describe such flow measurements over a wide centrality range. However, the hydrodynamic description of anisotropic flow deviates from the data in... -
Yiyang Peng (Peking University)
The development of collective dynamics in collisions involving small atomic nuclei at RHIC and the LHC is still a hot research topic. In the first part of the talk [1] we explore the applicability of hydrodynamics in small collision systems, using viscous anisotropic hydrodynamics (VAH). VAH is a form of relativistic fluid dynamics specifically designed to handle the large pressure...
Go to contribution page -
João A. Gonçalves (LIP - IST)
Progress in the theoretical understanding of parton branching dynamics within an expanding QGP relies on detailed and fair comparisons with experimental data for reconstructed jets. Such validation is only meaningful when the computed object, whether derived analytically or through event generation, accounts for the complexity of experimentally reconstructed jets. The reconstruction of jets in...
Go to contribution page -
Cristina Terrevoli (Universita e INFN, Bari (IT))
In recent years, CMOS silicon pixel detectors have seen significant advancements and widespread usage across various physics fields, allowing for significant improvements in particle detection technologies. One relevant example is the ALPIDE chip, which is a CMOS Monolithic Active Pixel Sensor developed for the upgrade of the Inner Tracking System of the ALICE experiment at the LHC.
Go to contribution page
On top of... -
Batoul Diab (Université Paris-Saclay (FR))
In high-energy hadron-hadron collisions at the LHC, Multiple Parton Interactions (MPI), where multiple hard-parton scatterings occur in a single collision, play a significant role. Among these, Double Parton Scattering (DPS) represents the simplest case, where two independent scatterings take place simultaneously. The DPS contribution to processes involving two final states, A and B, can be...
Go to contribution page -
Petr Balek (AGH University of Krakow (PL))
In ultra-relativistic heavy-ion collisions, the Lorentz-contracted electromagnetic fields of the ions generate intense quasi-real photon fluxes. These lead to photon-induced interactions that have been observed in ultra-peripheral collisions (UPCs), such as vector meson and lepton-pair production. The high photon flux also enables the occurrence of multiple photon-induced processes in a single...
Go to contribution page -
Dr Deepak Kumar (Institute of Physics)
We investigate the effects of including strong charge parity violating effects through axion field on the structure and the oscillation modes of the neutron stars with the possibility of a quark matter core. The effects of axions in quark matter is described through a t Hooft determinant interaction in the flavor space within the ambit of a three flavor Nambu--Jona-Lasinio model. The presence...
Go to contribution page -
Julia Velkovska (Vanderbilt University (US))
RHIC data taken over two decades showed that even charm quarks thermalize in the hot system formed in Au+Au collisions at $\sqrt{s_{NN}}=$ 200 GeV. These measurements were constrained to the mid-rapidity region, where charm production peaks. The question is what is the longitudinal extension of the charm thermalization and how that would impact the quantification of charm diffusion in the...
Go to contribution page -
Lei Wang (Shandong University)
In recent years, there has been a surge of interest in the electromagnetic processes underlying dilepton production in two-photon scattering, particularly in the context of Ultra-Peripheral heavy ion Collisions (UPC). Our research delves into this phenomenon by examining the azimuthal asymmetry that arises from the multiple interactions of energetic leptons with the medium in UPC...
Go to contribution page -
Samrangy Sadhu (University of Bonn (DE)), Swapnesh Khade (Indian Institute of Technology Indore (IN))
The analysis of azimuthal-correlation distribution between $\rm{D^{0}}$ mesons and charged particles is very important for studying charm-quark production, occuring in the early stages of high-energy collisions via hard scattering. Following their production, charm quarks undergo a fragmentation process which results in a spray of charged hadrons after hadronization, typically collinear to the...
Go to contribution page -
Samuele Cattaruzzi (Universita e INFN Trieste (IT))
The azimuthal correlations of $\text{D}_{\text{s}}^{+}$ mesons with charged particles in high-energy proton-proton (pp) collisions offer a powerful tool for investigating charm-quark production and hadronization mechanisms. By measuring the azimuthal-angle distribution between the direction of the tagged $\text{D}_{\text{s}}^{+}$ meson and those of the other charm hadronization products, it is...
Go to contribution page -
Changhwan Choi (Pusan National University (KR))
The production of beauty quarks can be calculated within perturbative Quantum Chromodynamics (pQCD) due to their large mass, allowing for precise comparisons with experimental results. Beauty-quark tagged jets (b-jets) allow to experimentally reconstruct the kinematics of the scattered beauty quark and probe its subsequent shower evolution.
Go to contribution page
Nonetheless, traditional b-jet tagging algorithms... -
Prof. Claude Andre Pruneau (Wayne State University (US))
In high energy nuclear collisions, the majority of the charm and beauty quark production occurs via perturbative hard scattering on a short timescales and undergoes transport through a medium (which depends on the system), experiencing drag, diffusion, scattering, or recombination into bound states. Investigating these processes requires methods sensitive to both the production cross section...
Go to contribution page -
Christoph Herold (Suranaree University of Technology)
Light nuclei production is expected to be sensitive to a QCD phase transition at large net-baryon densities which are accessible in heavy-ion collisions. I will present results of a study with the UrQMD transport model supplied with a density dependent equation of state including a first-order phase transition. These results include the time evolution of the cumulants up to third order of the...
Go to contribution page -
Mr Kayman Jhosef Goncalves (Unicamp)
Motivated by recent progress in spin hydrodynamics, we investigate the spin density matrix of baryons and vector mesons allowing for non-equilibrium between spin and vorticity.
Go to contribution page
We explain how the coalescence of partially polarized quarks, as well as the transfer of angular momentum from vorticity to the spin of the baryon generically create a partially coherent density matrix.
We argue that... -
Dr Yu Zhang (Guangxi Normal University)
Higher-order cumulants of conserved quantities are proposed as key signatures for studying the QCD phase structure and for exploring the phase boundary and the critical point. It is also suggested that the correlation between baryon and strangeness number is a diagnostic to the degree of freedom of strongly interacting matter and may be used to identify the onset of deconfinement.
In this...
Go to contribution page -
Ashish Pandav
Baryon-strangeness (BS) correlations have been proposed as sensitive observables to probe strongly interacting matter. A particular formulation of BS correlation: $C_{BS}=-3\langle BS \rangle_c/\langle S \rangle^2_c$ (where $\langle BS \rangle_c$ is the mix-cumulant of baryon and strangeness number and $\langle S \rangle^2_c$ is the second order cumulant of strangeness) has been predicted to...
Go to contribution page -
Niklas Götz, Niklas Götz
This study presents the first application of Bayesian inference to a hybrid model that combines hadronic transport as an initial state with a shear and bulk viscosity dependent on both temperature and baryochemical potential. Typically, the extraction of nuclear matter properties, such as viscosities, from experimental data involves Bayesian inference on theoretical models with parametric...
Go to contribution page -
Zhuo Wang
Anisotropic collective flow provides valuable information about the evolution of nuclear matter in the early stages of collisions and is one of the commonly used observables in high-energy heavy ion collisions. The first harmonic coefficient in the Fourier expansion of the
Go to contribution page
final-state azimuthal anisotropy, relative to the reaction plane, is referred to as directed flow, $v_1$.The $v_1$ slope... -
Yuqing Huang
The first harmonic coefficient of the Fourier expansion of the final-state momentum-space azimuthal distribution of produced particles is called directed flow ($v_{1}$). It describes the collective sideward motion of emitted particles. $v_{1}$ is sensitive to the equation of state of nuclear matter, making it a useful probe for studying the phase transition. Results from the RHIC Beam Energy...
Go to contribution page -
Natalia Łygan (Institute of Theoretical Physics, Jagiellonian University, Kraków)
A recently formulated extension of perfect spin hydrodynamics, which includes second-order corrections in the spin polarization tensor to the energy-momentum tensor and baryon current, is studied in the case of a one-dimensional boost-invariant expansion. The presence of second-order corrections introduces feedback from spin dynamics on the hydrodynamic background, constraining possible spin...
Go to contribution page -
Pengzhong Lu (University of Science and Technology of China (CN))
Quarkonium production in high-energy hadronic collisions is sensitive to both perturbative and non-perturbative aspects of quantum chromodynamics (QCD) calculations. From a theoretical point of view, the production of the heavy-quark pair is described by perturbative QCD while the formation of the bound state is a non-perturbative process, treated in different ways by the available theoretical...
Go to contribution page -
Chenzhi Dong (Tsinghua University (CN))
Bottomonium production is sensitive to both the structure of nucleons and
Go to contribution page
the interactions of b quarks with the nuclear media produced in heavy-ion collisions. The LHCb detector’s forward geometry allows for studying bottomonium production in a unique kinematic regime. Recent LHCb studies of bottomonium production will be presented, including multiplicity-dependent measurements sensitive to... -
Ramona Vogt (LLNL and UC Davis), Sabin Thapa
We calculate the suppression of the $\Upsilon$(nS) states in $p+{\rm Pb}$
collisions relative to $p+p$ collisions, including both cold matter effects (nuclear parton distribution function (nPDF) modifications, coherent energy loss, momentum broadening) and hot matter effects.The suppression of bottomonium states in the hot medium is treated two ways: a next-to-leading-order open quantum...
Go to contribution page -
Jakub Sterba
Fluid-dynamic approach should incorporate thermal fluctuations described by the fluctuation-dissipation theorem, as they may have non-negligible influence on relevant final-state observables. In this work, we introduce dynamic fluctuations into the vHLLE hydrodynamic code as a stochastic noise in linearized approximation. Such approach could help understand the evolution of fluctuations for...
Go to contribution page -
Zhengchen Lian (Tsinghua University (CN))
The LHCb experiment’s forward acceptance offers a unique opportunity to study bulk physics in heavy-ion collisions. Properties of bulk particle production, such as the average transverse momentum of charged particles, are sensitive to both collective phenomena and the initial state of heavy-ion collisions. Bulk physics measurements in small collision systems can reveal the interplay between...
Go to contribution page -
Dr Bithika Karmakar (University of Wroclaw)
Understanding the temperature dependence of the viscosity-to-entropy ratio (η/s) is essential for characterizing the properties of the matter produced in ultra-relativistic heavy ion collisions at RHIC and LHC. Low-p⊥ theory and data are, however, weakly sensitive to the commonly assumed forms of the temperature dependence of η/s, especially at high temperatures. To address this, we use...
Go to contribution page -
Joachim Hansen (Lund University (SE))
During Run 3, the ALICE experiment has continued its exploration of the quark-gluon plasma (QGP) through the study of heavy-ion collisions at unprecedented energies of $\sqrt{s_{\mathrm{NN}}} = 5.36$ TeV in Pb–Pb collisions. This study investigates the in-medium modification of jet observables relative to the event plane as a function of certain event properties (event shape engineering), such...
Go to contribution page -
Yu Hu
Understanding nucleon-nucleon (N-N) and hyperon-nucleon (Y-N) interactions is essential for exploring the structure of exotic nuclei and constraining the equation of state (EoS) of nuclear matter. These interactions offer insights into the behavior of baryonic matter under extreme conditions, which are relevant to both nuclear physics and astrophysics. By analyzing femtoscopic correlations of...
Go to contribution page -
Sruthy Jyothi Das (University of Illinois at Chicago (US))
Ultraperipheral collisions of relativistic heavy ion beams lead to a diverse set of photon-nucleus (photonuclear) interactions. Measurements of particles produced in photonuclear reactions can shed light on the QCD dynamics of these novel, extremely asymmetric colliding systems, with energies between those available at RHIC and the LHC. Previous studies by ATLAS have characterized photonuclear...
Go to contribution page -
Tucker Hwang (University of California Berkeley (US))
Energy-energy correlators (EECs), which are energy-weighted cross-sections of particle pairs, offer incisive probes into QCD dynamics, across the full scale of jet evolution, by separating energy scales in the jet fragmentation through the angular distance of the resulting particle pairs. Charged EECs probe the energy flux carried by pairs of the same or opposite electric charges. The...
Go to contribution page -
Luthien Mlynarski (AGH University of Krakow (PL))
LHC Run 4 will provide additional challenges in the already demanding field of charged particle track reconstruction. The Inner Detector of the ATLAS experiment will be replaced by an all-silicon inner tracker (ITk) that will consist of Pixels and Strips providing greater coverage in pseudorapidity spanning up to 8 units. The ACTS Common Tracking Software (ACTS) is the toolkit of choice that...
Go to contribution page -
Abhi Modak (Universita e INFN Trieste (IT))
The pseudorapidity dependence of charged particle production provides information on the partonic structure of the colliding hadrons. It is especially interesting at LHC energies, as this observable is sensitive to non-linear QCD evolution of the initial state. For the Run~3 of LHC, ALICE has upgraded its detectors, increasing its pseudorapidity coverage and tracking of charged particles over...
Go to contribution page -
Mr Gabriele Parisi (Università degli Studi di Catania)
In this work, we simulate $SU(3)$ color fields that
Go to contribution page
occur in the very early stages of
high-energy nuclear
collisions, using classical real-time lattice gauge theory. In particular, we model the structure of the proton and the longitudinal initial state fluctuations to simulate realistic non-boost invariant proton-nucleus collisions. We study the anisotropic momentum, and angular momentum,... -
Juliette Authier (Laboratoire Leprince-Ringuet, CNRS (FR))
The innovative fixed-target programme initiated by the LHCb experiment during the LHC Run 2 has been enhanced for Run 3 with the introduction of a dedicated gas injection system, SMOG2. This upgrade features a gas cell to boost fixed-target luminosity and a new system that allows the injection of non-noble gases. SMOG2 enables the collection of large datasets from pA and PbA fixed-target...
Go to contribution page -
Sara Garetti (Université Paris-Saclay (FR))
Quarkonium production in high-energy lead-lead (Pb-Pb) collisions is a key tool for exploring both the perturbative and non-perturbative aspects of quantum chromodynamics (QCD) calculations.
Charmonia are bound states consisting of a charm and an anti-charm quark. Their production process can be divided into two stages: the creation of the heavy quarks and the formation of the bound state....
Go to contribution page -
Youen Kang (Tsinghua University (CN))
Charmonium production in hadronic collisions is an important experimental observable that sheds light on the heavy quark interaction with the nuclear medium. While the bound quarkonium states undergo dissociation and recombination in PbPb collisions, in pPb collisions they can experience a combination of initial- and final-state effects such as shadowing and comover breakup. A full description...
Go to contribution page -
Victor Gonzalez (Wayne State University (US))
Balance functions have been used extensively to elucidate the time evolution of quark production in heavy-ion collisions. Early models predicted two stages of quark production: one for light quarks and another for the heavier strange quark, separated by a period of isentropic expansion. This led to the notion of clocking particle production and tracking radial flow effects that drive the...
Go to contribution page -
Oana Ristea (University of Bucharest, Faculty of Physics)
The investigation of the properties of nuclear matter under extreme conditions is one of the main goals of the relativistic heavy-ion collisions. The analysis of transverse momentum spectra of produced particles provide insights into the particle production mechanisms as well as the freeze-out conditions of the system created in these collisions. We present the study of the kinetic freeze-out...
Go to contribution page -
Noor Koster
Anisotropic flow is one of the key signatures of the quark--gluon plasma (QGP) created in relativistic heavy-ion collisions at the LHC. This phenomenon is generally quantified by the different harmonics, $v_n$, of the Fourier expansion measured through the azimuthal distribution of final-state particles. In this poster contribution, we report on the first results of $v_n\{m\}$ measurements of...
Go to contribution page -
Yining Gao (Fudan University)
Event-by-event measurements play a crucial role in understanding the high energy nuclear interaction dynamics and the properties of hot and dense medium. Fluctuations of the event-wise average transverse momentum $\langle p_T\rangle$ are related to event-by-event fluctuations of the size and entropy of the initial source. In this poster, we present the first multi-particle cumulant of $p_T$...
Go to contribution page -
Dr. ISHFAQ AHMAD RATHER (Institute for Theoretical Physics, Goethe University, 60438 Frankfurt am Main, Germany)
We explored the astrophysical properties of compact stars in the framework of renormalization Group (RG)-consistent three-flavor color superconductivity (CSC) using the Nambu-Jona-Lasinio (NJL) model with a Renormalization Group (RG)-consistent approach. We analyzed how variations in the vector interaction coupling ($\eta_V$) and diquark coupling ($\eta_D$) affect the equation of state (EoS),...
Go to contribution page -
Maciej Rybczynski (Jan Kochanowski University (PL))
Multiplicity distributions in e+e- and proton-proton collisions analyzed via the combinants method exhibit oscillatory behavior of the modified combinants. The possible sources of these oscillations and their impact on our understanding of the multiparticle production mechanism were discussed [1-5]. The set of combinants, Cj provides a similar measure of fluctuations as the set of cumulant...
Go to contribution page -
169. Comparisons and Predictions for Collisions of deformed 238U nuclei at $\sqrt{s_{NN}} = 193$ GeVSangyong Jeon
Relativistic heavy ion collisions provide exciting new ways to probe nuclear structures. In this talk, we present model-to-data comparisons for the collisions of very-deformed nuclei (U+U collisions at $\sqrt{s_{NN}} = 193$ GeV) and slightly-deformed nuclei (Au+Au collisions at $\sqrt{s_{NN}} = 200$ GeV) at RHIC. For theoretical calculations, we use a multistage model consisting of...
Go to contribution page -
Rohaan Deb (University of Brescia)
This contribution comprehensively presents measurements of charged pions, kaons, and protons produced in Pb-Pb collisions at √sNN = 5.36 TeV using the ALICE detector at the Large Hadron Collider (LHC). Particle identification was achieved through a combination of the Time Projection Chamber (TPC) and the Time-of-Flight (TOF) detectors, allowing for a measurement that spans a broad...
Go to contribution page -
Mahboubeh Shahrbaf
Exotic degrees of freedom, such as hyperons, dark matter, and deconfined quark matter, have attracted significant attention in the theoretical modeling of compact objects like neutron stars, which have extremely dense cores. Our goal is to explore the formation of these particles in high-density environments while maintaining neutron star stability and satisfying observational constraints from...
Go to contribution page -
Swarnim Shirke (Inter-University Centre for Astronomy and Astrophysics)
Neutron Stars (NSs) make a unique physical laboratory with extreme physical conditions that are irreproducible in experiments and capable of inducing a hadron-to-quark deconfinement phase transition in their interior. Given the high densities reached by the cold nuclear matter in NSs, it is speculated that NS cores may contain deconfined quark matter (QM). State-of-the-art inputs from...
Go to contribution page -
Lucia Anna Tarasovicova (Pavol Jozef Safarik University (SK))
The equation of state of nuclear matter at 2-4 times nuclear saturation density is not very well determined by first principle methods. Heavy-ion collisions offer the opportunity to reach those high densities and collective flow measurements are sensitive to the properties of the medium. At 1-2 AGeV per nucleon beam energy transport approaches are the best choice for the theoretical...
Go to contribution page -
Mr Huda Nasrulloh (University of Science and Technology of China)
The STAR experiment conducted isobaric collisions using $^{96}_{44}\text{Ru}+^{96}_{44}\text{Ru}$ and $^{96}_{40}\text{Zr}+^{96}_{40}\text{Zr}$ ions, offering a valuable opportunity to study Coulomb dissociation and investigate nuclear structure. Although these isobars have the same mass number, their differing proton and neutron numbers may lead to distinct charge distributions and neutron...
Go to contribution page -
Wenbo Dong (University of Science and Technology of China)
We present a calculation of the spin alignment for unflavored vector mesons in thermalized quark-gluon plasma based on the Kubo formula in linear response theory. This is achieved by expanding the system to the first order of the coupling constant and the spatial gradient. The effect strongly relies on the vector meson’s spectral functions which are determined by the interaction and medium...
Go to contribution page -
Xin Zhang (Institute of Modern Physics, Chinese Academy of Sciences)
Fluctuations of conserved charges, quantified by the cumulants of order $n$ ($\kappa_{n}$) of their distributions, are powerful observables to probe the QCD phase structure, including the search for the conjectured first-order phase boundary and the associated critical point. On the experimental side, RHIC has successfully completed the second phase of its beam energy scan programme, covering...
Go to contribution page -
Mr MEHULKUMAR SHIROYA (GSI Helmholtzzentrum für Schwerionenforschung GmbH)
Compressed Baryonic Matter (CBM) is a heavy-ion physics experiment designed to probe the QCD phase diagram at high densities. It is being installed at the Facility for Anti-Proton and Ion Research (FAIR) in Darmstadt, Germany, and will use a beam from the new SIS-100 accelerator. The Silicon Tracking System (STS) is the core tracking detector of CBM, tasked with achieving high-precision...
Go to contribution page -
Xiaozhi Bai (University of Science and Technology of China (USTC))
The production of beauty hadrons in proton-proton (pp), proton-lead (p-Pb), and lead-lead (Pb-Pb) collisions offers critical insights into heavy-flavor hadrons production mechanisms across different collision systems. In pp collisions, beauty hadron production can be used to test the predictions of perturbative Quantum Chromodynamics (pQCD), providing constraints on parton distribution...
Go to contribution page -
Mr Coleridge Faraday (University of Cape Town (ZA))
We present novel predictions for the heavy- and light-flavor nuclear modification factor $R_{AB}$ in small systems from a pQCD-based energy loss model, constrained by a comprehensive statistical analysis of central heavy-ion suppression data. Our large-system-constrained results are validated by their consistency with the light-flavor photon-normalized $R_{AB} \sim 0.75$ measured in central...
Go to contribution page -
Shuang Guo (Fudan university)
Deep learning (DL) techniques have emerged as powerful tools for advancing our understanding of high-energy nuclear physics. We employ DL methods to probe two crucial phenomena: collective flow in small colliding systems and the chiral magnetic effect (CME) in heavy-ion collisions.
Collective flow is similar between small colliding systems ($p$ $+$ $p$ and $p$ $+$ A collisions) and large...
Go to contribution page -
Mr Jhoao Gabriel Martins Campos Almeida Arneiro (Universidade de Sao Paulo (USP) (BR))
The use of neural networks in high-energy physics has rapidly expanded, particularly in jet tagging applications. This study explores two parallel methods, both leveraging convolutional neural networks (CNNs) to classify jets produced in high-energy collisions by differentiating between heavy quark (charm, bottom), light quark (up, down, strange), and gluon jets. The first method constructs...
Go to contribution page -
Rainer Fries (Texas A&M University)
The evolution of jets showers in high energy nuclear collisions is influenced in various ways by the presence of a surrounding medium. The interaction of jet constituents with the medium can happen during the partonic stage of the jet, during hadronization, and even during its hadronic stage. We will demonstrate how flow of the ambient medium in a direction transverse to the jet can introduce...
Go to contribution page -
Dr Juergen Eser
We discuss the thermodynamics of dense nuclear matter in the so-called parity-doublet model, in an extended mean-field approximation. Special emphasis is given to the phase structure at zero temperature and large baryon densities. The model includes the nucleon and its chiral partner. It also accommodates a nucleon mass that is compatible with the chiral symmetry of QCD, in contrast to many...
Go to contribution page -
Selina Kunkel
We study the minimal masses and radii of proto-neutron stars during different stages of their evolution. The main focus lies on the stages directly after the supernova outward shock wave where neutrinos are captured in the core and the lepton per baryon ratio is approximately $Y_L = 0.4$ and a few seconds afterwards, when all neutrinos have left the star. All equations of state used for this...
Go to contribution page -
Nikodem Witkowski
A recently formulated thermal model for hadron production in heavy-ion collisions in the few-GeV energy regime is combined with the idea that some part of protons and neutrons present in the original thermal system forms deuterons via the coalescence mechanism. Using realistic parametrizations of the freeze-out conditions, which reproduce well the spectra of protons and pions, we make...
Go to contribution page -
Koshiro Yoda (University of Tsukuba (JP))
In high-energy physics experiments, silicon detectors play an important role in the discovery of new physical phenomena. In the research and development of detectors with silicon pad sensors, a simple preamplifier is essential to evaluate the performance of silicon pad sensors. We have therefore developed a versatile readout circuit for detectors that can be used in both test beam and...
Go to contribution page -
Karina Scharmann (Justus-Liebig-Universität Gießen)
In this contribution we present preliminary results on the dielectron production in p+p interactions at 1.58 GeV beam energy measured with the High Acceptance DiElectron Spectrometer (HADES). The HADES RICH detector has been upgraded with a new photon detection camera which strongly enhances the electron efficiency and conversion pair rejection. With this upgrade, a signal-to-background ratio...
Go to contribution page -
Adrian Meyer-Ahrens
The Compressed Baryonic Matter (CBM) experiment is a fixed-target experiment currently under construction at FAIR in Darmstadt which will explore the QCD phase diagram at high net-baryon densities using heavy-ion beams in the kinetic energy range of 2-11 AGeV provided by the SIS100 accelerator complex. Dielectrons serve as versatile probes for properties of the hot and dense medium created in...
Go to contribution page -
Kangkan Goswami (Indian Institute of Technology Indore), Raghunath Sahoo (Indian Institute of Technology Indore (IN))
We estimate the diffusion coefficient matrix for baryon number, strangeness, electric charge, and charm quantum numbers in an interacting hadron gas. For the first time, this study provides insights into the charm current and estimates the diffusion matrix coefficient for charmed states, treating them as part of a quasi-thermalized medium. We analyze the diffusion matrix coefficient as a...
Go to contribution page -
Laura Huhta (University of Jyvaskyla (FI))
In this poster, the first ALICE measurements of dijet invariant mass spectra of charged-particle jets are presented for pp and p--Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV. Dijet invariant mass measurements in small systems provide a baseline for dijet studies in Pb--Pb collisions, in which dijet properties can act as sensitive probes of jet quenching in the quark-gluon plasma. For this...
Go to contribution page -
Wen-Hao Zhou (西安航空学院)
The dilepton production yield is sensitive to the nuclear density within the partonic and hadronic matter, which can be influenced by the initial states of the nuclei. The production of dileptons in the Au+Au and U+U collision systems is studied at relativistic heavy-ion collisions with different initial nuclear deformation profiles. Moreover, the contributions of dileptons from both...
Go to contribution page -
Mika Spier
Leading-order pQCD calculations have shown dileptons to be a promising signature of the preequilibrium in ultrarelativistic heavy-ion collisions. This work extends the analysis of dileptons as a probe of chemical equilibration to next-to-leading order accuracy. Since the system is far-from-equilibrium, we employ the real-time formalism of quantum field theory to perform this kind of...
Go to contribution page -
Tudor Pătuleanu (West University of Timișoara)
The growing interest in the thermodynamic properties of strongly-interacting systems under rotation, particularly using lattice gauge techniques on the Euclidean manifold and with an imaginary angular velocity $\Omega = i \Omega_I$, has motivated the current study of Dirac fields under imaginary rotation. For $\nu = \beta \Omega_I / 2 \pi$ a rational number, the thermodynamics of free scalar...
Go to contribution page -
Mike Sas (Nikhef National institute for subatomic physics (NL))
Direct photon measurements provide essential insights into the properties and evolution of the quark-gluon plasma (QGP), from the early initial conditions through the pre-equilibrium stage to the QGP and hadronic phases. In the ALICE experiment, photons are reconstructed using two complementary methods: the photon conversion method, making use of the excellent tracking capabilities of ALICE,...
Go to contribution page -
Dr Hikari Murakami (Nagoya University (JP))
In this poster, the first measurement of direct photons at the transverse momentum of $1 < p_{{\rm T}} < 6$ GeV/$c$ at midrapidity $|\eta| < 0.8$ in inelastic and high-multiplicity proton--proton collisions at a centre-of-mass energy of $\sqrt{s}$ = 13 TeV is presented. The fraction of virtual direct photons in the inclusive virtual photon spectrum is obtained from a fit to the dielectron...
Go to contribution page -
Junyi Han (Central China Normal University)
Studying hyper-nuclei yields and their collectivity can shed light on their production mechanism as well as the hyperon-nucleon interactions. Heavy-ion collisions from the RHIC beam energy scan phase II (BES-II) provide an unique opportunity to understand these at high baryon densities.
Go to contribution page
In this poster, we present the first measurement of directed flow ($v_{1}$) for $^{4}_{\Lambda}{\rm He}$... -
Shubhalaxmi Rath (Universidad de Tarapacá)
This work focuses on the effects of rotation on the transport coefficients and observables of the QGP medium. Since the noncentral heavy ion collisions possess finite angular momentum with a finite range of angular velocity, the rotation gets incited in the produced medium. The rotation could significantly alter the transport coefficients and observables, such as the electrical conductivity,...
Go to contribution page -
Pei Li (Fudan University)
The initial condition in relativistic heavy-ion collisions is sensitive to the nuclear structure of the colliding nuclei. Experimental observations in U+U and isobar collisions have revealed nuclear structure effects, such as deformation or neutron skin. For smaller colliding systems such as $^{20}$Ne+$^{20}$Ne collisions, where the number of nucleons is limited, cluster models are typically...
Go to contribution page -
Ms Bushra Ali (Aligarh Muslim University (IN))
ALICE data recorded from pp collisions at $\sqrt{\it s}=13$ TeV are analyzed to study the mean transverse momentum ($p_{\rm T}$) fluctuations. The study is motivated by the idea that non-monotonic changes in $p_{\rm T}$ correlations with varying energy, if observed, may be taken as an indicator for the QGP formation. The mean $p_{\rm T}$ fluctuations are studied in terms of the two-particle...
Go to contribution page -
Kevin P. Pala
The beam energy scan probes the QCD phase diagram from high temperatures, low densities (high energies) to low temperatures and high densities (low energies). At high energies the system is boost-invariant such that 2+1D simulations using hyperbolic coordinates can reasonably capture most of the dynamical behavior for symmetric collisions, but as one lowers the beam energies the Lorentz...
Go to contribution page -
Kevin P. Pala
Ultrarelativistic isobar collisions have been proposed as a useful tool for investigating nuclear structures. The complete description of these high-energy collisions involves a hydrodynamic expansion preceded by a pre-thermal equilibrium phase. Because hydrodynamic simulations are time-consuming, isobar nuclear structure has been discussed a lot in terms of geometrical estimators such as...
Go to contribution page -
Vincenzo Nugara
We employ a Relativistic Full Boltzmann Transport approach to investigate the emergence of universality in a wide range of collision systems, starting from a typical $pp$ setup and going up to $pA$ and $AA$ collisions. Our focus is concentrated on the attractor behaviour in the momentum moments of the distribution function and in the anisotropic flows $v_n$, with particular attention on the...
Go to contribution page -
Mykhailo Hontarenko (Jagiellonian University)
The concept of pseudo-gauge freedom, which is essential for defining conserved currents in effective field theories like relativistic hydrodynamics, continues to inspire significant debate and re-interpretation. In this talk, I will present recent insights that clarify the role and limitations of pseudo-gauge transformations and pseudo-gauge invariance in hydrodynamic systems.
For...
Go to contribution page -
Mr Rutik Manikandhan (University of Houston)
The study of event-by-event transverse momentum $<p_{T}>$ fluctuations and $p_{T}$ correlations between particles provide insight into the properties of the hot and dense matter created in Au+Au collisions at the Relativistic Heavy-Ion Collider (RHIC). These measures have been proposed as tools to understand the initial state geometry and subsequent evolution of the system as well as quantify...
Go to contribution page -
Mr Ashutosh Dwibedi (Indian Institute of Technology Bhilai (IIT Bhilai))
In off-central heavy ion collisions (HIC), an appreciable amount of initial orbital angular momentum (OAM) of the colliding heavy nuclei can be transferred to the participants and subsequently to the nuclear medium formed [1]. This transferred OAM can give rise to local vorticity in the created matter. The transport coefficients of the matter formed in HIC give ample information about the...
Go to contribution page -
Dr Lin CHEN (Instituto Galego de Fisica de Altas Enerxias - IGFAE), Xiang-Pan Duan (Fudan University)
In this talk, we will discuss the effects of color decoherence and virtuality evolution on jet quenching observed in relativistic heavy-ion collisions. First, we will show that the jet multiplicity, calculated according to the color coherence picture, provides a reasonable description of inclusive jet data up to $p_T \sim 1$ TeV in pp collisions at the LHC. Building on this understanding of...
Go to contribution page -
Vyshakh B R (Tata Institute of Fundamental Research, Mumbai)
Heavy-Quarkonia evolution in quark-gluon plasma (QGP) can be studied using the framework of open quantum systems. The density matrix of the quarkonia satisfies a simple Lindblad-type equation if one assumes that the binding energy $E_b$ is much smaller than the medium temperature $T$. This approximation does not hold for a significant part of the QGP evolution. We study the evolution of...
Go to contribution page -
Feng-lei Liu
Jet thermalization is a useful tool for investigating the properties of the quark-gluon plasma (QGP) formed in relativistic heavy-ion collisions. Temperature and energy are two important scales in jet thermalization. In this study, we discretize the collision kernel of scalar theory to directly compute the eigenvalues and eigenmodes of the evolution operator, enabling an analysis of the roles...
Go to contribution page -
Adrian William Romero Jorge (FIAS, Frankfurt Univ.)
Elecromagnetic probes, such as dileptons, can provide a clear information about the properties of strongly interacting hadronic and partonic matter created in heavy-ion collisions since they are undisturbed by the strong final state interaction. The dileptons are emitted during the whole evolution of the expanding system from many different sources - from hadron decays to the quark-gluon...
Go to contribution page -
Vinícius Franção
The ultrarelativistic motion of charges in heavy-ion collisions is responsible for generating extreme electromagnetic fields, with magnetic fields of the order of $10^{18} \; G$ (for RHIC energies) [1]. However, the fields are very short-lived and their effects on the dynamics of the hot and dense matter produced in the collision are not well understood. In this work, we use a hybrid...
Go to contribution page -
Chiara De Martin (Universita e INFN Trieste (IT))
Particle production in heavy-ion collisions exhibits a collective behaviour known as collective flow, which arises from the pressure-driven expansion of the quark-gluon plasma (QGP) formed in these collisions.
Go to contribution page
The second-order Fourier coefficient of a series expansion of the azimuthal distribution of final-state particles is known as elliptic flow ($v_2$). A non-zero $v_2$ can lead to the... -
Sarjeeta Gami (National Institute of Science Education and Research (NISER) (IN))
Hadronic resonances are crucial probes to understand the various phases of matter created during relativistic heavy-ion collisions. Due to their short lifetimes, the yields of these resonances can be affected by competing rescattering and regeneration mechanisms in the final hadronic phase. Rescattering can alter the momentum of the resonance decay products, limiting their reconstruction...
Go to contribution page -
Ms Syed Afrid Jahan (Wayne State University)
We present a systematic Bayesian analysis of Quark-Gluon Plasma (QGP) properties at finite baryon density using measurements of Au+Au collisions at the RHIC Beam Energy Scan program. The theoretical model simulates event-by-event (3+1)D dynamics of relativistic heavy-ion collisions with the state-of-the-art hybrid hydrodynamics and hadronic transport theory. We analyze the model's...
Go to contribution page -
Franciszek Pauwels (Charles University (CZ))
Understanding energy reconstruction in the forward rapidity region is crucial for the definition of collision centrality as well as for the measurements of jet suppression in the forward region. In this poster, we discuss the performance n the forward rapidity region of the ATLAS detector in 2023 and 2024 Pb+Pb data for both total energy reconstruction and jet reconstruction. Jet...
Go to contribution page -
Dr Liuyao Zhang (Fudan University (CN))
We extensively investigate the mean transverse momentum fluctuations concerning centrality and energy dependences in Au–Au collisions at 3.0–19.6 GeV using a multiphase transport (AMPT) model. Inspired by prior research, we have adjusted the key parameter, the Lund string fragmentation parameter bL, to manifest an approximately linear dependence on the impact parameter. Consequently, the mean...
Go to contribution page -
Maxim Virta (University of Jyväskylä)
The evolution of the strongly interacting medium formed in heavy-ion collison is modelled with multi-stage models. The models are driven by a large number of parameters that quantify the properties of the medium and the initial stage of the heavy-ion collision. The need to find model parameters which give the best description of the experimental data imposes a multidimensional optimization...
Go to contribution page -
Radim Dvořák
The development of the Forward Spectator Detector (FSD) of the CBM
Go to contribution page
experiment represents a crucial step towards the successful realization of the CBM
physics program – understanding of highly compressed nuclear matter at the
FAIR facility currently under construction. FSD is a scintillator-based detector which is positioned at forward rapidity in order to detect spectator nucleons and... -
Pooja Pooja (University of Jyväskylä)
We investigate the dynamics of heavy quarks during the initial stages of relativistic nuclear collisions. The initial pre-equilibrium stage of heavy-ion collisions, commonly known as Glasma, evolves according to the classical Yang-Mills (CYM) equations. Heavy quarks are coupled to the evolving Glasma fields via relativistic kinetic theory. We compute the momentum broadening as well as the...
Go to contribution page -
Jaehyeok Ryu (Pusan National University (KR))
Jet substructure measurements, based on the distribution of final-state hadrons, offer insights into parton shower dynamics and hadronization. Observables such as the transverse momentum fraction ($j_\mathrm{T}$) and longitudinal momentum fraction ($z$) of jet constituents, provide valuable information on these processes. The ALICE collaboration has recently reported measurements of the...
Go to contribution page -
Oleksandra Panova (Jan Kochanowski University (PL))
NA61/SHINE is a multipurpose fixed-target experiment located at CERN SPS. One of its main goals is to study the onsets of fireball and deconfinement and the properties of strongly interacting matter. For this purpose, a unique two-dimensional scan in collision energy ($\sqrt{s_{NN}} = 5.1 - 17.3$ GeV) and system size was performed. Results for p+p, Be+Be, and Ar+Sc collisions were already...
Go to contribution page -
João Paulo Sampaio Santos (UERJ)
For cold, ultra-dense matter, color superconductivity is characterized by the formation of Cooper pairs of quarks through gluon exchange, yielding a frequency-dependent superconducting gap on the order of 100 MeV. Conversely, the phenomenon of confinement is characterized by the fundamental particles confined within hadrons at low to intermediate energies. In this regime, lattice QCD has shown...
Go to contribution page -
Zachary Akridge (Indiana University)
The spin polarization of hadrons emitted from heavy-ion collisions can serve as a probe of the angular momentum contained within the colliding system. Recent measurements of hyperon global spin polarization at midrapidity from ALICE, STAR, and HADES, spanning a collisional beam energy range from O(1000) to O(1) GeV, have shown a monotonic trend of continually increasing signal with decreasing...
Go to contribution page -
Omar PerFig
In this poster, we present first results for a state of the art calculation to obtain the quark-gluon matter pressure at finite chemical potential. To this end we employ Dyson-Schwinger equations (DSE) in a 2+1 flavor scenario that has been tested successfully elsewhere in the QCD phase diagram. The equation of state for quark-gluon matter can be used as input for the hydrostatic equilibrium...
Go to contribution page -
Mr Marc-André Petri (Bergische Universität Wuppertal)
Equation of State at finite density in external magnetic fields aiming for an experimental setup
Probing the QCD phase diagram is a challenging task both from a theoretical and an experimental standpoint. Moreover heavy ion collision experiments have shown, that strong magnetic fields arise, which may have a sizeable impact on the phase diagram. From the lattice QCD perspective the...
Go to contribution page -
László Kovács
In high-energy collisions, by measuring the two-particle Bose–Einstein correlation function and considering its relationship with the phase-space density of the particle-emitting source, we can obtain information about the source function. While a Gaussian shape is commonly assumed, anomalous diffusion suggests Lévy-stable distributions, as observed in the PHENIX experiment for kaon-kaon and...
Go to contribution page -
Dr Kaiyi Wu (CCNU)
In high-energy heavy-ion collisions, jets traverse the quark-gluon plasma (QGP) and deposit energy into the medium, leading to jet-induced medium response. The medium response takes the form of Mach-cone-like excitations and can modify the internal structure of the jet, affecting many observables, such as jet shape and jet fragmentation function and so on. However, Simulation of jet-induced...
Go to contribution page -
Tanu Gahlaut (IIT- Indian Institute of Technology (IN))
Mean transverse momentum ($ \langle \it{p}_{\rm T} \rangle$) fluctuations are dynamic indicators of system properties, arising from correlations among the transverse momenta of final-state particles, such as those due to resonance decays and jets. Consequently, event-by-event $ \langle \it{p}_{\rm T} \rangle$ fluctuations in pp collisions serve as a model-independent baseline to explore...
Go to contribution page -
Ante Bilandzic (Technische Universitaet Muenchen (DE))
In ultrarelativistic heavy-ion collisions, several nontrivial physics phenomena (e.g. collective anisotropic flow, jet quenching, etc.) can lead to persistent event-by-event azimuthal anisotropies in particle distributions, which are traditionally quantified with Fourier harmonics $v_n$. Besides the conventional measurements of individual $v_n$ harmonics, further independent information about...
Go to contribution page -
Yi-Liang Yin
We study the evolution of the spin alignment of neutral $\rho$ mesons in a pion gas using spin kinetic or Boltzmann equations. The $\rho\pi\pi$ coupling is given by the chiral effective theory. The collision terms at the leading and next-to-leading order in spin Boltzmann equations are derived. The evolution of the spin density matrix of the neutral $\rho$ meson is simulated with different...
Go to contribution page -
Man Singh (Indian Institute of Technology Madras (IN))
Exclusive photoproduction of vector mesons offers a valuable tool for probing the gluon distribution within nucleons . Measuring vector mesons of various masses over a wide range of rapidity and as a function of transverse momentum provides important information on the evolution of the gluon distribution within nuclei. Results from $J/\psi$ and $\Upsilon$(1S) mesons in pPb collisions at a...
Go to contribution page -
Oral
-
Yu Zhang
In this study, we investigate the effective restoration of axial U(1) symmetry by calculating the scalar and pseudo-scalar meson screening masses using Möbius domain wall fermions with physical quark masses. Unlike the widely used staggered fermions, which suffer from taste violations that lead to unphysical behavior-such as scalar screening masses failing to reach their physical values at low...
Go to contribution page -
Dr Morino Y (KEK-IPNS)
Many phenomena are expected, such as the transition to the deconfined phase and color superconductivity(CSC), in ultra-high density matter. Heavy ion collision with $\sqrt{s_{NN}}=$ <$\sim$5 GeV is expected to be most advantageous to generate and study such ultra-high densities($\rho>3\rho_{0}$).
Go to contribution page
J-PARC Heavy Ion Project(J-PARC-HI) is an experimental project aimed at studying the ultra-high... -
Carl Rosenkvist (Frankfurt Institute for Advanced Studies)
Strangeness production is a key signature of the formation of a hot and dense medium in heavy-ion collisions. Understanding the production mechanisms across different system sizes remains a significant challenge in this field. Hybrid approaches, particularly those based on transport theory and hydrodynamics, such as the core-corona picture, have been successfully applied in previous...
Go to contribution page -
ADITYA PRASAD DASH (University of California Los Angeles)Collective dynamics & small systemsPoster
Charge-dependent directed flow can reveal the influence of electromagnetic fields in heavy-ion collisions. For instance, Faraday induction is predicted to contribute negatively to $\Delta (dv_1/dy)$, defined as the difference in the slope of rapidity-odd directed flow ($dv_1/dy$), between positively and negatively charged particles. Recent STAR data from peripheral Au+Au collisions at...
Go to contribution page -
Dr Mohammad Yousuf Jamal (Institute of Particle Physics, Central China Normal University, Wuhan 430079, China)
The study of heavy quark (HQ) dynamics in the quark-gluon plasma (QGP) produced in heavy-ion collisions at facilities like RHIC and LHC has provided crucial insights into QGP properties. Due to their large masses, HQs evolve over the QGP’s short lifetime while retaining information about their interaction with the medium. Typically, HQ evolution is studied using the Langevin equation under the...
Go to contribution page -
Jasper Parkkila (Warsaw University of Technology (PL))
In high-energy collider physics, a key question is whether quark--gluon plasma (QGP) is formed in proton-proton (pp) collisions. Recent observations suggest that collectivity exists in pp collisions, although signatures of jet quenching would provide stronger evidence. This study examines jet quenching in pp collisions at two different beam energies: $\sqrt{s}=13$ TeV (LHC Run 2) and...
Go to contribution page -
Juan Torres-Rincon (Universitat de Barcelona)
In this presentation, we investigate femtoscopy correlation functions to access the interactions of protons across various hadrons with different baryon numbers. Beginning with the proton-pion system, we apply the results of the unitarized chiral effective theory into the TROY (T-matrix-based Routine for HAdrOn FemtoscopY) framework to predict measurable correlation functions in...
Go to contribution page -
Anju Bhasin (University of Jammu (IN))
The measurement of strangeness production is a key tool for understanding the hot, dense matter created in relativistic heavy-ion collisions. The production of strange hadrons is enhanced in heavy-ion collisions due to thermal gluon saturation, while it is suppressed in small systems due to canonical suppression, as supported by canonical models. Despite being one of the earliest signatures of...
Go to contribution page -
Shirajum Monira (Warsaw University of Technology (PL))
Angular (ΔηΔφ) correlations of identified particles in ultrarelativistic proton-proton and heavy-ion collisions exhibit features dependent on collision systems and particle types. These characteristics stem from mechanisms such as (mini-)jets, elliptic flow, resonance decays, and conservation laws, with quantum statistics and final-state interactions influencing each particle pair’s unique...
Go to contribution page -
Ferdinando Frascà
We present a self-consistent method to describe a conformal
Go to contribution page
plasma composed of three quark flavors (particles + anti-particles) in the
presence of strong magnetic fields by means of kinetic-theory tools. Based
on a specific ansatz for the dissipative correction to the equilibrium
distribution function, we explicitly solve the Boltzmann equation in
relaxation-time approximation, including... -
Manjunath Omana Kuttan (Frankfurt Institute for Advanced Studies)
Various approaches to exploring QCD Equation of State (EoS) using modern machine learning/deep learning techniques are presented. In the first part, various existing experimental measurements are used in a Bayesian framework [1] to constrain the density dependent potentials in UrQMD [2] for densities from 2 to 6 times saturation densities ($n_0$). It is shown that while the observables used in...
Go to contribution page -
Kshitish Kumar Pradhan (IIT Indore)
Understanding the phases of quantum chromodynamics (QCD) matter has become one of the important research areas for both theoretical and experimental high-energy physics community. In the QCD phase diagram, which is characterised by temperature ($T$) and baryochemical potential ($\mu_B$), a first-order phase transition is expected at high $\mu_B$ and low T, which ends at a possible critical...
Go to contribution page -
Lang Xu (Central China Normal University CCNU (CN))
An enhancement of the strange baryon-to-meson yield ratio has been observed by ALICE for intermediate transverse momentum ($p_{\rm T}$) at high multiplicity from small to large colliding systems. This enhancement is possibly due to the effects of collective radial flow and recombination of quarks. However, there is ongoing debate regarding whether jet fragmentation could also play a role, as...
Go to contribution page -
Jesper Karlsson Gumprecht (Austrian Academy of Sciences (AT))
The 'ALICE 3' project is a proposed upgrade of the ALICE detector, which involves a complete replacement of the installation at Point 2. Crucial to the physics programme are high-precision measurements of heavy-flavour observables that require large data samples as well as state-of-the-art tracking performance. As a consequence, performance studies of the operating conditions of ALICE 3 that...
Go to contribution page -
Cornelius Feier-Riesen
The Compressed Baryonic Matter experiment (CBM) at FAIR is designed to
Go to contribution page
explore the QCD phase diagram at high net baryon densities and moderate
temperatures by means of heavy ion collisions with energies from 2-11 AGeV beam energy (Au+Au collisions) and interaction rates up to 10 MHz, provided by the SIS100 accelerator. Leptons as penetrating probes not taking part in the strong interaction... -
Sergio Morales Tejera (West University of Timisoara)
We study the linear sigma model coupled with dynamical quarks undergoing rigid rotation in unbounded Minkowski spacetime under the Tolman-Ehrenfest approximation. The thermodynamics of this rigidly rotating system induces, kinematically, an infinite local temperature state at the light cylinder, where the velocity of the system equals the speed of light. We show that the infinite-temperature...
Go to contribution page -
Ida Storehaug (University of Oslo (NO))
Ida Storehaug, for the ALICE Collaboration
The $\text{B}^\pm$ meson is the most frequently produced beauty meson in proton-proton (pp) collisions at the LHC. Measuring its production cross-section is important for two reasons. First, it allows for testing of perturbative quantum chromodynamics calculations. Second, the $\text{B}^\pm$ meson cross-section measurement provides an essential...
Go to contribution page -
Sukyung Kim (Bergische Universtaet Wuppertal)
Dileptons are excellent probes for studying the hot, dense hadronic matter created in heavy-ion collisions, as they do not participate in the strong interaction in the medium and carry undisturbed information from all stages of the fireball evolution.
In this contribution, we present preliminary results on anisotropic flow of di-electrons produced in Au+Au collisions at $\sqrt{s_{NN}}=2.23$...
Go to contribution page -
Luis Alcerro Alcerro (The University of Kansas (US))
Coherent photoproduction of vector meson (VM) in heavy-ion ultrapheripheral collisions (UPCs) is highly sensitive to the gluon distributions within heavy nuclei, making it a powerful tool for probing the nuclear gluonic structure. It is of particular interest for investigating nonlinear dynamics such as gluon saturation and nuclear shadowing effects in the small Bjorken-x region. The mass of...
Go to contribution page -
Xihe Han
We present the first measurement of photoproduction of $\phi$ mesons in ultra-peripheral Au+Au collisions at a center-of-mass energy of $\sqrt{s_{NN}} = 200~\mathrm{GeV}$ using the STAR detector at RHIC. The $\phi$ mesons are reconstructed through their decay into $K^+ K^-$ pairs, enabled for the first time by the extended low transverse momentum ($p_T$) coverage provided by the STAR inner TPC...
Go to contribution page -
Diana Krupova (Czech Technical University in Prague (CZ))
Theory predicts that the inner structure of hadrons changes with increasing energy, and that gluon saturation can occur in heavy nuclei at lower energiescompared to protons. Additionally, phenomena such as gluon shadowing can exhibit similar experimental signatures to gluon saturation. ALICE has recently presented new results on coherent J/ψ mesons, where the photon probes the entire nucleus....
Go to contribution page -
Rebecca Cerri (Universita e INFN Torino (IT))
Quarkonia, which are bound states of heavy-flavor quark-antiquark pairs, have long been considered crucial probes for studying the quark–gluon plasma (QGP). In a simplified picture, the production of quarkonium is suppressed due to color screening within the QGP, formed during nucleus–nucleus collisions. A key observable in this context is the azimuthal anisotropy of quarkonia, providing...
Go to contribution page -
Chenlu Hu (University of Chinese Academy of Sciences)
The large angular momentum generated in non-central heavy-ion collisions contributes to the formation of vorticity within the medium, which subsequently induces polarization of particles with non-zero spin. The global polarization of Λ-hyperons near mid-rapidity increases at lower energies, which can be attributed to the correlation between angular momentum and enhanced baryon stopping. Recent...
Go to contribution page -
Anton Albert Riedel (Technische Universitaet Muenchen (DE))
The large minimum bias (MB) dataset of pp collisions at
Go to contribution page
√s = 13.6 TeV collected by ALICE during Run 3 provides an unprecedented opportunity to measure, for the first time, the transverse mass ($m_{\rm T}$) scaling of the femtoscopic source of proton–proton pairs as a function of the event multiplicity.
A common source size dependence on $m_{\rm T}$ , typically attributed to collective... -
Jiazhao Lin (Rice University (US))
A key objective of high-energy nuclear physics is the search for the onset of gluon saturation phenomena in the limit of extreme gluon densities. Photon-induced vector meson production in ultraperipheral heavy-ion collisions (UPCs) offers a unique and powerful probe of the gluon distribution in nuclei. The $\phi$ meson, with its mass around 1 GeV, lies at the boundary of hard scales between...
Go to contribution page -
Mateusz Ludwik Bajda (Jagiellonian University (PL))
The measurement of open charm production is considered as an important tool for investigating the properties of hot and dense matter formed in relativistic nucleus-nucleus collisions and will allow for a model-independent interpretation of existing data [1].
The formation of hadrons containing charm quarks is particularly sensitive to quark-gluon plasma (QGP) creation. The NA61/SHINE...
Go to contribution page -
Gyula Bencedi (HUN-REN Wigner Research Centre for Physics (HU))
The centrality estimation in proton-nucleus collisions at the LHC is typically based on measuring charged-particle multiplicity or zero-degree energy. The former, however, induces a bias on the hardness of the proton-nucleon collisions, resulting in deviations from the binary nucleon-nucleon scaling of hard processes. In contrast, the energy deposited at zero degrees, i.e. at forward...
Go to contribution page -
Agnieszka Ewa Ogrodnik (Charles University (CZ)), Martin Rybar (Charles University (CZ)), Martin Spousta (Charles University)
We use the parametric approach to analyze jet suppression measured using the nuclear modification factor of inclusive jets and jets from gamma-jet events. With minimum model assumptions, we quantify the magnitude of the average energy loss, its pt-dependence, and flavor dependence. Further, we quantify the impact of fluctuations in the energy loss and nuclear PDFs on the measured jet...
Go to contribution page -
Mr Yichao Dang (Shandong University)
We investigate the flavor dependence of parton splitting inside a color-deconfined medium by examining the suppression factor, substructures, and jet axis decorrelation of inclusive jets, $c$-jets and $b$-jets. Utilizing the linear Boltzmann transport model that treats light and heavy flavor parton scatterings with the quark-gluon plasma (QGP) on an equal basis, we provide a simultaneous...
Go to contribution page -
Alexian Marc Lejeune (Czech Technical University in Prague (CZ))
To study the nature of collective phenomena in small collision systems, this contribution presents the measurement of the second harmonic of the anisotropic flow of heavy-flavor hadrons such as $D_0$ and $Λ^+_C$, also denoted as elliptic flow or $v_2$. The two-particle correlations method is used, where heavy-flavor candidates are correlated with hadrons.
Heavy-flavor candidates are...
Go to contribution page -
Hao-Lei Chen (Fudan University)
In this work, we discuss the impact of phase transitions on quark spin fluctuation and correlation. We propose a novel observable for quark-antiquark correlation that relates to vector meson spin alignment and $\Lambda-\bar\Lambda$ correlation. Using the NJL model, we qualitatively study the properties of quark-antiquark spin correlation. Our findings reveal a peak structure near the CEP,...
Go to contribution page -
Shihai Jia (University of Copenhagen (DK))
The Forward Calorimeter (FoCal) is a new sub-detector for ALICE, planned for installation during Long Shutdown 3, designed to have unique capabilities for measuring direct photon production at forward rapidity. FoCal-H, the hadronic calorimeter segment of this upgrade, is designed as a scintillating-fiber calorimeter. Its front-end electronics utilize the H2GCROC ASIC to read out signals from...
Go to contribution page -
Naomi Oei
We present a microscopic model to study the formation, as well as dissociation and recombination processes of charmonium states in the quark gluon plasma. In this classical approach, heavy quarks are described as Brownian particles in a background medium of light constituents. The heavy-quark dynamics are modelled by a Fokker-Planck equation with constant transport coefficients, which is then...
Go to contribution page -
Podist Kurashvili (National Centre for Nuclear Research (PL))
The CERN ALICE Collaboration proposes the new ALICE 3 detection system to exploit the full potential of the HL-LHC for heavy-ion physics. The Forward Detector (FD) will be part of the ALICE 3 covering forward pseudorapidity 4 < |eta| < 7. FD will provide an interaction trigger, beam luminosity, initial vertex position, and a forward multiplicity. Its design should allow for smooth operations...
Go to contribution page -
Cheng-Wei Shih (National Central University (TW))
First results from the PHENIX experiment on the fraction of $J/\psi$ mesons at midrapidity region ($\mid \eta \mid <$ 0.35 ) coming from $B$-meson decay ($F_{B{\rightarrow}J/\psi}$) in $p$+$p$ collisions at $\sqrt{s}=$~200~GeV at RHIC will be presented. The measurement is performed using the central silicon vertex detector, which provides precise tracking and distance-of-closest-approach...
Go to contribution page -
Tom Reichert
Heavy-ion collisions in the energy regime of $\sqrt{s_\mathrm{NN}}=$ 2 - 20 GeV, are relevant for the study of dense baryonic matter and the hunt for the critical end point of QCD. In this energy regime the well established hybrids of single-fluid hydrodynamics coupled to transport afterburners are reaching their limitation due to long interpenetration times and an intricate time...
Go to contribution page -
Adrian Rodriguez
The CBM experiment at the future FAIR facility is a multipurpose forward spectrometer designed to operate at high interaction rates of up to 10 MHz, implementing a triggerless, free-streaming readout system. CBM aims to study the properties of strongly interacting matter at high baryon net density, where phenomena such as a first-order phase transition from hadronic to partonic matter and a...
Go to contribution page -
Dr Anar Rustamov (GSI Helmholtzzentrum für Schwerionenforschung GmbH), Prof. Joachim Stroth (Goethe-University and GSI), Marvin Nabroth
Event-by-event fluctuations in the number of different particle species produced in high-energy nuclear collisions encode essential information about the phase structure of the matter created in such collisions. In this contribution, we present a novel fuzzy-logic-based approach for reconstructing arbitrary-order moments of multiplicity distributions [1]. The proposed method provides a robust...
Go to contribution page -
Pol-Bernard GOSSIAUX
Accurate modeling and understanding of quarkonium production in AA collisions requires a formalism that preserves the quantum properties of a microscopic $Q\bar{Q}$ systems while treating the interaction of such pairs with the QGP. The open quantum system approach has recently emerged as one of the most fruitful schemes to meet such requirements. However, the quantum master equations obtained...
Go to contribution page -
Tanmay Pani
Jets originating from hard-scattered partons from the early stages of heavy-ion collisions travel through the Quark Gluon Plasma (QGP) and are modified or quenched relative to a p+p collision baseline. Moments of the jet’s transverse momentum, $p_{\text{T}}$, profile in the $ \eta - \varphi $ plane relative to the jet axis, called generalized jet angularities $\lambda_\alpha^\kappa$, are an...
Go to contribution page -
Zbigniew Drogosz (Jagiellonian University)
We introduce generalized tensor forms of thermodynamic relations used in relativistic perfect spin hydrodynamics. They are valid in the cases of Boltzmann and Fermi-Dirac statistics and allow for consistent treatment of spin degrees of freedom, also for large values of the spin polarization tensor $\omega_{\mu \nu}$ and for spin tensors $S^{\lambda, \mu \nu}$ of a form motivated by kinetic...
Go to contribution page -
Pavish Subramani
The Compressed Baryonic Matter (CBM) experiment is an upcoming fixed target experiment being built at the Facility for Anti-proton and Ion Research (FAIR).
Go to contribution page
The CBM experiment is designed to characterize the QCD medium at high net baryon densities and moderate temperatures.
Di-electrons interact electromagnetically and are unaffected by strong medium effects.
Hence, they are used as a... -
João Martins da Silva (LIP - Lisboa / ULisboa - IST)
The states of matter produced in the early stage of heavy ion collisions can be highly anisotropic. If such a feature is sufficiently pronounced, one should expect the final particle distribution inside jets to reflect it in the form of non-trivial angle correlations. In this talk, we discuss a first step in exploring such correlations by studying how a $q\bar q$ state branching from an...
Go to contribution page -
ROBIN Törnkvist (Universidade de Santiago de Compostela - IGFAE)
In this talk, we demonstrate that in smaller systems, such as proton–proton and peripheral ion–ion collisions, microscopic models for final state interactions, can produce anisotropies where the elliptic flow is negative — that is, the momentum is largest along the major axis, contrary to hydrodynamic predictions [1].
We present results from two distinct microscopic models: one based on...
Go to contribution page -
Peter Stratmann (Universität Münster (DE))
Outgoing high-$p_{\rm T}$ partons produced from hard scatterings early in high-energy collisions lead to the creation of jets. Photons are produced copiously in these interactions - directly emitted by the quarks as prompt photons, or through the decay of instable particles. They are valuable probes to study jet fragmentation and nuclear parton distribution functions (nPDF).
Angular...
Go to contribution page -
Christian Bierlich (Lund University (SE))
Developments in phenomenology, such as model variations, advances in color reconnection models, and the pursuit of precision tuning, alongside the growing demand for faster simulations to match the increasing luminosity at the LHC, have driven significant progress in string model-based hadronization simulations in PYTHIA. In this talk, I will present an overview of recent efforts to integrate...
Go to contribution page -
Mr Yiheng Luo (Peking University (CN))
The differences in hadron chemistry observed at e+e- machines versus hadron
Go to contribution page
colliders may indicate that the mechanisms by which partons evolve into visible matter are not universal. In particular, the presence of many other quarks produced in the underlying event may affect the hadronization process. With full particle ID, precision vertexing, and a high rate DAQ, the LHCb experiment is... -
Ezra Lesser (CERN)
The nonperturbative process of hadronization has recently been the subject of intense experimental investigation at the LHC. Since heavy quark production is suppressed at the hadronization scale, heavy-flavour hadrons offer an insightful probe into this effect, connecting perturbative parton-level calculations with experimental final states. Jets produced in conjunction with heavy hadrons...
Go to contribution page -
Dana Avramescu (University of Jyväskylä)
We study the impact of the glasma initial pre-equilibrium stage of heavy-ion collisions on heavy quarks spectra and correlations. Our main finding is that the effect of glasma on the nuclear modification factor $R_{AA}$ for the heavy quark transverse momentum spectrum is moderate, while $c\overline{c}$ angular correlations are strongly affected by the glasma [1]. Such correlations are relevant...
Go to contribution page -
Valeriya Mykhaylova (Jagiellonian University in Kraków & University of Wrocław)
We investigate the evolution of charm quarks in hot QCD matter within the well-grounded quasiparticle approach [1]. The quark-gluon plasma (QGP) is composed of the quasiparticle excitations with dynamically generated masses that are linked to the lattice QCD equation of state.
Utilizing the kinetic rate equation, we study the thermal production of charm quark pairs $(c\bar{c})$ in hot QCD...
Go to contribution page -
Salvatore Plumari, Vincenzo Greco
Measurements of heavy baryon production in pp, pA and AA collisions from RHIC to top LHC energies have recently attracted more and more attention, currently representing a challenge for the heavy-quark hadronization theoretical understanding.
Go to contribution page
An hybrid coalescence plus fragmentation approach has been able to correctly predict the large baryon over meson ratio $\Lambda_c/D^0\sim O(1)$... -
Aritra Bandyopadhyay
We evaluate the heavy quark momentum diffusion coefficients in a hot magnetized medium for the most general scenario of any arbitrary values of the external magnetic field. We choose to work with the systematic way of incorporating the effect of the magnetic field, by using the effective gluon and quark propagators, generalized for a hot and magnetized medium. To get gauge independent analytic...
Go to contribution page -
Jean Du Plessis
To date, holographic calculations have provided separate descriptions for the rates of energy loss for either ultrarelativistic massless quarks and gluons or infinitely massive quarks in strongly coupled N=4 SYM plasma. We present a unified description of heavy quark energy loss by combining the limits of zero mass $M \to 0$ and infinite mass $M \rightarrow \infty$ in such a way that ensures...
Go to contribution page -
Tomas Mari Surkau (CPHT - Ecole Polytechnique, IP Paris, CNRS)
We will present results for the heavy quark, i.e. top-right, corner of the Columbia plot. They were derived using a 1-loop Polyakov loop potential in the center-symmetric Landau gauge, supplemented by a minimal (1 parameter), phenomenological, Curci-Ferrari extension to the Faddeev-Popov terms, which we employ to account for the effect of Gribov copies. This model has been validated in the...
Go to contribution page -
Laszlo Gyulai (HUN-REN Wigner Research Centre for Physics (HU))
We use open charm production to estimate how far we can see back in time in high-energy hadron-hadron collisions. We analyze the transverse momentum distributions of the identified D mesons from pp, p–-Pb and A–-A collisions at the ALICE and STAR experiments covering the energy range from $\sqrt{s_{\rm NN}}$ = 200 GeV up to 7 TeV. While the low-momentum part of the spectra can be associated...
Go to contribution page -
Bruno Scheihing (KITP, University of California, Santa Barbara), Krishna Rajagopal (Massachusetts Inst. of Technology (US)), Rachel Steinhorst (Massachusetts Institute of Technology)
The early far-from equilibrium dynamics of the pre-hydrodynamic quark-gluon plasma (QGP) formed in heavy ion collisions can be characterized by distinct stages, during each of which the system loses some memory of its initial condition, until only the hydrodynamic modes remain. In QCD kinetic theory, this attractor behavior has been described in terms of self-similar scaling solutions for the...
Go to contribution page -
Chiara Le Roux
This work aims to shed light on the puzzle of small systems constituted by the absence of jet quenching but the
Go to contribution page
presence of a non-zero v$_2$ of high pt particles. This is done using the JEWEL event generator with a brick-like medium
definition mimicking a small collision system. We concentrate on two observables: R$_AA$, which measures the energy loss of jets, and v$_2$ of high p$_\perp$... -
Dr Leonardo Tinti (Uniwersytet Jana Kochanowskiego w Kielcach)
Relativistic kinetic theory has been used to describe many aspects of relativistic heavy-ion collisions. To provide smooth initial condition for the hydrodynamic phase from the early stages. To take into account the interaction in the final stage of the evolution, before the chemical and kinetic freeze-out, or directly to replace hydrodynamics in the description of the strongly interacting...
Go to contribution page -
Uri Sharell (University of Oxford)
To understand the surprising accuracy of hydrodynamic predictions for the quark-gluon plasma in heavy-ion collisions, many have turned to studying attractor solutions in the underlying kinetic theory. Aside from experimentally motivated assumptions such as Bjorken flow, ignoring the presence of spatial gradients has often been helpful to facilitate theoretical calculations. We challenge this...
Go to contribution page -
Wojciech Florkowski (Jagiellonian University)
A hybrid framework of spin hydrodynamics is proposed that combines the results of kinetic theory for particles with spin 1/2 with the Israel-Stewart method of introducing non-equilibrium dynamics. The framework of kinetic theory is used to define the perfect-fluid description that conserves baryon number, energy, linear momentum and spin part of angular momentum. This leads to the entropy...
Go to contribution page -
Susanne Glassel
Under the extreme conditions of relativistic heavy-ion-collisions hypernuclei are created with large abundancies. Hypernuclei measurements provide insights into the equation-of-state of hadronic matter at high net-baryon densities, as well as into hyperon-nucleon and hyperon-hyperon-interactions. The Compressed Baryonic Matter (CBM) experiment at the future Facility for Anti-Proton and Ion...
Go to contribution page -
Sourav Kundu (CERN)
The anisotropic flow of identified hadrons is sensitive to the early dynamics of heavy-ion collisions and to the equation of state (EoS) of the medium. In particular, strange and (multi-)strange baryons have small hadronic cross-sections, thus being clean probes of the early stages of the collision system evolution. As such, they constitute the perfect observable to test the hydrodynamic...
Go to contribution page -
Chenyan Li (Shandong University (CN))
The observation of hyperon polarization along beam direction ($P_z$) in nucleus-nucleus collisions has opened a new way to study the complex vortical structures of the QGP. With the high-statistics data collected by the CMS experiment, we present the first $P_z$ results for $\Lambda$ and $\bar{\Lambda}$ particles in pPb collision at $\sqrt{s_{NN}}= 8.16$ TeV over a wide transverse momentum...
Go to contribution page -
Annamaria Chiarini
After formulating the angular momentum conservation in a covariant form, we consider the equations of spin hydrodynamics in the background of an uncharged fluid in global equilibrium with a non-vanishing thermal vorticity.
Go to contribution page
Assuming that the spin degrees of freedom are not in equilibrium, we derive relaxation-type equations for the components of the spin potential.
These equations generalize... -
Cedric John Norbert Riedel
Inhomogenous phases or MOAT regimes of QCD matter could emerge at non-vanishing density, as demonstrated recently by calculations using functional methods. In this work, we investigate the stability of such phases within a low-energy effective theory, where the free energy F was calculated as the spatial derivative expansion of an order parameter Φ out of the Landau- Ginsburg-theory. We...
Go to contribution page -
Jan Wissmann (Universität Münster)
In this work, we analyze the impact of open-heavy-flavor-production data in proton-lead collisions on the nCTEQ nuclear PDFs. For the theoretical predictions of this process, we use an existing next-to-leading-order calculation in a general-mass variable-flavor-number scheme (GM-VFNS), which, as a pQCD alternative, we compare to the data-driven approach for open heavy-flavor production used in...
Go to contribution page -
Zhengxi Yan
The nucleon density distribution within colliding nuclei is typically modeled using the two-parameter Woods-Saxon (WS) distribution. This conventional approach overlooks the fine radial structures arising from the quantal shell filling patterns of protons and neutrons. In this study, we incorporate these fine radial variations by utilizing density profiles from Skyrme-Hartree-Fock density...
Go to contribution page -
Nuno Olavo Gonçalves Mendes Madureira (LIP/IST)
Unravelling the hadronization mechanism in Quantum Chromodynamics (QCD) remains challenging due to its non-perturbative nature, often modelled in Monte Carlo event generators (such as PYTHIA and HERWIG) with parameters tuned to experimental data. While jets were originally proposed to circumvent non-perturbative effects and probe QCD at perturbative scales, we show that their substructure can...
Go to contribution page -
Wei-Ping Huang (Central China Normal University)
Quarkonium production can be used to probe the matter formed in ultrarelativistic heavy-ion collisions. However, for theoretical understanding of the experimental results on quarkonium production in heavy-ion collisions it is necessary to know if and which quarkonium states exist above the crossover temperature, $T_c$ and what are the in-medium masses and widths of different quarkonium states....
Go to contribution page -
Kamaljeet Singh (Indian Institute of Technology Indore (IN)), Raghunath Sahoo (Indian Institute of Technology Indore (IN))
We have estimated the induced electric field in quark-gluon plasma (QGP) due to its thermoelectric effects. At present, the relativistic heavy-ion collisions are capable of creating QGP, a locally thermalized medium composed of quarks and gluons.
Go to contribution page
During the space-time evolution of the QGP medium, interesting thermoelectric phenomena occur due to the presence of electrically charged particles... -
Mr Gabriel Rabelo Soares (Unicamp)
Motivated by hydrodynamics of small systems we investigate the conceptual problem of how to match hydrodynamics, a classical deterministic theory, to the 3D structure of the nucleon, information encoded in deeply
Go to contribution pagequantumstuctures such as GPDs and TMDs.
We show that concepts from the Wounded nucleon model can nevertheless be applied to such objects provided one assumes ``instant... -
Zuzana Paulinyova (Pavol Jozef Safarik University (SK))
In this work, we compare two multi-stage approaches for RHIC BES energies that both model the hot and dense part of the medium evolution with fluid dynamics, while have different strategies for the early-stage dynamics and baryon stopping. This work is important in the context of RHIC Beam Energy Scan program and future FAIR experiments, exploring the phase diagram of QCD and locating its...
Go to contribution page -
Jean-Francois Paquet (Vanderbilt University)
There have been recent proposals that the speed of sound of the quark-gluon plasma can be measured from multiplicity and mean transverse momentum ($p_T$) measurements in ultracentral heavy-ion collisions, based on thermodynamics arguments and numerical simulations [1]. The CMS Collaboration has used this approach to extract values of the speed of sound remarkably consistent with lattice QCD...
Go to contribution page -
Zhen Zhang (Central China Normal University CCNU (CN))
The study of heavy-flavour hadrons in small systems, such as proton-proton (pp) collisions, offers insights into quantum chromodynamics (QCD) processes and allows us to deepen our understanding of the heavy-flavour quark parton shower and hadronisation processes. In a complementary approach to charm-tagged jets, measurements of azimuthal correlations between charm hadrons and charged particles...
Go to contribution page -
Samuel Corey (Ohio State University)
The interplay of various $\pi^+ \pi^-$ photoproduction mechanisms creates a rich environment to explore the Entanglement Enabled Spin Interference (EESI) effect in different contexts. The resonance and continuum $\pi^+ \pi^-$ production originate from distinct $\gamma A$ and $\gamma \gamma$ processes offering unique opportunities to investigate production mechanisms and interference...
Go to contribution page -
Maximilian Korwieser (Technische Universitaet Muenchen (DE))
Experimental data on the interaction between vector mesons and nucleons are a crucial input for understanding the pattern of in-medium chiral symmetry restoration (CSR) and dynamically generated excited nucleon states. However, accessing these interactions is hampered by the short lived nature of the vector mesons, making traditional scattering experiments unfeasible. In recent years the ALICE...
Go to contribution page -
Xinbai Li (University of Science and Technology of China)
Relativistic heavy-ion collisions offer a unique environment for exploring quantum interference at an unprecedented femtometer scale through photon-nuclear interactions in photoproduction. In exclusive $\pi^{+}\pi^{-}$ production, the resonance and continuum $\pi^{+}\pi^{-}$ components arise from distinct production mechanisms in the $\gamma {\rm A}$ interaction. The continuum...
Go to contribution page -
Alexandru Manea (Institute of Space Science subsidiary of INFLPR (RO))
Two particle correlations have shown the presence of long-range rapidity correlations in small collision systems. Several other measurements provided insight into the unexpected collective behaviour similar to the one exhibited in heavy-ion collisions. These properties can be explained by several models, which consider a microscopic description like PYTHIA 8 and a macroscopic treatment as...
Go to contribution page -
Dongguk Kim (Sungkyunkwan University (KR))
This study aims to investigate the antishadowing effect in nuclear parton distribution functions (nPDFs) by calculating the nuclear modification factor $R_{pA}$ for dijets produced in proton-proton (pp) and proton-lead (p-Pb) collisions. To achieve this aim, we used Monte Carlo simulations using PYTHIA and PYTHIA+POWHEG event generators. These tools allowed us to apply various nPDF sets to...
Go to contribution page -
Luca Aglietta (Universita e INFN Torino (IT))
Precise measurements of charm-strange hadron production are crucial for validating perturbative QCD calculations based on the factorization approach. In particular, comparing production yields of strange and non-strange charm hadrons is essential for understanding heavy-quark hadronization in hadronic collisions and for constraining models with different quark hadronisation approaches.
Go to contribution page
In... -
Gergely Barnafoldi (Hungarian Academy of Sciences (HU))
The transverse momentum spectra and their multiplicity dependence serve as key tools for extracting parameters to be compared with theoretical models. Over the past decade, the scientific community has extensively studied the possibility of a system analogous to quark-gluon plasma, predicted in heavy nuclei collisions, also existing in collisions involving light nuclei and protons. We have...
Go to contribution page -
Debadatta Behera (Indian Institute of Technology Indore (IN)), Raghunath Sahoo (Indian Institute of Technology Indore (IN))
Quarkonium production in hadronic collisions is a complex process, driven by hard-scale phenomena, such as the creation of quark-antiquark pairs during the initial hard scatterings. Studying the ψ(2S) to J/ψ ratio as a function of charged particle multiplicity provides valuable insights into the mechanisms governing quarkonium formation in high-energy collisions. Since ψ(2S) is an excited...
Go to contribution page -
Mr Sawan Sawan (National Institute of Science Education and Research (NISER) (IN))
The Standard Model describes ordinary hadrons, such as mesons (quark pairs) and baryons (three-quark structures). However, QCD predicts the existence of several exotic yet unseen states. These include two-quark, four-quark, molecular, hybrid states, and glueballs. In particular, the glueball, a unique bound state composed entirely of gluons, is particularly interesting. Lattice QCD...
Go to contribution page -
Mr Jędrzej Kołaś (Warsaw University of Technology)
Relativistic heavy-ion collisions in the few-GeV energy range provide an opportunity to investigate the properties of nuclear matter at high net-baryon densities, similar to the conditions in Neutron Stars (NS) and Neutron Star mergers. In recent decades, significant attention has been given to the presence of hyperons in NS and their influence on the Equation of State (EoS), which describes...
Go to contribution page -
657. Investigation of thermal and freeze-out contributions of vector mesons to the dilepton spectrumJessica Ou Ya Vogel
Virtual photons emitted from heavy-ion collisions preserve essential information about the fireball, where high baryon densities induce significant medium effects on the spectral function of vector mesons.
Go to contribution page
While short-lived $\rho$ mesons predominantly decay within the fireball, radiating thermal dileptons, a substantial fraction of $\omega$ mesons decay outside the fireball due to their... -
Bhagyarathi Sahoo (Indian Institute of Technology Indore (IN)), Raghunath Sahoo (Indian Institute of Technology Indore (IN))
Charmonium production in ultra-relativistic collisions is an essential probe for understanding the deconfined phase of QCD matter. The study of the production mechanism of charmonium states in pp collisions provides an opportunity to constrain both perturbative and non-perturbative aspects of QCD dynamics. In this context, measurement of charmonium polarization provides valuable insights into...
Go to contribution page -
Zhuoheng Yang (Stony Brook University)
Jet substructure has become a powerful tool in analyzing proton-proton collisions at the LHC. However, its implications for lower-energy jets at a collision energy of 200 GeV, as accessible at RHIC, remain largely unexplored. These lower-energy jets are more sensitive to non-perturbative effects such as hadronization and contributions from the underlying event, offering a unique opportunity to...
Go to contribution page -
Martin Rybar (Charles University (CZ))
Jet substructure measurements in heavy-ion collisions offer vital insights into the dynamics of jet quenching within the hot and dense QCD medium generated in these events. In this talk, we present new results from the ATLAS Collaboration on jet suppression and substructure using the Soft-Drop grooming technique in Pb+Pb and $pp$ collisions at $\sqrt{s_{\mathrm{NN}}} = 5.02~\mathrm{TeV}$. The...
Go to contribution page -
Pavel Vana (Charles University (CZ))
Jet triggering is a critical part of all jet physics measurements in LHC Run 3. In this poster, we describe the jet trigger strategy and performance in the ATLAS experiment during LHC run 3. The performance of level 1 (L1) triggers used as seeds for high-level trigger (HLT) will be shown along with typical trigger rates. While performing the underlying event (UE) subtraction at the L1 trigger...
Go to contribution page -
TIm Neidig
We want to study the quantum mechanical formation of bound states now also in three dimension with the full Kadanoff-Baym equations and compare them to purely uncorrelated approaches with and without memory effects. %(Quantum-Kinetic-Master equations).
Go to contribution page
Furthermore, an in-depth examination of the thermodynamics of open systems is warranted, along with a more comprehensive investigation into... -
Rahul Verma (IIT- Indian Institute of Technology (IN)), Rahul Verma (IIT Bombay)
Understanding phase transitions in relativistic heavy-ion collisions provides insights into the properties of strongly interacting matter. Key transitions include the deconfinement phase, marked by fluctuations in conserved quantities, and the chiral phase, characterized by particle ratio fluctuations that indicate chiral symmetry restoration. Kaon isospin fluctuations were studied in Pb–Pb...
Go to contribution page -
Krista Lizbeth Smith (Pusan National University (ROK))
Photon-photon and photon-nucleus interactions in ultraperipheral collisions of nuclei lead to the production of a wide range of particle species, which can be
Go to contribution page
observed with relatively low backgrounds. The particle species produced include heavy quark and anti-quark pairs, dileptons, vector mesons such as J/psi, and potentially exotic hadrons. The unique geometry and instrumentation of the... -
Marton Nagy (Eotvos Lorand University (HU))
PHENIX has measured the centrality dependence of two-pion Bose-Einstein correlation functions in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. The data are well represented by L\'{e}vy-stable source distributions. Three source parameters have been extracted as a function of transverse mass $m_T$ and centrality: the correlation-strength parameter $\lambda$, the L\'{e}vy index of stability...
Go to contribution page -
Paolo Parotto
Net-strangeness fluctuations are tightly related to the chemical composition of strongly interacting systems, and allow the study of the chiral/deconfinement transition of QCD. Thanks to their excellent signal-to-noise ratio, these observables enable a precise charting of the QCD phase diagram in the high-density region.
Go to contribution page
We present mixed baryon-strangeness fluctuations at $\mu_B=0$ up to... -
Mario Ciacco (Politecnico di Torino and INFN Torino (IT))
In preparation for LHC Runs 5 and 6, the ALICE Collaboration has proposed a next-generation heavy-ion experiment, ALICE 3, which will be installed during the LHC Long Shutdown 4. This new experimental apparatus will feature exceptional pointing resolution and excellent Particle Identification (PID). A key component will be a Time-Of-Flight system utilizing silicon sensors, achieving an...
Go to contribution page -
Weronika Stanek-Maslouska (Deutsches Elektronen-Synchrotron (DE))
In ultra-relativistic heavy-ion collisions, copious rates of $\gamma\gamma$ processes are expected through the interaction of the large electromagnetic fields of the heavy nuclei. These can lead to light-by-light scattering via loop diagrams or photon-induced production of particles such as leptons or virtual axion-like particles. In ultra-peripheral collisions (UPCs), characterized by large...
Go to contribution page -
Andrew Gordeev
We perform a phenomenological study of chemical equilibration using viscous hydrodynamic evolution with an equation of state that parameterize gluon-quark chemical equilibrium through fugacities for each quark flavor. We initialize the QCD medium in a gluon-dominated state and account dynamically for chemical equilibration during the hydrodynamic phase through time-dependent fugacities. We...
Go to contribution page -
Carolina Anna Reetz (Heidelberg University (DE))
Hypernuclei are objects composed of nucleons and hyperons. Measuring their properties and production provides insights into the force that binds strange hadrons to ordinary nucleons, which is poorly known. Additionally, measuring hypernuclei production in high-energy hadronic collisions offers a critical test for nucleosynthesis models, such as statistical hadronization and coalescence...
Go to contribution page -
Ana Marin (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
This talk presents a complete overview of ALICE measurements of $\pi^{0}$, $\eta$, and $\omega$ meson production in pp and p--Pb collisions using the Run 2 data, from $\sqrt{s}$ = 900 GeV up to 13 TeV, over an unprecedented transverse momentum range. The ALICE measurements of neutral meson production give constraints on parton distribution functions (PDF) and fragmentation functions (FF), and...
Go to contribution page -
Arun Kumar Yadav (Department of Atomic Energy (IN))
Collision of heavy nuclei at ultra-relativistic energies offer a unique opportunity to study the formation dynamics of light nuclei. Being loosely bound systems via residual strong interactions, their existence in the hot and dense medium, is very unlikely and possess interesting questions on their production mechanism in these energetic collisions. In the present contribution we will describe...
Go to contribution page -
Junyi Han (Central China Normal University)
Measurements of collective flow of light- and hyper-nuclei in heavy-ion collisions at high baryon density regions is important for understanding the hyper-nuclei formation mechanism.
In this talk, we will present the results on collision energy and particle mass dependence of mid-rapidity directed flow $v_1$ of hyper-nuclei ($\Lambda$, $^3_\Lambda$H, $^4_\Lambda$H) and light-nuclei (p, d,...
Go to contribution page -
Adrian Fereydon Nassirpour (Sejong University (KR))
Measurements of high-multiplicity proton-proton (pp) and proton-lead (p-Pb) collisions at the LHC have revealed that small collision systems show the onset of phenomena typical of heavy-ion collisions. Some of these signatures, such as strangeness enhancement and collective flow, suggest that light-flavor hadron production arises from complex mechanisms whose relative contributions evolve...
Go to contribution page -
Upasana Sharma (University of Jammu (IN))
Recent measurements of light-flavour particle production in small collision systems (pp and p-Pb) at LHC energies revealed features such as collective behaviour and strangeness enhancement, typically seen in nucleus-nucleus collisions. These effects seem to be correlated to charged-particle multiplicity, regardless of the collision system. For this reason, it is important to investigate small...
Go to contribution page -
Dr Lin CHEN (Instituto Galego de Fisica de Altas Enerxias - IGFAE)
We present a systematic investigation of lepton pair production through photon-photon fusion processes in heavy-ion collisions. It is demonstrated that the dilepton production at a given impact parameter ($b_\perp$) with a fixed transverse momentum imbalance ($q_\perp$) can be factorized into a unified formula in terms of the Wigner photon distribution of heavy nuclei. We show that this...
Go to contribution page -
Ramni Gupta (University of Jammu (IN))
A two-dimensional intermittency analysis performed for the charged particles produced in ($\eta, \varphi$) phase space during Xe--Xe collisions at $\sqrt{s_{\rm{{NN}}}}$ = 5.44 TeV recorded with the ${\rm ALICE}$ detector at LHC is presented. A well-known characteristic of the critical behaviour of the system undergoing phase transition is that it shows fluctuations of all scales. Local...
Go to contribution page -
Christian Schmidt (Bielefeld University)
We discuss a new numerical method for the determination the QCD critical point from first principle lattice QCD calculations. The analysis exploits the universal scaling of the Lee-Yang edge that has been obtained from lattice QCD calculations of cumulants of the baryon number density at imaginary chemical potentials. Using a multi-point Pade approximation [1] we identify the closest...
Go to contribution page -
Dr Sahil Upadhyaya (Institute of Nuclear Physics Polish Academy of Sciences, Kraków)
The measurement of the Drell-Yan (DY) production at forward rapidity in proton-proton (pp) collisions at the LHC with the upgraded ALICE detector in Run 3 provides a unique tool for probing the PDFs and partonic structure of hadrons and nuclei. There is a lack of a hard and clear probe of nuclear matter at relatively small Bjorken-x (down to 10-5), which could provide information...
Go to contribution page -
Ms Iuliana-Carina Udrea (Technische Universität Darmstadt)
Dileptons are particularly valuable for investigating properties of hot and dense medium created in relativistic heavy-ion collisions. As they do not interact strongly with the medium, they carry undisturbed information about the QCD matter from which they are emitted.
Go to contribution page
By studying low-mass and low-momentum dileptons, we can gain insights into transport
properties and potentially uncover new... -
Kartik Deepak Bhide (University of Freiburg (DE))
Determining the luminosity of collisions delivered by the LHC is the goal of the ATLAS luminosity programme. An accurate luminosity measurement is fundamental for any physics measurement with the ATLAS detector, in PbPb collisions especially for high precision physics measurements, such as the $\gamma\gamma\rightarrow\mu^{+}\mu^{-}$ cross section in ultra-peripheral Pb+Pb collisions. In ATLAS,...
Go to contribution page -
Dániel Kincses (Eötvös Loránd University)
The process of Lévy walk, i.e., movement patterns described by heavy-tailed random walks, play a role in many different phenomena, from chemical and microbiological systems through marine predators to climate change. Recent experiments have suggested that this phenomenon also appears in heavy-ion collisions. However, the theoretical background is not yet well understood. In high-energy...
Go to contribution page -
Yiming Huang (Speaker) (Fudan University)
Unlike the earlier paradigm in physics, recent advancements in machine learning focus on uncovering physical law through data-driven approaches. In this talk, we leverage well-trained feedback neural networks (FNNs), combined with phenomenological models and reliable nuclear mass data from AME2020 and AME2016, to predict atomic masses with exceptional accuracy and extrapolation capabilities,...
Go to contribution page -
Liu Lumeng (Fudan University)
The initial longitudinal structure of QGP is essential for understanding its formation, evolution, and properties in heavy-ion collisions. However, current flow decorrelation methods are limited by non-flow contamination, restricting access to the QGP's full longitudinal profile. By comparing collisions involving nuclei of similar masses but different deformations, we introduce a new approach...
Go to contribution page -
Yash Patley (IIT- Indian Institute of Technology (IN))
This work presents the study of the strange baryon balance function in proton-proton (pp) collisions at $\sqrt{s} = 13.6$ TeV at LHC with ALICE.
Balance functions of strange baryons are sensitive to production and transport of strange quarks and their hadronization to baryons during the evolution of hot QCD matter formed in heavy-ion collisions. They are also sensitive to the diffusion of...
Go to contribution page -
Guangyu Zheng (University of Chinese Academy of Sciences)
The $\phi$ meson is an excellent probe of the partonic phase due to its small hadronic cross-section, making it less influenced by late-stage hadronic interactions compared to other hadrons. In the energy range of the STAR Beam Energy Scan II (BES II), the directed flow ($v_1$) of net-baryons has been suggested as a sensitive probe of the equation of state of hot and dense matter. The $\phi$...
Go to contribution page -
Guangyu Zheng (University of Chinese Academy of Sciences)
The STAR Beam Energy Scan II (BES II) program at RHIC is crucial for exploring the phase structure of strong interactions and understanding the properties of quark-gluon plasma (QGP). Directed flow ($v_{1}$) has been suggested as a sensitive probe of the equation of state of hot and dense matter. The $\phi$ meson, with its mass close to that of the proton but with strange quark content...
Go to contribution page -
Jaeyoon Cho (Inha University (KR))
Measurements of charm-hadron production provide a fundamental test to validate the perturbative quantum chromodynamics (pQCD) calculation.
Go to contribution page
However, in recent years, an enhanced production of charm baryons relative to mesons was observed compared to $\mathrm{e}^{+}\mathrm{e}^{-}$ collisions, challenging the assumption of independent fragmentation adopted in pQCD calculations via the... -
Ondrej Lomicky (Czech Technical University in Prague)
The Quark-Gluon Plasma (QGP) produced in heavy-ion collisions can be studied using hard probes, such as $D^0$ meson-tagged jets created at early stage of the collision. The jet yield and its substructure are modified by interactions with the medium, compared to vacuum propagation. This phenomenon is known as jet quenching.
The generalized angularities $\lambda_{\alpha}^{\kappa}$...
Go to contribution page -
dandan shen (shandong university)
The $J/\psi$ meson, consisting of a charm quark and its antiquark, serves as an exceptional testing ground of Quantum Chromodynamics (QCD). However, our understanding of its underlying production mechanism remains incomplete. One of the principal challenges lies in experimentally disentangling perturbative from non-perturbative process contributions. The recently proposed $J/\psi$-energy...
Go to contribution page -
Gianluca Usai (Universita e INFN, Cagliari (IT))
The high-intensity beams provided by the CERN SPS in a wide energy interval offer a unique opportunity to investigate the region of the QCD phase diagram at high baryochemical potential. The NA60+ experiment, proposed for taking data with heavy-ion collisions at the SPS in the next years, has a strong potential for investigating the QCD phase diagram via measurements of electromagnetic probes...
Go to contribution page -
Yubiao Wang (Central China Normal University CCNU (CN))
A jet is a spray of collimated hadrons originating from the fragmentation of an energetic parton. In heavy-ion collisions, jets traverse the colored medium and lose energy via induced gluon radiation and elastic scattering, which modify jet yields and structure. When the overlap of the colliding nuclei is small, the transverse profile of the quark-gluon plasma (QGP) is expected to become more...
Go to contribution page -
Axel Drees
The extraction of charm quark cross sections at RHIC energies is crucial for understanding heavy quark dynamics in the Quark-Gluon Plasma (QGP) and the underlying mechanisms of charm production. Multiple partonic interactions (MPIs) from simultaneous scatterings within a single collision event, may significantly influence the production of charm quark. Accounting for MPI is essential in...
Go to contribution page -
Dr Renu Bala (University of Jammu (IN))
The production of hadrons containing charm or beauty quarks in proton-proton (pp) collisions mainly happens via initial hard-scattering processes and provides an important test for quantum chromodynamics calculations. In fact, due to their large masses, heavy quarks can only be produced in processes with high-momentum transfer and hence can be ascribed by perturbative QCD calculations. These...
Go to contribution page -
Nicholas Jindal (Ohio State University (US))
Dielectron production can occur in ultra-peripheral heavy ion collisions via the Breit-Wheeler process, in which the linearly polarized photons from the heavy ion fields interact to produce low transverse momentum dielectron pairs. This production is sensitive to the electromagnetic field distributions from the heavily Lorentz-contracted nuclei, which are directly dependent on the charge...
Go to contribution page -
Marvin Hemmer (Goethe University Frankfurt (DE))
The simultaneous description of the elliptic flow and the production rate of direct photons in ultra-relativistic heavy-ion collisions remains a major theoretical challenge, commonly referred to as the “direct-photon puzzle”. To distinguish between the elliptic flow of direct photons and photons originating from hadronic decays, primarily from π0 mesons, a precise measurement of the π0 flow is...
Go to contribution page -
David Gutierrez Menendez
The Silicon Tracking System (STS) in the Compressed Baryonic Matter (CBM) Experiment at FAIR’s SIS100
Go to contribution page
accelerator, aims to precisely track charged particles and determine their momenta. Its 876 double-sided micro-
strip sensors are the means to accomplish this task in the high multiplicity environment of heavy ion collisions
with high spatial, temporal and momentum resolution. A scaled down... -
Su-Jeong Ji (Pusan National University (KR))
In heavy-ion collisions, the Quark-Gluon Plasma (QGP) is created, and anisotropic flow is one of the critical measurements to understand the detailed medium properties of the QGP. The anisotropic flow of light and strange particles scales approximately with the number of constituent quarks. The scaling behavior is interpreted as the collective flow developing in the partonic phase. Resonance...
Go to contribution page -
Tong Fu (Shandong University)
Significant global hyperon polarization has been observed in non-central heavy ion collisions providing evidence of the vorticity of QGP. This effect can serve as a new probe in exploring fluid properties of strongly interacting matter. We present results of $\Lambda$ and $\bar{\Lambda}$ global polarization in Au+Au collisions at $\sqrt{s_{NN}}$=7.7, 9.2, 11.5, 14.6 and 17.3 GeV from RHIC...
Go to contribution page -
Mrs Veronika Prozorova (Czech Technical University in Prague)
Studying heavy-flavor quarks can enhance our understanding of parton interactions with the Quark-Gluon Plasma (QGP). Due to their significant mass, heavy quarks (charm and bottom) are primarily produced during the early stages of high-energy heavy-ion collisions, where hard scatterings dominate, allowing them to experience the entire evolution of the QGP. One approach to investigate...
Go to contribution page -
Zhenjun Xiong (University of Science and Technology of China (CN))
Quarkonia in high-energy proton-proton (pp) collisions are important probes for studying the quantum chromodynamics (QCD) in vacuum. Understanding the production mechanism of J/$\psi$, a bound state of a charm and anti-charm quark, is crucial to constrain both perturbative and non-perturbative aspects of QCD calculations. Different theoretical models have been developed aiming to describe the...
Go to contribution page -
Michal Svoboda (Nuclear Physics Institute, Czech Academy of Sciences)
The STAR Collaboration reports the first measurements of the inclusive distribution of fully-reconstructed jets in peripheral (60-80%) and central (0-10%) Au + Au collisions at $\sqrt{s_{\mathrm{NN}}}$ = 200 GeV at RHIC, using a dataset with an integrated luminosity of 5.2 nb$^{-1}$. The data were recorded in 2014 with an online High Tower trigger which requires at least 4.2 GeV energy...
Go to contribution page -
Dr Biswarup Paul (Department of Atomic Energy (IN)), Deekshit Kumar (Department of Atomic Energy (IN)), Partha Partim Bhaduri (Variable Energy Cyclotron Centre, Bidhannagar, Kolkata-700064, INDIA)
Quarkonium are considered as an important tool to test our understanding of strong interaction as their production in hadronic collisions involve an interplay of both perturbative and non-perturbative aspects. A complete understanding of the production mechanism of quarkonia in elementary proton-proton collisions remains a challenge. None of the theoretical models of quarkonium production has...
Go to contribution page -
Patrik Novotny (Weizmann Institute of Science (IL))
This poster presents measurements of the di-jet momentum balance in heavy-ion collisions, focusing on anti-$k_t$ jets with varying radii ($R=$ 0.2, 0.3, 0.4, 0.5, and 0.6) using the ATLAS detector at the LHC. The analysis uses 1.72 $\mathrm{nb}^{-1}$ of Pb+Pb data collected in 2018 and 260 $\mathrm{pb}^{-1}$ of $pp$ data collected in 2017, both at a center-of-mass energy of...
Go to contribution page -
Jaime Norman (University of Liverpool (GB))
In this talk we present new measurements of semi-inclusive hadron+jet correlations in pp and central Pb-–Pb collisions, using the high-statistics data sample of Run 3. Charged-particle jets recoiling from a high-$p_{\textrm{T}}$ charged hadron trigger are reconstructed with resolution parameters 0.2 and 0.4. We report the distribution of the acoplanarity observable, $\Delta \varphi$, defined...
Go to contribution page -
Nicolas Strangmann (Goethe University Frankfurt (DE))
Following a significant upgrade, the ALICE experiment resumed data-taking in 2022, collecting data at much higher interaction rates with continuous readout for most detectors. While ALICE’s Electromagnetic Calorimeter (EMCal) continues to operate in triggered mode, its photon and jet triggers allow for the full utilization of the LHC’s delivered luminosity. This increase in statistics enables...
Go to contribution page -
Jinhyun Park (Pusan National University (KR))
Recent measurements of charm baryon-to-meson production-yield ratios at the LHC have shown a substantial enhancement of charm-baryon production in pp collisions as compared to electron-positron and electron-proton collisions. This evidence currently could be interpreted as a modification of the charm hadronization mechanism in hadronic collisions, disproving the assumption of universality of...
Go to contribution page -
Andrew Tamis (Yale University)
In proton-proton collisions, hard-scattered partons will undergo perturbative fragmentation and hadronization, resulting in a collimated collection of hadrons that can be measured as a jet. Two- and three-point energy correlators have been shown experimentally in proton-proton collisions to describe both the perturbative and non-perturbative evolution of a jet, with a transition between the...
Go to contribution page -
Jace Tyler
We report the semi-inclusive distribution of fully-reconstructed jets
Go to contribution page
recoiling from a direct photon trigger in p+p and central Au+Au collisions
at √sN N = 200 GeV. This observable provides an incisive probe of the
Quark-Gluon Plasma generated in high-energy nuclear collisions. Direct
photons are measured using the STAR Barrel Electromagnetic Calorime-
ter (BEMC). Jet reconstruction is... -
Muhammad Farhan Taseer, Mr Muhammad Farhan Taseer (Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China)
The directed flow ($v_1$) is a sensitive probe of the initial state conditions in heavy-ion collisions. One key initial condition is the presence of a strong electromagnetic field, which induces charge splitting between particles and antiparticles and has important implications for the QCD phase transition and the properties of the Quark-Gluon Plasma (QGP) [1]. Another crucial aspect of the...
Go to contribution page -
Jakub Ceska
The study of quarkonium production in $p$+$p$ collisions is of great interest in understanding the relative importance of mechanisms that contribute to its formation, which is an outstanding question. The investigation of the soft and hard processes involved in quarkonium formation is key in constraining the theoretical models and helping to differentiate between them.
This poster presents...
Go to contribution page -
Eslam Shokr (University of Zurich (CH)))
Measurements of the anomalous magnetic moment of leptons provide stringent tests of the Standard Model and potential hints of physics beyond the Standard Model. These measurements for electrons and muons are among the most precisely measured quantities in physics. However, due to the short lifetime of the tau lepton, it is impossible to measure its anomalous magnetic moment through traditional...
Go to contribution page -
Yen-Jie Lee (Massachusetts Inst. of Technology (US))
Hard probe measurements in e+e− collisions are vital for comparative studies in proton-proton and heavy-ion environments, offering a clean reference free from hadronic initial state effects. The interest in N-point energy correlation functions (ENC) has been revitalized for studying QCD, due to their distinct resolution of scales that helps in exploring QCD from perturbative to...
Go to contribution page -
Saeahram Yoo (University of California Davis (US))
We present a measurement of $\Upsilon$ polarization in PbPb collisions with the CMS detector. The results are obtained in the helicity and Collins-Sopper frames and compared with the corresponding measurements in pp collisions. Until now, all studies of quarkonium suppression in heavy ion collisions have assumed unpolarized production in the computation of the detection acceptance. The...
Go to contribution page -
Tongzhou Guo (Stony Brook University)
Dileptons, being electromagnetically decoupled from the strongly interacting medium, are key probes of the thermal and chemical evolution of the Quark-Gluon Plasma (QGP) and the hadronic matter. In the intermediate mass range ($m_\phi < m_{ee} < m_{J/\psi}$), they primarily originate from the thermal radiation of the QGP and semi-leptonic decays of heavy flavor mesons. Disentangling these...
Go to contribution page -
Qiang Hu
The second harmonic cosine and sine modulations of the local spin polarization of $\Lambda$($\bar{\Lambda}$) hyperons out-of-plane ($P_{y}$) and in-plane ($P_{z}$), denoted as $P_{2y}$ and $P_{2z}$, respectively, are newly proposed observables for probing spin Hall effect (SHE) in high-density baryonic region. $P_{2y}$ and $P_{2z}$ are measured in Au+Au collisions at $\sqrt{s_{NN}} = $ 7.7,...
Go to contribution page -
ke mi
Femtoscopy is a powerful technique for probing both the emission source and the interaction potential between particle pairs. The key observable in femtoscopy is the two-particle correlation function, which provides crucial insights into the space-time dynamics of the emitting source as well as final-state interaction effects. Among the less explored interactions is the hyperon-hyperon (YY)...
Go to contribution page -
Youssef El Mard (Goethe University Frankfurt (DE))
The production of $\pi^{0}$ and $\eta$ mesons in ultrarelativistic proton-proton (pp) collisions provides insight into the underlying Quantum Chromodynamics (QCD) processes that govern hadronization. Additionally, these measurements serve as an important baseline for the study of direct photons as well as dielectrons, both of which are crucial for understanding the dynamics of heavy-ion...
Go to contribution page -
Xingrui Gou
The observation of hyperon global polarization along the system's angular momentum has revealed the existence of large vorticities in the medium created by heavy-ion collisions.
Go to contribution page
Using the high-statistics data collected by the STAR experiment during the RHIC BES-II program with upgraded detector systems, we present the global polarization measurements for $\Xi^{\pm}$ and $\Omega^{\pm}$... -
Wenhui Feng (Central China Normal University CCNU (CN))
In this poster, we will present the first measurements of inclusive charged-particle jet spectra in various centrality classes in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}} = 5.36$ TeV. In heavy-ion collisions, the measurements of jets traversing the hot medium provide critical insights into the Quark-Gluon plasma, which manifest themselves in jet energy loss and substructure modifications. The...
Go to contribution page -
Moe Isshiki (University of Tsukuba)
Elliptic ($v_2$) and triangular ($v_3$) flow in the forward and backward rapidity regions, are sensitive to the equation of state of hot and dense nuclear matter as well as the initial conditions in heavy-ion collisions. According to hydrodynamic models, the rapidity dependence of $v_2$ and $v_3$ has a strong constraining power on the temperature dependence of specific shear viscosity...
Go to contribution page -
Yuan Zhang (University of Science and Technology of China (CN))
Quarkonium production in high-energy proton-proton (pp) collisions is an important tool for studying perturbative and non-perturbative aspects of quantum chromodynamics (QCD). Charmonia are bound states of charm and anti-charm quarks and their production process can be factorized into two stages: the heavy quark production and the formation of the bound state. The former happens within initial...
Go to contribution page -
Nadine Alice Gruenwald (Heidelberg University (DE))
We report new ALICE measurements of inclusive charged-particle jet suppression and jet azimuthal anisotropy in Pb--Pb collisions. Inclusive charged-particle jet spectra in central Pb--Pb collisions at $\sqrt{s_{\mathrm NN}}$ = 5.02 TeV are measured over a broad kinematic range, including to very low jet $p_{\mathrm{T}}$, with jet resolution parameter up to 0.5, using event-mixing to correct...
Go to contribution page -
Xin Wu (University of Science and Technology of China)
Relativistic heavy-ion collisions generate extremely strong electromagnetic (EM) fields, providing an ideal environment to study the EM excitation of the vacuum. The Breit-Wheeler process, which involves the electron-position pair production via photon-photon interactions, represents the lowest-order decay mode of the QED vacuum excitation. This process was first observed by the STAR...
Go to contribution page -
Hanseo Park (University of Tsukuba (JP))
Due to the large mass of beauty-quarks, their production is well described by perturbative QCD (pQCD) calculations. As such, beauty jets are a powerful tool for constraining these pQCD calculations and for understanding the fragmentation of coloured massive partons. One of the main challenges in measurements of beauty jets is their accurate identification from the sample of inclusively...
Go to contribution page -
Jiaxuan Luo
Lattice QCD predicts a phase transition from hadronic matter to the Quark-Gluon Plasma (QGP) at high temperature and low baryon chemical potential. The QGP can be created in relativistic heavy-ion collisions, where dileptons are produced throughout the entire evolution and do not involve strong interactions. As a result, they carry original information about their emission source, and are...
Go to contribution page -
Subaru Ito (University of Tsukuba (JP))
Measurements of weak bosons, W$^{\pm}$ and Z$^{0}$, are powerful tools to study quantum chromodynamics (QCD).
Go to contribution page
Due to their large masses, they are predominantly produced via quark-antiquark annihilation in the early stage of pp and heavy-ion collisions.
Therefore, their production can be described by the perturbative QCD (pQCD) and is sensitive to the parton distribution function in nucleon... -
Shengquan Tuo (Vanderbilt University (US))
This talk presents a measurement of higher order flow harmonics with order number up to 12 in lead-lead (PbPb) collisions at $\sqrt{s_{_{\mathrm{NN}}}} = 5.02$~TeV, using data collected by the CMS experiment. Higher order flow harmonics probe the initial geometry of heavy ion collisions as well as the viscous damping of flow coefficients during the evolution of the quark-gluon plasma (QGP). By...
Go to contribution page -
Ms Renata Krupczak (Universität Bielefeld)
The observables computed in simulations of heavy ion collisions are known to be highly sensitive to the initial state of the evolution. Despite advances in the modeling, fully understanding this initial state remains a challenge. In this work, we propose a method to relate final observables to the initial state, described as the sum of an average state and a random linear combination of...
Go to contribution page -
Maria Alejandra Calmon Behling (Goethe University Frankfurt (DE))
During the data-taking campaigns Run 1 and Run 2 of the Large Hadron Collider (LHC), the ALICE collaboration recorded a large amount of proton-proton (pp) collisions across a variety of center-of-mass energies ($\sqrt{s\,}$). This extensive dataset is well suited to study the energy dependence of particle production. Deep neural networks (DNNs) provide a powerful regression tool to capture...
Go to contribution page -
Lady Maryann Collazo Sánchez
The Silicon Tracking System (STS) in the upcoming heavy-ion CBM experiment is tailored for an unprecedented 10 MHz beam-target interaction rate. A unique integration strategy was employed to maintain a material budget within 2 - 8\% $X_0$ while ensuring ample granularity, spatial precision, and timing accuracy. The read-out electronics sit external to the sensitive volume, connected to...
Go to contribution page -
Bruno Scheihing (KITP, University of California, Santa Barbara), Krishna Rajagopal (Massachusetts Inst. of Technology (US)), Urs Wiedemann (CERN)
We study the dynamics of a heavy quark propagating through strongly coupled $\mathcal{N}=4$ supersymmetric Yang-Mills (SYM) plasma. Concretely, we calculate the complete momentum broadening probability distribution due to interactions with the plasma. This calculation includes and goes beyond the classic results for the drag coefficient $\eta_D$ and momentum diffusion coefficients $\kappa_T$,...
Go to contribution page -
Lisa Kröger
Recently, it has been shown that investigating the structure of atomic nuclei is essential for correct description of fluctuations imprinted into the initial stage of a heavy-ion collision event. In fact, the examination of the $N$-body density distributions has shown to be crucial for better understanding deeply inelastic scattering (DIS) and nucleus-nucleus collisions [1].
Go to contribution page
Motivated by the... -
Victor Valencia Torres (Centre National de la Recherche Scientifique (FR))
The quark-gluon plasma (QGP) produced in ultrarelativistic heavy-ion collisions exhibits properties of a mostly perfect fluid. Experimentally, this was established by measuring azimuthal anisotropies in the final state, known as elliptic flow and higher order harmonics such as triangular flow. These Fourier harmonic coefficients have been extensively measured using inclusive charged particles...
Go to contribution page -
Deependra Sharma (IIT- Indian Institute of Technology (IN))
Heavy flavour hadrons are key probes for the investigation of the initial stage as well as the evolution of the system created in heavy-ion collisions. In fact, the heavy quarks possess masses larger than the quantum chromodynamics (QCD) scale parameters and therefore are mainly produced in hard scattering processes with large momentum transfer $Q^2$. For the same reason, their production in...
Go to contribution page -
Ming Xiong Liu (Los Alamos National Laboratory)
Previous studies at RHIC and LHC observed that heavy flavor probe yields grow with the charged particle multiplicity of the collision. These measurements brought to the attention the importance of multi-parton interactions (MPI) in a single $p+p$ collision. Collisions with high activity can also produce an environment dense enough to break weak charmonium states, such as $\psi$(2S). The PHENIX...
Go to contribution page -
Joonsuk Bae (Sungkyunkwan University (KR))
The ALICE Collaboration commenced Run 3 with upgrades to the Inner Tracking System (ITS2) and the Time Projection Chamber (TPC), both pivotal for probing rare phenomena with unprecedented precision. The upgraded ITS2 enables higher tracking resolution, while the improvements to the TPC allow for continuous readout, significantly boosting resolution and data acquisition. Using these...
Go to contribution page -
Shingo Sakai (University of Tsukuba (JP))
Recent measurements of the self-normalised yield as a function of charged-particle multiplicity in pp collisions at $\sqrt{s}=$13 TeV showed a faster than linear increase for both light-flavour and heavy-flavour hadrons, which is found to be more pronounced for high
Go to contribution page
$p_{\rm{T}}$ particles. Models accounting for multiparton interactions (MPI) and color-reconnection (CR) effects describe the... -
Banajit Barman
The study of multiplicity-dependent yields ratio of light-flavour particles like kaons, and protons to pions offers valuable insights into mechanisms hadron production. The $K/\pi$ and $p/\pi$ ratios are crucial in understanding how particle production scales with multiplicity across different systems. In particular, these ratios reveal whether strange and baryonic particle production...
Go to contribution page -
Benjamin Kimelman (Vanderbilt University)
Energy-energy correlators and their three point counterpart have recently been of great interest to the heavy ion jet community as they directly provide the virtuality scale and are relatively simple to calculate. Recent measurements of the two point correlator in PbPb collisions compared to pp collisions by CMS show interesting trends, even when accounting for the energy loss causing a shift...
Go to contribution page -
Jussi Auvinen (University of Jyväskylä)
Bayesian statistical analysis is nowadays a well-established method for performing global fits of QCD matter properties and initial conditions to experimental data from ultrarelativistic heavy ion collisions. However, even when surrogate models such as Gaussian process emulators are used to reduce the number of simulations, the computational costs can still remain prohibitively large for...
Go to contribution page -
Justin Edward Frantz
EMCal-based photon and neutral meson measurements are key parts of both the physics and calibration methods at RHIC and the future EIC. With the advent of the Electron Ion Collider, which will involve many diverse calorimeter systems, and the switch to SiPM readouts which has been occuring over the past ~decade, new techniques in calorimeter calibrations are needed. These should address for...
Go to contribution page -
Marco Hofmann
Neutrino transport plays a critical role in the evolution of neutron star mergers and the cooling of neutron stars. In this work, the quark core in a hybrid star is modeled with a three-flavor NJL-type model that allows for color superconductivity ([arXiv:2408.06704][1]). The rich phase structure of dense quark matter heavily influences neutrino transport. We calculate the direct Urca ...
Go to contribution page -
Sarah Louisa Pitz (Goethe Universität Frankfurt am Main)
Neutron stars offer a unique possibility to study matter under extreme conditions. The core of such an object can reach densities up to several $n_0$ which enables the possibility for a transition to quark matter. However the properties of such hybrid stars could be mimicked by dark matter and thus one needs a clear understanding of the properties for each object. To do so we study dark...
Go to contribution page -
Ankita Budhraja (Nikhef)
Energy correlators have come to the forefront for studying high energy particle collisions. Their natural separation of physical effects at different scales have made them very attractive for studying a wide range of phenomena in high energy particle physics. E.g. the most precise measurement of the strong coupling from jet substructure has been obtained using energy correlators. Recently, we...
Go to contribution page -
Dmitry Shemyakin (Weizmann Institute of Science (IL))
In ultraperipheral Pb+Pb collisions, intense electromagnetic fields enable the generation of magnetic monopole pairs via the Schwinger mechanism. Due to their high ionization and unique trajectories in a solenoidal magnetic field, monopoles are expected to leave a large number of clusters in the innermost ATLAS pixel detector without associated reconstructed charged-particle tracks or...
Go to contribution page -
Gyeonghwan Bak (Chonnam National University (KR))
Quarkonia are versatile tools to probe the dynamics of heavy quarks and of bound states at various scales in heavy ion collisions. While their prompt production rate mainly results from interactions between charm quarks and the medium constituents, the significant fraction of charmonia originating from the decay of B hadrons (nonprompt charmonia) offers a proxy for the behavior of beauty...
Go to contribution page -
Robbe Brants
The way a relativistic system approaches fluid dynamical behavior can be understood physically through the signals that will contribute to its linear response to perturbations. What these signals are is captured in the analytic structure of the retarded correlation function. The non-analyticities can be grouped into three types based on their dimension in the complex frequency plane. Using...
Go to contribution page -
Lu-Meng Liu, Dr Chunjian Zhang (Fudan University)
While fluctuations of the QGP initial conditions have been extensively studied in transverse plane, rapidity-dependent fluctuations remain a bit more elusive. In this talk, we present the new measures of fluctuations in the event-wise average transverse momentum, $\langle p_T \rangle$, which reflect event-by-event fluctuations of the size and entropy of the QGP initial source. We predict the...
Go to contribution page -
Cesar Luiz Da Silva (Los Alamos National Laboratory (US))
Exclusive production processes in high-energy hadron collisions can be used to study both the gluonic structure of nucleons and the nature of exotic hadrons produced in these processes. The LHCb experiment is a unique tool for studying central exclusive production at the LHC. Recent central exclusive production measurements from LHCb will be presentend. These include studies of exclusive...
Go to contribution page -
Syed Uzair Ahmed Shah (Jan Kochanowski University (PL))
The study of particle production in heavy ion collisions provides an opportunity to investigate both the hadronic and deconfined phases of strongly interacting matter and the transition between them. By measuring changes in particle yields as a function of energy, one can explore the properties of matter at the phase transition. The NA61/SHINE experiment, a fixed-target project at the SPS...
Go to contribution page -
Catalin-Lucian Ristea (Institute of Space Science subsidiary of INFLPR (RO))
In heavy-ion collisions, the differences in shape between the positive and negative pion transverse momentum spectra at low $p_T$ can be used to study the Coulomb final-state interaction. The charged pions, as the most abundantly produced and lightest species, are the particles most strongly influenced by the Coulomb field generated by the positive net-charge of the stopped participant...
Go to contribution page -
Theo Motta (Justus Leibig University Gießen)
The structure of the QCD phase diagram is a fundamental question in nuclear and particle physics. Recent works suggest the possibility of inhomogeneous phases, where key properties of quark matter such as the chiral condensate or number density adopt periodic spatial patterns. Although progress has been made in studying these phases within QCD-inspired models, direct analysis in full QCD...
Go to contribution page -
Gabriel Soares Rocha
Hybrid numerical models based on relativistic hydrodynamics have successfully described key aspects of the evolution of the hot and dense matter produced in ultra-relativistic heavy-ion collision experiments. At the end of the hydrodynamical stage, the continuous fluid degrees of freedom are translated to the discrete components of a hadron resonance gas described by kinetic theory. This...
Go to contribution page -
Katarzyna Grebieszkow (Warsaw University of Technology (PL))
The NA61/SHINE strong interaction program is based on systematic beam momentum scans (13$A$–150$A$/158$A$ GeV/$c$) involving light and intermediate-mass nuclei, ranging from proton-proton ($p$+$p$) to xenon-lanthanum (Xe+La) collisions. The program's primary scientific goals include the search for the critical point of strongly interacting matter and the investigation of phenomena related to...
Go to contribution page -
Jannis Gebhard
In this work, we perform computations of inclusive jet, and semi-inclusive jet-hadron cross sections for minimum bias oxygen-oxygen collisions at RHIC and LHC collision energies. We compute the no-quenching baseline for the jet nuclear modification factor $R_\mathrm{AA}$ and jet-, and hadron-triggered semi-inclusive nuclear modification factors $I_\mathrm{AA}$. We do this with state-of-the-art...
Go to contribution page -
Dr Debarshi Dey (Indian Institute of Technology Bombay)
Heavy quarks (HQ) are considered to be excellent probes of the hot QCD matter produced in the high-energy heavy-ion collisions. HQ diffusion coefficient is one of the fundamental transport properties of the hot QCD matter. In this work, we have calculated the HQ momentum ($\kappa$) as well as spatial ($D_s$) diffusion coefficients in an ambient background weak magnetic field via evaluating the...
Go to contribution page -
Peter Lowdon (Goethe University Frankfurt)
Determining the type of excitations that can exist in a thermal medium is key to understanding how hadronic matter behaves at extreme temperatures. Here I report on a recent approach which utilises the non-perturbative constraints imposed by causality. By analysing finite-temperature lattice QCD data for spatial correlators of pseudo-scalar mesons comprised of light quarks, we find evidence...
Go to contribution page -
Diana Rosales Herrera (Autonomous University of Puebla (MX))
The $p_T$-spectrum of the charged particles produced can be described through the fragmentation of color strings by assuming the Schwinger mechanism with heavy-tailed distributions describing the string tension fluctuations. In particular, we discuss the string tension fluctuations described by the $q$-Gaussian distribution and the one derived for the QCD-based Hagedorn function. As a result...
Go to contribution page -
Bjoern Schenke (Brookhaven National Lab)
We present new opportunities to explore the structure of light nuclei leveraging the ability of future facilities to perform collisions with polarized deuterons and other light ions. First, we study diffractive vector meson production at small-x in the collision of electrons and polarized deuterons as anticipated at the Electron Ion Collider. We consider the polarization dependence of the...
Go to contribution page -
David Blaschke (Uniwersytet Wrocławski)
We discuss medium effects on light cluster production in the QCD phase diagram
Go to contribution page
by relating Mott transition lines to those for chemical freeze-out.
In heavy-ion collisions at highest energies provided by the LHC, light cluster abundances should follow the statistical model because of low baryon densities. Chemical freeze-out in this domain is correlated with the QCD crossover transition.... -
Dr Fu-Peng Li (Central China Normal University)
The equation of state (EoS) at finite baryon chemical potential remains an elusive target for direct lattice QCD calculations, constituting a highly challenging topic. To address this issue, we have developed a novel Deep-learning quasi-parton model, which is constructed using three deep neural networks, to capture the fundamental properties of hot and dense QCD matter. Each neural network...
Go to contribution page -
João Paulo Picchetti
We perform a systematic study of nuclear structure parameters and their effects on (actual and potential) heavy-ion collision observables, using the Trento model of initial conditions. From a sensitivity analysis we determine which measurements and what precision are necessary for extracting particular properties such as quadrupole, octupole, and hexadecupole deformation parameters, as well...
Go to contribution page -
Maowu Nie (Shandong University (CN))
In heavy-ion collisions, azimuthal anisotropy of the final state clearly reflects the initial geometric configuration. Recent studies have shown that the anisotropic flow $v_n$ values are enhanced by nuclear deformation parameter $\beta_n$, especially in ultra-central collisions. In mid-central collisions, the $v_n$ values are also influenced by half-height radius $R_0$ and nuclear skin...
Go to contribution page -
Sayan Chatterjee (Indian Institute of Technology Madras (IN))
The interactions between jets and the longitudinal-boosted quark-gluon plasma (QGP) lead to softer particles drifting away from the jet core, where high-$p_\mathrm{T}$ particles remain concentrated, resulting in an intra-jet asymmetry. Investigating this asymmetry, particularly at forward rapidities, offers a novel avenue to probe jet-medium dynamics. Using the PbPb and pp data at...
Go to contribution page -
Dr NIHAR RANJAN Sahoo (Texas A&M University)
We present measurements of azimuthal acoplanarity based on direct photon ($\gamma$) and $\pi^{0}$-triggered semi-inclusive recoil jet distributions in central Au+Au and $p+p$ collisions at $\sqrt{s_{\rm NN}}=200$ GeV, using datasets with integrated luminosity of 3.9 nb$^{-1}$ and 23 pb$^{-1}$, respectively.
Go to contribution page
This observable may probe jet wake effects and Moliere scattering off of... -
Adam Takacs (Heidelberg University), Alexandre Falcão (University of Bergen)
Unfolding, the process of correcting measured data for detector distortions, is essential for comparing collider experiments. As experimental measurements grow increasingly sophisticated, the demand for higher-dimensional unfolding methods has risen. Recently, machine learning (ML)-based unfolding approaches have emerged to address these challenges. In heavy-ion collisions, unfolding becomes...
Go to contribution page -
Dr Rajeev Singh (West University of Timisoara, Romania)
In this talk, I will present our latest research building upon the findings of PLB 850 (2024) 138533, which demonstrated that the entropy current can be derived from first principles using the quantum statistical method, bypassing the need for assumed traditional local thermodynamic forms. Our study uncovers that the local thermodynamic relations, which have been conventionally used as...
Go to contribution page -
Camilla De Angelis (Universita e INFN, Cagliari (IT))
In preparation to the LHC Run3, the LHCb gaseous fixed-target, SMOG, was upgraded to offer higher instantaneous luminosity by up to two orders of magnitude with respect to Run2, new gases, including non-noble ones such
Go to contribution page
as hydrogen, and an increased experimental accuracy. Since 2022, LHCb is working with two independent collision points and as a collider and a fixed-target
experiment... -
Dr Trambak Bhattacharyya (Jan Kochanowski University)
Particles produced in high-energy collisions (e.g. protons on protons) are described by power-law distributions. One such power-law distribution used extensively in the phenomenological studies originates from the nonadditive statistical mechanics proposed by C. Tsallis. In this report, we describe a nonadditive generalization of the conventional Bose-Einstein distribution using a single-mode...
Go to contribution page -
Joakim Nystrand (University of Bergen (NO))
Ultra-peripheral collisions enable a variety of two-photon and photonuclear interactions to be studied. Earlier analyses have mostly focused on exclusive photonuclear vector meson production and on two-photon interactions. This presentation will be on photonuclear interactions where the target nucleus breaks up. The cross sections for these interactions are huge in Pb–Pb collisions at the LHC....
Go to contribution page -
siwei dai (CENTRAL CHINA NORMAL UNIVERSITY)
In high-energy physics, accurately predicting cross sections of reaction processes relies heavily on the parton fragmentation functions (FFs). Conventional methods often require parameterized forms and additional calculations to ensure the FFs conform to the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) evolution equations, which can be cumbersome and may not fully capture the complexity...
Go to contribution page -
Mai Takamura (Nara Women's University (JP))
Much has been learned about the quark gluon plasma (QGP) produced in relativistic heavy-ion collisions, but one of the most challenging issues that still needs to be addressed is that it reaches thermal equilibrium much earlier than theoretically expected. Color glass condensation (CGC) is a strong candidate for the mechanism by which this occurs, but experimental verification has not yet been...
Go to contribution page -
Dario Alberto Ramirez Zaldivar
The Compressed Baryonic Matter (CBM) experiment is one of the experimental pillars at the Facility for Antiproton and Ion Research (FAIR).
Go to contribution page
The Silicon Tracking System (STS) is the central detector for track reconstruction and momentum measurement. It is designed to measure heavy ion collisions at interaction rates up to $10~MHz$. It comprises approximately 900 double-sided silicon strip... -
Emma Charlotte Ege (Goethe University Frankfurt (DE))
Correlated electron-positron pairs (dielectrons) present a unique probe to study the properties of the medium created in relativistic heavy-ion collisions. They are produced in all stages of the collision and leave the system without loss of information as they do not interact strongly with the medium. However, at LHC energies, the thermal dielectrons emitted in the early stages of the...
Go to contribution page -
Prof. Motoi INABA (Tsukuba University of Technology (JP))
A new high-precision forward calorimeter (FoCal) will be installed in the ALICE experiment at the LHC during Long Shutdown 3 for data-taking during LHC Run 4, currently scheduled for 2030-2033. FoCal consists of a Si+W sampling electromagnetic calorimeter with longitudinal and transverse segmentations (FoCal-E) and a conventional Cu+scintillating-fiber hadronic calorimeter (FoCal-H). FoCal has...
Go to contribution page -
Dr Yuanjing Ji (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
Lattice QCD calculations predict that a strongly-coupled QCD matter, the quark-gluon plasma (QGP), can be formed in relativistic heavy-ion collisions at extremely high temperatures and energy densities. Due to their large masses, heavy quarks ($c, b$) are predominantly produced in the initial hard scattering process before the hot QCD medium forms. Their final-state dynamics, therefore, encode...
Go to contribution page -
Pracheta Singha (west university of Timisoara)
We discuss the effect of rotation on the confining and chiral properties of QCD using the linear sigma model coupled to the Polyakov loop in an attempt to resolve discrepancies between the first-principle based numerical and model-based analytical results. Working in a homogeneous approximation, we obtain the phase diagram at finite temperature, baryon density, and angular frequency. We...
Go to contribution page -
Mariia Mitrankova
Measurements of light hadron production play an important role in understanding final state effects in ultrarelativistic nucleus-nucleus collisions. These include the implications of collective flow in both large and small systems as well as the impact of hadronization by recombination on baryon and strangeness enhancement. Studies of the system size dependence of various observables also...
Go to contribution page -
Mate Csanad (Eotvos University, Budapest)
Exploring the space-time extent of particle production is an important goal of heavy-ion physics and efforts have been made in order to understand the underlying physics behind the experimental observations of non-Gaussian source distributions. In experiments, femtoscopic (momentum) correlations are utilized to gain information about the space-time geometry of the particle emitting source. In...
Go to contribution page -
Marvin Kohls
Heavy-ion collisions at energies of a few GeV involve significant baryon stopping in the fireball region, leading to the formation of a baryon-dominated system. This system is characterized by large values of the baryo-chemical potential ($\mu_B$) at chemical freeze-out, as determined through statistical-chemical analysis of hadron yields. However, at these lower energies, the freeze-out...
Go to contribution page -
Mr Fan Si
The main goal of the RHIC Beam Energy Scan (BES) program is to explore the phase structure of strongly interacting nuclear matter and search for the possible QCD critical point (CP) in high-energy nuclear collisions. Over more than a decade, the Beam Energy Scan programs (BES-I and BES-II) at RHIC covered a wide range of collision energy, from $\sqrt{s_{\mathrm{NN}}}=$ 3.0 GeV to 200 GeV...
Go to contribution page -
Bappaditya Mondal
Hyper-order cumulants ($C_n$) of net-proton multiplicity distributions are sensitive observables for studying the QCD phase structure. At small baryonic chemical potential ($\mu_B$), lattice QCD and QCD-based models predict a negative sign for the fifth- and sixth-order cumulants as a signature of quark-hadron transition to be a crossover. At large $\mu_B$, the possibility of a first-order...
Go to contribution page -
Jan Orlinski
The High Acceptance Di-Electron Spectrometer (HADES) [1] installed at the GSI institute in Darmstadt registers products of heavy ion collisions at energies of a few GeV per nucleon. The nuclear matter produced in such collisions reaches extreme densities and temperatures [2, 3, 4], comparable to those found in neutron stars, especially during their mergers [5]. By...
Go to contribution page -
Lida Kalipoliti (LLR, École Polytechnique (FR))
The substructure of bottom quark jets is of substantial interest, both in vacuum and in medium, in terms of understanding radiation emitted from heavy quarks. Unfortunately, the decays of b hadrons, which are typically cascading, obscure the parton level branching, by filling the radiative dead cone. To circumvent this, one may study exclusive b-hadron decays, but one then sacrifices the vast...
Go to contribution page -
Iouri Vassiliev (GSI), Yingjie Zhou
The CBM experiment at FAIR aims to study the properties of dense nuclear matter at the edge of the quark-gluon plasma phase transition. This extreme environment offers a unique opportunity to study hyperon-nucleon and hyperon-hyperon interactions through the production and decay of multi-strange particles and hypernuclei. Understanding these interactions is critical for describing the nuclear...
Go to contribution page -
Zachary Akridge (Indiana University)
The chiral magnetic effect (CME) is a novel transport phenomenon that offers the unique opportunity for experimental observation of transitions between different vacuum topological sectors of QCD. A measurement of the CME signal also helps probe the dynamical magnetic field as well as chiral symmetry restoration, which are key ingredients of the phenomenon. Significant efforts have been made...
Go to contribution page -
XIATONG WU
Investigating the presence of an electromagnetic (EM) field in the
Go to contribution page
quark-gluon plasma (QGP) has gained significant interest in heavy-ion
collision studies. The EM field is a prerequisite for observing the chiral magnetic effect (CME) and could offer insight into the conductivity of QGP. Affecting positively and negatively charged quarks differently, the fleeting EM field contributes to the... -
Kaiyang Wang (University of Science and Technology of China), Shuai Yang (South China Normal University)
In ultra-peripheral collisions (UPCs), coherent J/$\psi$ photoproduction has been recognized as one of the most sensitive probes of the gluon structure in nucleons and nuclei. Recently, STAR published differential measurements on photoproduced J/$\psi$ in ultra-peripheral d+Au and Au+Au collisions at $\sqrt{\mathrm{s_{NN}}}$ = 200 GeV. These results provide important constraints on gluon...
Go to contribution page -
Matthew Caleb Hoppesch (University of Illinois at Urbana-Champaign)
The measurement of dijets in proton-lead collisions at the LHC provides unique possibilities for investigating both nuclear and nucleon initial state effects as a function of parton scattering kinematics. In particular, color fluctuation effects can significantly alter the average interaction strength of the proton, biasing the number of nucleon-nucleon interactions with the Pb nucleus and,...
Go to contribution page -
Subhash Singha
In non-central heavy-ion collisions, the initial strong magnetic (B) field can give rise to a broad range of phenomena, such as the splitting of Landau levels under strong B-fields, which has significant implications in QCD [1]. The neutral ($K^{*0}$) and charged ($K^{*\pm}$) vector mesons have similar masses and isospin; however, their quark magnetic moments differ by a factor of five, making...
Go to contribution page -
Francesca Ercolessi (Universita e INFN, Bologna (IT))
The production of light (anti)nuclei is typically investigated by comparing experimental data with phenomenological models implementing statistical hadronization or coalescence approaches. In this context, the ALICE experiment has performed a broad set of precision measurements in different collision systems (pp, p-Pb and Pb-Pb) since the beginning of its operations. In this contribution, the...
Go to contribution page -
Hadi Mehrabpour (Peking Univresity)
This study is the first investigation of the intricate phenomenon of shape coexistence in atomic nuclei, particularly within ultra-relativistic ion collisions. Recent findings challenge the traditional view of nuclei as fixed configurations, revealing that nuclear deformation—characterized by shape parameters $\beta$ and $\gamma$—can lead to multiple configurations. We distinguish between...
Go to contribution page -
yingjie zhou
Authors: J. Aichelin, C. Blume, E. Bratkovskaya, G. Coci, S. Gläßel, V. Kireyeu, Y. Leung, V. Voronyuk, I. Vassiliev, M. Winn, Y. Zhou
The equation-of-state (EoS) at high baryon density is crucial for understanding the behavior of nuclear matter under extreme conditions. The directed flow of protons and $\Lambda$ baryons has long been proposed as a sensitive observable for probing the...
Go to contribution page -
Stefano Cannito (Universita e INFN Trieste (IT))
In proton-proton (pp) collisions, the ratio of strange to non-strange hadron yields is observed to increase smoothly with the multiplicity of charged particles produced in the event. In high multiplicity pp collisions, such ratios are comparable to those measured in Pb–Pb interactions at similar multiplicities. The microscopic origin of this phenomenon in pp collisions has yet to be...
Go to contribution page -
Georgios Mantzaridis (Technische Universitaet Muenchen (DE)), Raffaele Del Grande (Technische Universitaet Muenchen (DE))
The interaction among nucleons and double-strange $\Xi^-$ baryons is an important ingredient for the equation of state of neutron stars.
Go to contribution page
In classical experimental methods, information on the strangeness S=-2 sector is accessed by measuring the binding energy of a $\Xi^-$ hyperon to a nucleus in so called hypernuclei. However, it is difficult to obtain large statistics with such experiments... -
Ofentse Matlhakola (University of the Witwatersrand)
We exploit a jet substructure observable called the Lund Jet Plane (LJP) to map the momentum and angular orientation of particle emissions from a jet-initiating quark in order to study the jet evolution. This approach is useful for probing the Dead Cone phenomenon, a predicted suppression of soft gluon radiation in a conical region around the forward axis of a radiating massive quark. We...
Go to contribution page -
Mr Suraj Prasad (Indian Institute of Technology Indore (IN)), Neelkamal Mallick (University of Jyväskylä), Raghunath Sahoo (Indian Institute of Technology Indore (IN)), Dr Gergely Gabor Barnafoldi (HUN-REN Wigner Research Centre for Physics (HU))
Azimuthal anisotropy quantified as anisotropic flow coefficients are important observables that can provide key information about the collectivity of the system formed during heavy-ion collisions. The anisotropic flow coefficients are sensitive to both the geometrical configuration of the collision overlap region and the transport properties of the medium. Recently, hints of collectivity in...
Go to contribution page -
Jyotirmoy Roy
Heavy quark energy loss in a strongly coupled $N=4SU(N_c)$ has been studied using AdS/CFT correspondence, which shows hydrodynamic excitations to be the primary modes. Similar results are lacking for strongly coupled QCD plasma due to absence of dual description. Motivated by the AdS/CFT result, we construct an effective field theory of heavy quark in a hydrodynamic medium which aims to...
Go to contribution page -
Mr Behruz Kardan (IKF, Uni-Frankfurt)
Heavy-ion collisions in the few-GeV energy range allow the creation of strongly interacting matter under extreme net-baryon densities, conditions which are comparable to the ones in neutron star mergers. The precise investigation of the Equation-of-State (EoS) of this kind of matter is therefore of high relevance for the understanding of neutron stars.
Go to contribution page
In this contribution, we present new... -
Guoping Wang
In heavy-ion collisions, the elliptic flow ($v_{2}$) represents the second harmonic coefficient in the Fourier expansion of the azimuthal distribution relative to the reaction plane. It serves as a sensitive indicator of the interaction strength among the system’s constituents and offers a valuable means to explore its degrees of freedom.
In this poster, we will present $v_{2}$...
Go to contribution page -
Aswathy Menon K R (Indian Institute of Technology Indore (IN)), Mr Suraj Prasad (Indian Institute of Technology Indore (IN))
One of the major motivations for the planned p--O and O--O collisions at the LHC is to explore the possibilities of small system collectivity. Such transverse collective expansion results in the appearance of long-range azimuthal correlation and is quantified via the coefficients, $v_{\rm n}$, of Fourier expansion of the azimuthal momentum distribution of the final-state particles. These flow...
Go to contribution page -
Dr Yuanjing Ji (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE) & Lawrence Berkeley National Laboratory)
Hypernuclei are bound states of nuclei with one or more hyperons. Hypertriton $\rm {}^{3}_{\Lambda}H$ ($np\Lambda$) and $\rm {}^{4}_{\Lambda}H$ ($nnp\Lambda$) are the two simplest observed hypernuclei. The $\rm {}^{3}_{\Lambda}H$ is the loosest bound hypernucleus, with a $\Lambda$ binding energy of $\sim$0.1 MeV, while the $\rm {}^{4}_{\Lambda}H$ is more strongly bound, with a $\Lambda$...
Go to contribution page -
Mr Suraj Prasad (Indian Institute of Technology Indore (IN)), Raghunath Sahoo (Indian Institute of Technology Indore (IN))
The event classifiers based on particle multiplicity or event topologies such as transverse spherocity and underlying events have been extensively used at ALICE to probe the origin of the observed Quark-Gluon Plasma (QGP) like phenomena in high multiplicity proton-proton (pp) collisions. The drawback of using the multiplicity-based classifiers is that selecting high multiplicity events may...
Go to contribution page -
Yixuan Jin (Central China Normal University)
The studies of the production of light nuclei, such as deuteron, triton, and helium nuclei in heavy-ion collisions, are essential for understanding the dynamics of nuclear matter under extreme conditions. In addition, the yields of light nuclei and their ratios serve as an effective method for distinguishing between the thermal and coalescence models. The significantly larger datasets from the...
Go to contribution page -
Philipp Kähler (Institut für Kernphysik, Universität Münster)
The Transition Radiation Detector (TRD) is one of the detector
Go to contribution page
components of the CBM expriment at FAIR, currently under construction.
Multi-Wire Proportional Chambers (MWPCs) with sizes of
$99\;\textrm{cm~x~} 99\; \textrm{cm}$ and $57\;\textrm{cm~x~} 57\;\textrm{cm}$ will record particle rates up to $120\;\textrm{kHz cm}^{-2}$: the MWPCs are therefore designed to provide fast signal... -
Emilie Martine Barreau (Centre National de la Recherche Scientifique (FR))
The ALICE experiment changed its data-taking strategy from triggered to continuous detector readout and underwent several detectors upgrades, in order to cope with the LHC Run3 luminosity increase and maximize the amount of data collected. Among the aforementioned upgrades, the installation of the new muon forward tracker (MFT) enriches the study of quarkonium production previously carried out...
Go to contribution page -
Florian Jonas (University of California Berkeley (US))
This talk presents new measurements of prompt photon production in pp and p--Pb collisions by ALICE. We present the first determination of the nuclear modification factor of isolated prompt photon production in p--Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV. Together with a recent analysis at $\sqrt{s_{\rm NN}}$ of 8.16 TeV, this new measurement constrains the low-$x$ structure of matter...
Go to contribution page -
Clemens Werthmann (Ghent University)
Exploiting the first measurements of the same ion species in O+O collisons at RHIC and LHC, we propose an experimentally acessible observable to distinguish whether collective behavior builds up through a hydrodynamic expansion of a strongly interacting QGP or through few rescatterings in a non-equilibrated dilute medium. Our procedure allows to disentangle the effects of the initial state...
Go to contribution page -
Ms Dani Rose J Marattukalam (Indian Institute of Technology Bhilai)
A net baryon density up to 2-6 times the nuclear saturation density and high magnetic fields are expected in the reaction zone of upcoming CBM/NICA experiments. Such densities are also likely in the core of massive neutron stars, possibly with mixed quark-hadron phases. The chiral effective model, based on the principles of chiral symmetry breaking and broken scale invariance, is employed to...
Go to contribution page -
Mr Prasanjit Aich (Indian Institute of Science, Bangalore)
The matrix model for the two-color QCD coupled to a single quark (matrix-QCD$_{2,1}$) exhibits novel features, such as the Pauli-Gursey symmetry. Using variational methods, we numerically investigate matrix-QCD$_{2,1}$ in the limit of ultra-strong Yang-Mills coupling ($g_{YM} =\infty$). The spectrum of the model has superselection sectors labelled by baryon number $B$ and spin $J$. We study...
Go to contribution page -
Pavan Pavan
Heavy quark-antiquark bound states such as $c\bar{c}$ and $b\bar{b}$, serve as essential tools for probing the properties of quark-gluon plasma (QGP). However, its finite momentum behaviour remains largely unexplored, despite its experimental significance. Here, we present a finite-momentum lattice QCD study of quakonia dynamics by observing its finite-momentum spectral function. We obtained...
Go to contribution page -
Roberta Arnaldi (Universita e INFN Torino (IT))
The NA60+ experiment, proposed for data taking in the next years, aims to explore the high baryochemical potential region within the QCD phase diagram, exploiting the high-intensity beams from CERN SPS. Through a beam-energy scan involving Pb-Pb and p-A collisions in the range 6.3 < $\sqrt{s_{NN}}$ < 17.3, NA60+ is ideally positioned to access the high $\mu_B$ region of the QCD phase...
Go to contribution page -
Jaebeom Park
Quarkonia are golden probes for studying the properties of the medium produced in heavy ion collisions. Various measurements for different quarkonium species at RHIC and the LHC indicate that their suppression levels follow the ordering of their binding energies. Additionally, recombination effects are substantial in nucleus-nucleus collisions, particularly charmonium states. However,...
Go to contribution page -
Chiara Oppedisano (INFN Torino (IT)), Luca Quaglia (INFN Torino (IT))
The study of quarkonium production in high-energy proton-proton (pp) collisions allows the investigations of both perturbative and non-perturbative aspects of quantum chromodynamics (QCD). Charmonia states, which are bound states of charm and anti-charm quarks, are produced via a process that can be factorized into two distinct stages: the generation of heavy quarks, followed by the formation...
Go to contribution page -
Matisse De Lescluze
Self similar evolution in time, also known as a nonthermal fixed point, is one of the stages of thermalization in QCD under the assumption of very weak coupling. This arises in models of ultra-relativistic nuclear collisions and cold atomic gases, for the latter this has been experimentally realized. Nonthermal fixed points are characterized by a universal scaling function and power law...
Go to contribution page -
Alexander Soloviev (University of Ljubljana)
We present a detailed numerical and analytical study of the out-of-equilibrium dynamics of Model G, the dynamical universality class relevant to the chiral phase transition. We quench the system from the high temperature, unbroken phase to the broken phase and study the real-time dynamics of the Goldstone modes, i.e. pions. Strikingly, the non-equilibrium evolution of the two-point functions...
Go to contribution page -
Yongcong Xu
Fluctuations of conserved quantities are proposed as a useful observable to study the QCD phase structure including the search for the first-order phase boundary and critical point. Lattice QCD calculations have shown that there is no critical point for $\mu_B \le$ 450 MeV and few phenomenology models calculations have shown that the critical point could be at temperature of $T \sim$ 100 MeV...
Go to contribution page -
Xin Zhang (Institute of Modern Physics, Chinese Academy of Sciences)
Fluctuations of conserved quantities are proposed as a useful observable to study the QCD phase structure including the search for the first-order phase boundary and critical point [1]. Lattice QCD calculations have shown that there is no critical point for baryon chemical potential $\mu_B \le $ 450 MeV and a few phenomenology models calculations have shown that the critical point could be at...
Go to contribution page -
Shin-ei Fujii (Sophia Univ.)
In recent years, analyses using RHIC-BES data have been actively conducted to explore the high baryon number density region in the QCD phase diagram. Meanwhile, even in high-energy collisions, such as RHIC and LHC energies, the presence of high baryon number density matter in the forward rapidity region has been suggested [1]. This implies that, in addition to the analysis of BES data, a...
Go to contribution page -
Aleksas Mazeliauskas, Luyao Fabian Zhou (ITP Heidelberg)
Weakly coupled QCD kinetic theory can well describe the non-equilibrium evolution of the Quark-Gluon Plasma in the early stages of high-energy nuclear collisions. Previous studies in homogeneous and boost invariant systems have shown rapid hydrodynamisation and entropy production during the first $1~\text{fm}/c$. In this work, we relax the assumption of boost invariance and study the early...
Go to contribution page -
Prof. Bin Wu (University of Santiago de Compostela), Iván Cuntín. (University of Santiago de Compostela), Wenyang Qian (University of Santiago de Compostela)
In this work, we study the real-time dynamics of scalar field theory towards thermalization at finite temperature. We first evaluate thermal expectations for observables such as energy density and pressure at finite temperature to extract the property of the system at thermal equilibrium. Specifically, we formulate the scalar fields with both free and $\phi^4$ interaction components and...
Go to contribution page -
Johannes Roth
To bridge the gap between the theory of the QCD phase diagram and the phenomenology of heavy-ion collisions it is important to understand the real-time dynamics of hot and dense QCD matter. One commonly employed low-energy effective theory for the QCD phase structure is the quark-meson model. In this talk, I will show how the real-time dynamics of the quark-meson model can be studied...
Go to contribution page -
Jianqiao Wang (Tsinghua University (CN))
The forward geometry and precision instrumentation of the LHCb spec-
Go to contribution page
trometer provides unique insights into the production of heavy quarks at the LHC. Heavy quark production in pPb collisions are sensitive to the modification of nuclear parton distribution functions, energy loss in the nucleus, and the hadronization process, among other effects. In this talk, precision measurements of open... -
Abhishek Kumar Sharma (Aligarh Muslim University, Aligarh)
The Compressed Baryonic Matter (CBM) experiment, being built at the Facility for Antiproton and Ion Research (FAIR)[1] accelerator complex in Darmstadt, Germany, aims to study the phase diagram of strongly interacting matter in the realm of high net baryon densities and moderate temperatures. The SIS-100 accelerator ring at FAIR will deliver accelerated ions up to beam kinetic energies 29 GeV...
Go to contribution page -
Matthias Kaminski
The AdS/CFT correspondence, or holography, has provided numerous important insights into the behavior of strongly-coupled many-body systems. Crucially, it has provided a testing ground for the construction of new effective field theories, especially those in the low frequency, long wavelength limit known as hydrodynamics. We review the study of strongly-coupled rotating fluids using...
Go to contribution page -
Mr Abhishek Tiwari (Indian Institute of Technology Roorkee)
Utilizing Zubarev's nonequilibrium statistical operator, we derive the second-order expression for the dissipative tensors in relativistic spin hydrodynamics, namely the rotational stress tensor ($\tau_{\mu\nu}$), boost heat vector ($q_\mu$), shear stress tensor ($\pi_{\mu\nu}$), and bulk viscous pressure ($\Pi$). The emergence of the first two terms, $\tau_{\mu\nu}$ and $q_\mu$, is attributed...
Go to contribution page -
Eduardo Grossi
We investigate the dissipation rate of a scalar field in the vicinity of the phase transition and the ordered phase, specifically within the universality class of model A. This dissipation rate holds significant physical relevance, particularly in the context of interpreting effective potentials as inputs for dynamical transport simulations, such as hydrodynamics. To comprehensively understand...
Go to contribution page -
Hosein Gholami (TU Darmstadt)
The Nambu-Jona-Lasinio (NJL) model and specifically its extension to color superconductivity (CSC) is an effective model for investigating dense quark matter. However, the reliability of its results is challenged by cut-off artifacts emerging near cut-off energy scales. In this presentation, I focus on a Renormalization Group (RG) treatment that successfully eliminates these artifacts(arXiv...
Go to contribution page -
Boris Tomasik (Czech Technical University in Prague (CZ))
We argue that the actual production mechanism of deuterons and larger nuclear clusters - coalescence or direct thermal production - can be resolved with the help of elliptic flow. Coalescence is sensitive to the spatial extension of cluster wave function and therefore reflects the change of the size of producing homogeneity region when looking at cluster production in different azimuthal...
Go to contribution page -
Aman Dimri (Stony Brook University (US))
The fourth-order cumulant of quadrangular flow ($\bf{v}_4$), $C_4\{4\}$, exhibits a distinct trend in Pb-Pb collisions at the LHC energy [1]: negative for 0-20% centrality, changes sign and becomes positive around 20-30% centrality, and remains positive throughout the remaining centrality range. This measurement, made over half a decade ago, remains unexplained. We attribute the observed sign...
Go to contribution page -
Saehanseul Oh (Sejong University)
Recent experimental results on two-particle correlations within jets with extremely high multiplicities in pp collisions highlight a strong flow-like correlation among constituents. One of the hypotheses to describe this effect suggests the formation of a hot and dense QCD medium within the jet cone, a phenomenon previously thought to occur exclusively in heavy-ion collisions. One notable...
Go to contribution page -
Michał Marczenko (University of Wrocław)
I discuss the neutron star equation of state. I demonstrate that the restoration of conformal symmetry requires changing the sign of the curvature of the energy per particle. I argue that the curvature of the energy per particle may serve as an approximate order parameter that signifies the onset of strongly coupled conformal matter in the neutron star core. Lastly, I relate the thermodynamic...
Go to contribution page -
Yi Heng Feng
A key physical target of relativistic heavy-ion collision experiments is to understand the phase structure of Quantum Chromodynamics (QCD) and search for the critical endpoint (CEP). The primary experimental approach to locating the CEP is measuring the baryon number fluctuations. In the energy region currently being studied, the baryon number is primarily carried by protons and neutrons. Due...
Go to contribution page -
Seyed Farid Taghavi (Technische Universitaet Muenchen (DE))
Heavy-ion experiments provide a new opportunity to gain a deeper understanding of the structure of nuclei. To achieve this, it is crucial to identify observables under circumstances that are minimally affected by the process that leads to the initial state of heavy-ion collisions from nuclear wave function. In this talk, we demonstrate that when assuming scale invariance, the effect of this...
Go to contribution page -
Dr Chunjian Zhang (Fudan University), Dr Lumeng Liu (Fudan University)
Understanding the many-body properties of ground-state light nuclear shape, is a key question to further study initial conditions and collectivity in high-energy small system collisions at RHIC and the LHC. In this talk, we interface insights from ab initio nuclear structure calculations of $^{16}$O geometry with simulations of high-energy $^{16}$O+$^{16}$O collisions. Bulk observables, such...
Go to contribution page -
Ms Pranjal Verma (Indian Institute of Technology Madras (IN))
The coherently produced vector meson in ultraperipheral collisions (UPCs) at high energies serves as a powerful tool for probing the nuclear gluon density. We are studying the production cross section of $\rho^{0}$ mesons in PbPb UPCs at $\sqrt{s_{NN}}$ = 5.36 TeV, having an integrated luminosity of 1.68 $\mu b^{−1}$, with the CMS detector. The contributions from the continuum and the resonant...
Go to contribution page -
Bhagyarathi Sahoo (Indian Institute of Technology Indore (IN)), Raghunath Sahoo (Indian Institute of Technology Indore (IN))
The recent spin polarization measurement of $\Lambda$-hyperons by the STAR and ALICE Collaboration has created a remarkable interest in the nuclear and high energy physics community to investigate the possible sources for hyperon polarization. It is suggested that in peripheral heavy ion collisions, the initial orbital angular momentum (OAM) manifests the vorticity, which primarily accounts...
Go to contribution page -
Yannik Hoffmann (Universität Bielefeld)
We investigate saturation effects in exclusive vector meson production in deep inelastic scattering (DIS), where we model fluctuations within the target protons as localized color charge hotspots. Using the Color Glass Condensate (CGC) framework and the dipole picture for vector meson production, we examine the coherent and incoherent scattering cross sections' dependencies on momentum...
Go to contribution page -
Souvik Paul (Stony Brook University)
Investigating collective behavior due to the formation of a fluid-like medium in small collision systems has been a significant focus in the field. A tell-tale signature of this would be the medium's response to the initial state in small collision systems, as predicted by fluid-dynamic models.
Recent RHIC studies of small systems have shown a hierarchy of elliptic anisotropy coefficients...
Go to contribution page -
Valeria Zelina Reyna Ortiz (Jan Kochanowski University (PL))
The existence and location of the QCD critical point are objects of both experimental and theoretical studies. The comprehensive data collected by NA61/SHINE during a two-dimensional scan in beam momentum and system size allow for a systematic search for the critical point - a search for a non-monotonic dependence of various correlation and fluctuation observables on collision energy and size...
Go to contribution page -
Jin-Biao Gu (Central China Normal University)
Significant efforts have been made within the heavy-ion collision community to locate the QCD critical endpoint (CEP). Recent lattice QCD studies using imaginary chemical potentials, based on simulations at temperatures above 120 MeV and utilizing Lee-Yang edge singularities in the complex chemical potential plane, suggest that the critical temperature at the CEP, $ T_c^{CEP}$, should be...
Go to contribution page -
Raghunath Sahoo (Indian Institute of Technology Indore (IN))
The studies of heavy flavor (charm or bottom) hadrons in relativistic collisions provide an undisputed testing ground for the theory of strong interactions, quantum chromodynamics (QCD). As the majority of the heavy flavor particles are produced in the initial stages of the heavy-ion collisions, they experience the whole QCD medium evolution. The lightest open charm meson, $D^{0}$, and hidden...
Go to contribution page -
Sijie Zhang
Jet quenching, a key probe for studying the properties of the Quark Gluon Plasma (QGP) formed in heavy-ion collisions, involves modifications to the energy and substructure of high-energy parton showers within the QGP. While the jet quenching phenomenon has been well established in large collision systems, such as Au+Au and Pb+Pb collisions, it is not observed in smaller $p$+A collisions,...
Go to contribution page -
Yang He
Hadron-triggered semi-inclusive recoil jets (h+jet) serve as an effective probe for studying the properties of quark-gluon plasma (QGP), as they experience jet quenching in the QGP. This observable is increasingly used across various systems due to its ability to probe jets over a broad phase space, including low transverse momenta ($p_{\rm T}$) and large radii. Measurements of h+jet in...
Go to contribution page -
Zaiba Mushtaq (Institute of Modern Physics, CAS/University of Chinese Academy of Sciences, Beijing China)
Searching dark portal particle is a hot topic in particle physics frontier. We present a simulation study of an experiment targeted for searching the scalar portal particles and vector portal particles at Huizhou $\eta$ factory. The HIAF high-intensity proton beam and a high event-rate spectrometer are suggested for the experiment aimed for the discovery of new physics. Under the conservative...
Go to contribution page -
Nicolas Tiltmann (CERN, Universität Münster (DE))
The ALICE Experiment will upgrade the innermost three layers of its Inner Tracking System (ITS) during the next LHC Long Shutdown (LS3). It is planned to partially replace the existing conventional setup using individual chips on staves by a novel concept, where wafer-scale sensors are bent to half-cylinders allowing for a tracker with an extraordinarily low material budget of $0.07\%~X/X_0$...
Go to contribution page -
Victor Eugen Ambrus (West University of Timisoara (RO))
The Anderson-Witting relaxation-time approximation (RTA), providing a simple approximation of the Boltzmann collision integral, suffers from the drawback that the single relaxation time $\tau_R$ controls all transport coeffcients (shear and bulk viscosities, diffusivity, higher-order coefficients) [1]. Our Shakhov-like extension systematically introduces extra parameters allowing the...
Go to contribution page -
Dr Cheng Zhang (Central China Normal University)
Shear and bulk viscosities are two key transport coefficients that characterize the fundamental properties of quark-gluon plasma. They quantify the response of the energy-momentum tensor to the shear flow and divergent flow, serving as crucial input parameters for the phenomenological and transport models that interpret experimental data, e.g. the elliptic flow $v_2$.
However,...
Go to contribution page -
Basanta Kumar Nandi (IIT- Indian Institute of Technology (IN))
Two-particle correlation functions of hadrons are sensitive to mechanisms of particle production and transport in elementary particle collisions. The production of quarks is determined by coupling terms of the QCD Lagrangian. These nominally conserves quark flavors in addition to energy, momentum, and electric charge: flavor currents are conserved at the level of quarks and gluons. The...
Go to contribution page -
Bianca Sabiu (Universita e INFN, Bologna (IT))
SiPM (Silicon PhotoMultiplier) sensors are one of the technologies under study for the outer timing layer of ALICE 3, a next-generation multipurpose detector at the LHC which will replace the present ALICE experiment for Run 5 and beyond.
SiPMs are usually coupled to scintillators or Cherenkov radiators. Nonetheless, in recent studies it has been shown that SiPMs can directly detect charged...
Go to contribution page -
William Alexander Horowitz (University of Cape Town (ZA))
We show analytically that the small system corrections to thermodynamics quantities such as pressure and energy density are large, order 30%, for massless free scalar field theory in systems of size and temperature relevant for high-energy nuclear collisions. These analytic expectations are confirmed by quenched lattice QCD calculations of pressure and energy density in an anisotropic system...
Go to contribution page -
Dr Nikhil Hatwar (Indian Institute of Technology - Bombay, Mumbai, India)
Relativistic viscous hydrodynamics has been widely used as an effective theory of the quark-gluon plasma (QGP) stage in high energy collisions. The analytical structure of hydrodynamics consists of a hydrodynamic and a non-hydrodynamic mode. The hydrodynamic mode is associated with an attractor solution and is considered to be the reason for the unreasonable effectiveness of hydrodynamics in...
Go to contribution page -
DaiNeng Liu (Institute of Modern Physics, Fudan University, Shanghai, China)
Understanding the properties of hypernuclei helps to constrain the interaction between hyperon and nucleon, which is known to play an essential role in determining the properties of neutron stars. Experimental measurements have suggested that the hypertriton ($^3_\Lambda \text{H}$), the lightest hypernucleus, exhibits a halo structure with a deuteron core encircled by a $\Lambda$ hyperon at a...
Go to contribution page -
Olaf Massen (Nikhef National institute for subatomic physics (NL))
Theoretical modelling of the neutron and proton ZDC signals in heavy ion collisions is in its infancy due to its unique dynamics of spectator nucleons. Spectators, often forming clusters with varying charge-to-mass ratio, may fail to reach either ZDC and also single proton spectators are challenging to model due to the beamline magnetic fields. Despite these challenges, spectator production...
Go to contribution page -
Konrad Tywoniuk (University of Bergen (NO))
The conventional weakly-coupled description of finite-temperature plasmas lead to the appearance of quasi-particles with thermal masses. By incorporating contributions from both the (chromo)electric scale $gT$ and (chromo)magnetic scale $g^2T$, we establish thermal sum rules of quark spectral function for strongly-coupled QCD that respect Fermi-Dirac statistics as required by quantum...
Go to contribution page -
Mathias Pavely Nødtvedt (NTNU)
In this talk I will discuss the properties of the 2SC-phase of dense quark matter. We formulate the quark-meson diquark model as an effective low energy model of QCD. We then calculate the thermodynamic potential to one loop including quark loops. The phase diagram in the $\mu_B-T$ plane is mapped out. We focus on the speed of sound $c_s$ at $T=0$. $c_s$ has a distinct peak of $c_s\approx0.4$...
Go to contribution page -
Gregory Ottino (Lawrence Berkeley National Laboratory)
sPHENIX, located at the Relativistic Heavy Ion Collider at Brookhaven National Laboratory, is a multipurpose proton and ion collider detector, and a central piece of its physics program is the measurement of open heavy flavor production in both pp and AuAu collision systems. Production of D mesons, both prompt and as cascade decays from B mesons, provide clean probes of the Quark Gluon Plasma....
Go to contribution page -
Ejiro Naomi Umaka (Brookhaven National Laboratory (US)), Ejiro Umaka (Brookhaven National Laboratory)
sPHENIX is a next-generation, state-of-the-art particle detector at the Relativistic Heavy-Ion Collider (RHIC) that has recently completed full commissioning of its subsystems with datasets of 200 GeV Au+Au and p+p collisions during the 2023 and 2024 commissioning runs. From this inaugural dataset, the anisotropic flow (v_n) of charged hadrons has been measured for the first time in the...
Go to contribution page -
Stefan Bathe (Brookhaven National Laboratory (US))
The sPHENIX experiment is a next-generation collider detector at RHIC designed for rare jet and heavy flavor probes of the Quark-Gluon Plasma and polarized proton-proton collisions. sPHENIX includes large-acceptance electromagnetic and hadronic calorimetry, the latter of which for the first time at RHIC, as well as a four-subsystem precision tracking system comprising a MAPS-based silicon...
Go to contribution page -
THOMAS MARSHALL
The sPHENIX experiment operating at RHIC aims to make high precision measurements of jets and heavy flavor observables for a wide selection of nuclear collision systems. Its tracking system is composed primarily of 4 subsystems that work in tandem to reconstruct the path of ionizing radiation through the detector geometry. Starting with the innermost detector and moving radially outward, the...
Go to contribution page -
Mr Jingyu Zhang (Fudan university), Mr Weihu Ma (Fudan university)
The objective of electron identification (eID) in the sPHENIX experiment is to accurately distinguish electrons from quarkonium (such as J/psi and Upsilon) di-electron decay events while effectively suppressing hadron background, thereby enhancing the signal-to-noise ratio crucial for studying Upsilon and J/psi suppression within the Quark-Gluon Plasma. We compare traditional cut-based methods...
Go to contribution page -
Ms Bade Sayki (Los Alamos National Laboratory)
Accurate measurements of $J/\psi$ production are crucial to advancing the heavy flavor program in sPHENIX. During Run 2024, sPHENIX has collected 13pb$^{-1}$ of data, utilizing both tracking and calorimetry detectors with 1.5mrad crossing angle and $|z_{vertex}|<10~$cm in 200GeV $p+p$ collisions. Experimentally, it remains a challenge to measure $J/\psi$ particles due to the low production...
Go to contribution page -
Dr Ming Xiong Liu (Los Alamos National Laboratory)
We investigate the event multiplicity dependence of heavy-flavor jet production in p+p collisions at RHIC, focusing on the role of multi-parton interactions (MPI). Due to differences in mass and color charge, heavy-flavor jets are expected to fragment differently from jets originating from light partons. While jet quenching, a key signature of the quark-gluon plasma in AA collisions, is...
Go to contribution page -
Xuan Li (Los Alamos National Laboratory)
Heavy-flavor jets produced in high-energy collisions are a unique probe to test the pertubative quantum chromodynamics (pQCD), and are one of the major science portfolios for the new sPHENIX experiment. Searching for charm and bottom jets is one of most challenging measurements in collider experiments due to their rare production rate and extensive backgrounds. The sPHENIX experiment has...
Go to contribution page -
Mr Xudong Yu (Peking University)
sPHENIX is the first new collider detector experiment for heavy-ion physics since the switch on of the LHC and was successfully commissioned during 2023 and 2024. A major feature of sPHENIX is the use of a tracking system capable of streaming readout, enabling the collection of very large, unbiased p+p datasets previously not available at RHIC. Using this ability, sPHENIX recorded over 100...
Go to contribution page -
Hannah Bossi (Massachusetts Inst. of Technology (US))
The sPHENIX experiment is a next-generation collider detector at RHIC designed for rare jet and heavy flavor probes of the Quark-Gluon Plasma. With ever-increasing collision rates producing larger data volumes and the search for rarer physics processes, it is becoming apparent that autonomic decision making can play a key role in tagging physics events of interest to specific groups or...
Go to contribution page -
Emma McLaughlin
The transverse energy in heavy ion collisions is one of the key observables characterizing global properties of the quark-gluon plasma (QGP). The transverse energy per unit pseudorapidity (d$E_T$/d$\eta$) probes the energy carried by the medium along the longitudinal direction, providing essential information related to the initial geometry propagated through subsequent hydrodynamic evolution...
Go to contribution page -
Daniel Lis
The sPHENIX experiment is a fully hermetic jet detector at the Relativistic Heavy Ion Collider, which includes electromagnetic and hadronic calorimetry. Jets formed in the initial parton scattering of p+p and heavy ion collisions are probes for the energy loss mechanisms in the QGP. sPHENIX, with a wide rapidity range of the calorimeter system, |eta| < 1.1, is designed to catch a majority of...
Go to contribution page -
Nikhil Kumar (CUNY)
The sPHENIX experiment is a next-generation collider detector at RHIC designed for rare jet and heavy flavor probes of the Quark-Gluon Plasma. The experiment includes a large-acceptance, granular electromagnetic calorimeter (EMCal) and very high-rate data acquisition plus trigger system. In RHIC Run-24, sPHENIX sampled 107/pb of p+p collision data at 200 GeV using an efficient high-p$_T$...
Go to contribution page -
Skaydi Grossberndt (Graduate Center and Baruch College, CUNY)
The sPHENIX experiment is a state-of-the-art detector at the Relativistic Heavy Ion Collider
Go to contribution page
(RHIC) which represents the first detector with both electromagnetic and hadronic
calorimeters with full azimuthal coverage and wide rapidity acceptance centered at
midrapidity, thus making it well suited to measure jets. This poster presents a study of
calorimeter energy-energy correlator at 0.1 <... -
741. sPHENIX measurement of long-range two-particle correlations in high-multiplicity p+p collisionsYuko Sekiguchi (University of Tokyo (JP))
There is considerable evidence suggesting the existence of QGP droplets even in small collision systems, such as p+p and p+A collisions. Measurements of long-range correlations are important to evaluate the interplay between the role of initial and final state effects. The sPHENIX experiment at RHIC began operations in 2023 and took p+p collision data over a period of five months in 2024. In...
Go to contribution page -
Dylan Neff (Université Paris-Saclay (FR))
The sPHENIX experiment is a next-generation collider detector at RHIC designed for rare jet and heavy flavor probes of polarized p+p collisions. The experiment includes a large-acceptance, granular electromagnetic calorimeter (EMCal) and very high-rate data acquisition plus trigger system. In RHIC Run-24, sPHENIX sampled 107/pb of transversely polarized p+p collision data at 200 GeV using an...
Go to contribution page -
Mr Apurva Narde (University of Illinois Urbana-Champaign)
The sPHENIX experiment is a next-generation collider detector at RHIC designed for rare jet and heavy flavor probes of the Quark-Gluon Plasma. The experiment includes large-acceptance, electromagnetic (EMCal) and hadronic (HCal) calorimeter systems, along with a very high-rate data acquisition plus trigger system. In RHIC Run-24, sPHENIX sampled 107/pb of p+p collision data at 200 GeV using an...
Go to contribution page -
Blair Daniel Seidlitz (Columbia University (US))
The sPHENIX experiment is a next-generation collider detector at RHIC designed for rare jet, photon, and heavy flavor probes of the Quark-Gluon Plasma. The experiment includes large-acceptance, hermetic electromagnetic (EMCal) and hadronic (HCal) calorimeter systems, along with a very high-rate data acquisition plus trigger system. In RHIC Run-24, sPHENIX sampled 107/pb of p+p collision data...
Go to contribution page -
Yeonju Go (Brookhaven National Laboratory (US))
Machine learning models have previously been utilized to address the challenge of subtracting combinatorial backgrounds from jets in heavy-ion collisions, with most earlier efforts focusing on supervised regression models. In this talk, we introduce the first self-supervised application of a generative AI model for jet background subtraction. We utilize UVCGAN [1], a Cycle Consistent...
Go to contribution page -
Jaein Hwang
sPHENIX is a second generation RHIC experiment, designed for precise measurements of QGP properties and the nature of the proton spin structure. The Intermediate Si Tracker (INTT) is a two-layer cylindrical tracker using Si strip sensors, with strip size is 78 um x 1.6 cm. The INTT plays a key role for the charged particle tracking and the determination of a collision time. For these purposes,...
Go to contribution page -
Virginia Bailey (Georgia State University)
The sPHENIX detector at the Relativistic Heavy Ion Collider (RHIC) is designed to study the small scale structure of the quark-gluon plasma (QGP) created in heavy ion collisions. Jets, produced in hard scatterings early in the collisions, provide an ideal probe for the full evolution of the QGP. Jets produced back-to-back with photons are an ideal probe of the QGP as the photons do not...
Go to contribution page -
Jaebeom Park
Neutral mesons such as pi0 and eta are excellent probes for studying various aspects of the QGP.
Go to contribution page
Their production at low pT provides insights into hadronization and the collective dynamics of the medium evolution.
On the other hand, at high-pT, the energy loss mechanisms dominate, making these mesons unique probes that span the overall response of the medium.
The sPHENIX calorimeter system... -
David Stewart (Wayne State University)
The sPHENIX experiment is a next-generation collider detector at RHIC designed for rare jet and heavy flavor probes of the Quark-Gluon Plasma. The experiment includes a suite of precision tracking detectors for measurements of jet structure, open heavy flavor, and quarkonia. The tracking system includes a MAPS-based silicon pixel detector, a fast silicon strip detector, a compact time...
Go to contribution page -
Giorgio Torrieri (Unicamp)
We use a potential model to investigate the phenomenology of quarkonium in a thermal rotating medium, where vorticity and spin density are not necessarily in equilibrium. We find that the quarkonium spin density matrix, as well as the binding energy and melting temperature, are sensitive to both the vorticity and the lack of equilibrium between vorticity and spin. This means that quarkonium...
Go to contribution page -
Xin-Li Sheng (INFN Firenze, Italy)
The global spin alignment of $\phi$ meson has been observed by the STAR collaboration in Au+Au collisions at RHIC. However, the measured positive deviation from 1/3 of the spin alignment is orders of magnitude larger than contributions of traditional mechanisms like vorticity or magnetic fields. We proposed that the anisotropy of local strong field fluctuation in meson's rest frame is a new...
Go to contribution page -
Shuo Fang (USTC)
We present our recent development on calculating the interaction corrections for the spin polarization current in the phase space, from collisions and self-energies. We will illustrate the different sources in the framework of quantum kinetic theory, including the intrinsic contribution from Berry curvature, self-energy corrections, side-jump mechanism which comes from the collisions but is...
Go to contribution page -
Nils Sass
In 2017, the STAR collaboration at RHIC unveiled the global polarization of $\Lambda$ hyperons, establishing a connection between angular momentum in heavy-ion collisions and the vorticity of the quark-gluon plasma (QGP). However, a comprehensive understanding of how spin-states - and thus polarization - evolve throughout the hadronic phase presents a significant challenge. This study...
Go to contribution page -
Andrea Tavira Garcia (Université Paris-Saclay (FR))
D-meson production measurements in pp collisions are used to test perturbative quantum chromodynamics (pQCD) calculations. This contribution reports preliminary results of the ALICE Collaboration on the non-prompt $\text{D}^0$ fraction at midrapidity in the transverse-momentum range $p_\text{T} < 24$ GeV/\textit{c}, measured in pp collisions at $\sqrt{s} = 13.6$ TeV, using data from the LHC...
Go to contribution page -
Minjae Kim (Pusan National University (KR)), Minjae Kim (Pusan National University (KR))
Luminosity determination in ALICE is based on the van der Meer (vdM) scan procedure. The vdM scan data in Run 3 are collected through subsystems such as Fast Interaction Trigger (FIT), Zero Degree Calorimeter (ZDC), and Inner Tracking System 2 (ITS2). In the vdM scan, the two beam bunches are moved in opposite directions along the horizontal or vertical axis. The visible cross section is...
Go to contribution page -
Christian Pauly (Wuppertal University)
The Compressed Baryonic Matter experiment (CBM) is a main scientific pillar of FAIR, the Facility for Antiproton and Ion Research, currently being constructed in Darmstadt, Germany. CBM will study the phase diagram of baryonic matter in regions of moderate temperature and large baryonic chemical potential, reaching net baryon densities several times larger than ordinary nuclear matter. Some...
Go to contribution page -
Baochi Fu
We utilize 3+1-d stochastic hydrodynamics to study correlations and fluctuations of baryon charge in high-energy heavy-ion collisions. The baryon charge fluctuations are important observables to probe the QCD phase diagram, while a dynamical description through stochastic hydrodynamics remains challenging due to numerical instabilities and high computation demands. In this work, we employ a...
Go to contribution page -
Mattis Harhoff (Universität Bielefeld)
Stochastic hydrodynamics provides a dynamical framework for the evolution of fluctuations in heavy-ion collisions. Due to the small volume of the system, thermal fluctuations can become sizeable and probe the equation of state of the system, being particularly sensitive to a possible QCD critical endpoint.
Go to contribution page
Our present numerical setup can simulate stochastic non-relativistic hydrodynamics in a... -
Dr Antoni Marcinek (Polish Academy of Sciences (PL))
NA61/SHINE is a multi-purpose, fixed-target hadron spectrometer at the CERN SPS. Its research program includes studies of strong interactions as well as reference measurements for neutrino and cosmic-ray physics. A significant advantage of NA61/SHINE over collider experiments is its extended coverage of phase space available for particle production. This includes the entire projectile...
Go to contribution page -
Roman Nepeivoda (Lund University (SE))
The improved read-out system implemented in ALICE in Run 3 opens the possibility to study photonuclear production of strange particles in a new and unique energy range. The study of strange hadrons across various collision systems and sizes has received renewed interest, particularly in understanding hadronization models. Systematic studies of baryons with varying strangeness content has...
Go to contribution page -
Ms Magdeline Seabi (Nelson Mandela University)
Shock waves in matter produced under extreme conditions drive complex processes like energy transfer, particle acceleration, and plasma instability. Magnetic fields alter the shock wave properties of matter produced in heavy ion collisions and astrophysics, influencing energy density, pressure, and turbulence in these extreme conditions. How magnetic fields impact shock wave evolution in both...
Go to contribution page -
Yehor Bondar (Jan Kochanowski University (PL))
The measurements of Lambda transverse polarization, i.e. the polarization in the direction transverse to the lambda production plane, have a long history. The unexpected observation of significant Lambda hyperon polarization in inclusive p+p and p+A collisions using unpolarized beams triggered theoretical efforts to describe this effect. Numerous models have been proposed to explain the origin...
Go to contribution page -
Soohwan Lee (Korea University (KR))
Multi parton interaction is an essential part of high energy heavy ion collision. In fact, the contribution of double parton scattering (DPS) in nuclear collision in the total charm cross section is significant in LHC energies. By studying double charm correlation, one can extract information about the contribution of DPS production. Also, the correlation from single scattering is used to...
Go to contribution page -
Dr Leszek Krzysztof Kosarzewski (Ohio State University)
Entanglement Enabled Spin Interference (EESI), an example of the Cotler-Wilczek process, was used to measure the structure of nuclei and neutron skins in ultraperipheral (UPC) Au+Au and U+U collisions. Study of the interference in peripheral collisions provides novel information on the impact parameter dependence, the entanglement criteria, and wavefunction decoherence. On one hand, the medium...
Go to contribution page -
Harshit Pandey (The Institute of Mathematical Sciences, Chennai, India)
Heavy quarks are formed in the earliest stages of heavy-ion collisions and hence carry comprehensive information about the entire evolution of the initial non-equilibrium glasma phase to a quark-gluon plasma phase, its subsequent hydrodynamic evolution and hadronization at later stages. One of the quantities of interest to model this evolution and to compare with experimental observations is...
Go to contribution page -
Sadhana Dash (IIT- Indian Institute of Technology (IN))
A new observable, ST , is introduced in terms of the sum of the transverse momentum of charged particles (Sum pT i ) produced in proton proton (p−p) collisions at LHC energies to probe the underlying events (UE). The UE are defined as those aspects of p−p collisions that are not attributed to the primary hard scattering process, but rather to the accompanying interactions of the rest
Go to contribution page
of the... -
Mr Oleksandr Vitiuk (University of Wroclaw (PL))
We present a comprehensive differential study of $\Lambda$ hyperon polarization in Au+Au collisions at low and intermediate energies and different impact parameters, employing the microscopic transport model UrQMD in conjunction with the statistical hadron-resonance gas model. We show that in central collisions the resulting thermal vorticity configuration effectively manifests as the...
Go to contribution page -
Hyunji Lim (Pusan National University (KR))
Short-lived resonances are ideal probes to study the properties of the hadron gas phase created in heavy-ion collisions in the post-hadronization phase. Since the resonance lifetime is comparable to that of the hadron gas phase, their yields are affected by the competing rescattering and regeneration effects. These can be studied experimentally by measuring the yield ratios of resonances to...
Go to contribution page -
Ms Rudrapriya Das (Bose Institute)
The Compressed Baryonic Matter (CBM) experiment at Facility for Antiproton and Ion Research (FAIR), Darmstadt, offers a unique opportunity to study the model-predicted first-order transition from hadronic phase to Quark Gluon Plasma (QGP) phase with high precision by using its exceptionally high collision rates of up to 10 MHz, far surpassing previous experiments.
Go to contribution page
Event-by-event fluctuations... -
Oton Vazquez Doce (INFN e Laboratori Nazionali di Frascati (IT))
The femtoscopy technique, applied to nucleus-nucleus collisions, is a powerful method for studying the properties of particle-emitting sources and providing precise insights into the final-state interactions of the produced hadrons. Through femtoscopy data analysis, key conclusions can be drawn about the existence of bound states, the nature of molecular states, and even the dynamics of...
Go to contribution page -
Zuzanna Anna Chochulska (Warsaw University of Technology (PL))
The angular correlation function is a key tool in the study of hadronization mechanisms. Several effects influence these functions, including quantum statistics, final state interactions, energy and momentum conservation, resonance decays and the quark composition of the interacting particles. This serves as a powerful tool for checking the validity of the theoretical models.
\newlineThis...
Go to contribution page -
Prabhat Ranjan Pujahari (Indian Institute of Technology Madras (IN))
To quantify the properties of hadronic collisions at LHC energies, a precise understanding of the system's spatial and temporal evolution is essential. Femtoscopic correlations provide a powerful tool for measuring the size of the homogeneity region at kinetic freeze-out. In this analysis, we measure femtoscopic correlations within jets produced in proton-proton collisions at $\sqrt{s} = 13$...
Go to contribution page -
Marta Urioni (Universita e INFN Trieste (IT))
In relativistic heavy-ion collisions at the LHC, the quark-gluon plasma (QGP) is produced. The transition is achieved when the system reaches a specific critical temperature ($T_{\mathrm{ch}}$). Lattice QCD calculations indicate that chiral symmetry (CS) restoration occurs around $T_{\mathrm{ch}}$ as well ($\sim 156$ MeV). CS restoration can be investigated using resonances that are parity...
Go to contribution page -
Mr Xingyu Guo (South China Normal Univeristy)
We employ a variational quantum algorithm to study the chiral condensate of 1+1 dimensional SU(2) non-Abelian gauge theory at different temperatures and chemical potentials. Our algorithm is tested both by classical simulations and on real quantum computers. We observed the breaking and restoration of chiral symmetry. Our simulation results are in good agreement with theoretical calculations...
Go to contribution page -
Joey Staa (Lund University (SE))
Heavy-ion collisions at the LHC provide a fascinating testing ground for studying fundamental physical effects in Quantum Chromodynamics (QCD), such as the production of conserved charges at a microscopic level. The goal of this analysis is to study the production mechanisms for strangeness and baryon number, as well as how these mechanisms affect each other, in a QCD-dominated environment....
Go to contribution page -
Youqi Song
Non-perturbative QCD processes have significant effects on jet evolution but remain poorly understood. To study these effects, we measure two novel jet observables, the CollinearDrop (CD) jet mass and the charge correlation ratio ($r_c$), with jets reconstructed in $pp$ collisions at $\sqrt{s} = 200$ GeV at the STAR experiment.
In this talk, we present measurements of the CD jet mass, which...
Go to contribution page -
Isaac Mooney
Studying its path-length dependence is crucial for understanding the mechanisms of parton energy loss in the Quark-Gluon Plasma (QGP) [1]. A path-length asymmetry along impact parameter direction ($x$) exists for hard probes in heavy-ion collisions at finite rapidity, as the QGP bulk is tilted in reaction plane, while the hard scattering profile is not [2]. Previous measurements of $v_1$ (=...
Go to contribution page -
Harri Niemi (University of Jyväskylä), Henry Hirvonen (Vanderbilt University), Jussi Auvinen (University of Jyväskylä), Kari J. Eskola (University of Jyväskylä), Yuuka Kanakubo (RIKEN iTHEMS)
We investigate the interplay between saturation dynamics and fluctuating hotspots on midrapidity flow observables in Pb+Pb collisions at the LHC energies using the new Monte Carlo EKRT (MC-EKRT) initial-state event generator [1,2]. We demonstrate that this type of analysis can be efficiently and accurately performed using pre-trained neural networks [3] to predict flow observables directly...
Go to contribution page -
Leopoldo Abranches De Carvalho (Universidade de Sao Paulo (BR))
Exotic hadrons, such as tetraquarks, fall outside the traditional classification of mesons and baryons. Their production mechanisms remain poorly understood, although statistical, hydrodynamical, and coalescence models have attempted to predict their behavior. The first observation of such a particle was made by the Belle Collaboration in 2003, with the discovery of the X(3872). This study...
Go to contribution page -
Gleb Romanenko (Universita e INFN, Bologna (IT))
Space–time properties of particle-emitting sources created in heavy-ion collisions can be studied with femtoscopic techniques using momentum correlations based on quantum statistics, Coulomb and strong interactions. In this talk, the most recent results of femtoscopic analysis of identical proton pairs in Pb--Pb collisions at $\sqrt{s_{\textrm{NN}}}$ = 5.36 TeV based on data collected by ALICE...
Go to contribution page -
Jia-Lin Pei
The multi-particle cumulants method is a powerful tool for revealing long-range collectivity in small and large colliding systems. The three-particle asymmetric cumulant $ac_{2} \left \{ 3 \right \}$, four-particle symmetric cumulant $sc_{2,3} \left \{4\right\}$, $sc_{2,4} \left \{4\right\}$, and higher order six-particle symmetric cumulant $sc_{2,3,4}\left \{6\right\}$, from the transverse...
Go to contribution page -
Romain Schotter (Stefan Meyer Institute for Subatomic Physics of the Austrian Academy of Sciences (AT))
Recent measurements in pp and p-Pb collisions at the LHC showed that the production of light-flavour hadrons relative to pions increases with the charged particle multiplicity of the event already in small systems. This smooth evolution connects different collision systems almost independently of the collision energy. This extends to the strangeness sector, where the enhanced production of...
Go to contribution page -
812. System size dependence of strange hadron production at $\sqrt{s_{\text{NN}}}$ = 200 GeV at STARXiongxiong Xu
Strangeness production serves as a sensitive probe of the properties of the quark-gluon plasma (QGP). In particular, it is proposed that the $\Omega/\phi$ ratios in different colliding systems may reveal the minimum colliding system size required to produce the QGP. In Au+Au collisions at $\sqrt{s_{\text{NN}}}$ = 200 GeV significant $\Omega$ enhancement over $\phi$ has been observed at...
Go to contribution page -
Meng-Hsiu Kuo
We introduce the ``target jet" in the forward region of the ion in deep inelastic scattering (DIS) events with a jet radius which depends on the DIS kinematics in order to separate the current and target regions in the laboratory frame. We show that target jet substructure and its correlation with the substructure of the leading jet is sensitive to the internal structure of nucleon and ion,...
Go to contribution page -
Justin Mauldin (Frankfurt University)
In this work, we investigate the phase diagram of the (2+1)-dimensional Gross-Neveu-Yukawa (GNY) model under strong magnetic fields at finite temperature and density. Large magnetic fields result in magnetic catalysis, a dimensional reduction of the system and enhancement of the chiral symmetry breaking. Using the functional renormalization group (FRG) in a hydrodynamic approach allows us to...
Go to contribution page -
Max Philip Rauch (University of Bergen (NO))
The ALICE Forward Calorimeter (FoCal) detector upgrade is designed to probe hadronic matter, its gluon density and the parton distribution functions at Bjørken-$x$ in the order of and smaller than 10⁻⁶. Located 7$\,\mathrm{m}$ away from the LHC interaction point, it will cover a pseudo-rapidity range of 3.2 < η < 5.8. The calorimeter will be composed of a 20-layer Si-W sampling electromagnetic...
Go to contribution page -
Petr Balek (AGH University of Krakow (PL))
Track reconstruction in high-multiplicity events, such as heavy-ion collisions at LHC, is a difficult and resource-demanding process. A priori knowledge of the collision vertex position would allow discarding non-viable track seeds, reducing the overall computing requirements for the track reconstruction. Traditionally, the vertex position is estimated only after the track reconstruction,...
Go to contribution page -
Xun Chen (University of South China)
In this talk, I will introduce recent progress in applying machine learning to the holographic QCD phase, the heavy quark potential and mass spectrum. We utilize machine learning to input the equation of state and baryon number susceptibility into the holographic model. Then, using this machine learning-enhanced holographic model, we predict the heavy-quark potential and transport properties...
Go to contribution page -
Thiago Siqueira Domingues
Despite the success of hydrodynamic models in describing relativistic heavy-ion collisions, questions persist about their regime of validity. Non-linear causality conditions provide a clear criterion for assessing the applicability of models. If the evolution of a system violates causality, it cannot reliably represent the underlying relativistic theory. It is now known that state-of-the-art...
Go to contribution page -
Anna Horvath
Kaluza and Klein proposed a theory with a compactified extra dimension, which may appear in high-energy reactions or in the presence of superdense matter. In this work, I show how astrophysical observables will be modified in the presence of extra compactified dimensions.
The interior of a compact star is modeled as a multidimensional interacting degenerate Fermi gas, embedded in a static,...
Go to contribution page -
Mr Leonardo Barreto (Universidade de Sao Paulo (BR), Universität Münster (DE))
We calculate several observables probing jet phenomena in heavy-ion collisions that propagates JEWEL medium-modified parton showers in event-by-event (2+1)D v-USPhydro profiles with $\rm T_RENTo$ initial conditions. The jet-hydro interface incorporates finer features from the hydrodynamic calculation, such as local fluid velocity and the applied equation of state, to realistically simulate...
Go to contribution page -
Prof. Francesco Giacosa (Kielce University)
An excess of charged versus neutral kaons has been recently reported by the NA61/SHINE collaboration. Similar excesses were also present in previous experiments, even if with larger errors. Models for hadron productions in heavy ion collisions systematically underestimate the measured charge-to-neutral kaon ratio. In fact, using well-established models for hadron production, we demonstrate...
Go to contribution page -
Franz Matejcek (Goethe-Universität Frankfurt, Institut für Kernphysik)
The Micro Vertex Detector (MVD) is the first downstream detector of the fixed-target CBM experiment at the future Facility for Antiproton and Ion Research (FAIR). It enables high-precision tracking of low-momentum particles in direct proximity of the target, e.g., the first out of four planar stations is placed only 8 cm downstream the interaction point. Thus, minimizing the material budget...
Go to contribution page -
Luca Jonas Ahrens (Justus Liebig University Gießen), Marten Becker (Justus Liebig University Gießen)
The Compressed Baryonic Matter (CBM) experiment will be installed at the Facility for Antiproton and Ion Research (FAIR). It aims to explore the phase structure of strongly interacting (QCD) matter at large net-baryon densities and moderate temperatures by means of heavy-ion collisions in the energy range $\sqrt{s_{NN}} = 2.9 - 4.9$ GeV. A key observable for the anticipated first order phase...
Go to contribution page -
Shi Yin (Institute for Theoretical Physics, Justus Liebig University Giessen)
Dense QCD matter may exhibit crystalline phases. Their existence is reflected in a moat regime, where mesonic correlations feature spatial modulations. We study the realtime properties of pions at finite temperature and density in QCD in order to elucidate the nature of this regime. We show that the moat regime arises from particle-hole-like excitations near the Fermi surface. This gives rise...
Go to contribution page -
Hyungjun Lee (Sungkyunkwan University (KR))
Jets are collimated bunches of hadrons, and they serve as a useful tool for studying QCD. Jets are generated from the hard scattering processes of quarks and gluons in particle collisions, such as those at the Large Hadron Collider (LHC). These processes can be theoretically described by perturbative QCD (pQCD) and are well-modeled by Monte Carlo simulations such as PYTHIA and...
Go to contribution page -
Michał Szymański (University of Wroclaw)
An investigation of QCD with larger than physical quark masses offers a valuable insight into the physics of deconfinement.
In an effective Polyakov loop model, we show the interplay between the imaginary and real Polyakov loop susceptibility ratio and the baryon number kurtosis. As the quark mass increases, both quantities approach a step-function behaviour. This suggests that the...
Go to contribution page -
Dr Jie Zhao (Fudan University)
Relativistic heavy-ion collisions offer a unique opportunity to probe the deformation of colliding nuclei. The quadrupole deformation parameter ($\beta_2$) has been extensively studied through the flow coefficient $v_2$ in such collisions, as well as through low-energy measurements of the electric quadrupole transition probabilities, B(E2). In contrast, the hexadecapole deformation ($\beta_4$)...
Go to contribution page -
Jan Philipp Klinger (Goethe University Frankfurt)
The nature of the QCD phase transition in the chiral limit presents a challenging problem for lattice QCD. However, its study provides constraints on the phase diagram at the physical point. In this work, we investigate how the order of the chiral phase transition depends on the number of massless quark flavors. To approach the lattice chiral limit, we map out the chiral critical surface that...
Go to contribution page -
Keiwan Jamaly
In this study, the phase structure of the Gross-Neveu-Yukawa model in (2 + 1) dimensions for non-zero µ and non-zero T is explored. This work complements previous works in 1+1 dimensions for finite N and 2+1 dimensional infinite and finite N results (at zero chemical potential). The Functional Renormalization Group is used to calculate the effective potential. Within the Local Potential...
Go to contribution page -
Dr Gergely Gabor Barnafoldi (HUN-REN Wigner Research Centre for Physics (HU))
Recent experimental results present collectivity also in small systems with high-multiplicity. Today these phenomena are not completely understood: it is an important question whether the presence of the QGP is necessary for the observed collectivity or not. Moreover, the connection between the experimental observables and theories is not trivial. In our phenomenological study we introduce the...
Go to contribution page -
Dairon Rodriguez Garces
The J-PARC E16 experiment has the goal to search for signatures of the spontaneously broken chiral symmetry and its (partial) restoration, through the study in-medium modification of the vector mesons, particularly the phi meson, decaying via di-electron channel, with a high intensity 30 GeV proton beam interacting with C and Cu targets at rates up to 10 MHz. For this purpose, the experiment...
Go to contribution page -
40. The SiPM photodetector of the ePIC dual-radiator RICH at the EIC: overview and beam test resultsAnnalisa De Caro (Universita e INFN, Salerno (IT))
The dual-radiator RICH (dRICH) detector of the ePIC experiment at the future Electron-Ion Collider (EIC) will make use of silicon photomultiplier (SiPM) sensors for the detection of the Cherenkov light emitted by particles crossing its radiators. The photodetector will cover $\sim$ 3 m$^{2}$ with 3$\times$3 mm$^{2}$ pixels, for a total of more than 300k readout channels. This will be the first...
Go to contribution page -
Baochi Fu
The global spin alignment of the vector meson has been observed in relativistic heavy ion collisions, but its theoretical origin is still on hot debates. Here we propose to apply the light front framework to explain this phenomenon since the light front form explicitly describes the hadron spin including both the quark spin and the orbital angular momentum. After applying the light front...
Go to contribution page -
Minghua Wei (Anhui University of Science and Technology)
The measurement of the magnetic field created in high-energy heavy-ion collisions is challenging, due to the fact that the magnetic field decays so drastically that in a thermalized quark-gluon plasma the field strength becomes rather weak. By incorporating the weak magnetic effect into the medium, and especially into the production formalism of dileptons from the quark-gluon plasma, the...
Go to contribution page -
666. Thermal dielectron measurements in Au+Au collisions at BES-II energies with the STAR experimentChenliang Jin
Dielectrons, emitted during the evolution of the hot and dense QCD medium created in relativistic heavy-ion collisions, offer an effective probe of the hot medium, as they are non-strongly interacting. The dielectron emission rate is proportional to the medium's electromagnetic spectral function. In the dielectron mass region $M_{ee} < 1$ GeV/$c^{2}$, the spectral function probes the in-medium...
Go to contribution page -
Ziyang Li
The exploration of the properties of quark-gluon plasma (QGP), a distinct state of matter predicted by quantum chromodynamics (QCD), is a primary objective in relativistic heavy-ion collisions. Dielectrons are an ideal probe for understanding the properties of the QGP and its evolution, as they are emitted throughout the whole evolution of the collision and do not interact strongly with the...
Go to contribution page -
Han Gao, Xiang-Yu Wu (McGill University)
The virtual photons emitted during the early stages of relativistic heavy-ion collisions can escape the strongly interacting matter and be measured. This study shows that their polarization can reveal much about the nature of their production mechanism. We present the results of a comprehensive investigation of dilepton polarization generated by a quark-gluon plasma produced in Pb+Pb...
Go to contribution page -
LUCA PASSARELLA
We study the finite temperature equation of state by using an effective lagrangian in which a dilaton field reproduces the breaking of scale symmetry in QCD.
Go to contribution page
We start by extending a previous investigation in the pure gauge sector $SU(3)_c$ [1], where the dynamics of the gluon condensate, expressed in terms of a dilaton lagrangian, is dominated below the critical phase transition temperature... -
ANDREA VIOQUE RODRIGUEZ (Universidad Complutense Madrid)
We analyze the role played by thermal resonances in chiral and $U(1)_A$ transitions. The analysis will be carried out by studying several theoretical approaches based on effective theories. In particular, we will be interested in observables related to chiral symmetry restoration for which the lightest degrees of freedom provide the dominant effect. We will also discuss recent work on...
Go to contribution page -
Sergio Barrera Cabodevila (Instituto Galego de Física de Altas Enerxías - Universidade de Santiago de Compostela)
In this talk, we will present our extended studies on the bottom-up thermalization for a system composed by quarks, antiquarks and gluons. We will begin by performing parametric estimates for three distinct stages prior to hydrodynamization in the weak-coupling/high-energy limit, completing the analysis for pure gluon systems conducted by Baier, Mueller, Schiff, and Son. The predicted scaling...
Go to contribution page -
Fabrizio Murgana (Università degli studi di Catania, Goethe Universitat Frankfurt)
We explore the thermodynamic geometry in the context of the chiral phase transition of Quantum Chromodynamics. In particular the thermodynamic curvature, $R$, provides insights into the system's fluctuations and critical behavior and thus can be considered as an alternative way to approach the study of critical phenomena. Building upon previous studies, we incorporate bosonic fluctuations...
Go to contribution page -
Robert Vertesi (HUN-REN Wigner Research Centre for Physics (HU))
It has been proposed to search for thermal and collective properties arising from parton-fragmentation processes by examining high jet charged-constituent multiplicities ($N_{j,ch}$) in proton-proton (pp) collisions [1]. Initial studies that tested this proposal using the PYTHIA 8 event generator with the Monash tune, incorporating multiparton interactions (MPI) and the MPI-based colour...
Go to contribution page -
Youquan Qi
The characteristics of the system created in collisions of heavy ions can be explored via spatial and temporal parameters obtained using the method of correlation femtoscopy.
Go to contribution page
At low energies, the size of the particle emission region extracted from femtoscopic correlations is affected by the initial system isotopic spin and Coulomb interaction of the correlated particles with the residual... -
Malgorzata Anna Janik (Warsaw University of Technology (PL)), Dr Pritam Chakraborty (PL - Warsaw UT)
The spatiotemporal properties of the system created in heavy-ion collisions, including key information about its size and dynamics, can be studied via femtoscopy. In this talk, a differential study of the system size of Pb–Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.36 TeV with ALICE Run 3 data using correlations in momentum space of charged pion–pion pairs is presented.
Go to contribution page
In this study, the... -
Subhadeep Roy (IIT- Indian Institute of Technology (IN))
The study of the two-particle number correlation function, $R_{\rm 2}$, and the transverse momentum correlation function, $P_{\rm 2}$, has proven to be a crucial toolset to characterise the medium created during heavy-ion collisions. To complement the recent ALICE measurement in minimum-bias pp collisions, this contribution presents the study of multiplicity and transverse spherocity...
Go to contribution page -
Mr Ren Ejima (Hiroshima University (JP))
The spectral functions of chiral partners should become degenerate when the QCD chiral symmetry is restored. The axial-vector spectra are experimentally more challenging to construct than those of vector mesons that directly couple to virtual photons and then to dileptons. Chiral mixing of the vector with axial-vector mesons is thus a key phenomenon to probe in-medium modifications of vector...
Go to contribution page -
Mr Samapan Bhadury (Jagiellonian University)
Relativistic hydrodynamics has been plagued with the problem of causality for a long time. While the proposal of MIS theories resulted in the restoration of causality, it introduced new degrees of freedom with no thermodynamic origin. Recent formulations of first-order hydrodynamics theories of BDNK type, where the hydrodynamic fields have generalized definitions, are both causal, and use only...
Go to contribution page -
Qian Chen Qian Chen (Guangxi Normal University)
Higher-order moments of conserved charge fluctuations, such as net-charge, net-baryon, and net-strangeness, are sensitive experimental probes for investigating the critical fluctuations in relativistic heavy-ion collisions. We calculate the cumulants and correlation functions of proton, antiproton, and net-proton multiplicity distributions in Au + Au collisions at √sNN = 7.7 GeV using a...
Go to contribution page -
Ilia Grishmanovskii (ITP, Frankfurt)
An understanding of the energy loss of fast partons passing through the strongly interacting quark-gluon plasma (QGP) is important for the interpretation of experimental data on jet attenuation in the QGP created in heavy-ion collisions, as well as for the study of the modification of the QGP itself. However, gaining this knowledge is a challenging task, since it is related to the...
Go to contribution page -
Yushan Mu (Fudan University)
It has recently been realized that in the ultra-central heavy-ion collisions, mean transverse momentum of hadrons contains the information of the fundamental thermodynamic properties of quark-gluon plasma (QGP). In particular, in nucleus-nucleus collisions the linear correlation between the mean transverse momentum and the charged multiplicity is attributed to the QCD speed of sound, which...
Go to contribution page -
Yuli Kong (Central China Normal University)
Triangular flow in heavy-ion collisions, $v_{3}$, represents the third harmonic coefficient in the Fourier expansion of the azimuthal distribution of produced particles relative to the collision event plane. Since $v_{3}$ is sensitive to initial fluctuations of nucleons, it serves as a valuable tool for studying the fluctuations of the early initial conditions of the system and the...
Go to contribution page -
Lorenzo Bernardinis (Universita e INFN Trieste (IT))
Hadronisation is the complex process by which hadrons form from partons. Due to its non-perturbative nature, an exact theoretical description is unavailable, making phenomenological assumptions necessary. Currently, various hadronisation models are implemented in the Monte Carlo event generator PYTHIA 8.311. In this poster, we discuss tuning these hadronisation models using Professor [1] to...
Go to contribution page -
Barnabas Porfy (HUN-REN Wigner Research Centre for Physics (HU))
The most recent measurements of femtoscopic correlations at NA61/SHINE, using intermediate collision systems, unravel that the shape of the particle emitting source exhibits non-Gaussian properties over the available energies. The measurements are based on alpha-stable symmetric Lévy sources, and we discuss the average pair transverse mass dependence of the source parameters. One of the...
Go to contribution page -
Rupam Samanta (AGH University of Krakow, Poland)
The collision of a proton and a lead nucleus is asymmetric in nature, leading to an asymmetric rapidity distribution (more particles produced in the Pb-going side) of the produced particles at ultrarelativistic energies. We study multiplicity in such collision as a function of pseudorapidity, and centrality defined from the energy deposited in a calorimeter. In particular, we focus on the...
Go to contribution page -
Liliana Apolinario (LIP (PT))
The tau-algorithm provides a reliable method for extracting QCD parton formation time within jet algorithms. As demonstrated in [1], it effectively distinguishes between heavily modified jets and those with minimal medium-induced changes, offering a robust measure of energy loss independent of the initial jet scale [2], unlike other jet substructure methods. In this talk, we demonstrate the...
Go to contribution page -
Ravi Shanker (The Institute of Mathematical Sciences)
In this work, we study the localization properties of the eigenstates of non-Abelian SU(3) gauge theory both with and without dynamical quark flavors in a gauge invariant manner, using first-principles lattice gauge theory techniques. We use the eigenspectrum of a probe (overlap) Dirac operator to understand the properties of thermal gauge ensembles of 2+1 flavor QCD generated using domain...
Go to contribution page -
Sayantan Sharma (IMSc)
We report our new results on the chiral crossover transition in 2+1 flavor QCD on $N_\tau=8$ lattice using the Mobius domain wall fermion (MDWF) discretization scheme. By performing a high statistics study of the disconnected part of the chiral susceptibility, $\chi_{disc}$, we extract a pseudo-critical temperature, $T_{pc}=158.9(-2.1)(+2.6)$ MeV. This is in very good agreement with the...
Go to contribution page -
Anju Bhasin (University of Jammu (IN)), Meenakshi Sharma (University of Jammu (IN))
The relative increase in the production of strange hadrons with respect to non-strange hadrons in heavy-ion collisions was historically considered one of the signatures of QGP formation. However, recent measurements in proton-proton (pp) and proton-lead (p--Pb) collisions have shown features that are reminiscent of those observed in lead-lead (Pb--Pb) collisions, i.e. an increase in the...
Go to contribution page -
Ke Li (Huzhou University)
Azimuthal anisotropy is by now a standard observation in relativistic heavy-ion collisions, believed to primarily result from hydrodynamic expansion of the created hot and dense quark-gluon plasma (QGP). Ubiquitous observations of azimuthal anisotropy have also been made in small-system (proton-proton, proton-nucleus, and deuteron/$^{3}$He-nucleus) collisions. These observations, while...
Go to contribution page -
Leon Sieke (Justus-Liebig-Universität Giessen)
We study the critical dynamics of a scalar field theory with $Z_2$ symmetry in the dynamic universality class of Model A in two and three spatial dimensions with classical-statistical lattice simulations. In particular, we measure the non-equilibrium behavior of the system under a quench protocol in which the symmetry-breaking external field is changed
Go to contribution page
at a constant rate through the critical... -
Dekrayat Almaalol (University of Illinois Urbana-Champaign)
We propose a novel set of flow observables designed to probe event-by-event fluctuations of conserved charges in relativistic high-energy collisions. We find that, in $\rm Pb\texttt{+}Pb$ collisions at the LHC $\sqrt{s_{NN}}=5.02$ TeV, our observables are sensitive to local fluctuations in baryon number (B), strangeness (S), and electric charge (Q), which in turn lead to measurable effects in...
Go to contribution page -
Xinli Zhao (University of Shanghai for Science and Technology)
Understanding the impact of nuclear structure in high-energy nuclear collisions is critical to advancing our knowledge of quark-gluon plasma (QGP) formation. In this study, we investigate the role of nuclear clustering, in particular the alpha-cluster structure in $\rm ^{16}O$, using anisotropic flow observations from $\rm ^{16}O+^{16}O$ collisions at RHIC energy. Through systematic...
Go to contribution page -
Manuel Ramirez Garcia (University of Michigan (US))
Jet substructure measurements at the LHC produce precision tests of jet formation and fragmentation in vacuum as well as at the high temperatures and densities formed in heavy-ion collisions. Jets containing a heavy-flavor hadron drive these QCD measurements into a regime where parton mass and colour factors are critical, pushing the limits of theoretical calculations both in-vacuum and...
Go to contribution page -
Prof. Guang-You Qin (Central China Normal University)
Recent CMS measurements of high-multiplicity jets have revealed intriguing structures in two-particle correlations within jets containing over 80 charged tracks, potentially indicating the presence of final-state interactions beyond those modeled in existing parton shower frameworks. We investigate two mechanisms of final-state interaction that may become significant when the phase-space...
Go to contribution page -
Mr Hirak Kumar Koley (Jadavpur University (IN))
The study of hadronic resonances provides valuable information about the final state interactions and the system evolution in ultra-relativistic nuclear collisions. Due to their short lifespan, comparable with the duration of the hadronic phase, resonances can be affected by the competing re-scattering and regeneration mechanisms. In particular, their decay daughters interact elastically with...
Go to contribution page -
Jianing Li
Recent heavy-ion collision experiments at intermediate energies are intensively focused on probing the QCD phase diagram to reveal critical behavior associated with the possible critical point. In these collisions, the produced fireball exhibits significant inhomogeneity along the rapidity direction, covering a broad region of the QCD phase diagram. This spatial variation offers a unique...
Go to contribution page -
Vit Kucera (Inha University (KR))
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 $\rm{e}^{+}\rm{e}^{-}$ and $\rm{ep}$ collisions. Exploration of this phenomenon is most controlled in the heavy-flavour sector, where the large mass of charm or beauty quarks allows us to experimentally relate a...
Go to contribution page -
YUNSHAN CHENG
The chiral magnetic effect (CME) in heavy-ion collisions probes the topological sector of quantum chromodynamics, where parity and charge-parity symmetries are locally violated. We will present the STAR results on the CME search from the BES-II data at STAR using a novel Event-Shape Selection (ESS) method to suppress the flow-related background. EBE-AVFD simulations have shown that the ESS...
Go to contribution page -
Jens Andreas Hügel
We explicitly verify the validity of the open source package KøMPøST~[1] for modelling the early time dynamics of the QGP in heavy ion collisions. Since KøMPøST is based on the dynamics of a kinetic theory description to implement a macroscopic evolution of the energy-momentum tensor, we assess its applicability by comparing KøMPøST results to fully microscopic calculations in kinetic theory...
Go to contribution page -
Zhong-Hua Zhang (Fudan University)
We derive expressions for the vector and tensor components of the spin polarization of massive vector bosons at local thermodynamic equilibrium, considering second-order spacetime gradients of thermodynamic fields—temperature, chemical potential, and flow velocity—in a relativistic fluid. A set of Feynman rules is developed to compute the Wigner function and matrix-valued spin-dependent...
Go to contribution page -
Gowthama K K (Indian Institute of Technology Bombay)
Momentum transport in a medium is characterized quantitatively by its shear and bulk viscosities. The shear viscous coefficient ($\eta$) governs the momentum transport transverse to the hydrodynamic flow while its bulk counterpart ($\zeta$) does the same along the flow. In the context of quark gluon plasma (QGP), both $\eta$ and $\zeta$ are very important transport coefficients, controlling...
Go to contribution page -
Robin Sattler
In most fields of science, visualizations help to understand concepts and to identify potential issues. For these reasons, animations of relativistic heavy-ion collisions provide interesting visual insights into the simulation software used as well as the time evolution of the collisions. In our work, we produce animations for collisions at several beam energies below 200 GeV for different...
Go to contribution page -
Arjun Srinivasan Kudinoor (Massachusetts Institute of Technology), Dr Daniel Pablos (INFN Torino), Krishna Rajagopal (Massachusetts Inst. of Technology (US))
We begin by using Hybrid Model calculations to reproduce experimental results published by ATLAS in 2023 on $R_{AA}$ for $R=1$ jets in Pb+Pb collisions. These jets are identified by first reconstructing anti-$k_t$ $R=0.2$ subjets and then re-clustering them. Following ATLAS, we investigate how $R_{AA}$ for these large-radius jets depends on the angle between the two subjets involved in the...
Go to contribution page -
Thandar Zaw Win (IIT Bhilai)
The Wiedemann-Franz law, a hallmark of non-relativistic electron transport, relates the thermal and electrical conductivities through a constant Lorenz ratio. This ratio remains fixed in conventional metals, consistent with Fermi gas and Fermi liquid theory. Interestingly, quarks or hadrons in the matter produced in RHIC or LHC experiments don't follow this law. This high-energy nuclear...
Go to contribution page -
Chandrodoy Chattopadhyay (North Carolina State University)
We explore the emergence of collective behavior in a weakly-coupled quark-gluon plasma using relativistic kinetic theory. To model the plasma formed in central high-energy nuclear collisions, we consider a system that expands boost-invariantly along the longitudinal (beam) direction and develops azimuthally symmetric transverse flow. Using the Boltzmann equation and a special set of moments of...
Go to contribution page
Choose timezone
Your profile timezone: