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Kenta Shigaki (Hiroshima University (JP))24/04/2023, 09:30
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Prof. Atsushi Sugeta (Executive Vice President (Research), Hiroshima University)24/04/2023, 09:40
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Yorito Yamaguchi (Hiroshima University (JP))24/04/2023, 09:50
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Hidetoshi TAYA24/04/2023, 10:00Oral
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Saehanseul Oh (LBNL)24/04/2023, 11:00Oral
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Yasuki Tachibana (Akita International University)24/04/2023, 11:40Oral
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Hidefumi Matsuda24/04/2023, 13:50
The real-time lattice simulation of the classical Yang-Mills (CYM) field is widely used to describe the non-equilibrium evolution of the highly-occupied and weakly coupled gluon matter, called glasma, in the early stage of the relativistic heavy-ion collision. When we study the glasma with the CYM simulation, we often assume no rapidity dependence, namely the boost invariance. This assumption...
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Dr Akihiko Monnai (Osaka Institute of Technology)24/04/2023, 13:50
The relativistic hydrodynamic model has been vital to the analysis of the QCD matter created in high-energy heavy-ion collisions. Experimental data indicate that low momentum particles are thermal and hydrodynamic, while high momentum particles are non-thermal and perturbative. We investigate two scenarios - (i) the Tsallis hydrodynamic model where an extended momentum range is treated as...
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Xin Wu (University of Science and Technology of China)24/04/2023, 13:50
The collective observables play critical roles in probing the properties of quark-gluon-plasma created in relativistic heavy-ion collisions, in which the information on initial collision geometry is crucial. However, the initial collision geometry, e.g., the reaction plane, cannot be directly extracted in the experiment. In this talk, we demonstrate the idea of determining the reaction plane...
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Kaifeng Shen24/04/2023, 14:15
The Lorentz-boosted electromagnetic field, arising from a colliding nucleus, can be treated as a flux of quasi-real photons. Consequent photonuclear ($\propto$ $Z^{2}$) and photon-photon ($\propto$ $Z^{4}$) processes could reasonably explain the observed enhancements of $J/\psi$ and $e^{+}e^{-}$ pair production at very low transverse momenta ($p_{T}$) in peripheral heavy-ion collisions. The...
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Xiaoyu Liu24/04/2023, 14:15
Directed flow ($v_{1}$) describes the collective sideward motion of produced particles and nuclear fragments in heavy-ion collisions. The pseudorapidity ($\eta$) dependence of $v_{1}$ can provide unique constraints on the initial conditions and dynamical evolution of the Quark Gluon Plasma (QGP). Directed flow in both spectator and participant regions is sensitive to early non-equilibrium...
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Dr Jie Zhao (Fudan University)24/04/2023, 14:15
The electron scattering process has been used to determine the nuclear charge radius. Similarly, the photon scattering process can be used to determine the nuclear strong-interaction radius, primarily through the diffractive photoproduction of vector mesons. Such an approach has been proven effective at RHIC. The isobar collisions of Ru+Ru and Zr+Zr at RHIC provided an excellent opportunity...
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Yongjia Wang24/04/2023, 14:40
The nuclear equation of state (EOS) plays a crucial role in understanding diverse phenomena in nuclear structure and reactions, as well as in astrophysics. Heavy-ion-collision measurements in combination with transport model simulations serve as important tools for extracting the nuclear EOS. In this talk, I will introduce some results on constraining the nuclear EOS with elliptic flow in...
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Qiang Hu24/04/2023, 14:40
The Spin Hall Effect (SHE) is instrumental in investigating quantum effects in many-body systems. Recently,theoretical calculations indicate that the gradient of baryonic chemical potential (analogous to the electric field) can induce a sizable spin Hall current. At the RHIC Beam Energy Scan (BES) energies, the sign as well as the pattern of energy dependence of the difference in the second...
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Jing-an Sun (Fudan University), Li Yan (Fudan University)24/04/2023, 14:40
We propose a novel effect that accounts for the photon emission from a quark-gluon plasma in the presence of a weak external magnetic field. Although the weak magnetic photon emission from quark-gluon plasma only leads to a small correction to the photon production rate, the induced photon spectrum can be highly azimuthally anisotropic, as a consequence of the coupled effect of the magnetic...
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Hikari Murakami (University of Tokyo (JP))24/04/2023, 15:05
Dielectron production is a powerful tool to investigate the properties of the quark-gluon plasma created in relativistic heavy-ion collisions, as they carry information about the temperature of the medium and its space-time evolution without any distortion due to final-state interactions. If a medium is created in such small colliding systems, it should give rise to an additional contribution...
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Xiang-Yu Wu24/04/2023, 15:05
We perform a systematic study on the local and global spin polarization of $\Lambda$ and $\bar{\Lambda}$ hyperons[1] in relativistic heavy-ion collisions at beam energy scan energies via the (3+1)-dimensional CLVisc hydrodynamics model[2] with a AMPT and SMASH initial conditions. Following the quantum kinetic theory, we decompose the polarization vector as the parts induced by thermal...
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Gaoguo Yan24/04/2023, 15:05
Studies of longitudinal de-correlation of anisotropic flow can provide unique constraints on the three-dimensional structure of the initial stages and dynamical evolution of the quark-gluon-plasma in heavy-ion collisions. Experimentally, the factorization ratio, $r_{n}(\eta)(n = 2,3)$, is used to quantify the amount of the longitudinal flow de-correlation with pseudorapidity [1-3]. With data...
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Zhong Yang (CCNU)24/04/2023, 15:50
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. We explore the 3D structure of the diffusion wake induced by $\gamma$-triggered jets in Pb+Pb collisions at the LHC energy within CoLBT-hydro model. We identify a valley structure caused by the diffusion wake on top of a ridge from the...
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Prof. Qun Wang (University of Science and Technology of China)24/04/2023, 15:50
We propose a relativistic theory for spin density matrices of vector mesons based on Kadanoff-Baym equations in the closed-time-path formalism. The theory puts the calculation of spin observables such as the spin density matrix element $\rho_{00}$ for vector mesons on a solid ground. Within the theory we formulate $\rho_{00}$ for $\phi$ mesons into a factorization form in separation of...
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Lixin Yang (Sun Yat-sen University)24/04/2023, 15:50
We study the two-point functions from chiral kinetic theory which characterize the response to perturbative vector and axial gauge fields in magnetized chiral plasma. In the lowest Landau level approximation, the solution of chiral kinetic equations gives density waves of electric and axial charges, which contain chiral magnetic wave implied by the axial anomaly and magnetic field. We then...
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Dr Haojie Xu (Huzhou University)24/04/2023, 16:15
Relativistic heavy ion collisions, especially the recent isobar ($^{96}_{44}$Ru+$^{96}_{44}$Ru and $^{96}_{40}$Zr+$^{96}_{40}$Zr) collisions, provide an opportunity to determine the structures of the colliding nuclei with good precision. Nuclear deformation, triaxiality, and sub-nucleon structure have recently been studied by $v_{n}-p_{T}$ correlations; size and shape differences between Ru...
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Xiujun Li (USTC)24/04/2023, 16:15
Hypernuclei are bound states of nucleons and hyperons. Precise measurements of hypernuclei properties and production yields can shed light on the poorly understood hyperon$-$nucleon (Y-N) interaction and production mechanisms of hypernuclei.
Thanks to the high statistics data and low collision energies, the STAR beam energy scan phase-II program provides a great opportunity to study...
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Dr Yayun He (South China Normal University)24/04/2023, 16:15
Abstract: Jet energy loss and transverse momentum broadening can be implicitly represented by jet transport coefficient $\hat{q}$ distributed in the whole phase space of the QGP medium. The gradient of $\hat{q}$ perpendicular to the momentum direction of an energetic parton leads to an asymmetry of the transverse momentum distribution, which can be used for the initial jet production...
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Tulika Tripathy (IIT- Indian Institute of Technology (IN))24/04/2023, 16:40
Event-by-event fluctuations of mean transverse momentum, $\langle p_{\rm{T}}\rangle$, help to characterize the properties of the bulk of the system created in ultrarelativistic heavy-ion collisions, called the quark-gluon plasma (QGP). The fluctuations are closely related to the dynamics of the phase transition from the QGP to a hadron gas.
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In this contribution, event-by-event fluctuations... -
LongGang Pang (Central China Normal University)24/04/2023, 16:40
Mach cones are expected to form in the expanding quark-gluon plasma (QGP) when energetic quarks and gluons (called jets) traverse the hot medium at a velocity faster than the speed of sound in high-energy heavy-ion collisions. The shape of the Mach cone and the associated diffusion wake are sensitive to the initial jet production location and the jet propagation direction relative to the...
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Mr Hyeongock Yun (Yonsei University)24/04/2023, 16:40
We calculate the yields of molecular configuration hadrons produced by heavy ion collision using coalescence model. First, we calculated the transverse momentum distribution of deuteron using the coalescence model from proton transverse momentum distribution in Pb-Pb collisions at 2.76TeV measured by ALICE collaboration. From this, we estimate the parameters required for coalescence model at...
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Dr Lijia Jiang (Northwest University)24/04/2023, 17:05
The QCD phase transition signals at RHIC are expected to be observed via the measurement of net-proton's high order cumulants [1]. In this talk, we will present our recent study of dynamical effects on the high order cumulants of the QCD chiral field in a system with finite-size. We find much stronger memory effects on the first-order phase transition side than on the crossover side. Besides,...
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Dr Philipp Gubler (JAEA)24/04/2023, 17:05
There is presently no consensus on how the $\phi$ meson mass and width will
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change once it is put in a dense environment such as nuclear matter.
While many theoretical works exist, connecting them with experimental
measurements remains non-trivial task, as the $\phi$ meson in nuclear matter is
usually produced in relatively high-energy pA reactions, which are generally... -
Qing Zhang (CCNU)24/04/2023, 17:05
Groomed jet substructure measurements, the momentum splitting fraction $z_g$ and the groomed jet radius $R_g$, for inclusive, D$^0$-tagged and B$^0$-tagged jets in $pp$ and central Pb+Pb collisions at $\sqrt{s}=5.02$ TeV are investigated. Theoretical results for light-quark initiated and gluon initiated jets are provided as references. Charged jets are constrained in a relative low transverse...
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Chitrasen Jena (National Institute of Science Education and Research (NISER) (IN))25/04/2023, 09:20Oral
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Azumi Sakai25/04/2023, 10:00Oral
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Jinhui Chen25/04/2023, 11:00Oral
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Di-Lun Yang25/04/2023, 11:40Oral
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Satoshi Yano (Hiroshima University (JP))25/04/2023, 13:50Oral
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Dr KaiJia Sun (Institute of Modern Physics, Fudan University, Shanghai, China)25/04/2023, 14:30Oral
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Dr Subhash Singha (Institute of Modern Physics Chinese Academy of Sciences)25/04/2023, 15:10Oral
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Chiho Nonaka25/04/2023, 16:20
We analyze the effect of hydrodynamic fluctuations on normalized mixed harmonic cumulants (nMHC) based on a realistic dynamical model of the high-energy heavy-ion collisions for the first time.
The spacetime evolution of quark-gluon plasma (QGP) in high-energy heavy-ion collisions is described by hydrodynamics. The transport properties of QGP such as shear and bulk viscosity have been...
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TOMOYA KATO (Rikkyo University(for the sPHENIX-INTT collaboration))25/04/2023, 16:20
The sPHENIX experiment at Brookhaven National Laboratory (BNL) is a next-generation experiment equipped with a large solid angle detector to detect jets and precisely measure QGP properties. sPHENIX's INTT detector is a strip-type silicon detector that is positioned 7~10 cm from the collision point. The signal transmission cable of the INTT detector requires the development of a conversion...
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Hiroyuki Sako (Japan Atomic Energy Agency)25/04/2023, 16:20
J-PARC is one of the world’s highest-intensity proton accelerators for material and life sciences, neutrino physics, and hadron and nuclear physics in the GeV energy region. We are planning to accelerate world's high-intensity heavy-ion beams at J-PARC. We will build a new compact heavy-ion linac and a booster ring as an injector, while we utilize the existing RCS and MR synchrotrons to...
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Yui Hayashi (YITP, Kyoto University)25/04/2023, 16:20
It is widely believed that gauge theories with fundamental matters exhibit a smooth connection between the confining and Higgs regimes. This Higgs-confinement continuity is of crucial importance to the quark-hadron continuity conjecture, which claims a smooth crossover between the nuclear superfluidity and color superconducting phases in dense QCD. Certain gauge theories with superfluidity,...
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Mamoru Yamamoto (Sophia University)25/04/2023, 16:20
Hanbury Brown and Twiss (HBT) interferometry is used to investigate the shape and size of the matter produced in high-energy nuclear collisions. The Koonin-Pratt equation, which represents convolutions of the source function and the two-particle wave function in vacuum, has been used for the analysis. However, particles produced in a medium are affected during passing through it. In this talk,...
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Hiroki Ohata (YITP, Kyoto University)25/04/2023, 16:20
The Schwinger model (QED in one spatial dimension) is known as a toy model of QCD. We perform a Monte Carlo study of the Schwinger model at finite density. We circumvent the notorious sign problem by using the bosonization technique. We find that the number density is a smooth function of the chemical potential. This talk is based on arXiv:2303.05481 [hep-lat].
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Jaeyoon Cho (Inha University (KR))25/04/2023, 16:20
Recent measurements of the baryon-to-meson production yield ratios between charm baryons ($\Lambda_\mathrm{c}^{+}$, $\Sigma_\mathrm{c}^{0,++}$, $\Xi_\mathrm{c}^{0,+}$, $\Omega_\mathrm{c}^{0}$) and $\mathrm{D}$ mesons ($\mathrm{D}^0$) in small collision systems show a significant enhancement with respect to the measurements performed in $e^{+}e^{-}$ collisions. These results were compared with...
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Younghoo Hong (Inha University)25/04/2023, 16:20
Quark-gluon plasma is a substance that scientists predict existed in the early universe according to Quantum Chromodynamics, and evidence for its existence is being discovered through both theory and experiment. Since QGP is in thermal equilibrium, researchers are studying its thermal properties to understand how it evolves over time. As the temperature rises, mesons separate into quarks and...
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Liang Zhang (Shanghai Institute of Applied Physics, Chinese Academy of Sciences)25/04/2023, 16:20
The studies of multi-strangeness hypernuclei help us further understand the interaction between hyperons and nucleons. This work discusses the productions of triple-baryons including $\Omega$, namely $\Omega NN$ and $\Omega\Omega N$, their decay channels and the baryon number dependence of productions. A variation method is used in calculations of bound states and binding energy of $\Omega NN$...
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Kanato Matsutani (Hiroshima University), Wataru Yamauchi (Hiroshima University)25/04/2023, 16:20
EIC stands for Electron-Ion Collider, a circular accelerator to be constructed at BNL, which is expected to discover new physics, such as those related to gluon condensation, by colliding electrons and nuclei.
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In Japan, the EIC Japan group has been established and is active.
The Japan group has decided to proceed with the development of barrel TOF and is planning to use AC-LGAD in its... -
245. Thermodynamic properties of QGP formation with one loop correction at finite chemical potentialProf. Shougaijam Somorendro Singh25/04/2023, 16:20Poster
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Asanosuke Jinno25/04/2023, 16:20
The hyperon puzzle, namely the problem that hyperonic matter equations of state cannot support the observed massive neutron stars, has been attracting much attention. One of the proposed scenarios is that the $\Lambda$ particles do not appear even at high densities due to the repulsive $\Lambda$ potential at high densities generated by the $\Lambda$NN three-body force between the $\Lambda$...
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Sungtae Cho25/04/2023, 16:40
We discuss anisotropic flow, or elliptic and triangular flow of charmonium states in heavy ion collisions using the coalescence model. Starting from the investigation on transverse momentum distributions of charmonia, we calculate elliptic and triangular flow of charmonium states produced at quark-hadron phase boundary by quark recombination. We argue that the wave function distribution plays...
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Hangil Jang (Pusan National University (KR))25/04/2023, 16:40
During the Long Shutdown 3 (2026-2028) at LHC, ALICE is planning to replace the innermost three layers of the existing inner tracking system (ITS2) with a new silicon detector (ITS3) which is under development. ITS3 is based on truly cylindrical half barrels using wafer-scale monolithic active pixel sensors reducing the material budget and significantly. Thus, ITS3 will improve the trajectory...
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Motoi INABA (Tsukuba University of Technology)25/04/2023, 16:40
The ALICE Collaboration is planning to install a new forward calorimeter (FoCal) as a detector upgrade to the ALICE experiment at LHC during the next long shutdown from 2027 to 2029. FoCal consists of the Si+W electromagnetic and conventional sampling hadronic subsystems (FoCal-E and FoCal-H, respectively), and it will cover the pseudorapidity interval of 3.4 < η < 5.8 at a place of 7 meters...
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Shunichiro Muraoka (for ALICE Collaboration)25/04/2023, 16:40
In non-central high-energy nuclear collision, very strong magnetic field is produced. High intensity magnetic field have never been directly detected experimentally, and we propose to measure virtual photon polarization as direct evidence. Since anisotropy appears in the lepton pair decay plane of a virtual photon polarized by a magnetic field, we aim to detect virtual photon polarization by...
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Yasuhiro Yamaguchi25/04/2023, 16:40
Hadron interactions are important for understanding the hadron composite states such as exotic hadrons and hadronic nuclei. However natures of hadron interactions are still poorly understood. In recent years, lattice QCD analysis and measurements of correlation functions in heavy-ion collisions have provided information on the heavy hadron interactions.
In this work, we investigate the...
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Azumi Sakai25/04/2023, 16:40
We investigate the effect of chiral symmetry restoration on dilepton invariant mass spectra measured in high-energy heavy-ion collisions. The hadron properties such as the hadron spectra change when the chiral symmetry restores in the hot medium created in high-energy heavy-ion collisions. We analyze the dilepton invariant mass spectra with hadron spectra obtained from different chiral...
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Hyunji Lim (Pusan National University (KR))25/04/2023, 16:40
The motivation of geometry engineering with p, d, and 3He projectiles at RHIC is to investigate the relation between initial geometry and final momentum anisotropy, which is thought to be strong evidence of QGP. PHENIX results show the elliptic and triangular flow hierarchy in p/d/3He+Au collisions follows the eccentricity described by the MC Glauber model. However, the initial geometry of...
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Mr Liqiang Zhu (Central China Normal University)25/04/2023, 16:40
We employ the AdS/CFT correspondence to study the jet quenching effect in Quark-gluon plasma in heavy-ion collisions.The nuclear modification factor $R_{AA}$ and elliptic flow parameter $v_{2}$ are studied in different-centrality collisions at RHIC and LHC.Our numerical results agree with data.Magnetic field and chemical potential of the medium are also considered for the observable...
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Hyebin Park (Sungkyunkwan University (KR))25/04/2023, 16:40
In this study, we present the model study of the charged-particle multiplicity density, dNch/dη in Pb-Pb collisions at a centre-of-mass energy per nucleon-nucleon pair of $\sqrt{s_\mathrm{NN}}$ = 5.36 TeV. The centre-of-mass energy for Pb-Pb collisions is the highest ever that is planned to be collected by LHC at the end of 2022 for the first time. The multiplicity of charged particles...
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Qingfei Han25/04/2023, 16:40
Jet quenching is an important probe to quark-gluon plasma created in high-energy heavy-ion collisions. A significant parameter is known as jet transport coefficient $\hat{q}$ for jet eneygy loss, characterizing the interaction between the parton jet and medium. We study nuclear modification factors of hadron at large $p_T$ in central $A+A$ collisions in a NLO pQCD parton model in which parton...
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Dr Nodoka Yamanaka (KMI, Nagoya University)25/04/2023, 16:40
We show that the topological charge of nonabelian gauge theory is not observable. We then inspect the phenomenological consequences to hadron physics and experiments such as the physical relevance of the axial U(1) symmetry and the unobservability of the chiral magnetic effect.
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Diyu Shen25/04/2023, 17:00
Strong electromagnetic (EM) field in heavy-ion collisions could leave an imprint on the final-state particles. Due to such EM field, particles and anti-particles with opposite charges will receive opposite contributions to their rapidity-odd directed flow. Here, we present the charge-dependent measurements of $dv_1/d\mathsf{y}$ near midrapidity for $\pi^{\pm}$, $K^{\pm}$, and $p(\bar{p})$ in...
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Xiaoli Luo25/04/2023, 17:00
We derive the chiral kinetic equation in 8 dimensional phase space in non- Abelian SU(N) gauge field within the Wigner function formalism. By using the “covariant gradient expansion”, we disentangle the Wigner equations in four-vector space up to the first order and find that only the time-like component of the chiral Wigner function is independent. After color decomposition, we present the...
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Su-Jeong Ji (Pusan National University (KR))25/04/2023, 17:00
In relativistic heavy-ion collisions, a hot and dense medium called QGP is created. Intriguingly, the collective motion of produced particles, which is thought to be evidence of the formation of strongly interacting QGP, has also been observed in high-multiplicity events of small systems like $pp$ and $p$--Pb collisions. In addition, studying the flow of identified particles with different...
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Mr Ren Ejima (Hiroshima University (JP))25/04/2023, 17:00
A new detector was installed in ALICE in the forward region during LHC LS2 with the aim to improve the accuracy of the dimuon opening angle measurement more than ever since the LHC Run 3. Such new detector cannot identify muons and measure their momentum, so it must be used in combination with an existing detector. Therefore, it is necessary to correctly match the tracks reconstructed by...
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Dr Maowu Nie (Shandong University (SDU))25/04/2023, 17:00
Fluctuations of harmonic flow along pseudorapidity $\eta$, known as flow decorrelations, is an important probe of the initial condition and final state evolution of the quark-gluon plasma. We show that the flow decorrelations are sensitive to the deformations of the colliding nuclei. This sensitivity is revealed clearly by comparing flow decorrelations between collisions of isobars,...
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Yuxin Xiao (CCNU)25/04/2023, 17:00
Jet shape is studied with a linear Boltzmann transport model for event-by-event simulations of photon-tagged jets in heavy-ion collisions. The transverse momentum asymmetry $A_{\perp}$ is shown to increase with the initial transverse position when the gradient of jet transport coefficient $\hat{q}$ increases until at the edge of the nonuniform medium. On one hand,the shape of the photon-tagged...
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Hyungjun Lee (Sungkyunkwan University (KR))25/04/2023, 17:00
The fragmentation of partons is studied using the jet fragmentation transverse momentum, j_{T}. The j_{T} is defined as the perpendicular component of the momentum of the constituent particle with respect to reconstructed jet momentum, \vec{p}_{jet}. The jT provides a measurement of the transverse momentum spread of the jet fragments. Recently, the direct dead-cone effect was measured by ALICE...
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Shu-Qing Li25/04/2023, 17:00
We explore the system size dependence of heavy-quark-QGP interaction by studying the HF meson suppression and elliptic flow in four different collisions at the LHC. Within an advanced Langevin-hydrodynamics framework, we provides a reasonable description of the D meson RAA and v2 in Pb-Pb collisions, as well as predictions for both D and B meson observables in other collision systems yet to be...
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Shunsuke Kurita (for the ALICE 3 RICH Collaboration)25/04/2023, 17:00
ALICE3, the next-generation heavy-ion experiment, has been proposed for the LHC RUN 5 and 6 to investigate the Quark Gluon Plasma properties, exploiting precise measurements of heavy-flavour probes as well as electromagnetic radiation. These measurements require excellent particle identification (PID) capabilities in a wide transverse momentum range.
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The development of a Ring Imaging... -
Minghua Wei (Fudan University)25/04/2023, 17:00
Vorticities in heavy-ion collisions (HIC) are supposed to induce spin alignment and polarization phenomena of quarks and mesons. In this paper, we consider a uniformly rotating medium in which quark and anti-quark pairing are suppressed. Consequently, in the framework of Nambu-Jona-Lasinio (NJL) model, dynamical quark masses are descending as the angular velocities grow. In case of vector...
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Jaehyeok Ryu (Pusan National University (KR))25/04/2023, 17:00
Jets provide unique and powerful probes to study Quantum Chromodynamics in proton-proton collisions and the quark-gluon plasma medium in heavy-ion collisions. Among these probes, measurement of jet substructure and of the distribution of hadronic constituents within a jet provide a detailed look into the partonic shower process. ALICE has recently measured and published transverse momentum...
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He-Xia Zhang25/04/2023, 17:20
By means of real-time hard thermal loop resummed technique combined with dimension two gluon condensate, we (non-)perturbatively study how the strong magnetic field induced by colliding nuclei affects both heavy quark (HQ) potential and HQ momentum diffusion coefficient in the QGP. We show that HQ momentum diffusion coefficients become anisotropic, and with increasing temperature, the higher...
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Xiaoli Luo25/04/2023, 17:20
We derive the chiral kinetic equation in 8 dimensional phase space in non- Abelian SU(N) gauge field within the Wigner function formalism. By using the “covariant gradient expansion”, we disentangle the Wigner equations in four-vector space up to the first order and find that only the time-like component of the chiral Wigner function is independent. By color decomposition, we present the...
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Mr Joonsuk Bae (Sungkyunkwan University (KR))25/04/2023, 17:20
High-energy partons generated in relativistic particle collisions create well-collimated showers of particles, which are called jets. The jet study is used widely in heavy-ion collisions, where the quark-gluon plasma (QGP) medium forms. Previous studies from RHIC and LHC indicate that dijet invariant mass can be sensitive to modifications caused by the QGP medium. In this study, we present a...
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Sandeep Chatterjee (IISER, Berhampur)25/04/2023, 17:20
Experimentally observed splitting of directed flow ($v_1$) between proton and anti-proton has been a challenging observable for the models to describe. We propose a two-component baryon deposition scheme driven by participants as well as binary collision sources. Evolving such a profile through a hybrid framework (hydrodynamics + hadronic transport), we are able to capture the $v_1$ of light...
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Xiaowen Li25/04/2023, 17:20
Extremely large angular orbital momentum can be produced in non-central heavy-ion collisions,leading to a strong transverse polarization of partons that scatter through the QGP due to spin-orbital coupling.We develop a perturbative approach to describe the formation and spacetime evolution of quark polarization inside the QGP.Polarization from both the initial hard scatterings and interactions...
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Kento Kimura (Hiroshima University (JP))25/04/2023, 17:20
The short-lived resonances are sensitive probes of the hadronic phase whose lifetime is several fm/$c$ in heavy-ion collisions. The final state yields are expected to be affected by re-scattering and regeneration after chemical freeze-out. The measured yield of resonances tends to be suppressed by the re-scattering of daughter particles with other hadrons. On the other hand, it tends to be...
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Yao Li25/04/2023, 17:20
Heavy flavor jets are powerful tools to gain insight into the in-medium partonic energy loss mechanisms and the transport properties of the quark-gluon plasma (QGP) in high-energy nuclear collisions. In this work, we present the first theoretical study of the longitudinal momentum fraction $z_{||}$ carried by $\rm{D^0}$ meson in jets in Pb+Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV. The...
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Hanseo Park (University of Tsukuba (JP))25/04/2023, 17:20
We are developing a Forward Calorimeter (FoCal) as one of the proposed ALICE upgrade projects at CERN. The FoCal extends the scope of ALICE, which was designed for the comprehensive study of hot and dense partonic matter, by adding new capabilities to explore the small-x region in parton distribution for nucleons and nuclei.
The electromagnetic calorimeter (FoCal-E) equipped with 18 pad...
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Lipei Du (McGill University)25/04/2023, 17:20
Using a (3+1)-D hybrid framework with parametric initial conditions, we study $v_1(y)$ of identified particles, including pions, kaons, protons, and lambdas, in Au+Au collisions performed at $\sqrt{s}$ ranging from 7.7 to 200 GeV. The dynamics in the beam direction is constrained using the measured pseudo-rapidity distribution of charged particles and the net proton rapidity distribution....
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WeiXi Kong25/04/2023, 17:20
We study the first-order Fox-Wolfram moment $H_1^T$ in relativistic heavy-ion collisions, where jet productions in p + p are simulated within a Monte Carlo event generator SHERPA 2.2.11, and the jet propagation in medium with the Linear Boltzmann Transport (LBT) model. Because of jet quenching effect, a suppression of the distribution at small $H_1^T$ region and an enhancement at large $H_1^T$...
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Jie Zhu (ccnu)25/04/2023, 17:20
Initial state fluctuations and final state anistropic flows have provided powerful tools for studying the evolution dynamics and transport properties of quark-gluon plasma produced in relativistic heavy-ion collisions. The quantitative research on anisotropic flow fluctuations may provide a unique potential to constrain the initial state models of heavy-ion collisions.
In this talk, we...
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Nathan Touroux25/04/2023, 17:40
Numerical hydrodynamics is an indispensable tool to describe the dynamics of relativistic heavy-ion reactions. Its stability is usually difficult to handle, especially in fluctuating hydrodynamics. We develop a stable implicit numerical method for solving relativistic hydrodynamics that can be more efficient than conventional explicit methods. Implicit methods are desirable considering their...
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Chiho Nonaka25/04/2023, 17:40
We have investigated the charge-dependent anisotropic flow in high-energy heavy-ion collisions, using relativistic resistive magneto-hydrodynamics (RRMHD).
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First, we construct a relativistic resistive magneto-hydrodynamic (RRMHD) numerical simulation code for high-energy heavy-ion collisions. We confirm that our code reproduces well the results of standard RRMHD tests in the Cartesian... -
Soyeon Cho (Inha University (KR))25/04/2023, 17:40
The Ridge behavior in high-multiplicity pp collisions has been discussed a lot since it was first reported in year. Because small systems cannot provide sufficient conditions to produce a medium called QGP, in which the ridge behavior is understood with hydrodynamics. In this work, we propose the pure kinematic mechanism between jets and medium partons as tools for describing the Ridge...
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Ziyang Li25/04/2023, 17:40
The strong electromagnetic field generated by the colliding nuclei in heavy-ion collisions can be represented by a spectrum of photons leading to photon-induced interactions. While such interactions are traditionally studied in ultra-peripheral collisions (UPC), significant enhancements of dilepton pairs and J/$\psi$ production at very low transverse momentum ($p_{\rm T}$) above the expected...
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Shin-ei Fujii (Sophia Univ.)25/04/2023, 17:40
Since phenomena induced by the hydrodynamic fluctuations include the information of transport coefficients, the study of fluctuations could open up a new way of diagnosing the QGP precisely. We derive equations of motion (EoM) of hydrodynamic fluctuations by considering the perturbative expansion of energy-momentum tensor around the Bjorken's boost invariant solution. These EoMs are derived...
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Tau Hoshino (Sophia University)25/04/2023, 17:40
Relativistic hydrodynamics has been successful in describing space-time evolution of matter created in high-energy nuclear collisions. One conventionally assumes that created matter becomes fluids all at once at a certain initial time. It is, however, not at all trivial from which stage after the collision the fluid picture can be applied. Whether non-linear hydrodynamic equations obey the...
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Mr Ryota Shishikura (for the sPHENIX-INTT collaboration)25/04/2023, 17:40
In April of this year, the sPHENIX experiment began at Brookhaven National Laboratory (BNL) in the United States, measuring the properties of a quark-gluon plasma (QGP) state created by colliding gold atoms accelerated by the Relativistic Heavy Ion Collider (RHIC). The sPHENIX Japan group (Nara Women's University, Rikkyo University, and RIKEN) is responsible for developing and constructing the...
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Shingo Sakai (University of Tsukuba (JP))25/04/2023, 17:40
Measurements of weak bosons, W$^{\pm}$ and Z$^{0}$, are powerful tools to study quantum chromodynamics (QCD). 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 and...
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Mengquan Yang (Central China Normal University)25/04/2023, 17:40
We carry out the first theoretical investigation on yields and the hardest parton splitting of large-radius jets reclustered from small radius ($R=0.2$) anti-$k_t$ jets in Pb+Pb collisions, and confront them with the recent ATLAS measurements.
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The Linear Boltzmann Transport (LBT) model is employed for jet propagation and jet-induced medium excitation in the hot-dense medium. We demonstrate... -
Toru Nishimura25/04/2023, 17:40
We study how the dilepton production rate (DPR) and the associated transport coefficients, the electric conductivity and relaxation time, are affected by the soft modes of the QCD critical point (CP) and the color superconducting (CSC) phase transition. We examine the modification of the photon self-energy by the so-called Aslamazov-Larkin, Maki-Thompson, and Density of States terms on the...
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Jongho Oh (Pusan National University (KR))25/04/2023, 17:40
The production of quarkonia in high-energy heavy-ion collisions has been studied extensively to understand their production mechanisms and properties of QGP. Recent PHENIX studies show that the increasing J/ψ yields versus multiplicity in p+p collisions are similar to results in different J/ψ acceptance and collision energy, implying that MPI contributes to J/ψ production at RHIC energy. The...
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Hyunwoo Kim (Inha University (KR))25/04/2023, 18:00
Neuron, the basic unit of nerve cells, transmits stimuli by sending neurotransmitters to other neurons when receiving signals above the threshold. The algebraic structure that mimics this process is called perceptron, the basic unit of the artificial neural network (ANN). The ANN is used to solve problems in many fields of data processing such as classification, and is a useful tool,...
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Keisuke Tomohiro (Hiroshima University (JP))25/04/2023, 18:00
The origin of hadron masses cannot be attributed to the Higgs mechanism alone. On top of that, spontaneous breaking of chiral symmetry, potentially restored at extremely high temperatures, should play an important role. Light vector mesons (ρ, ω, φ) are highly sensitive to chiral symmetry restoration, so that a modification in their mass is expected. This study evaluates the detectability of ω...
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Dr Shan-Liang Zhang (Central China Normal University)25/04/2023, 18:00
We investigate the flavor dependent jet quenching, by performing a systematic analysis of medium modifications of the inclusive jet, $\gamma$-jet, and $b$-jet in Pb+Pb collisions relative to those in pp at the LHC. Our results from MadGraph+PYTHIA and LBT well describe the experimental data of the inclusive jet, $\gamma$-jet and $b$-jet both in pp and AA collisions simultaneously. We then use...
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Hiroaki Ito (Osaka University)25/04/2023, 18:00
Recently, experimental measurements of the energy-momentum tensor (EMT) distribution inside hadrons receive attentions their theoretical investigations are becoming increasingly important. In this presentation, focusing on localized structures in quantum field theory, we calculate the one-loop correction to the distribution of EMT around a kink in 1 + 1 dimensional $\phi^4$ model and...
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Ryoka Tokumoto (Hiroshima University (JP))25/04/2023, 18:00
The precise knowledge of hyperon-hyperon interaction is one of the key measurements in QCD. To achieve this goal, it is fundamental to identify hyperons with a high purity in a high charged-particle multiplicity environment, such as a central Pb-Pb collisions. Thanks to its excellent particle identification and tracking performance, the ALICE experiment at the LHC is ideal for these...
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Hyunchul Kim (Chonnam National University (KR))25/04/2023, 18:00
The quark-gluon plasma(QGP) is considered the state of the early universe. The azimuthal anisotropy for charmonium states has been researched as one of the probes to understand the nature of the QGP. In this presentation, we will report recent progress regarding the study of the elliptic and triangular flow for prompt and nonprompt $\rm{J}/\psi$ and prompt $\psi$(2S) states in lead-lead...
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Kyoichiro Ozawa25/04/2023, 18:00
Study of a chiral symmetry in QCD attract wide interests to study the QCD phase diagram. It is theoretically predicted that the chiral symmetry is partially restored at a finite density matter and it can be observed as modifications of vector meson mass spectra. An experiment is being performed at J-PARC to measure mass modifications of vector mesons in a nucleus, which can be considered as a...
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Junseok Lee (Korea University (KR))25/04/2023, 18:00
The upgrades for Run 3 of the CMS experiment at LHC improves both hardware and software, resulting in the enhancement of detection efficiency and data streaming capabilities for the accumulation of the physics data. In this poster, we will introduce the latest strategy of the muon trigger for the Run3 heavy-ion experiment. It employs the newly developed algorithms to increase the trigger...
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Giyeong Kim (Inha University (KR)), Jiyoung Kim (Inha University (KR))25/04/2023, 18:00
FAZIA (Forward A and Z Identification Array) is designed to identify charges and masses of reaction products from heavy-ion collisions from a few tens of MeV to about a hundred MeV per nucleon.
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One basic unit of FAZIA consists of 4 x 4 shaped, three-layered telescopes.
The first and second layers are silicon sensors with different thicknesses of 300 um and 500 um, respectively, and one CsI... -
Muhamad Noor Izwan Ishak (Hiroshima University (JP))25/04/2023, 18:00
Heavy quarks, produced in hard-scattering processes in the very early stage of heavy-ion collisions, are efficient probes of the quark-gluon plasma (QGP) properties through its full evolution. They subsequently decay into particles such as muons and electrons. In ALICE, at LHC energies, muons are detected by the forward muon spectrometer and the Muon Forward Tracker (MFT). Full simulations...
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Mr Cendikia Abdi (Hiroshima University)25/04/2023, 18:00
The thermalization and chemical equilibration processes of the gluon dominated matter produced immediately after high energy collision are still poorly understood due to its far-from equilibrium nature. We use transport simulation to explore this phase where we include 2-to-3 interactions which are important to the thermal and chemical equilibration processes as the source of particle and...
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Yuko Sekiguchi (University of Tokyo (JP))26/04/2023, 09:20Oral
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Yuuka Kanakubo (University of Jyväskylä)26/04/2023, 10:00Oral
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Jinjoo Seo (Inha University (KR))26/04/2023, 11:00Oral
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Jiaxing Zhao (Tsinghua University)26/04/2023, 11:40Oral
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Lizardo Valencia Palomo (Universidad de Sonora (MX))26/04/2023, 13:50
At sufficiently high temperatures and pressure, Quantum Chromodynamics predicts that ordinary nuclear matter undergoes a phase transition. This new state of matter is called Quark Gluon Plasma (QGP) and is characterized by deconfined quarks and gluons. In this context, high energy heavy ion collions have been historically used to recreate the QGP in the laboratory. In recent years, at the...
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Mr Souvik Priyam Adhya (Institute of Nuclear Physics, Polish Academy of Sciences)26/04/2023, 13:50
In this work, we explore the impact of expansion of medium on angular distribution of gluons at different kinematical scales in a medium-induced cascade. Firstly, we study the scaling of the gluon spectra at low−$x$ between expanding and static media and numerically obtain transverse momentum broadened spectra. Next, we study angular distributions for the in-cone radiation for different media...
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Jeongseok Yoon (Inha University (KR))26/04/2023, 14:15
Previously, the ridge phenomenon in heavy-ion collisions such as PbPb has been well described by hydrodynamic models. However, the ridge structure of a small system, such as pp collisions, which could not offer enough conditions to create the medium required by hydrodynamic models, was observed in high-multiplicity events. This is why we focus on the Momentum Kick Model (MKM), which explains...
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qi zhou26/04/2023, 14:15
We study the energy loss of a quark moving in the strongly coupled $\mathcal{N} = 4$ supersymmetric Yang-Mills (SYM) plasma under the influence of spatial anisotropy. The heavy quark drag force, the diffusion coefficient and the jet quenching parameter are calculated within the Einstein-Maxwell-dilaton model, in which anisotropic background is specified by an arbitrary dynamical exponent...
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Koichi Murase (Yukawa Institute for Theoretical Physics, Kyoto University)26/04/2023, 14:40
We investigate how the event-by-event fluctuations of the final-state distribution function of nucleons physically affect the yield ratio of light nuclei based on the coalescence model.
The yield ratio of light nuclei, $N_tN_p/N_d^2$ (with $N_t$, $N_p$, and $N_d$ being triton, proton, and deuteron numbers, respectively) [1], is one of the observables suggested for a possible signal of the...
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Peng Ru (South China Normal University)26/04/2023, 14:40
We present a study of the nuclear-medium induced transverse momentum broadening of particle production in future electron-ion-collision (EIC) experiments. By considering the multiple scattering between hard partons and cold nuclear medium within the higher-twist factorization framework in perturbative QCD, we calculate the transverse momentum broadening of single hadron production in...
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Xinli Zhao (Fudan University)26/04/2023, 14:40
Using the string melting version of a multi-phase transport (AMPT) model without or with the sub-nucleon geometry for the proton to study multiparticle cumulants in p+p collisions at 13 TeV [1]. We have found that both versions of the model can produce c2{4}<0 for high-multiplicity events, which is thought to be the signal of the collective flow. The relation between c2{4} and the parton...
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Tomoya Hayata (Keio University)26/04/2023, 15:05
We study the zero-temperature and finite-density phase of QCD in 1+1 dimensions on the basis of Hamiltonian lattice QCD and matrix product states. We variationally approximate the wave function of the ground state with nonzero chemical potential using the density matrix renormalization group and compute physical observables such as equation of state, chiral condensate, and quark distribution...
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Hirotsugu Fujii26/04/2023, 15:05
For studying small-x gluon saturation in forward dijet production in high-
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energy dilute-dense collisions, the improved TMD (ITMD) factorization formula was recently proposed, which contains the leading-twist TMD factorization formula relevant for small gluon’s transverse momentum kt, but also incorporates an all-order resummation of kinematical twists, resulting in a proper matching to... -
Jihye Song (Pusan National University)26/04/2023, 15:05
Hadronic resonances are effective tools for studying the hadronic phase in ultrarelativistic heavy-ion collisions. In fact, their lifetime is comparable to that of the hadronic phase, and resonances are sensitive to effects such as rescattering and regeneration processes, which might affect the resonance yields and shape of the transverse momentum spectra. These processes can be studied...
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Tom Melia (Kavli IPMU)26/04/2023, 15:50
Despite being the overwhelming majority of events produced in hadron or heavy ion collisions, minimum bias events do not enjoy a robust first-principles theoretical description as their dynamics are dominated by low-energy quantum chromodynamics. I will present a novel expansion scheme of the cross section for minimum bias events that exploits an ergodic hypothesis for particles in the events,...
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Gaohan Yang (South China Normal University)26/04/2023, 15:50
Measurements of heavy quarkonium in heavy-ion collisions provide a powerful tool to study the properties of the Quark-Gluon Plasma (QGP). Due to the color screening effect, the dissociation of heavy quarkonium was proposed as a direct signature of the QGP formation. Compared to charmonia, bottomonia are cleaner probes because of negligible regeneration contribution at the top RHIC energy....
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Yuki Fujimoto (University of Washington)26/04/2023, 15:50
We shed a light on the nature of matter at extremely high baryon density and contrast it to hot QCD matter by using the trace anomaly as a measure of conformality. We discuss an interpretation that a peak in the sound velocity in high-density matter, as suggested by the neutron-star observational data, signifies strongly-correlated conformal matter. The normalized trace anomaly is a...
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Soohwan Lee (Korea University (KR))26/04/2023, 16:15
The information on the quarkonium production in heavy ion collisions is important to probe the heavy-quark dynamic in the quark-gluon plasma (QGP). The suppression of quarkonia production is particularly interesting since it comprises different in-medium effects such as color screening or recombination. But due to the inclusiveness of the nuclear modification factor used to quantify the...
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Dr Shigehiro Yasui (Keio Univ.)26/04/2023, 16:15
We discuss the QCD phase diagram under the effects of heavy quarks and a magnetic field. The effect of the heavy-quark impurity is significantly enhanced by the quantum many-body effect called the QCD Kondo effect within a mean-field theory. Solving the gap equation, we find that the QCD Kondo condensate emerges due to the formations of a pairing between a light quark and a heavy quark. We...
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Shu Lin26/04/2023, 16:15
The global spin polarization of Lambda hyperon in heavy ion collisions has been well described by spin-vorticity coupling, serving as an evidence for creation of rapid spinning quark-gluon plasma. However the same picture fails to explain the measurement of local spin polarization. It has been realized recently that shear stress also couples to spin polarization, and phenomenologial studies...
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Dr Lijia Jiang (Northwest University)26/04/2023, 16:40
At RHIC, a fireball forms in the Au-Au collision and rapidly cools during expansion, inside which the QCD matter undergoes a phase transition from quark-gluon-plasma to the hadronic phase. The phase transition signals are expected to be observed via the measurements of fluctuations of conserved charges such as baryon numbers [1]. As the realistic fireball is a temporally fast evolving and...
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Dr Xiaozhi Bai (University of Science and Technology of China (USTC))26/04/2023, 16:40
Charmonia are excellent probes of deconfinement in heavy-ion collisions. Due to different binding energies between J/$\psi$ and $\psi$(2S),the hot nuclear matter effects have different impact on the production yields of the ground and excited states. The measurements of the J/$\psi$ and $\psi$(2S) in the same collision system will give an insight to the charmonium production mechanisms in...
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Hitoshi Baba (University of Tokyo (JP))26/04/2023, 16:40
A Large Ion Collider Experiment (ALICE) is an experiment at the Large Hadron Collider (LHC) which aims to understand the most basic properties of Quantum Chromodynamics (QCD) by observing Quark-Gluon Plasma (QGP) created at the center of relativistic heavy-ion collisions. The ALICE detector has been largely upgraded during the LHC Long Shutdown LS2 to become capable of collecting Pb-Pb...
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Feng-lei Liu26/04/2023, 17:05
We show for the first time that heavy flavor quenching and flow can be utilized to probe the equation of state (EoS) of quark-gluon plasma (QGP) produced in relativistic heavy-ion collisions. Based on our quasi-particle linear Boltzmann transport (QLBT) model that is coupled to a (3+1)-dimensional viscous hydrodynamic simulation of the QGP and a hybrid fragmentation-coalescence approach for...
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Dr Dongdong Hu (University of Science and Technology of China)26/04/2023, 17:05
The external-target experiment (CEE) is the first large-scale nuclear physics experimental device by China to operate in the fixed-target mode with an energy of ∼ 1 GeV. The purpose of the CEE is to study the properties of dense nuclear matter. CEE uses a multi-gap resistive plate chamber (MRPC) as its internal time-of-flight (iTOF) detector for the identification of final-state particles. An...
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Dr Mamiya Kawaguchi (University of Chinese Academy of Sciences)26/04/2023, 17:05
Several previous studies imply that the quark anomalous magnetic moment (AMM) is dynamically generated through the spontaneous chiral symmetry breaking in the low energy QCD. Even though the exact form of the quark AMM still remains unclear, the AMM would be an essential ingredient for quark matter properties and QCD phase diagram under external magnetic field.
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In this talk, I will discuss... -
Dr Yilun Du (Shandong Institute of Advanced Technology)27/04/2023, 09:20Oral
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Dr Hongxi Xing (South China Normal University)27/04/2023, 10:00Oral
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Li Yan (Fudan University)27/04/2023, 11:00Oral
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Emiko Hiyama27/04/2023, 11:40Oral
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Takashi Hachiya (Nara Women's University (JP))27/04/2023, 13:50Oral
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Sanghoon Lim (Pusan National university)27/04/2023, 14:15Oral
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Masakiyo Kitazawa27/04/2023, 14:40Oral
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27/04/2023, 15:05
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Chiho Nonaka27/04/2023, 15:15
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