-
Thomas Hemmick03/09/2023, 09:00Oral
-
Raghav Kunnawalkam Elayavalli (Vanderbilt University)03/09/2023, 09:45Oral
-
Prof. Hanna Zbroszczyk (Warsaw University of Technology (PL))03/09/2023, 11:00Oral
-
Lijuan Ruan03/09/2023, 11:30Oral
-
Thomas Schaefer03/09/2023, 12:00Oral
-
Enrico Scomparin (INFN Torino (IT))03/09/2023, 14:00Oral
-
Prof. Daniel Tapia Takaki (University of Kansas)03/09/2023, 14:45Oral
-
Elke Aschenauer03/09/2023, 15:30Oral
-
04/09/2023, 08:45
-
David Gross (KITP/UCSB)04/09/2023, 09:15Oral
-
Ionut Cristian Arsene (University of Oslo (NO))04/09/2023, 10:30Oral
-
Aaron Angerami (Lawrence Livermore Nat. Laboratory (US))04/09/2023, 11:00Oral
-
Austin Alan Baty (Rice University (US))04/09/2023, 11:25Oral
-
John Matthew Durham (Los Alamos National Laboratory)04/09/2023, 11:50Oral
-
Simon Spies (Johann-Wolfgang-Goethe Univ. (DE))04/09/2023, 12:15Oral
-
Rosi Reed04/09/2023, 14:00Oral
-
Christine Nattrass (University of Tennessee (US))04/09/2023, 14:30Oral
-
Edward O'Brien (Brookhaven National Lab)04/09/2023, 14:50Oral
-
Piotr Podlaski (University of Warsaw (PL))04/09/2023, 15:10Oral
-
Attila Pasztor (Eötvös University)04/09/2023, 16:00Oral
-
Tyler Gorda (TU Darmstadt)04/09/2023, 16:30Oral
-
James Mulligan (University of California, Berkeley (US))04/09/2023, 17:00Oral
-
Geraldine Cochran (Rutgers University)04/09/2023, 17:30Oral
-
Zuowen Liu05/09/2023, 08:30
Directed and elliptic flow ($v_{1}$, $v_{2}$) are sensitive to the dynamics of heavy-ion collisions at the early stage of the system evolution and the equation of state (EoS) of the medium. The $v_1$ slope ($dv_1/dy$) at mid-rapidity of net-baryons is expected to be sensitive to the first-order phase transition. Also, triangular flow ($v_3$) provides valuable information on the initial...
Go to contribution page -
Xingrui Gou05/09/2023, 08:30
The observation of hyperon polarization has revealed the existence of large vorticities in the medium created by heavy-ion collisions. Global polarization indicates vorticities perpendicular to the reaction plane due to the system's orbital angular momentum. The difference of global polarization between $\Lambda$ and $\bar{\Lambda}$ hyperon can provide essential insights into the late-stage...
Go to contribution page -
Prof. Krishna Rajagopal (Massachusetts Inst. of Technology (US))05/09/2023, 08:30
Quark-gluon plasma, which is a strongly coupled liquid at its natural length scales, must at the same time feature weakly coupled quark and gluon quasiparticles that appear only in hard processes that can resolve its short-length structure. In particular, high-energy partons in a jet shower can scatter off, and kick, the quark and gluon quasiparticles within a droplet of QGP when these Moliere...
Go to contribution page -
Dylan Neff05/09/2023, 08:30
Higher-order cumulants ($C_n$) of net-baryon distributions are sensitive to the nature of the QCD phase transition. Recent lattice QCD calculations [1] suggest a negative $C_5/C_1$ and $C_6/C_2$ in the crossover regime at small baryon chemical potential ($\mu_B \leq$ 110 MeV). In addition, lattice QCD predicts a special ordering of cumulant ratios for systems of thermalized QGP [2]: $C_3/C_1 >...
Go to contribution page -
Xiaozhi Bai (University of Science and Technology of China (USTC))05/09/2023, 08:30
Charmonia have long been recognized as a valuable probe of the nuclear matter in extreme conditions, such as the strongly interacting medium created in heavy-ion collisions and known as quark-gluon plasma (QGP). At LHC energies, the regeneration process due to the abundantly produced charm quarks, was found to considerably affect measured charmonium observables. Comprehensive production...
Go to contribution page -
Maneesha Sushama Pradeep05/09/2023, 08:50
It has long been understood that non-monotonic variation of non-Gaussian cumulants of particle multiplicities as a function of decreasing collision energy and, hence, increasing baryon chemical potential $\mu_B$ can yield tell-tale signatures of the presence of a possible critical point in the QCD phase diagram. In this talk, we shall present quantitative estimates for the magnitude and...
Go to contribution page -
Andi Mankolli (Vanderbilt University (US))05/09/2023, 08:50
Most of our experimentally-driven knowledge about the early stages of a heavy-ion collision comes from analysis of measurements made near mid-rapidity. However, much information about the dynamics is encoded in rapidity-dependent behavior, and there exists a large amount of experimental data available to constrain this rapidity dependence. To leverage this information, we perform a systematic...
Go to contribution page -
Dr Yayun He (South China Normal University)05/09/2023, 08:50
Jet energy loss and transverse momentum broadening are controlled by the jet transport coefficient $\hat{q}$ in the QGP medium. Specifically, jet energy loss correlates with jet propagation length, while transverse momentum asymmetry caused by the gradient of $\hat{q}$ depends on the initial transverse coordinates. We study both the longitudinal and transverse jet tomography in dijet events by...
Go to contribution page -
Chunzheng Wang (Fudan University (CN))05/09/2023, 08:50
The interplay of the chiral anomaly and the strong magnetic or vortical field created in the off-central heavy-ion collisions can give rise to anomalous chiral effects in the quark--gluon plasma. These include the Chiral Magnetic Effect (CME), the Chiral Magnetic Wave (CMW) and the Chiral Vortical Effect (CVE). The study of these novel phenomena is of fundamental significance since they may...
Go to contribution page -
Tzu-An Sheng (Massachusetts Institute of Technology)05/09/2023, 08:50
Heavy quarks are one of the most powerful probes to study the properties of quark-gluon plasma. We present new results on nuclear modification factors of $\mathrm{B}_\mathrm{s}^{0}$ and $\mathrm{B}^{+}$ mesons, using proton-proton (pp) and lead-lead (PbPb) data recorded with the CMS detector in 2017 and 2018, respectively. The measured B meson nuclear modification factors over an extended...
Go to contribution page -
Barnabas Porfy (Wigner Research Centre for Physics (Wigner RCP) (HU))05/09/2023, 09:10
The recent measurements of femtoscopic correlations at NA61/SHINE, using small systems, unravel that the shape of the particle emitting source is not Gaussian. The measurements are based on alpha-stable symmetric L\'evy sources, and we discuss the average pair transverse mass dependence of the source parameters. One of the parameters, the L\'evy exponent $\alpha$, is of particularly...
Go to contribution page -
Ian James Moult05/09/2023, 09:10
In this talk we use the recently introduced energy correlator framework for jet substructure in heavy-ion collisions to show how the radiation pattern of heavy quarks is modified by the presence of the QGP. We present an analytical calculation of the medium-modified 2-point energy correlator of a heavy quark jet determining how the dead-cone is populated by medium-induced radiation. We...
Go to contribution page -
473. Probe parton propagation in heavy-ion collisions with ALICE heavy-flavour measurements (remote)Ravindra Singh (Indian Institute of Technology Indore (IN))05/09/2023, 09:10
Heavy quarks (charm and beauty) are valuable probes for investigating the properties of the quark-gluon plasma (QGP) formed in ultra-relativistic heavy-ion collisions, as they are mainly produced through hard-scattering processes prior to the formation of the QGP, and their number is conserved during the subsequent QGP evolution. Measurements of the nuclear modification factor $R_{\rm AA}$ of...
Go to contribution page -
Lipei Du (McGill University)05/09/2023, 09:10
Using a (3+1)-dimensional hybrid framework with parametric initial conditions, we study the rapidity-dependent directed flow $v_1(y)$ of identified particles, including pions, kaons, protons, and lambdas in heavy-ion collisions. Cases involving Au+Au collisions are considered, performed at $\sqrt{s_{\rm NN}}$ ranging from 7.7 to 200 GeV. The dynamics in the beam direction is constrained using...
Go to contribution page -
Willian Matioli Serenone (Universidade de São Paulo)05/09/2023, 09:10
Hydrodynamics provides quantitative descriptions of various flow measurements in heavy-ion collisions, suggesting the strongly-coupled nature of the hot QCD matter. A ubiquitous phenomenon in fluid dynamics is the formation of vortex rings. In heavy-ion collisions, different conditions can give rise to toroidal vortex structure in the QGP medium, such as the medium's response to jet...
Go to contribution page -
Anne Marie Sickles (Univ. Illinois at Urbana Champaign (US))05/09/2023, 09:30
The suppression of jets in heavy-ion collisions can provide detailed information about the hot, dense plasma formed in these collisions at the LHC. Jet quenching in heavy-ion collisions is expected to depend on the mass of the fragmenting parton. For light partons, energy loss via gluon bremsstrahlung is expected to dominate, while for heavy-quark-initiated jets, collisional energy loss may...
Go to contribution page -
Prof. Wei-jie Fu (Dalian University of Technology)05/09/2023, 09:30
Calculations of baryon number fluctuations up to the sixth order at finite temperature and density in Ref.[1] have been extended to regime of high baryon chemical potentials with 400 MeV $\leq \mu_B\leq 700$ MeV. A peak structure is found for the dependence of the kurtosis of baryon number distributions, i.e., $R^{B}_{42}=\chi^{B}_{4}/\chi^{B}_{2}$, on the collision energy in a range of 3 GeV...
Go to contribution page -
An Gu (Purdue University (US))05/09/2023, 09:30
The $f_0(980)$ is a candidate exotic hadron, first observed by $\pi\pi$ scattering in the 1970’s. Its configuration still remains controversial— it can be a normal $s\bar{s}$ meson, a tetraquark $s\bar{s}q\bar{q}$ state, a $q\bar{q}g$ hybrid, or a $\mathrm{K}\bar{\mathrm{K}}$ molecule. Relativistic heavy ion collisions are in a unique position to identify the $f_0(980)$ quark content by the...
Go to contribution page -
Soumik Chandra (Purdue University (US))05/09/2023, 09:30
The study of charm quark hadrons is an important probe to the processes of hadronization of heavy quarks. More specifically, we present results on the production of $\Lambda_\mathrm{c}$ baryon, the nuclear modification factors ($R_\mathrm{AA}$), and the $\Lambda_\mathrm{c}/\mathrm{D}^{0}$ yield ratios at $\sqrt{s_{_{\mathrm{NN}}}} = 5.02$~TeV in proton-proton (pp) collisions and in different...
Go to contribution page -
Baoshan Xi (Fudan University)05/09/2023, 09:30
The global spin alignment of particles produced in heavy-ion collisions can reveal valuable information about the strong force field and the properties of the quark-gluon plasma. The STAR collaboration recently observed a large global spin alignment of $\phi$-mesons in Au+Au collisions using the data from the first phase of the RHIC Beam Energy Scan program (BES-I) [1]. This cannot be...
Go to contribution page -
Nick Abboud (University of Illinois at Urbana-Champaign)05/09/2023, 09:50
Over the past decade, considerable research effort has focused on investigating macroscopic consequences of anomalies in quantum field theories. In particular, chiral matter is expected to exhibit novel transport phenomena arising from the interplay between quantum anomalies and electromagnetic and vortical fields [1]. In order to study these effects in fluid systems like the quark-gluon...
Go to contribution page -
Jarkko Peuron (University of Jyväskylä)05/09/2023, 09:50
We compute the heavy quark momentum diffusion coefficient $\kappa$ using QCD effective kinetic theory for a system going through bottom-up isotropization until approximate hydrodynamization. This transport coefficient describes heavy quark momentum diffusion in the quark-gluon plasma and is used in many phenomenological frameworks, e.g. in the open quantum systems approach. Our extracted...
Go to contribution page -
Mauricio Hippert Teixeira (University of Illinois at Urbana-Champaign)05/09/2023, 09:50
Predictions for the QCD critical point are made using Bayesian inference techniques within the holographic gauge/gravity correspondence. For that, we employ a Einstein-Maxwell-Dilaton (EMD) model capable of reproducing the latest lattice QCD results at zero and finite baryon density, known to predict a high-density critical endpoint. For the first time, we numerically find the posterior...
Go to contribution page -
Mayank Singh (University of Minnesota)05/09/2023, 09:50
Intermediate pT jets (minijets) are created by initial hard scatterings in heavy-ion collision experiments. They can constitute a significant portion of the particle multiplicity but do not lend themselves to hydrodynamic treatment as their transverse momenta are larger than the typical saturation scale of the bulk matter.Their orientation is independent of the underlying event and they can...
Go to contribution page -
Pin-Chun Chou (Massachusetts Inst. of Technology (US))05/09/2023, 09:50
Extensive studies of dijet momentum balance, inclusive jet shapes, and photon-tagged jet fragmentation functions have revealed a significant contribution of low transverse momentum ($p_\mathrm{T}$) particles to the energy momentum balance of dijet and photon-jets. Effects such as medium-induced radiation and medium response could contribute to the enhancement of low-$p_\mathrm{T}$ particles....
Go to contribution page -
Min He (Nanjing University of Science & Technology)05/09/2023, 10:10
The hadro-chemistry of bottom quarks produced in hadronic collisions encodes valuable information on the mechanism of color-neutralization in these reactions. We first compute the chemistry of bottom-hadrons in high-energy $pp$ collisions employing statistical hadronization with a largely augmented set of states beyond the currently measured spectrum. This enables a comprehensive prediction of...
Go to contribution page -
Piotr Bozek (AGH University of Science and Technology)05/09/2023, 10:10
The early dynamics in heavy-ion collisions involves a rapid, far from equilibrium evolution. This early pre-equilibrium stage of the dynamics can be modeled using kinetic equations. The effect of this pre-equilibrium stage on final observables derived from transverse momenta of emitted particles is negligible. Therefore, the kinetic equations in the relaxation time approximation for a...
Go to contribution page -
Molly Taylor (Massachusetts Inst. of Technology (US))05/09/2023, 10:10
Previous analyses have shown a narrowing effect in the inclusive jet substructure. While this narrowing effect could be a result of jet quenching, it could also be caused due to a selection bias by which very quenched and broader jets are filtered out from the considered jet transverse momentum window. Photon-tagged jets, which correspond to a quark-enriched sample, can significantly reduce...
Go to contribution page -
ZHIWAN XU05/09/2023, 10:10
Effects from quark chirality in heavy-ion collisions probe the topological sector of Quantum Chromodynamics, where parity and charge-parity symmetries are violated locally in strong interactions. However, the experimental observables for the chiral magnetic/vortical effect (CME/CVE) are dominated by elliptic flow and nonflow backgrounds. Recent STAR isobar data revealed a substantial...
Go to contribution page -
Dr Roman Poberezhnyuk (Bogolubov Institute for Theoretical Physics)05/09/2023, 10:10
Subensemble Acceptance Method (SAM) [1,2] is an essential link between measured event-by-event fluctuations and their grand canonical theoretical predictions such as lattice QCD. The method allows quantifying the global conservation law effects in fluctuations. In its basic formulation, SAM requires a sufficiently large system such as created in central nucleus-nucleus collisions and...
Go to contribution page -
Clemens Werthmann (University of Wroclaw)05/09/2023, 11:00
We simulate the space-time dynamics of high-energy collisions based on a microscopic kinetic description, in order to determine the range of applicability of an effective description in relativistic viscous hydrodynamics [1,2]. We find that hydrodynamics provides a quantitatively accurate description of collective flow when the average inverse Reynolds number $\mathrm{Re}^{−1}$ is sufficiently...
Go to contribution page -
Krista Lizbeth Smith (Los Alamos National Laboratory (US))05/09/2023, 11:00
The PHENIX experiment at RHIC has a unique large rapidity coverage (1.2$<|\eta|<$2.2) for heavy flavor studies in heavy ion collisions. This kinematic region has a smaller particle density and may undergo different nuclear effects before and after the hard process when compared to mid-rapidity production. The latest PHENIX runs contains a large data set which allows, for the first time, the...
Go to contribution page -
André Cordeiro05/09/2023, 11:00
While experimental studies on jet quenching have achieved a large sophistication, the theoretical description of this phenomenon still misses some important points. One of them is the interplay of vacuum-like emissions, usually formulated in momentum space, with the medium induced ones that demand an interface with a space-time picture of the medium and thus must be formulated in position...
Go to contribution page -
Yi Fang05/09/2023, 11:00
One main motivation of the Beam Energy Scan (BES) program at RHIC is to search for the QCD critical point and the onset of deconfinement. Strangeness production has been suggested as a sensitive probe to the early dynamics of the deconfined matter created in heavy-ion collisions. Ratios of particle yields involving strange particles are often utilized to study various properties of the nuclear...
Go to contribution page -
Xiaojun Yao (University of Washington)05/09/2023, 11:00
We report on progress in understanding thermalization in QCD at the full quantum level. Previous studies of thermalization of highly excited states in QCD, as they arise in heavy ion collisions, have either involved the (semi-)classical evolution of highly occupied gluon states or kinetic theory. Both approaches omit or approximate essential properties of quantum mechanical systems including...
Go to contribution page -
Rishabh Sharma (Indian Institute of Science Education and Research (IISER) Tirupati)05/09/2023, 11:20
The formation of light nuclei in heavy-ion collisions can be explained by two models: the thermal model and the coalescence model. The thermal model proposes that light nuclei originate from a thermal source where they are in equilibrium with other particles in the fireball. However, due to their low binding energies, the formed nuclei are unlikely to survive the high-temperature conditions of...
Go to contribution page -
Hannah Bossi (Massachusetts Inst. of Technology (US))05/09/2023, 11:20
The study of jet substructure in heavy-ion collisions provides multiple tools for incisive exploration of jet-medium interactions and the mechanisms underlying jet quenching. Some results, however, remain disjoint: the jet mass and jet angularities, including girth and thrust, are strongly-correlated observables that have given seemingly conflicted answers on the angular quenching of jets...
Go to contribution page -
Jasmine Therese Brewer (CERN)05/09/2023, 11:20
We discuss the evolution of initial momentum anisotropy in the early-stage quark-gluon plasma. We use kinetic theory to study the far-from-equilibrium evolution of an expanding plasma with an anisotropic momentum-space distribution. We identify slow and fast degrees of freedom in the far-from-equilibrium plasma from the evolution of moments of this distribution. At late times, the slow modes...
Go to contribution page -
Yuan Su (University of Science and Technology of China)05/09/2023, 11:20
Heavy flavor quarks (charm and bottom), produced in the early stages of heavy-ion collisions, serve as excellent probes to study the properties of the Quark-Gluon Plasma (QGP). When traversing the medium, charm quarks suffer from `jet quenching' thanks to the interactions with the QGP. It can manifest as degradation of charm quark energy and modifications to the fragmentation pattern, both of...
Go to contribution page -
Jing Wang (CERN)05/09/2023, 11:20
The pseudorapidity distributions and anisotropic flow coefficients of charged particles produced in heavy ion collisions are key observables that characterize the initial conditions and subsequent hydrodynamic evolution of the quark-gluon plasma. Recent LHC Run 3 lead-lead (PbPb) data collected at a center-of-mass per nucleon pair of $\sqrt{s_{_{\mathrm{NN}}}} = 5.36$~TeV allow the study of...
Go to contribution page -
Yan Wang (University of Science and Technology of China)05/09/2023, 11:40
Quarkonia and open heavy-flavor hadrons are important probes to study the properties of the quark-gluon plasma (QGP) created in heavy-ion collisions. Heavy quarks (charm and bottom) are primarily generated at initial hard platonic scatterings and undergo the whole QGP evolution. Therefore, they are excellent probes of the QGP properties.Production of quarkonia depends on the dissociation and...
Go to contribution page -
Sonali Padhan (IIT- Indian Institute of Technology (IN))05/09/2023, 11:40
The investigation of the quark content of hadrons has been a major goal of non-perturbative strong interaction physics. In the last decade, several resonances in the mass range 1000-2000 MeV/$c^2$ have emerged that cannot be explained by the quark model. The internal structure of exotic resonances such as $\rm f_0$, $\rm f_1$, and $\rm f_2$ is currently unknown. Different scenarios are...
Go to contribution page -
Shengquan Tuo (Vanderbilt University (US))05/09/2023, 11:40
This talk presents a measurement of higher order flow harmonics with order number up to 10 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 -
Nadine Alice Gruenwald (Heidelberg University (DE))05/09/2023, 11:40
This talk presents new measurements of inclusive jet yield suppression and correlation with event-plane orientation to elucidate the kinematic and path-length dependence of jet energy loss due to quenching. We report measurements of the inclusive charged-particle jet yield in central Pb--Pb collisions, with the large uncorrelated background mitigated using a novel event mixing technique. This...
Go to contribution page -
Stephan Ochsenfeld (Bielefeld University)05/09/2023, 11:40
Viscous hydrodynamics serves as a successful mesoscopic description of the QGP produced in relativistic heavy-ion collisions. In order to investigate, how such an effective description emerges from the underlying microscopic dynamics we calculate the non-hydrodynamic and hydrodynamic modes of linear response in the sound channel from a first-principle calculation in kinetic theory. We do this...
Go to contribution page -
Joseph Kapusta05/09/2023, 12:00
Measurements of the dynamical correlations between neutral and charged kaons in central Pb-Pb collisions at $\sqrt{s_{NN}} = 2.76$ TeV by the ALICE Collaboration display anomalous behavior relative to conventional heavy-ion collision simulators. We consider other conventional statistical models, none of which can reproduce the magnitude and centrality dependence of the correlations. The data...
Go to contribution page -
Han Gao05/09/2023, 12:00
The success of thermal models in extracting freeze-out parameters from particle yields near midrapidity is well known. However, it is essential to investigate their performance with rapidity-dependent measurements at low collision energies, where boost-invariance is expected to be strongly violated. In this study, we calibrate a (3+1)-dimensional multistage hydrodynamic framework using...
Go to contribution page -
Subikash Choudhury (Department of Atomic Energy (IN))05/09/2023, 12:00
Measurements in pp and p--Pb collisions, so-called small systems, besides serving as baseline for studying vacuum production and cold-nuclear matter effects, respectively, have recently shown intriguing features. In particular, measurements in high-multiplicity events have revealed striking similarities with heavy-ion collisions, where the formation of a quark-gluon plasma is expected. One of...
Go to contribution page -
Timothy Thomas Rinn (Brookhaven National Laboratory)05/09/2023, 12:00
sPHENIX is a new collider detector at RHIC designed for pioneering studies of the Quark-Gluon Plasma with high-p$_T$ jet and heavy flavor probes. The jet physics program particularly relies on the sPHENIX calorimeter system, which consists of large-acceptance, hermetic electromagnetic and hadronic sections designed for high-resolution measurements of photons, electrons, hadrons, and jets....
Go to contribution page -
Gregoire Pihan05/09/2023, 12:00
It is a fundamental question to understand what is the effective carrier of conserved quantum charges inside a proton at high energy. The net baryon and electric charge rapidity distributions in relativistic heavy-ion collisions can elucidate how different
Go to contribution page
conserved charges are transported along the longitudinal direction during the collision. Recent preliminary measurements in isobar... -
Paul Romatschke05/09/2023, 12:20
Wouldn't it be nice to solve large N QCD analytically? While QCD is hard, it is fairly easy to solve scalar field theories with many components, such as the O(N) model in the large N limit. Traditional wisdom has it that such theories are ill defined because they have the wrong beta function, possess a Landau pole, and are quantum trivial for N=1. In this talk, I throw out conventional wisdom,...
Go to contribution page -
Dr Neelima Agrawal (Universita e INFN, Bologna (IT))05/09/2023, 12:20
Hadronic resonances have typical lifetimes that are comparable to that of the hadron gas phase created in the late stages of high-energy nuclear collisions. Therefore, a significant fraction of resonances decays inside a high-density medium and their decay daughters may rescatter with other hadrons destroying their initial kinematic correlations. A competing effect is resonance regeneration...
Go to contribution page -
Chenxi Gu (Centre National de la Recherche Scientifique (FR))05/09/2023, 12:20
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 visi-
ble 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 detector
is... -
Chathuranga Sirimanna05/09/2023, 12:20
Prompt photons are created in the early stages of heavy ion collisions and traverse the QGP medium without any interaction. Therefore, photon-triggered jets can be used to study the jet quenching in the QGP medium. In this work, photon-triggered jets are studied through different jet and jet substructure observables for different collision systems and energies using the JETSCAPE framework....
Go to contribution page -
Rupam Samanta (AGH University of Science and Technology, Krakow, Poland and Institute of Theoretical Physics, CEA, Paris-Saclay University, Gif-sur-Yvette, France)05/09/2023, 12:20
We report the first direct evidence of thermalization of the Quark-Gluon Plasma (QGP) formed in ultra-relativistic heavy-ion collision, by studying the fluctuation of mean transverse momentum per particle ($\langle p_t \rangle$) in ultra-central Pb+Pb collision. The recent experimental data from the ATLAS collaboration at the Large Hadron Collider (LHC), provides measurement of variance of...
Go to contribution page -
Blair Daniel Seidlitz (Columbia University (US))05/09/2023, 12:40
This talk presents a measurement of longitudinal decorrelation in $pp$ collisions with ATLAS. The deposited energy in the transverse $(x,y)$ plane is expected to vary, depending on the longitudinal $(z)$ slice examined, which is correlated with the rapidity of the produced particles. Thus, particles from different rapidity slices will have flow vectors that differ in magnitude and orientation...
Go to contribution page -
Cesar Luiz Da Silva (Los Alamos National Laboratory (US))05/09/2023, 12:40
Modifications of quarkonia production in hadronic collisions provide an im-
Go to contribution page
portant experimental observable that sheds light on the heavy quark interaction
with the nuclear medium. In small collision systems, quarkonia can suffer from
a combination of initial and final state effects such as shadowing and comover
breakup, and possible effects from a deconfined medium. The excited... -
Xin An (National Center for Nuclear Research)05/09/2023, 12:40
We consider non-equilibrium evolution of non-Gaussian fluctuations crucial for the QCD critical point search in heavy-ion collision experiments. We rely on the hierarchy of relaxation time scales, which emerges in the hydrodynamic regime near the critical point. We focus on the slowest modes which are responsible for observable signatures of the critical point. We derive evolution equations...
Go to contribution page -
João Barata05/09/2023, 12:40
We study the time evolution of the density matrix of a high energy quark in the presence of a dense QCD background that is modeled as a stochastic Gaussian color field. At late times, we find that only the color singlet component of the quark’s reduced density matrix survives the in-medium evolution and that the density matrix becomes asymptotically diagonal in both transverse position and...
Go to contribution page -
Francesca Ercolessi (Universita e INFN, Bologna (IT))05/09/2023, 12:40
Measurements of light flavour particle production in small collision systems at the LHC energies have shown the onset of features (e.g. radial flow) that resemble what is typically observed in nucleus-nucleus collisions and attributed to the formation of a strongly interacting medium.
Go to contribution page
By performing more differential studies and analysing smaller fractions of the visible cross section the... -
Cheuk Ping Wong (Brookhaven National Laboratory)05/09/2023, 13:00
Particle correlations are a powerful tool to study the properties of the bulk nu-
Go to contribution page
clear matter produced in relativistic heavy ion collisions. The momentum cor-
relations between identical particles originating from the same particle-emitting
source, referred to as the Bose-Einstein correlations, measure scales that are
related to the geometrical size of the source. The two-particle... -
Mario Ciacco (Politecnico di Torino and INFN Torino (IT))05/09/2023, 13:00
Deciphering the process of hadronization has long been a formidable challenge, in part due to its non-perturbative nature. Over the years, various phenomenological models have emerged, all attempting to unravel the complexity of hadron production. Despite their different theoretical foundations, many of these models successfully account for the average yield of hadrons. This has spurred the...
Go to contribution page -
Rainer Fries (Texas A&M University)05/09/2023, 13:00
The proper treatment of hadronic resonances plays an important role for many aspects of heavy ion collisions. We expect this to be the case also for hadronization, due to the large degeneracies of excited states, and the abundant production of hadrons from their decays. We show how a comprehensive treatment of excited meson states can be incorporated into quark recombination, and in extension,...
Go to contribution page -
Cameron Dean (Massachusetts Inst. of Technology (US))05/09/2023, 13:00
Major high-energy nuclear and particle experiments are challenged by the processing of large volumes of high precision data generated by sophisticated detectors in high-rate collisions, e.g., experiments at RHIC and LHC. To address this challenge, state-of-the-art real-time AI technology is being developed using modern deep neural networks and AI-centric hardware innovations. Supported by the...
Go to contribution page -
Daniel Firak05/09/2023, 13:00
PHENIX observed a 20\% suppression in the production of high $p_T$ neutral pions
Go to contribution page
in the most central (0-5\%) $d+$Au collisions at 200 GeV. Through the simultaneous measurement of high $p_T$ direct photons ($\gamma^{dir}$) and $\pi^0$ production for event samples selected by event activity, the final state effects could be disentangled from cold-nuclear-matter effects and event-selection... -
Nicki Mullins05/09/2023, 14:50
The study of thermal fluctuations in relativistic hydrodynamics is essential for understanding physics near the expected critical endpoint in the QCD phase diagram. Furthermore, the incorporation of stochastic fluctuations may be important for the modeling of hydrodynamics in small systems such as proton-proton and proton-nucleus collisions. We present a new general formalism for introducing...
Go to contribution page -
Afnan Shatat (Université Paris-Saclay (FR))05/09/2023, 14:50
Photonuclear reactions are induced by the strong electromagnetic field generated by ultrarelativistic heavy-ion collisions. These processes have been extensively studied in ultraperipheral collisions, in which the impact parameter is larger than twice the nuclear radius. In recent years, the observation of coherent J/$\psi$ photoproduction has been claimed in nucleus--nucleus (A--A) collisions...
Go to contribution page -
Szabolcs Istvan Borsanyi05/09/2023, 14:50
Sixth and higher order fluctuations of the baryon number are linked
Go to contribution page
to signals of criticality in heavy ion collisions. The grand canonical
result for these can be obtained from lattice simulations. The
extrapolation to the continuum limit is essential for phenomenologically
relevant results. In fact, higher order coefficients of the Taylor
expansion of the QCD free energy appear to be... -
479. Investigating the early magnetic field of QGP via heavy-flavour polarisation studies with ALICELuca Micheletti (CERN)05/09/2023, 14:50
Heavy quarks, i.e. charm and beauty, are produced at the initial stage of heavy-ion collisions, on a time scale shorter than the medium formation time, and are sensitive to the large initial magnetic field produced perpendicular to the reaction plane (defined by the impact parameter direction and beam direction) in non-central heavy-ion collisions. In the presence of a large initial magnetic...
Go to contribution page -
Dener De Souza Lemos (University of Illinois at Chicago (US))05/09/2023, 14:50
High-energy jets are produced by the fragmentation of partons (quarks and gluons) that underwent hard scattering in the early stages of a collision. For quite a number of years, jets have been successfully used to probe the properties of the special form of matter, the quark gluon plasma (QGP), formed in high-energy heavy ion collisions. One of the most recognized signatures of the QGP, the...
Go to contribution page -
Dr ismail soudi (Wayne State University)05/09/2023, 15:10
Unpolarized protons can generate transversely polarized quarks or linearly polarized gluons through a distribution known as the Boer-Mulders' function. The fragmentation of similarly polarized partons to unpolarized hadrons is called the Collins' function. Both of these functions include correlations between the spin or polarization and the relative transverse momentum of the incoming parton...
Go to contribution page -
Florian Lindenbauer (TU Wien)05/09/2023, 15:10
We study the hydrodynamization process in the aftermath of ultrarelativistic heavy-ion collisions using effective kinetic theory simulations and different observables. For the pressure ratio $P_T/P_L$, we observe that its late-time evolution becomes universal in units of the kinetic relaxation time for sufficiently large couplings signaling the onset of a hydrodynamical attractor. In contrast,...
Go to contribution page -
Mingrui Zhao (China Institute of Atomic Energy (CN))05/09/2023, 15:10
While the formation of the quark--gluon plasma (QGP) in heavy-ion collisions has been confirmed by characteristic patterns of flow measurements, it remains unclear what is the smallest possible collision system that can generate a similar medium exhibiting partonic collectivity. In this talk, we will present the new preliminary results of anisotropic flow in pp, p--Pb, and Pb--Pb collisions...
Go to contribution page -
Micheal Kahangirwe05/09/2023, 15:10
Our study presents a family of Equations of State (EoS) that enable hydrodynamical simulations at unprecedentedly large baryon chemical potential ($\mu_B$) and finite temperature ($T$), thus helping to constrain the critical point's location by comparing it to experimental data from the Second Beam Energy Scan.
Go to contribution page
In Ref. [1], a family of equations of state was constructed by combining Taylor... -
Prof. Charles Gale05/09/2023, 15:10
Dileptons are an invaluable tool for mapping out the phase diagram of QCD because they grant observational access to the entire space-time history of heavy-ion collisions. We calculate thermal dilepton yields from Au+Au collisions at BES energies -- $\sqrt{s_{NN}}$=7.7, 19.6, 27, 54.4, 62.4, 130, and 200 GeV -- using a realistic (3+1)-dimensional multistage dynamical framework. The underlying...
Go to contribution page -
Chun Shen (Wayne State University)05/09/2023, 15:30
This talk will present the Bayesian inference approach for quantitatively characterizing the 3D dynamics of heavy-ion collisions and the Quark-Gluon Plasma (QGP) properties in the RHIC Beam Energy Scan (BES) program. To model the dynamics of the collisions from 7.7 to 200 GeV, we employ a (3+1)D dynamical initialization model coupled with the relativistic viscous hydrodynamics + hadronic...
Go to contribution page -
Adam Matyja (Polish Academy of Sciences (PL))05/09/2023, 15:30
Incoherent J/$\psi$ photoproduction is sensitive to fluctuations of the gluonic structure of the target. Thus, the measurement of $\rm{J/\psi}$ photoproduction off the colliding hadron sheds light on the initial state of QCD and provides important constraints on the initial conditions used in hydrodynamical models of heavy ion collisions. In this talk, we present the first measurement of the...
Go to contribution page -
Vassu Doomra (Stony Brook University)05/09/2023, 15:30
Photons provide snapshots of the evolution of relativistic heavy-ion collisions as they are emitted at all stages and do not interact with the medium strongly. Measurements of low momentum direct photons at PHENIX across different systems, from $p+p$, $p/d/^3$He$+$Au to Au$+$Au have been made possible due to the versatility of RHIC. An excess of direct photons, above prompt photon production...
Go to contribution page -
Kara Mattioli (Centre National de la Recherche Scientifique (FR))05/09/2023, 15:30
The LHCb spectrometer has the unique capability to function as a fixed-
Go to contribution page
target experiment by injecting gas into the LHC beampipe while proton or ion
beams are circulating. The resulting beam+gas collisions cover an unexplored
energy range, intermediate to previous fixed-target experiments and the top
RHIC energy for AA collisions, and allow systems of different size to be stud-
ied. Here... -
Dr Weiyao Ke (Los Alamos National Laboratory)05/09/2023, 15:30
We study cold nuclear matter effects on Drell-Yan production at small and moderate $p_T$ in proton/pion-nucleus collisions using a new transverse-momentum dependent (TMD) factorization framework. Both collisional broadening and medium-induced radiative corrections in the initial state are considered in the soft-collinear effective theory with Glauber gluons (SCET$_{G}$) approach. We...
Go to contribution page -
Sunil Jaiswal (Tata Institute of Fundamental Research)05/09/2023, 15:50
We study the boost-invariant non-conformal Boltzmann equation in the relaxation-time approximation using special moments of the distribution function and investigate how hydrodynamical behavior emerges as the plasma transits from the far-off-equilibrium free-streaming regime to the hydrodynamic regime. The infinite hierarchy of moments can be truncated by keeping only the three lowest moments...
Go to contribution page -
Carolina Arata (Centre National de la Recherche Scientifique (FR))05/09/2023, 15:50
Measurements of direct photons provide valuable information on the properties of the quark-gluon plasma (QGP) because they are colour-neutral and created during all phases of the collision. Sources of photons include initial hard scatterings, Bremsstrahlung and the fragmentation process, jet-medium interactions, and radiation from the medium.
Direct thermal photons, produced by the plasma,...
Go to contribution page -
Raymond Ehlers (University of California Berkeley (US))05/09/2023, 15:50
The JETSCAPE Collaboration reports new studies of jet transport in the QGP using Bayesian Inference, incorporating both hadron and jet inclusive yield suppression data, and jet substructure data. This analysis extends the previously published JETSCAPE Bayesian determination of $\hat{q}$, which was based solely on inclusive hadron suppression data.
JETSCAPE is a modular framework for...
Go to contribution page -
Matthew Harasty (University of California, Davis)05/09/2023, 15:50
Quantum Chromodynamics (QCD), the theory of strong interactions, predicts that at sufficiently high temperature and/or high energy density, normal nuclear matter converts into a deconfined state of quarks and gluons, known as the Quark-Gluon Plasma (QGP). To investigate the phase diagram of the QCD matter, the Relativistic Heavy Ion Collider (RHIC) started the first phase of the Beam Energy...
Go to contribution page -
Jiangyong Jia (Stony Brook University (US))05/09/2023, 15:50
Hydrodynamic simulations of the quark-gluon plasma (QGP) permit us not only to gauge the transport properties of hot QCD matter from data, but also to constrain the conditions that set the stage for the formation of such matter. Recent measurements from RHIC and LHC demonstrate that the QGP initial condition is impacted by the shape and radial structure of the colliding nuclei. Based on a...
Go to contribution page -
Rachel Steinhorst (Massachusetts Institute of Technology)05/09/2023, 16:10
One of the main challenges in the theory of heavy ion collisions is understanding how an initial state of two highly Lorentz-contracted nuclei acquires the features of a hydrodynamic plasma in a characteristic time of 1 fm/c. Arguably, the most successful descriptions of this out-of-equilibrium stage have been established by finding so-called “attractor” solutions in the various (simplified)...
Go to contribution page -
Zvi Citron (Ben-Gurion University of the Negev (IL))05/09/2023, 16:10
We will present the final measurement studying the relationship between the production of hard and soft particles through the correlation of Upsilon meson states (including $\Upsilon$(1S), $\Upsilon$(2S), and $\Upsilon$(3S)) with the inclusive-charged particle yields. The analysis is performed using the full-luminosity ATLAS Run-2 13 TeV $pp$ collision data. A description of the technical...
Go to contribution page -
Daiki Sekihata (University of Tokyo (JP))05/09/2023, 16:10
Electromagnetic probes such as photons and dielectrons (e$^{+}$e$^{-}$ pairs) are a unique tool to study the space-time evolution of the hot and dense matter created in ultra-relativistic heavy-ion collisions. They are produced at all stages of the collision with negligible final-state interactions. At intermediate dielectron invariant mass ($m_{\rm ee} > 1$ GeV/$c^{2}$), thermal radiation...
Go to contribution page -
Dr Chik Him Wong05/09/2023, 16:10
The equation of state of the quark gluon plasma is a key ingredient of heavy ion phenomenology. In addition to the traditional Taylor method, several novel approximation schemes have been proposed with the aim of calculating it at finite baryon density. In order to gain a pragmatic understanding of the limits of these schemes, we compare them to direct results at $\mu >0$, using reweighting...
Go to contribution page -
Masoud Shokri (Goethe University, ITP)05/09/2023, 16:10
We propose a method to find local plane wave solutions to linearized equations of motion of relativistic hydrodynamics in inhomogeneous backgrounds, i.e., when fluid is rigidly moving with nonzero thermal vorticity in equilibrium. Our method is based on extending the conserved currents to the tangent bundle, using Wigner transforms. The Wigner-transformed conserved currents can then be Fourier...
Go to contribution page -
Thomas Boettcher (University of Cincinnati (US))05/09/2023, 16:30
The LHCb detector’s forward geometry provides unprecedented access to
Go to contribution page
the very low regions of Bjorken 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 contribution... -
Bjoern Schenke (Brookhaven National Lab)05/09/2023, 16:30
Employing a dynamical initial state model coupled to (3+1)D viscous relativistic hydrodynamics, we explore the rapidity dependence of anisotropic flow in the Relativistic Heavy-Ion Collider (RHIC) small system scan at 200 GeV center of mass energy. We demonstrate that approximately 50% of the pT-differential triangular flow difference between the measurements by the STAR and PHENIX...
Go to contribution page -
Prof. Gokce Basar (University of North Carolina, Chapel Hill)05/09/2023, 16:30
Determining the existence and the location of the QCD critical point remains a major goal in the heavy-ion collision experiments. A crucial theoretical input for achieving this goal is mapping the QCD equation of state in the presence of baryon chemical potential (mu) which at the moment is limited to small values of mu, away from the critical point. I present a new framework for...
Go to contribution page -
Paolo Parotto05/09/2023, 16:30
The equation of state of Quantum Chromodynamics has been in recent
Go to contribution page
years the focus of intense effort from first principle methods,
mostly lattice simulations, with particular interest to the finite
baryon density regime. Because of the sign problem, various
extrapolation methods have been used to reconstruct bulk properties
of the theory up to as far as $\mu_B/T \simeq 3.5$. However,... -
Yiding Han (Rice University)05/09/2023, 16:30
Dielectrons emitted during the evolution of the hot and dense QCD medium created in relativistic heavy-ion collisions offer an effective way to probe the medium properties, as they do not interact via the strong force. The rate of the dielectron emission is proportional to the medium's electromagnetic spectral function. In the dielectron mass range from $400$ MeV/$c^{2}$ to $800$ MeV/$c^{2}$,...
Go to contribution page -
208. Far-from-equilibrium attractors for massive kinetic theory in the relaxation time approximationHuda Alalawi05/09/2023, 16:50
We investigate whether early and late time attractors for non-conformal kinetic theories exist by computing the time-evolution of a large set of moments of the one-particle distribution function. For this purpose we make use of a previously obtained exact solution of the 0+1D boost-invariant massive Boltzmann equation in relaxation time approximation. We extend prior attractor studies of...
Go to contribution page -
Hai-Tao Shu05/09/2023, 16:50
Heavy quarks are produced in the early stages of the ultra-relativistic heavy-ion collisions and probe the produced hot medium created in these collisions through its entire evolution. The kinetic thermalization of heavy quarks can be characterized by the heavy quark diffusion coefficient. In this talk we report the first determination of the heavy diffusion coefficient in 2+1 flavor lattice...
Go to contribution page -
Peter Alan Steinberg (Brookhaven National Laboratory (US))05/09/2023, 16:50
Relativistic heavy-ion beams at the LHC are accompanied by a large flux of equivalent photons, leading to multiple photon-induced processes. This talk presents a series of measurements of dilepton production from photon fusion performed by the ATLAS Collaboration. Recent measurements of exclusive dielectron production in ultra-peripheral collisions (UPC) are presented. These processes provide...
Go to contribution page -
Shengli Huang05/09/2023, 16:50
Collectivity in small systems is a crucial area of study in high-energy nuclear physics, as it provides valuable insights into initial conditions and pre-equilibrium stages in heavy-ion collisions. The small system collision scan at RHIC, including both symmetric and asymmetric small systems (O+O $>$ $^{3}$He$+$Au $>$ $d$$+$Au $>$ $p$$+$Au $>$ $\gamma+$Au), provides a better understanding of...
Go to contribution page -
Prof. Matthew William Luzum (University of São Paulo)05/09/2023, 16:50
There is increasing interest in using high-energy collisions to probe the structure of nuclei, in particular with the high-precision data made possible by collisions performed with pairs of isobaric species. A systematic study requires a variation of parameters representing nuclear properties such as radius, skin thickness, angular deformation, and short-range correlations, to determine the...
Go to contribution page -
Michael Murray (The University of Kansas (US))05/09/2023, 17:30
Two-particle correlations are presented for $\mathrm{K^{0}_S}$, $\Lambda$, and $\bar{\Lambda}$ strange hadrons as a function of relative momentum in lead-lead (PbPb) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV with data samples collected by the CMS experiment. These correlations are sensitive to quantum statistics and to final-state interactions between particles. The...
Go to contribution page -
Tiantian Cheng (CCNU - Central China Normal University(CN), GSI - Helmholtzzentrum fur Schwerionenforschung GmbH(DE))05/09/2023, 17:30
Recent measurements of the production of charm hadrons at midrapidity in pp collisions at $\sqrt s$ = 5.02 and 13 TeV showed that the baryon-to-meson yield ratios are significantly larger than those measured in $\rm e^{+}e^{-}$ collisions for different charm-baryon species. These observations suggest that the charm fragmentation fractions are not universal and that the baryon-to-meson ratios...
Go to contribution page -
Bijun Fan (Central China Normal University)05/09/2023, 17:30
Two-particle correlations are used to extract the space-time and dynamical information of the particle-emitting source created in heavy-ion collisions. The source radii extracted from these correlations characterize the system at the kinetic freeze-out, i.e., the last stage of particle interactions. Kaons can provide a more direct view of the particle-emitting source than pions as they have...
Go to contribution page -
Haesom Sung05/09/2023, 17:30
Based on the fact that the mass difference between the chiral partners is an order parameter of chiral phase transition and that the chiral order parameter reduces substantially at the chemical freeze-out point in ultra-relativistic heavy ion collisions, we argue that the production ratio of K1 over K∗ in such collisions should be substantially larger than that predicted in the statistical...
Go to contribution page -
Zhong Yang (CCNU)05/09/2023, 17:30
Jet-induced medium response is in the form of Mach-cone-like excitation. Diffusion wake accompanying this 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...
Go to contribution page -
Iris Ponce (Yale University)05/09/2023, 17:30
The Electron-Ion Collider (EIC) at Brookhaven National Laboratory will be an experimental facility to explore gluons in nucleons and nuclei, shedding light on their structure and the interactions within. The ePIC detector will be the first experiment at the EIC dedicated to detailed studies of nuclear structure in electron-proton and electron-ion collisions.
The ambitious physics program of...
Go to contribution page -
Prabhakar Palni (IIT Mandi)05/09/2023, 17:30
In this contribution, we extend the scope of the JETSCAPE framework to cover the jet radius ($R$) dependence of the jet nuclear modification factor, ${R_{AA}}$, for broader area jet cones, going all the way up to $R$ = 1.0. The primary focus of this work has been the in-depth analysis of the high-${p_{T}}$ inclusive jets and the quenching effects observed in the quark-gluon plasma formed in...
Go to contribution page -
Horst Sebastian Scheid (Goethe University Frankfurt (DE))05/09/2023, 17:30
Electromagnetic radiation is emitted throughout the whole evolution of high-energy heavy-ion collisions. Due to their penetrating nature, real and virtual photons reach the detector unimpeded. Their measurement makes it possible to shed light on the different stages of the extreme states of matter created in such collisions.
In this poster, we will discuss dielectron measurements that will...
Go to contribution page -
Yu Fu (Duke university)05/09/2023, 17:30
We elucidate the relationship between Color Glass Condensate (CGC) and Higher-twist (HT) formalisms at the level of physical observables by studying the direct photon production in proton-nucleus collisions. The CGC effective theory and the HT factorization theorem are two established formalisms that describe multiple scatterings of quarks and gluons in nuclear media within Quantum...
Go to contribution page -
Bruno Sebastian Scheihing Hitschfeld (Massachusetts Institute of Technology)05/09/2023, 17:30
We demonstrate that the early stages of the bottom-up thermalization scenario [1] are well described by the adiabatic hydrodynamization framework, thus providing novel analytic results on the thermalization process of QCD in a heavy ion collision. These results provide an intuitive explanation of why a gas of quarks and gluons can relax so quickly towards equilibrium, and provide a starting...
Go to contribution page -
Chiara Pinto (Technische Universitaet Muenchen (DE))05/09/2023, 17:30
The production of deuterons in pp collisions at $\sqrt{s}=$ 13 TeV is simulated on an event-by-event basis using a coalescence afterburner based on a state-of-the-art Wigner-function formalism, and EPOS 3 and PYTHIA 8.3 as event generators. The space-momentum correlations of the nucleon pairs provided by the event generators are preserved, while the nucleon-emitting source is modelled such to...
Go to contribution page -
Janik Ditzel (Goethe University Frankfurt (DE))05/09/2023, 17:30
Hypernuclei are bound states of nucleons and hyperons. The study of their properties, such as their lifetimes and binding energies, provide information on the hadronic interaction between hyperons and nucleons which are complementary to those obtained from correlation measurements. Precise modeling of this interaction is a fundamental input for the calculation of the equation of state of...
Go to contribution page -
David Wagner (Goethe University Frankfurt)05/09/2023, 17:30
The spin alignment of vector mesons emitted in heavy-ion collisions has recently been measured by the ALICE and STAR collaborations over a wide range of energies [1, 2]. The alignment is part of the so-called tensor polarization, which is a property that is exclusive to particles of spin 1 and higher. Even though there have been substantial theoretical efforts, a definite explanation for the...
Go to contribution page -
Reese Boucher05/09/2023, 17:30
The tracking system of the sPHENIX detector at RHIC consists of three layers of MAPS based silicon pixel detectors for precise vertex determination, two layers of silicon strip detectors for pattern recognition and beam crossing determination, a TPC for precise momentum measurement, and a partial coverage micromegas detector to assist with calibration of space charge distortions in the TPC....
Go to contribution page -
Gaurav Mukherjee (Bhabha Atomic Research Centre, Homi Bhabha National Institute)05/09/2023, 17:30
The quark-hadron transition that happens in ultra-relativistic heavy-ion collisions is expected to be influenced by the effects of rotation and magnetic field, both present due to the geometry of a generic non-head-on impact. We augment the conventional $ T$--$\mu_B$ planar phase diagram for QCD matter by extending it to a multi-dimensional domain spanned by temperature $T$, baryon chemical...
Go to contribution page -
Masakiyo Kitazawa05/09/2023, 17:30
We develop an implicit numerical method for solving relativistic hydrodynamics that can be more efficient than conventional explicit methods. While implicit Runge-Kutta methods have nice properties such as their stability, they are not used usually since they are generally considered to be computationally expensive. In the present study, we solve this problem by introducing a fixed-point...
Go to contribution page -
Anar Rustamov (GSI Helmholtzzentrum für Schwerionenforschung GmbH)05/09/2023, 17:30
We present an innovative procedure to account for unavoidable contributions from volume (or system size) fluctuations to experimentally measured cumulants of particle multiplicity distributions produced in relativistic nuclear collisions. For the first time we extract participant fluctuations directly from the data used for the fluctuation analysis, i.e., without involving model calculations...
Go to contribution page -
Shanjin Wu05/09/2023, 17:30
We investigate the critical fluctuations in light-nuclei production in heavy-ion collisions based on the coalescence model, where we introduce corrections to the distribution function from critical correlators from the Ising model.
The measurement of the yield ratio of light nuclei, $N_tN_p/N^2_d$ (with $N_t$, $N_p$, and $N_d$ being triton, proton, and deuteron numbers, respectively), in...
Go to contribution page -
Stephen Robicheaux05/09/2023, 17:30
The classical field approximation to Color Glass Condensate for two colliding nuclei has been solved in the literature using numerical methods and recursive analytic solution. In the weak field limit, analytic solutions in transverse momentum space have also been known for some time. Based on the latter, we derive expressions for the space-time dependence of classical gluon 2-point functions...
Go to contribution page -
Sonia Kabana (Instituto De Alta Investigación, Universidad de Tarapacá (CL))05/09/2023, 17:30
Isobar collisions, $^{96}_{44}$Ru+$^{96}_{44}$Ru and $^{96}_{40}$Zr+$^{96}_{40}$Zr, at $\sqrt{s_{\mathrm {NN}}}$ = 200 GeV have been performed at RHIC. These collisions are considered to be an effective way to minimize the flow-driven background contribution to search for the possibly small CME signal. Anisotropic flow is an important tool to understand properties of the QGP medium. Elliptic...
Go to contribution page -
Anjaly Menon05/09/2023, 17:30
Two-particle correlation functions provide critical information about the medium quark--gluon plasma (QGP) created in heavy-ion collisions. Recent ALICE measurements have demonstrated large dynamical correlations between produced neutral and charged kaons in Pb--Pb collisions at $\sqrt{s_{\rm{NN}}} = 2.76 $ TeV~\cite{ALICE:2021fpb}. These integrated correlations cannot be described by...
Go to contribution page -
Mr Davide Giordano (Università degli Studi di Torino / INFN Torino (IT))05/09/2023, 17:30
Multiple evidence reveals that the vast majority of the matter content of the universe is non baryonic and electrically neutral. This component is usually called Dark Matter (DM), for its lack of electromagnetic interactions, and is measured to constitute about 25% of the energy density of the Universe. The most common hypothesis is that it consists of weakly interacting massive particles,...
Go to contribution page -
Jeongseok Yoon (Inha University (KR))05/09/2023, 17:30
The long-range ($|\Delta\eta| \gt 2$) near-side ($\Delta\phi\approx0$) ridge structure in a two-particle correlation analysis has been observed in heavy ion collision, which was well-explained by the hydrodynamic models based on the quark-gluon plasma (QGP) effect. However, even though small systems such as pp and pPb collisions cannot have enough density and temperature to create the QGP...
Go to contribution page -
Amanda Nicole Flores (University of Texas at Austin (US))05/09/2023, 17:30
Heavy-flavor (charm and beauty) quarks are generated primarily via hard scattering processes in high-energy hadronic collisions, and then undergo parton shower (fragmentation) and hadronization. Two-particle azimuthal correlations of heavy-flavor particles is a differential measurement which allows for the study of the fragmentation of heavy quarks. By measuring the azimuthal correlation in...
Go to contribution page -
Dr Zhaozhong Shi (Los Alamos National Laboratory)05/09/2023, 17:30
The beauty quark is a unique probe to study the properties of quark-gluon plasma thanks to its large mass and relatively long thermal relaxation time compared with lighter partons. Traditional experimental observables such as elliptic flow v$_2$ and nuclear modification factor R$_{AA}$ of fully reconstructed beauty hadrons have been measured at the LHC. Moreover, indirect measurements on...
Go to contribution page -
Jakub Kvapil (Los Alamos National Laboratory (US))05/09/2023, 17:30
Beauty quarks are produced in hard-parton scatterings in the early stages of the partonic collisions. They are the ideal probe to investigate the properties of Quark-Gluon Plasma (QGP) produced in ultra-relativistic heavy-ion collisions as they experience the whole QGP evolution. Due to their large mass, their production can be calculated using perturbative Quantum Chromodynamics (pQCD), thus...
Go to contribution page -
Sigurd Nese (University of Oslo (NO))05/09/2023, 17:30
In ultra-relativistic heavy-ion collisions, the colliding nuclei are decelerated and kinetic energy is converted into new particles. This energy loss is referred to as baryon stopping. A fundamental question one can ask in the study of high energy heavy-ion collisions is how much baryon stopping there is. This can be quantified by measuring the net proton rapidity distributions. Previous...
Go to contribution page -
Dr Yu Zhang (Central China Normal University)05/09/2023, 17:30
Fluctuations of conserved quantities are proposed as a powerful observable to search for the QCD critical point. Recently, proton cumulants from central Au+Au $\sqrt{s_{NN}}$ = 3 GeV collisions were reported, which implies that hadronic interactions are dominant at 3 GeV and the QCD critical point could exist at the collision energies higher than 3 GeV. The baryon-strangeness correlation is...
Go to contribution page -
Luke Legnosky (Stony Brook University)05/09/2023, 17:30
The sPHENIX TPC readout will use an array of quadruple-stacked gas electron multiplier (GEM) modules to amplify signals from the chamber in order to perform precise tracking measurements. The performance of the system may be affected by a shift in the readout baseline due to event-by-event fluctuations. These fluctuations are a result of the common-mode noise generated in the induction gap of...
Go to contribution page -
Nasser Demir (Kuwait University (KW))05/09/2023, 17:30
Ultra-relativistic heavy-ion collisions at RHIC are thought to have created a Quark-Gluon-Plasma (QGP) with a very low shear viscosity in the deconfined phase. However, as the QGP hadronizes it will evolve through a hadronic phase with rapidly increasing shear viscosity. In order to fully characterize the QGP state, one has to separately determine the viscosity of the hadronic phase. Although...
Go to contribution page -
Shuhang Li05/09/2023, 17:30
The sPHENIX detector at Brookhaven National Laboratory’s (BNL) Relativistic Heavy Ion Collider (RHIC) is scheduled to begin data acquisition in 2023. Its primary objective is to investigate the microscopic properties of the Quark-Gluon Plasma (QGP) through high-precision measurements of jets and heavy flavor observables. A key feature of the sPHENIX detector is the inclusion of hadronic...
Go to contribution page -
Justin Edward Frantz05/09/2023, 17:30
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 example, gain tracing vs time, where siPM's can be more sensitive to temperature fluctuations, and also position dependencies in...
Go to contribution page -
Niklas Schild05/09/2023, 17:30
Electromagnetic probes have been established as promising tools to study early times in the collision system of maximum temperature and density.
In this contribution, a focus is set on the investigation of collective observables. Namely, the directed flow $v_1$, elliptic flow $v_2$ as well as the radial flow of virtual photons are measured. After the isolation of the thermal contribution, a...
Go to contribution page -
Emil Gorm Nielsen (University of Copenhagen (DK))05/09/2023, 17:30
High-energy heavy-ion collisions offer a unique and precise way to probe nuclear structures by providing a snapshot of the nuclear distribution at the time of the collision, which is complementary to low-energy nuclear physics experiments.
In this talk, we present a comprehensive scan of flow observables, including anisotropic flow coefficients, nonlinear flow modes, and normalized...
Go to contribution page -
Charles Hughes (University of Tennessee (US))05/09/2023, 17:30
The sPHENIX Time Projection Chamber (TPC) is a gaseous drift detector
Go to contribution page
designed to measure charged particle tracks. It is filled with Argon/CF4 and uses
Gaseous Electron Multiplier (GEM) foils at readout for electron amplification
and ion back-flow suppression. The electrons at readout are measured, converted
to digital current, and their signal waveforms are processed to reconstruct the... -
Benjamin Kimelman (Vanderbilt University)05/09/2023, 17:30
The Time Projection Chamber (TPC) is the main tracking detector in sPHENIX. Charged particles which pass through the TPC ionize the gas, with the transverse position being given by the readout pad and the time for the ionization electrons to drift to the endcaps defining the z position. The ionization electrons are clustered together in order to track particles and determine their momenta. In...
Go to contribution page -
Bade Saykı (Los Alamos National Laboratory)05/09/2023, 17:30
The sPHENIX Time Projection Chamber (TPC) serves as the main tracking detector of the sPHENIX experiment, which began operating at the Relativistic Heavy Ion Collider at Brookhaven National Lab this year. It operates with a quadruple-GEM avalanche stage which provides gain while restricting the flow of ions back into the chamber sufficiently to operate in streaming mode, without any...
Go to contribution page -
Eugenia Khyzhniak05/09/2023, 17:30
The RHIC Beam Energy Scan (BES) program aims to study the properties of strongly interacting matter in relativistic heavy-ion collisions at various energy densities and temperatures. Correlation femtoscopy technique is a useful tool to study systems undergoing QCD phase transitions, and can extract valuable information about the size, shape, and lifetime of the particle-emitting source in...
Go to contribution page -
Hyungjun Lee (Sungkyunkwan University (KR))05/09/2023, 17:30
The multiplicity distribution measures the probability of obtaining a certain number of particles in a given collision and is one of the first observables measured in data at each new collision type and center of mass energy. It is relevant since is one of the fundamental observables to describe the global properties of the interactions and is sensitive to non-linear QCD evolution in the...
Go to contribution page -
557. Charged particle multiplicity distribution in pp collisions at $\sqrt{s}$ = 13.6 TeV with ALICEMr Joonsuk Bae (Sungkyunkwan University (KR))05/09/2023, 17:30
Multiplicity distributions of primary charged particles are sensitive to non-linear QCD evolution in the initial state. We present the distributions in various pseudorapidity ranges in proton-proton collisions at $\sqrt{s}$ = 13.6 TeV. Charged particles are reconstructed using the Inner Tracking System that has been upgraded for Run3 at LHC and is operation starting in 2022. The data are...
Go to contribution page -
Hao-Ren Jheng (Massachusetts Inst. of Technology (US))05/09/2023, 17:30
sPHENIX, the first detector to be built at the Relativistic Heavy-Ion Collider (RHIC) in over two decades, will bring unprecedented measurement capabilities at RHIC energies. One of the initial physics measurements to be performed by sPHENIX concerns the charged-particle multiplicity, which utilizes the tracklet analysis method with the cluster information from the...
Go to contribution page -
Valeriya Mykhaylova (University of Wrocław)05/09/2023, 17:30
We study the production of charm quarks in hot QCD medium described by quasiparticle excitations of quarks and gluons. The effective masses are adjusted through the coupling to satisfy the entropy density obtained on the lattice [1]. The evolution of the QGP is described by hydrodynamic simulations in (2+1) dimensions with temperature-dependent shear viscosity taken into account [1,2]. The...
Go to contribution page -
Jinjoo Seo (Inha University (KR))05/09/2023, 17:30
Quarkonium production is considered one of the golden probes of the quark-gluon plasma (QGP) formation in heavy-ion collisions.
Go to contribution page
Due to their large mass, the production of heavy-quarks is governed by hard scales of QCD, while the formation of the bound quarkonium state involves soft QCD scales.
The regeneration process of J/$\psi$ in the QGP or at the phase boundary is crucial for describing... -
Sean Bartz (Indiana State University)05/09/2023, 17:30
The AdS/CFT correspondence, which connects strongly coupled conformal field theories in $N$ dimensions to gravity in $N+1$ dimensional Anti-de Sitter space, has provided valuable insights into the non-perturbative aspects of QCD. Soft-wall AdS/QCD is a phenomenological model that uses a dilaton field to introduce confinement, while a scalar field is dual to the chiral condensate. The...
Go to contribution page -
Brian Gerald Hanley (Wayne State University (US))05/09/2023, 17:30
Balance functions have been extensively used to elucidate the time evolution of quark production in heavy-ion collisions. Early models predicted two stages in the quark production, one for light quarks and one for the slightly heavier strange quark, separated by a period of isentropic expansion. This led to the notion of clocking the particle production and tracking radial flow effects. The...
Go to contribution page -
Dr ZHONGLING JI (UCLA)05/09/2023, 17:30
The Time Projection Chamber (TPC) at sPHENIX provides particle tracking over pseudorapidity $|\eta| <$ 1.1, and plays a key role in the planned jet and heavy-flavor measurements. The electrons created through ionization of the TPC gas by charged particles produce hits on the TPC readout plane, from which clusters for track reconstruction need to be formed. The traditional method of grouping...
Go to contribution page -
Sungtae Cho05/09/2023, 17:30
We study charmonium states, J/ψ, ψ(2S), and χc1(1P) mesons in heavy ion collisions by focusing on their production from charm and anti-charm quarks in a quark-gluon plasma by coalescence. Starting from the investigation on the difference in their internal structures, or different wave functions of charmonium states we calculate the yield and transverse momentum distributions of charmonium...
Go to contribution page -
Ejiro Naomi Umaka (Brookhaven National Laboratory (US))05/09/2023, 17:30
Many physics observables of interest in heavy-ion collisions require knowledge of the collision geometry. Geometric fluctuations lead to different symmetry planes of the initial geometry for each harmonic number, called participant planes. As the produced medium evolves, pressure gradients transform the initial state spatial anisotropy into final state momentum anisotropy. The angular...
Go to contribution page -
Oleksii Ivanytskyi (University of Wroclaw)05/09/2023, 17:30
We present a relativistic density functional approach to color superconducting quark matter that mimics quark confinement by a fast growth of the quasiparticle self-energy in the confining region [1]. The approach is shown to be equivalent to a chiral model of quark matter with medium dependent couplings. The approach to the conformal limit at asymptotically high densities is provided by a...
Go to contribution page -
Martin Lothar Purschke (Brookhaven National Laboratory (US))05/09/2023, 17:30
The new sPHENIX detector at RHIC will begin commissioning with Au+Au collisions at 200 GeV in Spring 2023, followed by p+p and p+Au data taking in 2024. The experiment combines triggered readout of the calorimeter system with streaming readout of the tracking detectors in a hybrid readout scheme. The hybrid readout scheme enables a large increase in the collected statistics in particular for...
Go to contribution page -
Gaurav Mukherjee (Bhabha Atomic Research Centre, Homi Bhabha National Institute)05/09/2023, 17:30
Net-charge, net-strangeness and net-baryon number fluctuations measured in ultra-relativistic heavy-ion collisions may reveal details and insights into the quark-hadron transition, hadro-chemical freeze-out and possibly aid in the search of the QCD critical point. By controlling the collision energy, some current and upcoming heavy-ion facilities aim to study high energy nucleus-nucleus...
Go to contribution page -
Valerie Wolfe (Lehigh University)05/09/2023, 17:30
Constructed at Lehigh University between 2021 and 2023, the sPHENIX Event Plane Detector (sEPD) will measure charged particle multiplicity at forward rapidity from the collision of hadrons. This detector consists of 24 triangular sectors, each of which is divided into 31 optically isolated tiles of plastic scintillating material, such that light can be collected from a discrete area of the...
Go to contribution page -
Christoph Blume (Goethe University Frankfurt (DE))05/09/2023, 17:30
HADES has a large acceptance as well as excellent particle identification capabilities and therefore allows the study of dielectron, hadron, and light nuclei production in heavy-ion collisions with great precision. The harmonic flow coefficients $v_n$ of the order $n = 1 − 6$ are measured with HADES as a function of centrality, transverse momentum, and rapidity in Au+Au collisions at 1.23...
Go to contribution page -
Mr Oleh Savchuk (Bogolyubov Institute for Theoretical Physics and Facility for Rare Isotope Beams)05/09/2023, 17:30
Correlations involving the seven conserved quantities, $\{E,\vec{p},Q,S,B\}$, were modeled for heay-ion collisions at finite baryon density. The evolution of correlations as a function of relative rapidity was treated as a linear response to local thermodynamic fluctuations of on the Bjorken-model background. The entire 7x7 matrix of correlations was found to be significant, sensetive to the...
Go to contribution page -
Swati Saha (National Institute of Science Education and Research (NISER) (IN))05/09/2023, 17:30
Correlations between net-conserved quantities such as net-baryon, net-charge and net-strangeness are essential probes of QCD phase structure and are related to the ratios of thermodynamic susceptibilities in lattice QCD calculations. The study of these correlations can probe thermal conditions in a medium and help to elucidate the nature of the strongly interacting matter formed in high-energy...
Go to contribution page -
Mr Blessed Arthur Ngwenya05/09/2023, 17:30
We present energy loss predictions of B and D-mesons at $\sqrt{s}=200$ GeV in pA collision systems. We assume that the medium produced in these collisions is strongly coupled, and show the centrality and momentum dependence of the nuclear modification factor at midrapidity. We also quantify the systematic theoretical uncertainties in these predictions that are a result of the mapping of...
Go to contribution page -
Aaron Park05/09/2023, 17:30
In this work, we investigate the color-spin interaction of a quark, a diquark and a baryon with their surrounding baryons and/or quark matter. This is accomplished by classifying all possible flavor and spin states of the resulting multiquark configuration in both the flavor SU(2) and SU(3) symmetric cases. We also discuss the three-body confinement potential and show that this does not...
Go to contribution page -
Jiayin Sun (Universita e INFN, Cagliari)05/09/2023, 17:30
Studies of charm production in proton-proton ($pp$) collisions are essential to understand some of the most fundamental aspects of Quantum Chromodynamics. They also provide the baseline for interpretation of charm data from larger colliding systems. Over the last decade, the measurement of the production cross-sections of charm mesons and baryons in $pp$ collisions has been at the centre of a...
Go to contribution page -
Micah Meskowitz05/09/2023, 17:30
The quark-gluon plasma (QGP) is a liquid created in high-energy heavy-ion collisions where quarks and gluons become deconfined. This state allows us to examine the emergent properties of quantum chromodynamics (QCD) under extreme conditions. sPHENIX, a new experiment at RHIC, studies the QGP created in Au-Au collisions and started taking data in 2023. Collimated sprays of particles, called...
Go to contribution page -
Dr Roli Esha (Center for Frontiers in Nuclear Science, Stony Brook University)05/09/2023, 17:30
In this poster, PHENIX presents a proof of principle study for the measurement of prompt and non-prompt $e^{+}e^{-}$ pair production in the intermediate mass range ($m_{\phi}$ $<$ $m_{ee}$ $<$ $m_{J/\psi}$) using $p$+$p$ data at 200 GeV taken in 2015. PHENIX plans to extend the measurement to the high statistics Au+Au data-set recorded in 2014 and 2016, with the goal to isolate the expected...
Go to contribution page -
Ante Bilandzic (Technische Universitaet Muenchen (DE))05/09/2023, 17:30
Results from heavy-ion collisions confirmed the scenario in which the deconfined state of nuclear matter, dubbed the quark--gluon plasma (QGP), undergoes a collective expansion. Collective anisotropic flow, quantified with Fourier harmonics of azimuthal distribution of particles, $v_n$, is one of the most sensitive experimental probes to constrain QGP properties. Recently developed...
Go to contribution page -
Renan Hirayama (FIAS)05/09/2023, 17:30
We present the first results for dielectron anisotropic flow computed directly from hadronic transport in different systems, and explore the different calculation methods. Because leptons are insensitive to the strong interaction, they are mostly undisturbed by the hadronic medium created after a heavy-ion collision, and therefore serve as direct probes for it. In particular, the HADES...
Go to contribution page -
Karina Scharmann (Justus-Liebig-Universitaet Gießen)05/09/2023, 17:30
In this contribution we present results on the dielectron production in $Ag+Ag$ collisions (0-40% centrality) and $p+p$ interactions at $1.58 \, AGeV$ 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...
Go to contribution page -
SHARANG RAV SHARMA (IISER Tirupati)05/09/2023, 17:30
The anisotropic flow parameters $(v_{n})$ offer insights into collective hydrodynamic expansion and transport properties of the produced medium at higher collision energies, while they are sensitive to the compressibility of the nuclear matter and nuclear equation of state at lower collision energies. Among them directed flow ($v_1$) describes the collective sideward motion of produced...
Go to contribution page -
Junyi Han (Central China Normal University)05/09/2023, 17:30
Studying hyper-nuclei production and their collectivity can shed light on their production mechanism as well as the hyperon-nucleon interactions under finite pressure. This is a unique opportunity for heavy-ion collisions at high baryon density region where hypernuclei production rate increases.
In this poster, we will present $v_{1}$ of the hyper-nuclei ($\Lambda$, $^{3}_{\Lambda}{\rm...
Go to contribution page -
Xinyue Ju05/09/2023, 17:30
With the extreme temperatures and energy densities generated by ultra-relativistic heavy-ion collisions, a new state of matter with surprising fluid properties will be created. Non-central heavy-ion collisions can generate a large initial angular momentum, resulting a strong vortical of $\omega \approx (9 \pm 1)× 10^{-21} s^{−1}$ in the fluid, estimated from the global $\Lambda$ hyperon...
Go to contribution page -
Emilie Duckworth (Kent State University)05/09/2023, 17:30
Directed flow of particles is an important feature seen in heavy-ion collisions and is a sensitive probe to the equation of state (EoS) of the matter produced in the collisions. Model calculations have also predicted that directed flow could be sensitive to the softening of EoS associated with a first order phase transition. Directed flow of protons and anti-protons are also of interest as...
Go to contribution page -
Dhanush Anil Hangal (Lawrence Livermore Nat. Laboratory (US))05/09/2023, 17:30
The Time Projection Chamber (TPC) to be used for tracking and particle identification in the sPHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) is expected to experience significant distortions from build-up of backflowing ions created by the combination of high collision rates and amplification from Gas Electron Multiplier (GEM). By integrating the digitized readout from the...
Go to contribution page -
Mr Charles-Joseph Naïm (Université Paris-Saclay (FR))05/09/2023, 17:30
The nuclear modification factor related to the Drell-Yan (DY) production cross-section is an excellent probe of the cold nuclear matter (CNM) properties. The acceptance of the sPHENIX detector allows detection of DY events in the dielectron channel for p$_\perp$ ≳ M, where p$_\perp$ is the dilepton transverse momentum and M its invariant mass. In this kinematic region, the DY cross-section is...
Go to contribution page -
Prof. Soeren Schlichting (Universität Bielefeld)05/09/2023, 17:30
In the chiral limit the complicated many-body dynamics around the second-order chiral phase transition of two-flavour QCD can be understood by appealing to universality. We present a novel formulation of real-time functional renormalization group that describes the stochastic hydrodynamic equations of motion for systems in the same dynamic universality class, which correspond to Model G in the...
Go to contribution page -
Koichi Murase (Yukawa Institute for Theoretical Physics, Kyoto University)05/09/2023, 17:30
We analyze the effect of hydrodynamic fluctuations on normalized mixed harmonic cumulants ($nMHC$) [1,2] for the first time based on event-by-event simulations of high-energy heavy-ion collisions using an integrated model of an initial state model, stochastic causal fluctuating hydrodynamics, and a hadronic afterburner.
For the quantitative constraints on the transport properties of...
Go to contribution page -
Aman Dimri (Stony Brook University (US))05/09/2023, 17:30
In heavy ion collisions, the initial state geometry plays a crucial role in determining final state observables such as elliptic flow $v_2$ and radial flow reflected by event-wise average transverse momentum $[p_{\rm T}]$. The initial state geometry is influenced by several nuclear shape parameters, including quadrupole deformation (β), triaxiality (γ) [1], nuclear radius (r), and skin depth...
Go to contribution page -
Mr Hendrik Roch (FIAS)05/09/2023, 17:30
The effect of the hadronic phase on jet quenching in nuclear collisions is largely an open question, although there are tantalizing hints from previous studies that the effects might be sizable. We have implemented a hadronic afterburner phase for jet fragmentation hadrons in the JETSCAPE framework using SMASH. We have applied the new setup to $e^++e^-$, $p+p$ and $A+A$ systems in order to...
Go to contribution page -
Luis Bichon III05/09/2023, 17:30
The Quark Gluon Plasma (QGP) produced in relativistic heavy ion collisions exhibits a nearly perfect fluid behavior. This behavior is observed as strong azimuthal correlations between the produced particles. Measurement of $J/\psi$ azimuthal correlations can provide key information about the charm quark dynamics in the QGP. Strong elliptic flow of $J/\psi$ has been observed in Pb+Pb...
Go to contribution page -
Wen-Hao Zhou (复旦大学)05/09/2023, 17:30
To incorporate the effect of gluons on the evolution dynamics of the quark matter produced in relativistic heavy-ion collisions, we extend the three-flavor Nambu–Jona-Lasinio (NJL) transport model to include the contribution from the Polyakov loops. Imbedding the resulting pNJL partonic transport model in an extended multiphase transport (extended AMPT) model, we then study the elliptic flow...
Go to contribution page -
THOMAS MARSHALL05/09/2023, 17:30
Nuclear modification factors ($R_{AA}$) of leading particles provide valuable information about the flavor dependent magnitude and characteristics of parton energy loss in $A+A$ collisions. Experimental measurements of $R_{AA}$ exhibit a distinct different dependence on transverse momentum ($p_{T}$) at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). Previous...
Go to contribution page -
Wei Zhang05/09/2023, 17:30
Measurements of heavy quarkonia in heavy-ion collisions play a crucial role in studying the properties of the quark-gluon plasma (QGP). The dissociation of J/$\psi$, caused by the color screening effect, was proposed as a direct signature of the QGP formation. However, recombination of deconfined charm-anticharm (c$\bar{c}$) pairs complicates the interpretation of the observed J/$\psi$...
Go to contribution page -
Christos Pliatskas Stylianidis (Nikhef National institute for subatomic physics (NL))05/09/2023, 17:30
Jets are excellent probes for studying the deconfined matter formed in heavy ion collisions. However, competing energy-loss effects, such as the dependence on the opening angle of the shower, radiative emissions to large angles, and the medium response to the jet, can obscure interpretation. This talk presents two new observables aimed at disentangling these effects. First, we introduce a new...
Go to contribution page -
Jeremy Hansen (Iowa State University)05/09/2023, 17:30
Chiral media, such as quark-gluon plasma, possess a number of unique properties originating from the quantum phenomenon of the chiral anomaly. These properties can be measured by observing the propagation of fast charged particles moving through the medium and the radiation produced in the process. We show how the chiral anomaly confers distinctive features onto the particle energy loss and...
Go to contribution page -
Beatrice Liang-Gilman (University of California Berkeley (US))05/09/2023, 17:30
Energy-energy correlators (EEC) offer a novel way to study the structure of jets. Defined as the energy-weighted cross section of particle pairs inside jets, the correlation strength as a function of the pair opening angle allows a distinct separation of the perturbative and non-perturbative regimes. The evolution of parton dynamics in jets to their confinement into hadrons can be studied....
Go to contribution page -
Anjali Nambrath (University of California Berkeley (US))05/09/2023, 17:30
Energy-energy correlators (EEC) have been proposed to study the structure of energy flow within jets. These functions are defined as the energy-weighted cross-section of particle pairs inside jets. The correlation as a function of pair distance and jet transverse momentum offers a clear separation between the perturbative and non-perturbative regimes, where one can probe the dynamics of quarks...
Go to contribution page -
Alek Hutson (University of Houston (US))05/09/2023, 17:30
In an effort to better understand the thermal-like behavior and particle yields seen in p-p collisions we recast the problem employing the principles of quantum states and their entanglement in the produced system. We seek to show that this entanglement in the initial state has a measurable effect on the evolution of the system and is the driving mechanism behind the thermal-like behavior and...
Go to contribution page -
Ms Bushra Ali (Aligarh Muslim University (IN))05/09/2023, 17:30
Multiplicity data on $\rm\bar{p}$p/pp collisions at {\footnotesize SPS} and {\footnotesize LHC} energies (0.2-7 TeV) are used to study the entropy production, dimensions and other multifractal characteristics of multiplicity distributions of relativistic charged particles produced. It is observed that the entropy produced in smaller and(or) larger phase space bins, when normalized to maximum...
Go to contribution page -
Katarzyna Gwizdziel (Warsaw University of Technology (PL))05/09/2023, 17:30
Measurements of azimuthal correlations of charmed mesons in high-energy heavy-ion collisions can shed light on the transport properties of the Qaurk-Gluon Plasma. The STAR experiment at the Relativistic Heavy Ion Collider (RHIC) collected in 2014 and 2016 a large sample of Au+Au reactions at $\sqrt{s_{NN}}$ = 200 GeV making such a study possible. The sPHENIX experiment will also offer a...
Go to contribution page -
Niklas Götz05/09/2023, 17:30
The initial state of heavy-ion collisions has a short lifetime and cannot be directly measured. As a result, various initial condition models exist. Although averaged event observables with different initial condition models give comparable results, event by event analysis can help to identify systematic differences. To determine the initial conditions is crucial to assess systematic...
Go to contribution page -
Ramni Gupta (University of Jammu (IN))05/09/2023, 17:30
A hot and dense system formed in heavy-ion collisions can be characterized by studying the scaling behavior of the spatial distributions of the produced particles. In this contribution, we present intermittency analysis of the normalized factorial moments ($F\rm{_{q}}$) of the multiplicity distributions of the charged particles produced in Pb--Pb collisions as a function of phase-space...
Go to contribution page -
Isaac Mooney05/09/2023, 17:30
Partonic scatterings with high momentum transfer occur before the formation of the quark-gluon plasma (QGP) in heavy-ion collisions and result in collimated collections of hadrons, called jets. The modification of the high-virtuality parton shower in the QGP compared to that in proton-proton collisions offers insight into the nature of the medium's interactions with colored probes. To study...
Go to contribution page -
490. Exploring hadronic resonances through EPOS4 model: A study of particle interactions and spectraVikash Sumberia (University of Jammu (IN))05/09/2023, 17:30
Hadronic resonances are interesting candidates to study the properties of the hadronic phase, which is the time span between the chemical and kinetic freeze-outs, formed during the evolution of relativistic heavy-ion collisions. Due to their short lifetimes, comparable to the lifetime of hadronic phase ($\sim$10 $-$ 12 fm/$c$), they decay in the hadronic phase and their decay products undergo...
Go to contribution page -
Shujun Zhao05/09/2023, 17:30
Exploring the transport coefficients of the QGP is one of the main goals in relativistic heavy ion collisions. By employing the Bayesian analysis method, the temperature dependent shear and bulk viscosity of QGP medium has been extracted. However, the heat conductivity of the QGP has not been fully explored. Using single-shoot MUSIC hydrodynamics with smooth initial condition, ref.[1] found...
Go to contribution page -
Alexander Bylinkin (ITEP)05/09/2023, 17:30
The investigation of light hadrons in UPCs is of great interest for QCD studies. ALICE is a superb detector for studying these processes because of its excellent particle identification and tracking capabilities. The measured cross section of coherent $\rho^{0}$ mesons in photon-lead interactions has been found to be about 40% smaller than what is predicted by the Glauber model, and...
Go to contribution page -
Mr Nikolás Cruz Camacho (University of Illinois at Urbana-Champaign)05/09/2023, 17:30
The Chiral Mean Field model (CMF) has been successful in describing the equation of state at large baryon densities, such as those found in neutron stars, neutron star mergers, and heavy-ion collisions. The MUSES collaboration has rewritten the zero-temperature CMF model from Fortran 77 into a parallelized modern C++20 using OpenMP, which has resulted in at least an order of magnitude...
Go to contribution page -
Mr Souvik Priyam Adhya (Institute of Nuclear Physics, Polish Academy of Sciences)05/09/2023, 17:30
Heavy-ion collisions produce a quark-gluon plasma that undergoes rapid expansion and cooling, which presents a challenge for calculating jet quenching observables. Current approaches rely on analytical results for static cases, introducing theoretical uncertainties and biases in our understanding of the pre-equilibrated medium. To address this issue, we employ analytical re-summation schemes...
Go to contribution page -
Roy Lacey05/09/2023, 17:30
Studying atomic nuclei's deformation and substructure, including quadruple, triaxial, and octupole shapes, is crucial to understanding nuclear structure comprehensively. The cluster structures depend on variables such as excitation energy, core clusters, and excess neutrons. Although clusters are tightly bound in low-lying states, the correlation between clusters and their formation is not...
Go to contribution page -
Somadutta Bhatta (Stony Brook University (US))05/09/2023, 17:30
The thermal fluctuations in the QGP medium formed in heavy ion collisions present themselves as event-wise $[p_\mathrm{T}]$ fluctuations in the final state. Recent studies have shown that the average and higher-order fluctuations of $[p_\mathrm{T}]$ in ultra-central collisions are sensitive to radial flow, random thermal motion, and nuclear deformation, and can provide constraints on the...
Go to contribution page -
Anju Bhasin (University of Jammu (IN))05/09/2023, 17:30
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, such as near-side long-range correlations, mass-dependent hardening of ${p}_{\mathrm T}$ spectra, strangeness enhancement etc. Therefore, one of the key challenges today is understanding the origin of strangeness enhancement...
Go to contribution page -
He-Xia Zhang05/09/2023, 17:30
Exploring thermoelectric Figure of Merit in QCD medium with conserved charges
It is the goal of the RHIC BES program and the future FAIR, NICA facilities to produce baryon-rich matter. In these low-energy HIC experiments, diffusion processes of conserved charges play a vital role in dynamic evolution of dense QCD matter. Recently, thermoelectric effects such as Seebeck effect, which...
Go to contribution page -
Mr Souvik Priyam Adhya (Institute of Nuclear Physics, Polish Academy of Sciences)05/09/2023, 17:30
We investigate the characteristics of gluonic cascades in static and expanding media by numerically solving the complete BDIM (Blaizot-Dominguez-Iancu-Mehtar-Tani) evolution equations in longitudinal and transverse momentum using the Monte Carlo event generator MINCAS. In this analysis, we compare angular distributions of in-cone radiation across various medium profiles with effective scaling...
Go to contribution page -
Andreas Kirchner (ITP Heidelberg)05/09/2023, 17:30
It is well established that the late states of a high energy nuclear collision can be described in terms of relativistic fluid dynamics. An open problem in this context is how the actual collision and the early time dynamics directly after it can be described. Phenomenological models are currently employed here and they have several parameters that need to be fitted to experimental...
Go to contribution page -
Yuji Goto (Riken)05/09/2023, 17:30
The Electron Ion Collider offers unprecedented opportunities to image the proton and nuclei. The Far Forward detectors serve to classify the nature of the electron-proton or electron-nucleus interaction by identifying forward proton, neutrons and photons. This talk will review progress in developing an imaging Zero Degree Calorimeter for the EIC. The detector is designed to meet the stringent...
Go to contribution page -
Sam Corey05/09/2023, 17:30
One of the primary goals of the EIC is to deepen our understanding the multidimensional structure and distribution of gluons within nucleons and nuclei. The recent discovery of entanglement enabled spin interference in photonuclear heavy-ion collisions offers a powerful new avenue for exploring gluon distributions at high energy with RHIC and the LHC in the years leading up to the EIC. Most...
Go to contribution page -
Keisuke Tomohiro (Hiroshima University (JP))05/09/2023, 17:30
The origin of hadron masses cannot be attributed to the Higgs mechanism alone. On top of that, the spontaneous breaking of chiral symmetry potentially restored at extremely high temperatures, plays an important role. Low-mass vector mesons (ρ, ω, φ) are highly sensitive to chiral symmetry restoration effects, and their electromagnetic spectral function is expected to be modified in Pb-Pb...
Go to contribution page -
Mate Csanad (Eotvos University, Budapest)05/09/2023, 17:30
Exploring the space-time extent of particle production is an important goal of heavy-ion physics, and substantial effort has been made in order to understand the underlying physics behind the experimental observations of non-Gaussian behavior. In experiments, femtoscopic (momentum) correlations are utilized to gain information about the space-time geometry of the particle emitting source....
Go to contribution page -
Matteo Buzzegoli05/09/2023, 17:30
In Heavy-Ion Collisions (HIC), the high temperature nuclear matter is expected to be produced with a chiral imbalance. The presence of a chiral imbalance can be detected in HIC by looking at observables related to the Chiral Magnetic Effect (CME). In off-central collisions,the nuclear matter also posses a very large vorticity. In order to preserve causality, a rotating system can not extend to...
Go to contribution page -
Emma Yeats05/09/2023, 17:30
Measurements of heavy-flavor hadron production play an important role in the testing of pQCD calculations, and represent a critical component in studies of the quark-gluon plasma (QGP) created in heavy-ion collisions. We study three different D0-tagged jet axes, with varying degrees of sensitivity to wide-angle radiation: Standard, Soft Drop groomed, and Winner-Take-All (WTA). By considering...
Go to contribution page -
Anirvan Shukla (University of Hawai'i at Manoa (US))05/09/2023, 17:30
NA61/SHINE has measured the first deuteron production in proton-proton interactions at 158 GeV/c (sqrt(s) = 17.3 GeV). These measurements will be presented and compared to different nuclear formation models. The two most prevalent formation models—the thermal and coalescence models—are based on different underlying physics. A better understanding of (anti)nuclei production mechanisms is...
Go to contribution page -
Ante Bilandzic (Technische Universitaet Muenchen (DE))05/09/2023, 17:30
Besides the traditional flow studies of individual flow amplitudes $v_n$, independent information about all stages in heavy-ion evolution can be extracted from multi-harmonic correlations of flow amplitudes. The simplest realization is Symmetric Cumulants (SC), which correlate the same-order moments of two or more flow amplitudes. In recent studies, it was demonstrated that SC can reveal the...
Go to contribution page -
Priyanka Roy Chowdhury05/09/2023, 17:30
Heavy quarks are produced in hard partonic scatterings at the very early stage of heavy-ion collisions and they experience the whole evolution of the Quark-Gluon Plasma medium. Femtoscopic correlations, i.e. two-particle correlations at low relative momentum, are sensitive to the final-state interactions as well as to the extent of the region from which the correlated particles are emitted. A...
Go to contribution page -
Wioleta Rzesa (Warsaw University of Technology (PL))05/09/2023, 17:30
Accurate knowledge of the strong interaction between charged kaons and (anti)deuteron is a missing piece of information in the field of the low-energy (anti)kaon-nucleon interactions for more than 40 years. The interaction between charged kaons and (anti)deuterons is a complex subject at both experimental and theoretical levels. From the experimental point of view, so far scattering cross...
Go to contribution page -
Jaebeom Park05/09/2023, 17:30
The sPHENIX detector is designed to study fundamental properties of the quark-gluon plasma created in heavy ion collisions at the Relativistic Heavy Ion Collider at Brookhaven National Laboratory. The sPHENIX Event Plane Detector (sEPD) is constructed both in the forward and backward rapidity region with the coverage of 2.1 $<|\eta|< $4.9. The essential role of the sEPD is to provide event...
Go to contribution page -
Piotr Podlaski (University of Warsaw (PL))05/09/2023, 17:30
The first results on identified hadron spectra produced in central Xe+La collisions at SPS will be presented. The kinematic distributions and measured multiplicities of identified hadrons will be compared with previously released by NA61/SHINE results on p+p, Be+Be, Ar+Sc and NA49 Pb+Pb results, as well as with available world data.
Obtained results, and in particular ratio of positively...
Go to contribution page -
Andrew Gordeev05/09/2023, 17:30
During the early hydrodynamic phase, the chemical composition of the quark-gluon plasma (QGP) is still largely unknown. Here we study the effects of quark chemical equilibration on the QGP using a novel model of viscous hydrodynamic evolution in partial chemical equilibrium. In this model, we initialize the QGP in a completely gluon dominated state, as motivated by the success of gluon...
Go to contribution page -
Andi Mankolli (Vanderbilt University (US))05/09/2023, 17:30
Higher order flow harmonics provide a powerful probe of the initial geometry of heavy ion collisions, as well as the properties of the quark-gluon plasma produced in these collisions, including the transport coefficients and the degree of collective behavior. This poster presents higher order flow harmonics measurements in PbPb collisions at $\sqrt{s_{_{\mathrm{NN}}}} = 5.02$~TeV using data...
Go to contribution page -
Uttam Acharya (Georgia State University)05/09/2023, 17:30
Forward and backward rapidity regions are rich laboratories to explore several effects which happens to a probe before and after its hard scattering. The large rapidity region may also experiment a different dynamics for strangeness enhancement seen in heavy ion collisions at RHIC and LHC. The PHENIX experiment has a long history of large rapidity measurements with the muon spectrometers...
Go to contribution page -
Patrycja Słoń (National Centre for Nuclear Research)05/09/2023, 17:30
Various interesting phenomena have been predicted to occur in a quark-gluon plasma produced in relativistic heavy-ion collisions due to a strong magnetic field which is also generated in these collisions. However, none of these predictions has been convincingly confirmed experimentally yet. So, the question is why? Our aim is to systematically discuss the problem of magnetic field generation....
Go to contribution page -
Antonio Carlos Oliveira Da Silva (Iowa State University)05/09/2023, 17:30
The sPHENIX experiment at RHIC will begin commissioning with Au+Au data in Spring 2023. The Monolithic Active Pixel Sensor (MAPS) based Vertex Detector (MVTX), the Intermediate Silicon Tracker (INTT) and the Time Projection Chamber (TPC) at sPHENIX can provide high precision primary/displaced vertex and track reconstruction in the pseudorapidity region of $|\eta| \le 1.1$. The sPHENIX...
Go to contribution page -
Dr Manu Kurian (McGill University)05/09/2023, 17:30
Heavy quarks serve as effective probes of relativistic heavy-ion collisions as they are created in the initial stages of the collision event and exist at all stages. We study the dynamics of heavy flavors using a hybrid framework that incorporates the MARTINI event generator, pythia8.1 for the initial production of heavy quarks, and Langevin dynamics to describe the evolution of heavy quarks...
Go to contribution page -
Dr Yasser Corrales Morales (Los Alamos National Laboratory (US))05/09/2023, 17:30
The sPHENIX experiment will begin commissioning in Spring 2023 at the Relativistic Heavy Ion Collider (RHIC) at BNL, presenting a unique opportunity to study QGP properties using jets and heavy quarks with unprecedented precision. The successful construction and deployment of the three-layer Monolithic-Active-Pixel-Sensor (MAPS) based VerTeX detector (MVTX) for the sPHENIX experiment in 2023...
Go to contribution page -
Prof. Marco Ruggieri (University of Catania)05/09/2023, 17:30
The early stage of high-energy nuclear collisions is dominated by strong gluon fields called the evolving Glasma. This stage can be probed by heavy quarks (HQs), charm and beauty, since they are produced almost immediately by hard scatterings. We study the propagation of HQs in the evolving Glasma fields, by solving the relativistic kinetic equations that couple the HQs to the fields...
Go to contribution page -
Imanol Corredoira (Universidade de Santiago de Compostela (ES))05/09/2023, 17:30
Owing to its spectrometer acceptance, which is complementary to the other
Go to contribution page
LHC experiments, LHCb is collecting several fixed-target and ion collision sam-
ples, providing unique inputs to theoretical models in poorly explored kinematic
regions. In this contribution, the impact of the ongoing and foreseen upgrades
of the LHCb experiment on the ions and fixed-target physics programme... -
Victor Ambrus05/09/2023, 17:30
It is well-known that vorticity induces polarization in quantum plasmas via chiral vortical effect (CVE). Besides the CVE-induced axial current, vorticity gives rise in the presence of a net baryon charge also to a helicity current via the novel helical vortical effect (HVE) [1], which is the focus of the present talk. The HVE and CVE applied together naturally explain the matter/anti-matter...
Go to contribution page -
Cong Yi05/09/2023, 17:30
We investigate the hydrodynamic helicity polarization of Λ hyperons, defined as the projection of the spin polarization vector along the directions of particle momenta, at RHIC-BES energies by utilizing the relativistic (3+1)D CLVisc hydrodynamics framework with SMASH initial conditions. As opposed to local spin polarization at high energy collisions, our hydrodynamic simulations demonstrate...
Go to contribution page -
Cameron Parker05/09/2023, 17:30
In this talk we review the hadronization of jets in various vacuum collision systems using the JETSCAPE event generator and Hybrid Hadronization. Hybrid Hadronization combines quark recombination, applicable when distances between partons in phase space are small, and string fragmentation appropriate for dilute parton systems. It can therefore smoothly describe the transition from very dilute...
Go to contribution page -
Tau Hoshino (Sophia University)05/09/2023, 17:30
Relativistic hydrodynamics has been successful in describing space-time evolution of matter created in high-energy nuclear collisions. It is conventionally supposed that the created matter starts to behave as 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 to the system. According to the...
Go to contribution page -
Gabriel Soares Rocha05/09/2023, 17:30
Relativistic hydrodynamics has been widely employed in high energy nuclear physics, with applications in heavy-ion collisions, neutron star mergers and coalescing matter in black holes [1]. Due to the acausality and instability of relativistic Navier-Stokes (NS) theory [2], one usually employs Israel-Stewart-like (IS) formulations of fluid dynamics [3] in which the constitutive relations for...
Go to contribution page -
Susanne Glaessel05/09/2023, 17:30
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 -
Kosuke Okubo05/09/2023, 17:30
The observation of hyperon polarization has revealed the existence of large vorticities in the medium created by heavy-ion collisions. Global polarization indicates vorticities perpendicular to the reaction plane due to the system's orbital angular momentum, while local polarization indicates vorticities along the beam direction due to anisotropic transverse expansion of the medium. With the...
Go to contribution page -
Ryoka Tokumoto (Hiroshima University (JP))05/09/2023, 17:30
Reconstructing hyperons with high purity and high reconstruction efficiency is essential for measurements of hyperon-hyperon correlation and searches for exotic strange hadrons, which are both presently discussed topics in the QCD community. Hyperons can be abundantly produced in Pb-Pb collisions at LHC. However, achieving high purity of reconstructed hyperons with high efficiency is...
Go to contribution page -
Yue Hang Leung (University of Heidelberg)05/09/2023, 17:30
Hypernuclei, bound states of nucleons and hyperons, serve as a natural laboratory to investigate the hyperon-nucleon ($Y$-$N$) interaction, which is an important ingredient for the nuclear equation-of-state. Furthermore, precise measurements of their production yields in heavy-ion collisions are crucial for understanding their production mechanisms. In addition, the strangeness population...
Go to contribution page -
Chiara Lucarelli (Universita e INFN, Firenze (IT))05/09/2023, 17:30
Antimatter in cosmic rays is a powerful probe for Dark Matter indirect de-
Go to contribution page
tection. To constrain the background from secondary antiparticles, produced
during cosmic ray propagation through the interstellar medium, the related cross
sections need to be precisely determined at accelerator facilities. In particular,
being their secondary production suppressed at low energies with respect... -
Yilun Wu (Vanderbilt University)05/09/2023, 17:30
Measurements of jet substructure in ultra-relativistic heavy ion collisions suggest that the jet showering process is modified by the interaction with quark gluon plasma. Modifications of the hard substructure of jets can be explored with modern data-driven techniques. In this study, we use a machine learning approach to identify jet quenching amounts. Jet showering processes, with and without...
Go to contribution page -
Chunjian Zhang (Stony Brook University)05/09/2023, 17:30
The collective properties of nuclear structure, such as radii and deformations, leave distinct signatures in the initial and consequently final stages of relativistic heavy-ion collisions. Collisions of deformed nuclear enhance the fluctuations of harmonic flow coefficients $v_n$ and event-wise mean transverse momentum $[p_T]$, therefore offering a viable approach to establish clear...
Go to contribution page -
Emma McLaughlin05/09/2023, 17:30
A first goal from early running of the sPHENIX detector, which has begun data-taking this year, is to ensure an accurate calibration of its calorimeters and a complete understanding of the uncertainties associated with these calibrations. Both of these steps are necessary for successfully achieving the physics goals of sPHENIX, especially in conducting various high-precision jet measurements...
Go to contribution page -
Jordi Salinas San Martin05/09/2023, 17:30
The number of hadron resonances used in heavy-ion collisions simulations affects both the final observables and parameters (e.g., transport coefficients) extracted from numerical simulations. This list of resonances is typically taken from the Particle Data Group (PDG) that releases a new list on approximately a yearly basis. Here we update our hadron resonance list to the PDG 2021 including...
Go to contribution page -
James Lawrence Nagle (University of Colorado Boulder)05/09/2023, 17:30
The study of small collision systems at RHIC (pp, pA, dA, $^{3}$HeA, OO) and the LHC (pp, pPb, OO) provide crucial insights into the limits of quark-gluon plasma formation. Recently, we have analyzed new experimental results in terms of hydrodynamics, pre-hydrodynamics, decorrelations, and non-flow (Phys.Rev.C 105 (2022) 2, 024906). We extend these studies to include ultra-peripheral...
Go to contribution page -
Tanner Mengel (University of Tennessee)05/09/2023, 17:30
Previous applications of machine learning to jet background subtraction have shown improvements over the traditional background subtraction methods, especially at low jet momentum. While machine learning applications generally lead to improvements, care must be taken to ensure they are not at the cost of interpretability and bias from models used for training. We present a novel application of...
Go to contribution page -
716. Investigating charm quark production in and outside of jets using the ALICE detector at the LHCJosephina Rae Wright (University of Texas at Austin (US))05/09/2023, 17:30
Heavy-quark hadrons are used to study the properties of the partonic stages of a heavy-ion collision, where a quark-gluon plasma medium is created. We are investigating charm quark production in and outside of jets via angular correlations of trigger hadrons and associated electrons from heavy-flavor hadron decays. As a first step, we are investigating the 5.02 TeV p-Pb collisions, where in a...
Go to contribution page -
104. Investigating collective effects in small collision systems using PYTHIA8 and EPOS4 simulationsAndrea Danu (Institute of Space Science (RO))05/09/2023, 17:30
Studies have yielded strong evidence that a deconfined state of quarks and gluons, the quark--gluon plasma, is created in heavy-ion collisions. This hot and dense matter exhibits almost zero friction and a strong collective behavior. An unexpected collective behavior has also been observed in small collision systems. In this talk, the origin of collectivity in small collision systems is...
Go to contribution page -
Ms Zihui Zhang (Colby College)05/09/2023, 17:30
Jet quenching measurements in heavy-ion collisions, such as the suppression of the jet yield compared to pp collisions, aim to elucidate the various mechanisms of parton energy loss. Differential measurements of the dependence of the inclusive jet nuclear modification factor ($R_{\rm AA}$) on the jet resolution parameter ($R$) may help disentangle energy loss mechanisms and discriminate...
Go to contribution page -
Riccardo Longo (Univ. Illinois at Urbana Champaign (US))05/09/2023, 17:30
In this poster, we present the ATLAS measurement of the centrality dependence of the dijet per-event yield at center-of-mass energy 8.16 TeV in $p$+Pb collisions. The per-event yield of unfolded dijet pairs is presented in terms of kinematic variables that allow for full characterization of the partonic scattering system, i.e. the average $p_{\mathrm{T}}$ of the dijet, $p_{\mathrm{T,Avg}} =...
Go to contribution page -
Satoshi Yano (Hiroshima University (JP))05/09/2023, 17:30
High-energy nucleus-nucleus collision experiments have played a crucial role in exploring high-temperature quark matter, such as the quark-gluon plasma (QGP). The study of various hadrons, characterized by diverse internal structures, constituent quark numbers, and quark species, has been essential for understanding QGP properties. It has become increasingly evident that hadron yields in...
Go to contribution page -
Virginia Bailey (Georgia State University)05/09/2023, 17:30
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 collisions of heavy ions. Jets, produced in hard scatterings early in the collisions, provide an ideal probe for the full evolution of the QGP. sPHENIX is the first detector at RHIC with full coverage electromagnetic and hadronic...
Go to contribution page -
Florian Lindenbauer (TU Wien)05/09/2023, 17:30
The jet quenching parameter $\hat q$ encodes jet medium interactions during the entire quark-gluon plasma evolution in heavy-ion collisions. For a long time, the impact of pre-equilibrium stages has not been properly treated in jet quenching calculations, although recent studies find large values for $\hat q$ in the earliest (glasma) stage. For the first time, we show that QCD kinetic theory...
Go to contribution page -
Noah Applegate (Iowa State University)05/09/2023, 17:30
The new sPHENIX detector at Brookhaven’s National Laboratory’s Relativistic Heavy Ion Collider (RHIC) was designed to significantly further the study of the nature of hot nuclear matter. The use of jets as a probe in p+A and A+A collisions allows access to the interaction of the hard-scattered partons with the nuclear environment and is sensitive to a wide range of scales. sPHENIX will use...
Go to contribution page -
Yixuan Jin (Central China Normal University)05/09/2023, 17:30
In high-energy nuclear collisions, the light nuclei production is sensitive to the temperature and density of the system at freeze-out. It is also predicted to be sensitive to local baryon density fluctuations and can be used to probe the QCD phase transition. The second phase of Beam Energy Scan (BES-II) program at RHIC was completed in 2021. The high-statistics data recorded by the STAR...
Go to contribution page -
Mikko Kuha (University of Jyväskylä)05/09/2023, 17:30
We present a Monte-Carlo implementation of the EKRT initial-state model (MC-EKRT) [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 very successful in describing low-$p_T$ observables at...
Go to contribution page -
Rutik Manikandhan (University of Houston)05/09/2023, 17:30
The mean $p_{\rm{T}}$ fluctuations in heavy-ion collisions can be related to temperature fluctuations which quantify the specific heat of the system. Any deviations from the Hadron Resonance Gas model as a function of the incident energy can be interpreted as a possible signal of criticality. In this poster we present the first efficiency corrected charged particle event-by-event mean...
Go to contribution page -
Tao Fang (Central China Normal University CCNU (CN))05/09/2023, 17:30
Measurements of the production of heavy-flavour hadrons in proton–proton (pp) collisions provide an important test of quantum chromodynamics (QCD).The heavy-flavour production cross section can be calculated using the factorisation approach as a convolution of three factors: the parton distribution functions, the partonic cross section, calculated with perturbative QCD calculations, and the...
Go to contribution page -
Oveis Sheibani (University of Houston (US))05/09/2023, 17:30
Measurements of charm baryon and meson production in pp and p–Pb minimum bias collisions and as a function of multiplicity, help to investigate hadronization processes and to study their modification across the collision systems from pp to Pb–Pb, and from low to high multiplicities.
Go to contribution page
Recent measurements of the fragmentation fractions of charm hadrons in pp and p–Pb challenge the universality... -
Katarzyna Gwizdziel (Warsaw University of Technology (PL))05/09/2023, 17:30
Heavy quarks are produced at the very early stage of heavy-ion collisions, and they experience the whole evolution of the Quark-Gluon Plasma (QGP) created in these collisions. Measurements of the elliptic flow and nuclear modification factor of charmed mesons in heavy-ion collisions at RHIC and the LHC provide ample evidence of strong interactions between charm quarks and the QGP. However, a...
Go to contribution page -
Nicolas Strangmann (Goethe University Frankfurt (DE))05/09/2023, 17:30
By comparing the particle production in pp and p--Pb collisions, nuclear initial state effects can be studied. Measurements of the $\omega$ meson $p_\text{T}$-spectra in pp and p--Pb collisions not only allow for a determination of the nuclear modification factor $R_\text{pA}$, but also provide insight into the fragmentation process and serve as vital input for direct-photon cocktail...
Go to contribution page -
Mr Diptanil Roy (Rutgers University)05/09/2023, 17:30
The properties of the Quark-Gluon Plasma (QGP) produced in heavy-ion collisions can be studied using jets generated in hard scattering processes at the early stages of the collision. These jets lose energy and have their shower structures modified relative to that in the vacuum due to jet-medium interaction — known as `jet quenching'.
The transverse momentum ($p_{\rm T}$) fraction of the...
Go to contribution page -
Chong Kim (Pusan National University (KR))05/09/2023, 17:30
Compared to $\rm{e^+e^-}$ and ep collisions, the charm baryon production in pp collisions shows a substantial enhancement. This evidence is currently interpreted in terms of a modification of the hadronization mechanisms in hadronic collisions. Therefore, valuable information on how the charm quarks hadronize can be studied by measuring charm baryon production. In addition, by sorting out the...
Go to contribution page -
Dandan Shen (Shandong University)05/09/2023, 17:30
$J/\psi$ serves as an important probe to study the properties of the quark-gluon plasma (QGP) created in heavy-ion collisions. In Ru+Ru and Zr+Zr collisions at $\sqrt{s_{NN}} = 200$ GeV, it has been observed that the $J/\psi$ yield is strongly suppressed and its elliptic flow ($v_{2}$) is consistent with zero, indicating $J/\psi$'s strong coupling with the medium and its potentially small...
Go to contribution page -
Mr Li'Ang Zhang (Central ChinaNormal University (CCNU))05/09/2023, 17:30
Two-particle correlation analyses are often used to study the spatial and temporal extension of particle-emitting source in high-energy nuclear collisions. Precise information on the final state interactions amongst the particles under study can also be extracted from the measurement. It is particularly interesting to study the energy dependence of the extracted source size at the moment of...
Go to contribution page -
Dr Subhash Singha (Institute of Modern Physics CAS)05/09/2023, 17:30
Jets are collimated sprays of hadrons fragmented by highly virtual partons produced in the early stage of heavy-ion collisions via hard scatterings. Different observables of the jet-medium interaction probe the properties of the Quark-Gluon Plasma and its dynamics. The bulk medium produced in non-central heavy-ion collisions is expected to be tilted with respect to the beam axis, while the...
Go to contribution page -
Mrs Veronika Prozorova (Czech Technical University in Prague)05/09/2023, 17:30
Studying heavy flavor can enhance our comprehension of parton interactions with the Quark-Gluon Plasma (QGP). Due to their significant mass, heavy quarks (charm and bottom) are mainly generated during the initial phase of high-energy heavy-ion collisions when hard scatterings are prevalent, and experience the entire evolution of the QGP. One way to study the production of heavy quarks is...
Go to contribution page -
Joshua Leon Konig (Goethe University Frankfurt (DE))05/09/2023, 17:30
Particle production in ultra-relativistic pp collisions can be factorized into the parton density function (PDF), the partonic cross-section and the fragmentation function (FF). FFs need to be constrained by experimental data for each particle species. Measurements of the momentum fraction $z$ of a particle species contained in a high energetic jet give direct access to the FF of the...
Go to contribution page -
Renu Bala (University of Jammu (IN))05/09/2023, 17:30
The production of hadrons containing charm or beauty quarks in pp collisions provides an important test for quantum chromodynamics calculations. These measurements also serve as reference for more complex systems such as Pb--Pb collisions, helping to characterize the various in-medium partonic energy loss mechanisms and their dependence on the quark mass.
Go to contribution page
The excellent particle... -
Shuai Yang (South China Normal University)05/09/2023, 17:30
Quarkonia play a unique role in probing the properties of the quark-gluon plasma (QGP). The dissociation of quarkonia due to the color screening was proposed as a direct signature of the QGP formation. On top of that, different states of quarkonium are expected to dissociate at different temperatures depending on their binding energies. Therefore, measurement of the expected sequential...
Go to contribution page -
Tomoki Murakami05/09/2023, 17:30
The mass spectrum of hadrons in finite-density QCD matter is believed to reveal the effects of partial chiral symmetry restoration. However, despite the importance of understanding QCD at finite density, decisive evidence linking the mass spectrum and chiral symmetry is still lacking.
Go to contribution page
The J-PARC E16 experiment aims to fill this gap with high-statistics measurements of vector mesons ($\rho$,... -
Jakub Ceska05/09/2023, 17:30
Measurements of $\Upsilon$ meson production in heavy-ion collisions allow the study of the properties of the quark-gluon plasma, such as in-medium modifications to the QCD force and the medium's thermodynamic properties. However, the quarkonium production mechanism is not completely understood even in vacuum, which is of great interest on its own and could also have significant consequences...
Go to contribution page -
Jaehyeok Ryu (Pusan National University (KR))05/09/2023, 17:30
Measurement of the jet substructure and the distribution of final state hadrons within a jet provide a detailed look into both the partonic shower and hadronisation process. These processes can be studied using the transverse momentum ($j_\mathrm{T}$) and longitudinal momentum fraction ($z$) of constituent particles. ALICE has recently measured the transverse momentum distributions of the jet...
Go to contribution page -
Xiongxiong Xu05/09/2023, 17:30
$\Omega$($\bar{\Omega}$), composed of three strange quarks, serves as a sensitive probe into the characteristics of the quark-gluon plasma (QGP). Measurement of its production can be used to extract the temperature and baryon chemical potential at the chemical freeze-out with the statistical hadronization model, providing information on the QCD phase diagram. Also, the $\Omega$/$\phi$ ratio as...
Go to contribution page -
Sierra Lisa Weyhmiller (Yale University (US))05/09/2023, 17:30
Energetic partons lose energy in the quark-gluon plasma (QGP) and then fragment and hadronize into showers of particles called jets. Measurements of the internal structure of these jets can constrain how energetic partons interact with the QGP. Though species-independent jet substructure measurements have made much progress recently, a complete understanding of the identified particle...
Go to contribution page -
Giovanni Malfattore (University of Bologna and INFN, Bologna (IT))05/09/2023, 17:30
The ALICE detector at the CERN LHC is particularly suited to study light (anti)nuclei produced in high-energy collisions between hadrons. The formation mechanism of (anti)nuclei in these collisions is still one fundamental open question that is being addressed both theoretically and experimentally. This mechanism is investigated by comparing experimental data with phenomenological models such...
Go to contribution page -
Xiaoning Wang (Univ. Illinois at Urbana Champaign (US))05/09/2023, 17:30
The initial QGP geometry of the quark-gluon plasma (QGP) is manifested as azimuthal anisotropy in final state particles of a nuclear collision in the plane transverse to the beam direction. This study measures the Fourier coefficients $v_{2}$ and higher order harmonics of charged particle distribution in Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV with 2018 data collected by the...
Go to contribution page -
Xin Wu (University of Science and Technology of China)05/09/2023, 17:30
Relativistic heavy-ion collisions generate extremely strong electromagnetic fields, providing an ideal environment to study the electromagnetic excitation of the vacuum. Furthermore, the electromagnetic fields are sensitive to the charge distributions of the colliding nuclei which can be used to study the nuclear structure. The Breit-Wheeler process, the lowest-order decay mode of the QED...
Go to contribution page -
Zhengxi Yan05/09/2023, 17:30
The study of the Quark-Gluon Plasma (QGP) properties is a fundamental aspect of high-energy nuclear physics. However, the understanding of QGP formation and evolution is still limited by various uncertainties in the initial stages of the collision. One approach to gain more insights into the initial stages is to study small-sized systems, which, due to their reduced system size and lifetime,...
Go to contribution page -
Xiujun Li (USTC)05/09/2023, 17:30
Hypernuclei, bound states of nuclei with one or more hyperons, serve as a natural laboratory to investigate the hyperon-nucleon ($Y$-$N$) interaction, an important ingredient for the equation-of-state (EoS) of nuclear matter. Precise measurements of hypernuclei properties and their production yields in heavy-ion collisions are crucial for the understanding of their production mechanisms and...
Go to contribution page -
Yuan Zhang (University of Science and Technology of China (CN))05/09/2023, 17:30
Quarkonium production in high-energy proton-proton (pp) collisions is an important tool for studying perturbative and non-perturbative aspects of quantum chromodynamics (QCD) calculations. Charmonia are bound states of charm and anti-charm quark pairs. Their production process can be factorized into two stages: the heavy quark production and the formation of the bound state. The former...
Go to contribution page -
Tristan Protzman (Lehigh University)05/09/2023, 17:30
Hard partonic scatterings, occurring at the early stages of heavy-ion collisions, produce jets, which experience the full evolution of the quark-gluon plasma (QGP). As they traverse through the QGP, jets lose energy through collisional and radiative processes, collectively known as the jet quenching. In semi-central heavy-ion events, the QGP takes an approximately elliptical shape in the...
Go to contribution page -
Yuko Sekiguchi (University of Tokyo (JP))05/09/2023, 17:30
Measurements of long-range angular correlations are one of the important tools to evaluate the interplay between the initial- and final-state effects in small collision systems in view of understanding the evidence of collectivity.
Go to contribution page
The charged-particle multiplicity distribution as a function of pseudorapidity ($\eta$) is asymmetric in p--Pb collisions. Since the mean free path depends on... -
Daniel Firak05/09/2023, 17:30
As a part of the studies of the small systems ($p$, $d$, and $^3\text{He}+\text{Au}$), in this poster we present the preliminary yields of $\pi^0$ and direct $\gamma$ for the $\sqrt{s_{NN}}=200$ GeV $^3\text{He}+\text{Au}$ PHENIX data, as well preliminary nuclear modification factor ($R_{xA}$) for this system. We will discuss the unfolding procedure to obtain such yields from raw data in a way...
Go to contribution page -
Jing An (Central China Normal University)05/09/2023, 17:30
Two-particle correlation analyses are often used to study the spatial and temporal extents of the particle-emitting source in high-energy nuclear collisions. Information on the final state interactions amongst the particles under study can also be extracted from the measurement. For example, from the p-$\Lambda$ and p-$\Xi^-$ correlation functions, one could study the hyperon-nucleon (Y-N)...
Go to contribution page -
Youquan Qi05/09/2023, 17:30
Femtoscopic measurements are sensitive to the spatial and temporal characteristics of the particle emitting-source, allowing us to probe the properties of the matter created in heavy-ion collisions. If QCD transition takes place, the time scale for pion emission is expected to increase significantly. Therefore, it will help us understand the properties of the QGP and the nature of the QCD...
Go to contribution page -
Mathias Labonte05/09/2023, 17:30
One of the main physics goals of the Beam Energy Scan (BES) at RHIC is to study the phase diagram of the QCD matter, which separates a phase of quark-gluon plasma (QGP) from a phase of hadronic gas. The first phase of BES studied Au+Au collisions from center-of-mass energy ($\sqrt{s_{_{\rm{NN}}}} $) of 7.7 to 62.4 GeV. The BES Phase-II extended these measurements in several important ways,...
Go to contribution page -
Weiguang Yuan (清华大学)05/09/2023, 17:30
$\quad$The $\phi$ vector meson is the lightest bound state of hidden strangeness, consisting of a ($s\bar{s}$) quark-antiquark pair. It has a long lifetime (46 fm/c) and relatively small hadronic interaction cross section. Therefore, it is less susceptible to final-state effects and can be used to study the early evolution of the system. In addition, coalescence model calculations indicate...
Go to contribution page -
C.W. Robertson (Purdue University)05/09/2023, 17:30
In non-central Heavy-Ion collisions, a large orbital angular momentum is produced. A part of the orbital angular momentum can polarize the quarks and anti-quarks, hence the vector mesons, inside the medium. Recently, STAR measured the global spin alignment of φ(1020) mesons in Au+Au collisions from the first phase of the RHIC Beam Energy Scan I (BES I) program [1].
The global spin...
Go to contribution page -
Andrew Tamis (Yale University)05/09/2023, 17:30
Hard-scattered partons ejected from high-energy collisions undergo fragmentation and hadronization, resulting in collimated sprays of particles that are clustered into jets. The Energy-Energy correlator (EEC) is a jet substructure observable used to study the time evolution of the parton shower. This observable re-contextualizes jet substructure study by using the distribution of angular...
Go to contribution page -
Xiaojun Yao (University of Washington)05/09/2023, 17:30
When a jet injects energy and momentum into a droplet of QGP, it generates a wake that, after the QGP hadronizes, results in the creation of soft and semi-hard particles correlated with the jet direction. This medium response phenomenon plays a crucial role in describing various jet observables, as demonstrated by many jet quenching studies. However, the computational complexity of current...
Go to contribution page -
Sanghoon Lim (Pusan National University (KR))05/09/2023, 17:30
Quarkonia have been long considered as key features in heavy ion collision to study the properties of the quark-gluon plasma. One of the key signatures is the sequential yield suppression for different quarkonium states in nucleus-nucleus (A+A) collisions compared to p+p collisions following the ordering of their binding energies. Moreover, sequential yield modification has also been observed...
Go to contribution page -
Mr Volodymyr Kuznietsov (Bogolyubov Institute for Theoretical Physics of the National Academy of Sciences of Ukraine)05/09/2023, 17:30
We study the critical point effects on particle number fluctuations both in the crossover ($T > T_{\rm c}$) and mixed phase ($T < T_{\rm c}$) regions by means of molecular dynamics simulations of a Lennard-Jones fluid, motivated by the ongoing search for the QCD critical point in heavy-ion collisions.
In the crossover region, we find large fluctuations associated with the critical point in...
Go to contribution page -
Yuki Fujimoto (University of Washington)05/09/2023, 17:30
Large-$N_c$ QCD implies a duality between confined baryons and deconfined quarks at high baryon densities; it is called Quarkyonic matter. We present a model of Quarkyonic matter that is explicitly dual between quarks and baryons. The duality means that the free energy of the matter is expressed in two ways: One is as a functional of the quark distribution function in the momentum space,...
Go to contribution page -
Ms Pushpa Panday05/09/2023, 17:30
We have studied the momentum transport coefficients, viz. shear and
Go to contribution page
bulk viscosity, in a weakly magnetized ($eB << T^2$) deconfined thermal
QCD medium at finite quark chemical potential ($\mu$). The magnetic
field generates anisotropy in the medium, causing the previously
isotropic scalar transport coefficients to become anisotropic and separate into several components. Depending upon... -
Axel Puntke (WWU Münster)05/09/2023, 17:30
The Compressed Baryonic Matter (CBM) experiment at FAIR will investigate the QCD phase diagram at high net-baryon densities ($μ_B$ > 500 MeV) with heavy-ion collisions in the energy range $\sqrt{s_{NN}} = 2.9−4.9$ GeV. Precise determination of dense baryonic matter properties requires multi-differential measurements of strange hadron yields and their collective flow, both for the most...
Go to contribution page -
Antonio Ortiz Velasquez (Universidad Nacional Autonoma (MX))05/09/2023, 17:30
Event classifiers based either on the charged-particle multiplicity or on event topologies, such as spherocity and Underlying Event, have been extensively used in proton-proton (pp) collisions by the ALICE Collaboration at the LHC. These event classifiers became very useful tools since the observation of fluid-like behavior in high multiplicity pp collisions, for example radial and anisotropic...
Go to contribution page -
Prof. Anders Garritt Knospe (Lehigh University)05/09/2023, 17:30
Studying quarkonium production allows us to probe the properties of strongly interacting matter, such as the quark-gluon plasma and the gluonic matter in heavy nuclei. While such a probe is widely used, a complete understanding of the quarkonium production mechanism is not yet achieved, even for $p$+$p$ collisions. Therefore, quarkonium studies in $p$+$p$ collisions are essential for advancing...
Go to contribution page -
Jaeyoon Cho (Inha University (KR))05/09/2023, 17:30
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...
Go to contribution page -
Banajit Barman (Gauhati University (IN))05/09/2023, 17:30
In nucleus-nucleus collisions at LHC energies, a deconfined state of matter, the quark-gluon plasma (QGP), is formed. Generally, proton-proton (pp) collisions are used as a reference to study their fundamental properties. However, at the highest energy reached in LHC Run 2, pp collisions at high multiplicity seemed to exhibit signatures of collective phenomena similar to those observed in...
Go to contribution page -
Anthony Hodges05/09/2023, 17:30
sPHENIX is a new detector at the Relativistic Heavy-Ion Collider (RHIC) designed to make precision jet and upsilon measurements in 200 GeV p + p, p + Au, and Au + Au collisions and will begin taking data in 2023. In addition to having the first hadronic calorimeter (HCal) at mid-rapidity at RHIC, sPHENIX also contains a tungsten-scintillator based Electromagnetic Calorimeter (EMCal) for...
Go to contribution page -
Dading Chen05/09/2023, 17:30
Direct photons are useful probes to study the properties of QGP and the dynamic evolution of collision systems. Estimating and subtracting direct photons from hadron decays that contribute to the bulk of the measured photons is crucial and challenging. Although the most abundant source, $\pi^{0}$ $\rightarrow$ $\gamma$$\gamma$ is well studied and constrained. $\eta$ $\rightarrow$...
Go to contribution page -
Dr Niseem Magdy Abdelrahman (Stony Brook University)05/09/2023, 17:30
Constraining the three-dimensional structure of the initial state and transport properties of the Quark-Gluon Plasma (QGP) at different temperatures ($T$) and baryon chemical potentials ($\mu_B$) is a critical objective of heavy-ion programs at RHIC and the LHC. This work presents comprehensive measurements on both topics for various event-shape and centrality selections of Au+Au collisions at...
Go to contribution page -
Dr. Tianxi Zhang05/09/2023, 17:30
A quark is a subatomic particle, composed of the mass, electric charge, and color charge, the three fundamental elements found in the nature. Among these three fundamental elements, there are four fundamental interactions, which are the gravitational force between masses, the electromagnetic force between electric charges, the strong force between color charges, and the weak force between...
Go to contribution page -
Takuya Kumaoka (University of Tsukuba (JP))05/09/2023, 17:30
To be added by ALICE
Go to contribution page -
MAHIMA SHARMA (University of Jammu)05/09/2023, 17:30
Two particle femtoscopy provide a powerful tool for studying the space–time dynamics of the hot and dense matter (QGP) created in these collisions such as the size, shape, and lifetime as well as advancing our understanding of the behavior of matter at extreme conditions by measuring the relative momentum correlations between pairs of particles emitted in the same direction from the collision....
Go to contribution page -
Gang Wang (UCLA)05/09/2023, 17:30
The widely used Fourier expansion for studying collective motions in heavy-ion collisions implies that different modes of collectivity could be non-interdependent, driven by factorized actions in the created nuclear medium. Following this line of thought, we assume each non-dependent collective motion modulates the probability of particle emission with a single-harmonic Fourier expansion, and...
Go to contribution page -
Biaogang Wu (Texas A&M University)05/09/2023, 17:30
We perform a non-perturbative calculation of quarkonium dissociation rates in the quark-gluon plasma (QGP) within a thermodynamic T-matrix approach. The latter resums an infinite series of ladder diagrams for heavy-light interactions appropriate for a strongly coupled QGP which are implemented via half-off-shell amplitudes accounting for recoil corrections and interference effects (related to...
Go to contribution page -
Wenda Guo (Central China Normal University CCNU (CN))05/09/2023, 17:30
The study of the production of non-prompt ${\rm J/\psi}$ originating from the decay of beauty hadrons, besides allowing to isolate the prompt ${\rm J/\psi}$ cross section from the inclusive ${\rm J/\psi}$ cross section, can be used to estimate open beauty-hadron production. Heavy-flavour particle production in pp collisions as a function of charged-particle multiplicity could provide insight...
Go to contribution page -
Dr David Tlusty (Creighton University)05/09/2023, 17:30
One of the most pressing questions in both hot and cold QCD communities is what the physics mechanism responsible for modified parton densities in heavy nuclei is. One promising channel to address this question is the photoproduction of vector mesons, which is considered a clean probe to the nuclear parton structures.
Go to contribution page
We present a measurement of $\pi^+\pi^-\pi^+\pi^-$ photonuclear... -
Giuliano Giacalone (Universität Heidelberg)05/09/2023, 17:30
Collective flow is observed in high-energy proton-proton and proton-nucleus collisions where particle multiplicities are small and a quark-gluon plasma description is hard to justify. Here, we address the origin of such observations from a new angle, by performing an experimental investigation of the emergence of hydrodynamics in two-dimensional ultra-cold Fermi gases with with controllable...
Go to contribution page -
Matthew Nickel (The University of Kansas (US))05/09/2023, 17:30
Ultraperipheral nucleus-nucleus collisions produce very large photon fluxes such that fundamental quantum-mechanical processes can be observed and studied in a novel way. In this presentation, an observation of the $\tau$ lepton photoproduction at LHC is reported, using ultraperipheral lead-lead collision data collected by CMS. This measurement paves the way for a precise determination of the...
Go to contribution page -
Piotr Gasik (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))05/09/2023, 17:30
On the gravitational wave emission in the magnetic field
of a heavy-ion collisionIn the classic 1961 paper of Gertsenshtein [1] he demonstrated that an electromagnetic wave can be transformed into a gravitational wave when propagating through an external, transverse magnetic field. Later in 1973, Zel’dovich calculated the fraction of energy of the electromagnetic wave transformed into the...
Go to contribution page -
Oskar Hartbrich (Oak Ridge National Lab)05/09/2023, 17:30
The ePIC detector is being designed as a hermetic, general-purpose detector for the Electron-Ion Collider (EIC). One of the key performance drivers for the physics programme at the EIC are the particle identification (PID) system, which enable the separation of pions, kaons, and protons in high multiplicity events over a wide phase space, with significant pion/electron suppression. To address...
Go to contribution page -
JongHo Oh (Pusan National University)05/09/2023, 17:30
The simple picture of a hard scattering per $p+p$ collision has been challenged by several measurements performed at LHC and RHIC, revealing a more complex dynamics of multiple parton interactions (MPI) which are essential to fully understanding particle production in hadronic collisions. Hard probe measurements at different particle multiplicity regimes in $p+p$ collisions provide a clean...
Go to contribution page -
Jing Wu (lanzhou university)05/09/2023, 17:30
Jet quenching parameter $\hat{q}$ is essential for characterizing the interaction strength between jet partons and nuclear matter. Based on the quark-meson (QM) model, we develop a new framework for calculating $\hat{q}$ at finite chemical potentials, in which $\hat{q}$ is related to the spectral function of the chiral order parameter. A perturbative calculation up to the one-loop order...
Go to contribution page -
Ida Storehaug (University of Oslo (NO))05/09/2023, 17:30
The $B^\pm$ meson is produced more frequently than any other meson containing beauty quarks in pp collisions at the LHC. Measuring its production cross-section is important for two reasons. Firstly, it allows for testing perturbative quantum chromodynamics calculations. Secondly, it provides an essential reference for measurements of its nuclear modification factor ($R_{\rm A \rm A}$) in...
Go to contribution page -
Sanghoon Lim (Pusan National University (KR))05/09/2023, 17:30
Identified hadrons have proven to be useful in elucidating the final state effects of heavy ion collisions. This includes in particular the important role that hadronization plays on a variety of final state observables. System size is known to influence various observables, and the overlap in system size between different collision systems has helped establish the commonality between them,...
Go to contribution page -
Nandagopal Vijayakumar05/09/2023, 17:30
Experimental observations indicate that quark-gluon plasma produced in heavy-ion collisions has high vorticity and is subject to an intense magnetic field. We present a study of the photon radiation by a charged fermion rotating with the plasma in a constant magnetic field B. The angular velocity of rotation is assumed to be much smaller than the inverse magnetic length, which allows us to...
Go to contribution page -
Shuo Lin05/09/2023, 17:30
We investigate the photoproduction of di-electrons in peripheral collisions of $^{96}_{44}$Ru+$^{96}_{44}$Ru and $^{96}_{40}$Zr +$^{96}_{40}$Zr at 200 GeV. With the charge and mass density distributions given by the calculation of the density functional theory, we calculate the spectra of transverse momentum, invariant mass and azimuthal angle for di-electrons at 40-80% centrality. The ratios...
Go to contribution page -
Minjung Kim (University of California Berkeley (US))05/09/2023, 17:30
Central exclusive production (CEP) is a diffractive process in which the colliding particles remain intact. Three different processes are involved: photon-photon exchange, photon-pomeron exchange and double-pomeron exchange. Each process produces distinguishable states with specific sets of quantum numbers, making CEP measurements a unique tool for searching for exotic resonances. Furthermore,...
Go to contribution page -
Konstantin Maslov (University of Houston)05/09/2023, 17:30
We study the contribution to the equation of state from mesonic correlations in the Polyakov-loop Nambu--Jona-Lasinio model within the Beth-Uhlenbeck approach, with a focus on the spacelike region of the spectral function. We show that the inclusion of such excitations leads to a significant increase of the pressure of the model near the pseudocritical temperature of the chiral phase...
Go to contribution page -
Kayman Gonçalves05/09/2023, 17:30
We argue that spin alignment of hadrons of spin 1 and higher provide a unique window into the study of hydrodynamics with spin, because it is capable to probe non-equilibrium between spin density and vorticity.
Go to contribution page
This happens because most of the full 3X3 density matrix is in principle accessible experimentally, and non-zero off-diagonal matrix elements can be directly linked to such... -
Oleh Fedkevych (Georgia State University)05/09/2023, 17:30
With the newly upgraded sPHENIX detector capable of performing high precision jet substructure measurements, we present a comprehensive and systematic jet substructure study at the Relativistic Heavy Ion Collider. The study includes a variety of key jet substructure variables such as jet angularities with and without soft-drop or collinear-drop grooming, as well as recoil-free di-jet and...
Go to contribution page -
Victor Gonzalez (Wayne State University (US))05/09/2023, 17:30
Two-particle number and transverse momentum correlations are sensitive probes of particle production and transport in AA collisions. Their shape and strength are sensitive to the interplay of all production processes, and are further influenced by transport mechanisms, including longitudinal, radial, and anisotropic flow. However, the correlations are also sensitive to instrumental effects,...
Go to contribution page -
Youqi Song05/09/2023, 17:30
Jets are collimated sprays of final-state particles produced from initial high-momentum-transfer partonic scatterings in particle collisions. Since jets are multi-scale objects that connect asymptotically free partons to confined hadrons, jet substructure measurements in vacuum can provide insight into the parton evolution and the ensuing hadronization processes. With $\sqrt{s} = 200$ GeV $pp$...
Go to contribution page -
Shubhalaxmi Rath (Indian Institute of Technology Bombay)05/09/2023, 17:30
We have probed the effect of the nonextensivity on the transport properties related to the charge and heat in hot QCD medium at finite magnetic field and chemical potential. The coefficients associated with the charge and heat transport, such as the electrical conductivity, Hall conductivity, thermal conductivity and Hall-type thermal conductivity are determined using the nonextensive Tsallis...
Go to contribution page -
Prof. Claude Andre Pruneau (Wayne State University (US))05/09/2023, 17:30
Charge balance functions (BFs) were introduced at the beginning of the RHIC era as a tool to investigate the evolution of particle production in heavy-ion collisions and identify the presence of delayed hadronization as an indicator of the formation of long lived isentropic expanding quark gluon plasma in high-energy nucleus-nucleus (A--A) collisions. It later emerged that BFs are rather...
Go to contribution page -
Ms Bushra Ali (Aligarh Muslim University (IN))05/09/2023, 17:30
The study of event-by-event fluctuations of the mean transverse momentum, $\langle p_{\rm{T} }\rangle$, could probe the nature of the phase transition and seek evidence for temperature fluctuations. In this talk, event-by-event $\langle p_{\rm{T} }\rangle$ and higher order fluctuations of charged particles produced in pp collisions at $\sqrt{s}=5.02$ TeV, Xe--Xe collisions at...
Go to contribution page -
Sumit Basu (Lund University (SE))05/09/2023, 17:30
Two-particle transverse momentum correlator $G_{2}$ was measured based on data collected from Pb--Pb collisions at $\sqrt{s_{\rm NN}} = 2.76\;\text{TeV}$. The evolution of the longitudinal width of the $G_{2}$ correlator vs. collision centrality nominally provides information about the specific shear viscosity, $\eta/s$, of the medium formed in the collisions. The $G_{2}$ correlator was also...
Go to contribution page -
Benedict Heybeck (Goethe University Frankfurt (DE))05/09/2023, 17:30
The strangeness content of the final state in ultrarelativistic heavy ion collisions has been studied through measurements of kaons, Λ, Ξ and Ω baryons in pp, pA and AA collisions. $\Sigma$ baryons contain a single strange quark and form a triplet, with the charge (+, 0, -) depending on the light quark content. In a thermal model scenario, these states are abundant enough to carry a...
Go to contribution page -
Omar Vazquez Rueda (University of Houston (US))05/09/2023, 17:30
Measurements of high-multiplicity pp and pA collisions at LHC energies have revealed that these small collision systems exhibit some quark-gluon plasma-like features, such as collective behaviour and strangeness enhancement, formerly thought to be achievable only in nucleus-nucleus collisions. A proposed method to narrow down the origin of these phenomena is to study the effect of MultiParton...
Go to contribution page -
Rajendra Nath Patra (University of Jammu (IN))05/09/2023, 17:30
Light-flavor hadrons constitute the bulk of the particles produced in high energy hadronic collisions at LHC. Recent studies show that in high multiplicity pp and p—Pb collisions at LHC energies, particle production exhibits features that mimic the behaviors observed in AA collisions (e.g., mass-dependent pT hardening and strangeness enhancement). These features are a typical sign of the...
Go to contribution page -
Ananya Rai (Yale University (US))05/09/2023, 17:30
The sequential clustering of particles into jets offers an algorithmic connection of hadrons to the partons of the radiation shower. Jet substructure allows us to access the radiation history of a jet thereby providing a useful avenue to probe QCD through different energy scales. The N-point Energy Correlator (ENC) is a recently proposed observable that highlights this feature of jets as a...
Go to contribution page -
Marika Rasa (University and INFN Catania)05/09/2023, 17:30
The production of light (anti)nuclei in high-energy hadronic collisions has been studied in depth with the ALICE experiment at the LHC. Despite this, the production mechanism of light (anti)nuclei is still not well understood and remains a highly-discussed topic in the scientific community. One of the phenomenological models typically used to describe the hadronization process is the...
Go to contribution page -
Roberta Arnaldi (Universita e INFN Torino (IT))05/09/2023, 17:30
The NA60+ experiment, proposed for data taking in the next years, aims to investigate the high baryochemical potential region of the QCD phase space diagram, exploiting the large intensity of CERN SPS beams.
NA60+ will have the possibility to access the high $\mu_{B}$ region of the QCD phase diagram, by studying rare probes via a beam-energy scan with PbPb and p-A collisions in the...
Go to contribution page -
Dr ZHONGLING JI (UCLA)05/09/2023, 17:30
The proton-endcap Electromagnetic Calorimeter (pECal) of the ePIC experiment at the future Electron-Ion Collider (EIC) will cover the pseudorapidity range of 1.3 $< \eta <$ 4 in the hadron-going direction. In semi-inclusive deep inelastic scattering, the pECal is essential for measuring jets and heavy quarks in the hadron-going direction. These physics measurements require the pECal to have a...
Go to contribution page -
Yu Zeng (Central China Normal University)05/09/2023, 17:30
Correlation function of baryons has been used in heavy-ion collisions to study the space-time structure, the dynamical evolution of the particle-emitting source, and final state interactions.
In this poster, we will present correlation functions of protons in Au+Au collisions at $\sqrt{s_{NN}}$ = 3.2 GeV from the second phase of the beam energy scan (BES-II) at STAR. The Lednicky-Lyuboshitz...
Go to contribution page -
Jeongsu Bok (Pusan National University (KR))05/09/2023, 17:30
The pseudorapidity density of charged particles with different values of minimum transverse momentum ($p_\mathrm{T}$) thresholds of 0.15, 0.5, 1, and 2 GeV/c is measured in pp collisions at $\sqrt{s} =$ 5.02 and 13 TeV with the ALICE Run 2 set-up. The study is carried out for inelastic collisions with at least one primary charged particle having a pseudorapidity ($\eta$) within ±0.8 and...
Go to contribution page -
Mr SUMIT N/A (IIT Roorkee)05/09/2023, 17:30
Chiral symmetry is lost at low temperatures, and pions are massless in the chiral limit; there is no longer any screening mass. The screening mass of mesons approaches the standard value of $2 \pi T$ at high temperatures. The screening masses of mesons provide a gauge invariant and definite order parameter of chiral symmetry restoration. Different mesonic correlation lengths for flavor...
Go to contribution page -
MUHAMMAD Shumail Khan05/09/2023, 17:30
The sPHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) is designed to study the properties of quark-gluon plasma (QGP) created in heavy-ion collisions. sPHENIX is equipped with tracking detectors and calorimetry, which allow for precise measurements of particles produced in the collision. In particular, the electromagnetic and hadronic calorimeters are crucial for reconstructing...
Go to contribution page -
Peter Vander Griend05/09/2023, 17:30
For decades, heavy quarks and their bound states have served as ideal experimental and theoretical probes of the medium formed in heavy ion collisions. Specifically, suppression of heavy-heavy bound states in heavy ion relative to proton-proton collisions was postulated as a strong signal of the formation of a deconfined quark gluon plasma. More recently, the use of effective field theories...
Go to contribution page -
Alexandre Lebedev (Iowa State University (US))05/09/2023, 17:30
Quarkonia measurements in heavy-ion collisions are important for understanding both initial-state effects on heavy-quark production and final-state interactions between heavy quarks and the hot and dense nuclear matter created in high-energy heavy-ion collisions.
The sPHENIX experiment at RHIC will begin its commissioning and first Au+Au data-taking run in 2023, and plans to measure the...
Go to contribution page -
Paulo De Moura (University of Campinas)05/09/2023, 17:30
We examine in detail the mass, lifetime and spin structure of quarkonium in a rotating vortical medium, where the quark spin is not necessarily aligned with the vortex.
Go to contribution page
After justifying this set-up in terms of spin hydrodynamics, and outlining the expected dependence of spin and vorticity, we examine the mass, lifetime and spin density matrix of quarkonium.
Our analysis implies a novel... -
Deekshit Kumar (Department of Atomic Energy (IN))05/09/2023, 17:30
Quarkonium production in high-energy hadronic collisions is sensitive to both perturbative and non-perturbative aspects of quantum chromodynamics (QCD) calculations. Indeed, 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 available theoretical models. Quarkonium...
Go to contribution page -
Arjun Sengupta05/09/2023, 17:30
In this study, we investigate if machine learning can be used to reconstruct aspects of jet history. The space-time evolution of a jet shower is directly linked to local properties of the surrounding medium. Extracting the evolution poses a challenge, since experimentally we only have access to the final state hadron momenta. On the other hand, Monte Carlo simulations model the jet history in...
Go to contribution page -
Asanosuke Jinno05/09/2023, 17:30
We investigate the validity of the repulsive $\Lambda$ potential at high densities which suppresses $\Lambda$ in dense neutron star matter by investigating whether it reproduces the heavy-ion collision and the hypernuclear data.
In the 20th cenury, $\Lambda$ baryon was predicted to appear in neutron star matter at $2$-$4\rho_0$ from the hypernuclear spectroscopy and the phenomenology of...
Go to contribution page -
Xiaofeng Wang (Shandong University)05/09/2023, 17:30
In ultra-relativistic heavy-ion collisions, strong electromagnetic fields arising from the Lorentz-contracted, highly charged nuclei can be approximated as a large flux of high-energy quasi-real photons that can interact via the Breit-Wheeler process to produce $e^{+}e^{-}$ pairs. The collision energy dependence of the cross section and the transverse momentum distribution of dielectrons from...
Go to contribution page -
Maxim Virta (University of Jyväskylä)05/09/2023, 17:30
The transport properties of the quark-gluon plasma, which is produced in heavy-ion collisions, provide crucial information about quantum chromodynamics (QCD). Bayesian analysis has been highly effective in constraining QCD matter properties [1, 2]. When combined with additional flow observables, LHC Pb-Pb data at 5.02 and 2.76 TeV have significantly reduced the uncertainties [2]. However, our...
Go to contribution page -
Dong Jo Kim (University of Jyvaskyla (FI))05/09/2023, 17:30
Collisions of small systems show signatures suggestive of collective flow associated with QGP formation in heavy-ion collisions. Jet quenching is also a consequence of QGP formation, but no significant evidence of it in small systems has been found to date. Measuring or constraining the magnitude of jet quenching in small systems is essential to determine the limits of QGP formation. The ALICE...
Go to contribution page -
Han-Sheng Li05/09/2023, 17:30
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 (QCD). The CME-sensitive observable, charge-dependent three-point azimuthal correlator $\Delta\gamma$, is contaminated by a major physics background proportional to the particle elliptic anisotropy...
Go to contribution page -
Hitansh Shah05/09/2023, 17:30
We present a study of the spectral properties of the quark and meson excitations within the Nambu--Jona-Lasinio model. The pertinent spectral functions are obtained by solving self-consistently the Dyson equation for the quark propagator at the one-loop level and the Bethe-Salpeter equation for the quark-antiquark T-matrix, which describes mesons as dynamically generated bound states. The...
Go to contribution page -
Ms Isabella Danhoni05/09/2023, 17:30
Transport coefficients, such as viscosity, can be calculated theoretically in weakly coupled quantum field theory, and present interesting information about hydrodynamic models of heavy-ion collisions. We present results for shear viscosity calculations at almost leading order in weakly coupled QCD in a regime of high baryon density, where the chemical potentials are greater than the...
Go to contribution page -
Aranya Giri (University of Houston)05/09/2023, 17:30
A crucial component to the Electron Ion Collider (EIC) program is the collider luminosity, with a target absolute (relative) uncertainty of less than 1% (exceeding 10⁻⁴ in precision). The luminosity determination will be achieved employing two complementary approaches, one by direct detection of bremsstrahlung photons and another using a Pair Spectrometer (PS) which utilizes e+e- conversions...
Go to contribution page -
Daniel Lis05/09/2023, 17:30
The new sPHENIX detector at RHIC will begin commissioning with Au+Au collisions at 200 GeV in Spring 2023. The sPHENIX trigger system is paramount to the success of the sPHENIX physics program. A system of custom digital Local Level-1 electronics (LL1) will enable trigger primitive generation related to interaction selection, jets, photons, hadrons, and Upsilons to pass to the Global Trigger...
Go to contribution page -
Hanpu Jiang (Columbia University)05/09/2023, 17:30
The sPHENIX experiment is comprised of two layers of hadronic calorimeters (HCal). The outer HCal is the outermost layer located outside the solenoid coil, and the inner HCal is positioned between the solenoid magnet and the Electromagnetic Calorimeter. The sPHENIX program, aimed at achieving precise jet measurements and analyzing the microscopic properties of the strongly interacting...
Go to contribution page -
Jaehyun Kim (Yonsei University (KR))05/09/2023, 17:30
The sPHENIX experiment has achieved a major milestone with the construction and installation of the cutting-edge three-layer Monolithic-Active-Pixel-Sensor (MAPS) based VerTeX detector (MVTX) in April 2023, in preparation for first beam in Spring 2023. The MVTX is the innermost tracking detector, boasting a spatial resolution of 5 $\mu$m and covering 2.5-4.0 cm radially, and a pseudorapidity...
Go to contribution page -
Di-Lun Yang (Institute of Physics, Academia Sinica)05/09/2023, 17:30
We explain how spin alignment of vector mesons can be induced by background color fields. Our study is based on the quantum kinetic theory of spinning quarks and antiquarks and incorporates the relaxation of the dynamically generated spin polarization. The spin density matrix of vector mesons is obtained by quark coalescence via the Wigner function and kinetic equation. Our approach predicts a...
Go to contribution page -
Cynthia Nunez (University of Michigan (US))05/09/2023, 17:30
Transverse Λ polarization observed over four decades ago contradicted expec-
Go to contribution page
tations from early leading-order perturbative QCD calculations. Measurements
of Λ polarization from unpolarized pp and pA collisions have been previously
observed to increase as a function of xF and pT up to a few GeV range and
approximately independent of beam energy. Recent studies have linked polar-
ization to... -
Fernando Flor (Yale University)05/09/2023, 17:30
The validity of the Statistical Hadronization Model (SHM) has been successfully tested to adequately reproduce hadronic particle abundances over nine orders of magnitude in high energy collisions of heavy ions. Assuming a thermally equilibrated system, experimental particle yields at RHIC and the LHC serve as an anchor for the determination of common freeze-out parameters in the QCD phase...
Go to contribution page -
Zachary Sweger (University of California, Davis)05/09/2023, 17:30
Higher-order fluctuations of the net-proton number distributions in heavy-ion collisions are expected to be sensitive to a QCD critical point. These fluctuations can be obtained by measuring various order of cumulants, $C_n$, of the net-proton multiplicity distributions. The collision energy dependence of net-proton $C_4/C_2$ from Beam Energy Scan I hints at a possible enhancement from...
Go to contribution page -
Ishu Aggarwal05/09/2023, 17:30
Strangeness production has been suggested as a sensitive probe to the dynamics of the deconfined matter created in heavy-ion collisions. Ratios of particle yields involving strange particles are often utilized to study properties of the nuclear matter at freeze-out, such as the strangeness chemical potential and the chemical freeze-out temperature. The $d$+Au collisions bridge the...
Go to contribution page -
Chiara De Martin (Universita e INFN Trieste (IT))05/09/2023, 17:30
The ratio between (multi-)strange and non-strange hadron yields increases with the multiplicity of charged particles produced in hadronic collisions, revealing a smooth transition from low multiplicity pp collisions to central Pb-Pb collisions. The microscopic origin of this behaviour, known as strangeness enhancement, has yet to be understood. The data collected by the ALICE experiment during...
Go to contribution page -
Yi Fang05/09/2023, 17:30
One main motivation of the Beam Energy Scan (BES) program at RHIC is to search for the QCD critical point and the onset of deconfinement. Strangeness production has been suggested as a sensitive probe to the early dynamics of the deconfined matter created in heavy-ion collisions. Ratios of particle yields involving strange particles are often utilized to study various properties of the nuclear...
Go to contribution page -
Ms Pratibha Bhagat (University of Jammu)05/09/2023, 17:30
The production of strange quarks and antiquarks in high-energy collisions of
Go to contribution page
heavy ions is a significant indicator for the creation of a state of matter known
as Quark-Gluon Plasma (QGP). The QGP is characterized by the liberation of
quarks and gluons from their confinement inside hadrons. Due to their prompt
decay via weak interactions, strange quarks and antiquarks are not present... -
Ashish Jalotra (University of Jammu)05/09/2023, 17:30
Strangeness production is considered a sensitive probe to the properties of the medium created in heavy-ion collisions. The RHIC Beam Energy Scan Program (BES) is designed to investigate the QCD phase diagram and search for a potential QCD critical point. The BES-program covers a wide energy range from $\sqrt{s_{\rm{NN}}}$ = 3 to 54.4 GeV. Of particular interest is the high baryon density...
Go to contribution page -
Nanxi Yao (University of Illinois, Urbana-Champaign)05/09/2023, 17:30
Neutron star equations of state that can sustain heavy neutron stars over 2 Msun necessitate a large, rapid rise in the speed of sound. The family of equations of states, which assume electric neutrality along beta equilibrium and vanishing temperatures, with large bumps in the speed of sound have been suggested to be incompatible with the equation of state extracted from heavy-ion...
Go to contribution page -
Dr Yuhei Morino (KEK)05/09/2023, 17:30
Heavy ion collisions at $\sqrt{s_{NN}}$ ~ several GeV seem to be the only method to generate ultra-high-density matter comparable to those inside neutron stars experimentally.
Go to contribution page
In such ultra-high-density matter, many phenomena are expected, such as the transition to the non-confined phase. Among those, a few things are well understood about high-density matter, both theoretically and... -
Su-Jeong Ji (Pusan National University (KR))05/09/2023, 17:30
$K_{1}$ and $K^{*}$ mesons are chiral partners whose vacuum widths are smaller than 100 MeV. This makes these mesons ideal to study possible effects of chiral symmetry restoration in heavy-ion collisions. In a recent theoretical study, the $K_{1}/K^{*}$ ratio in heavy-ion collisions is expected to be substantially larger than the statistical hadronisation model predictions. The study of the...
Go to contribution page -
Gijs Van Weelden (Nikhef National institute for subatomic physics (NL))05/09/2023, 17:30
Studies of gluon fragmentation at LEP have shown hints that gluon-initiated jets produce more baryons than quark-initiated jets. Our current knowledge of fragmentation functions is almost exclusively based on fits to data from $e^+ e^-$ collisions and semi-inclusive deep inelastic scattering processes, both of which are mainly sensitive to quark fragmentation, leaving gluon fragmentation...
Go to contribution page -
XIATONG WU (Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, USA)05/09/2023, 17:30
In nuclear collisions at low RHIC energies, although $s$ and $\bar{s}$ quarks are produced in pairs, there is a significant excess of $\Omega^{-}$ over ${\bar{\Omega}}^{+}$ which suggests that $\Omega^{-}$ carries a net baryon number. Such an excess of net baryon number at mid-rapidity in Au+Au collisions manifests effective mechanisms of baryon number transport over a large rapidity gap....
Go to contribution page -
Hyunji Lim (Pusan National University (KR))05/09/2023, 17:30
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 ratio of resonances to the...
Go to contribution page -
Peter Christiansen (Lund University (SE))05/09/2023, 17:30
Two-particle correlation functions give insight into the microscopic details of the production and transport mechanisms of conserved quantum numbers. In this contribution, new final measurements by the ALICE Collaboration of $\Xi-\pi$, $\Xi-$K, $\Xi-$p, $\Xi-\Lambda$, and $\Xi-\Xi$ correlation functions are presented to study how charge, strangeness, and baryon numbers are balanced in...
Go to contribution page -
Oton Vazquez Doce (INFN e Laboratori Nazionali di Frascati (IT))05/09/2023, 17:30
We present a new experimental method to study three-body nuclear systems by measuring correlations in the momentum space of deuteron-hadron pairs produced in proton-proton collisions at the LHC. The study of three- and many-body dynamics has been a long-standing goal in nuclear physics, particularly for understanding the structure of light nuclei and describing neutron-rich and dense nuclear...
Go to contribution page -
Ilya Fokin (Heidelberg University (DE))05/09/2023, 17:30
Fluctuations of conserved charges, such as baryon number, electric charge, and strangeness, are a unique tool for studying the phase diagram of strongly interacting matter. The cumulants of the distributions of the conserved charges in heavy-ion collisions can be related to the equation of state in lattice QCD (LQCD), making first-principles calculations accessible in the experiment. Recent...
Go to contribution page -
Andrea Giovanni Riffero (University and INFN Torino (IT))05/09/2023, 17:30
Angular correlations and polarization studies provide valuable insights into the vector meson production mechanism, including interference effects as well as information on the nuclear geometry of the target. In this talk, we present two new results. We will report the first measurement of the polarization of both coherent and incoherent J/psi photoproduction in ultra-peripheral Pb--Pb...
Go to contribution page -
Dr Iurii Karpenko (FNSPE CTU in Prague)05/09/2023, 17:30
We present a new model for jet quenching via coherent gluon radiation and elastic scatterings off medium partons. The jet energy loss is simulated as a perturbative final-state vacuum parton shower followed by a medium-induced shower originating from elastic and radiative collisions with the medium constituents. Coherency is achieved by starting with trial gluons that act as field dressing of...
Go to contribution page -
Dr Yang-Ting Chien (Georgia State University)05/09/2023, 17:30
The study of the suppression of the leading two hadrons within jets, by virtue of being robust against the underlying event background, provides an insight into the onset of quenching in the history of the evolution of relativistic heavy-ion collisions, which can help discriminate between different partonic energy loss mechanisms. The modification of their flavor correlations, on the other...
Go to contribution page -
Takashi Hachiya (Nara Women's University (JP))05/09/2023, 17:30
In studies of QGP, it has been observed that at high-energy heavy-ion (A$+$A) collisions, high-momentum particles with light and heavy flavors receive significant suppression. This indicates that particles lose their energies in QGP. One of the most important topics is to quantify the energy loss and to investigate the energy loss mechanism.
Go to contribution page
PHENIX measured the fractional momentum loss,... -
Marvin Kohls05/09/2023, 17:30
Investigating strangeness production and propagation in heavy-ion collisions in the few GeV energy regime is a sensitive tool for studying the microscopic structure of nuclear matter at high baryo-chemical potential.
Go to contribution page
In this contribution, we present preliminary results on the production of strange hadrons from a total of $3\times10^9$ most active Ag(1.58$A$ GeV)+Ag events recorded with HADES... -
Dr Yang-Ting Chien (Georgia State University)05/09/2023, 17:30
We discuss the reconstruction of target jet and the framework of quantifying its internal substructure. Due to momentum and charge conservation, target and current correlation can be exploited which significantly constrains the event-wide particle distributions. We demonstrate this method using Pythia simulations of electron-proton collisions in the context of determining the flavor and...
Go to contribution page -
Frederique Grassi05/09/2023, 17:30
Data obtained at RHIC can be reproduced with relativistic viscous hydrodynamic simulations by adjusting the viscosity and initial conditions but it is difficult to disentangle these quantities. It is therefore important to find orthogonal observables to constrain the initial conditions separately from the viscosity. New observables have been measured at the LHC and shown to be sensitive to...
Go to contribution page -
Dr Johannès Jahan (University of Houston - Department of Physics)05/09/2023, 17:30
In the exploration of the nuclear matter phase diagram, the susceptibilities of conserved charges are useful theoretical tools to probe the existence of a $1^\text{st}$ order phase transition, and a possible critical endpoint. They can be related to the cumulants of the considered net-charges, for which STAR collaboration recently published experimental measurements of proxies, in Au-Au...
Go to contribution page -
Jing-an Sun (Fudan University), Li Yan (Fudan University)05/09/2023, 17:30
In heavy ion collisions, the measured spectrum of direct photons at RHIC and the LHC has been found as azimuthally anisotropic as pions. In particular, a large elliptic flow of the direct photos has been observed, which strongly contradicts conventional theoretical predictions, leading to the well-known “direct photon puzzle”.
In this talk, instead of a strong magnetic field assumption...
Go to contribution page -
Thiago Siqueira Domingues (University of São Paulo)05/09/2023, 17:30
Despite the success of hydrodynamic models in describing heavy-ion collisions, there have long been questions about its regime of validity. Recently-derived conditions on the causality of the hydrodynamic equations [1] can give a concrete answer --- if evolution is acausal, it is not a faithful representation of the underlying QCD theory. It is now known that current simulation models reach...
Go to contribution page -
Mr Liqiang Zhu (Central China Normal University)05/09/2023, 17:30
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...
Go to contribution page -
Xing Wu05/09/2023, 17:30
The elliptic flow ($v_{2}$) is the second Fourier coefficient of azimuthal distributions of produced particles in heavy-ion collisions. Measurements of identified particle $v_{2}$ is one of the most informative ways in studying the properties of hot and dense nuclear matter created in heavy-ion collisions.
In this poster, elliptic flow of identified hadrons (${\pi}^{\pm}$, ${K}^{\pm}$, $p$...
Go to contribution page -
Guoping Wang05/09/2023, 17:30
The elliptic flow ($v_{2}$) is the second harmonic coefficient in a Fourier expansion of the azimuthal distribution of produced particles with respect to the reaction plane. Strange hadrons, especially the multi-strange hadrons, are regarded as good probes for the early stages of the collision, as they freeze-out earlier and have smaller hadronic cross sections than light hadrons. Thus, a...
Go to contribution page -
Abhijit Majumder (Wayne State University)05/09/2023, 17:30
Understanding the modification of jets and high-p_T probes in small systems requires the integration of soft and hard physics. We present recent developments in extending the JETSCAPE framework to build an event generator, which includes correlations between soft and hard partons, to study jet observables in small systems. The multi-scale physics of the collision is separated into different...
Go to contribution page -
Caio Brito (Universidade Federal Fluminense)05/09/2023, 17:30
The method of moments has been employed to derive relativistic fluid-dynamical theories from the Boltzmann equation for the past decades [1]. This approach consists in expanding the single-particle distribution function using a basis of irreducible momenta, where the expansion coefficients are the irreducible moments of the nonequilibrium distribution function [2]. Unlike the Chapman-Enskog...
Go to contribution page -
Oscar Garcia-Montero05/09/2023, 17:30
We present a new 3+1D resolved model for the initial state of ultrarelativistic Heavy-Ion collisions, based on the $k_\perp$ factorized Color Glass Condensate hybrid approach [1-4]. This new model responds to the need for a rapidity-resolved initial-state Monte Carlo event generator which can deposit the relevant conserved charges (energy, charge and baryon densities) both in the midrapidity...
Go to contribution page -
Zachary Akridge (Indiana University)05/09/2023, 17:30
The study of strongly interacting matter under external conditions (such as high temperatures and/or baryon densities) provides unique insights into its fundamental theory, Quantum Chromodynamics (QCD). A nonzero angular momentum imposed on a QCD system can bring rich and intriguing phenomena, with the proton spin structure being a perfect example. A much larger QCD system with substantial...
Go to contribution page -
Zi-Wei Lin (East Carolina University)05/09/2023, 17:30
The shear viscosity (eta) of a quark-gluon plasma in equilibrium can be calculated numerically using the Green-Kubo relation or analytically using several methods, including the Israel-Stewart, Navier-Stokes, relaxation time approximation, and Chapman-Enskog methods. In this work [1], we first examine these analytical methods for isotropic as well as anisotropic two-body scatterings. We...
Go to contribution page -
Adrian Rodriguez05/09/2023, 17:30
The Silicon Tracking System (STS) is the main tracking detector of the CBM experiment. It is designed to reconstruct trajectories of up to 700 charged particles per event produced in up to 10 MHz heavy-ion collision with high efficiency, to achieve momentum resolution better than 2% inside a 1 Tm magnetic field, and to be capable of identifying complex decay topologies. The main STS functional...
Go to contribution page -
Nicole Apadula (Lawrence Berkeley National Lab. (US))05/09/2023, 17:30
Experiments at the future Electron-Ion collider pose stringent requirements on the tracking system for the measurement of the scattered electron and charged particles produced in the collision, as well as the position of the collision point and any decay vertices of hadrons containing heavy quarks. Monolithic Active Pixel Sensors (MAPS) offer the possibility of high granularity in combination...
Go to contribution page -
Christopher Pinkenburg (BNL)05/09/2023, 17:30
The sPHENIX detector is the next generation experiment at the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory. Starting commissioning in May, it will collect high statistics data sets from ultra relativistic Au+Au, p+p and p+Au collisions in the next 3 years. The readout is a combination of triggered readout for calorimeters and streaming readout for the silicon...
Go to contribution page -
Dr Maya Shimomura (Nara Women's University (JP))05/09/2023, 17:30
When studying the properties of the Quark-Gluon Plasma (QGP) formed in relativistic heavy ion collisions, it is necessary to classify the events based on the size and shape of the QGP. Typically, events are categorized by mapping the impact parameter, which cannot be measured directly, to a bulk observable that varies monotonically with it, such as soft particle production. In the mapping,...
Go to contribution page -
Gergely Barnafoldi (Wigner RCP)05/09/2023, 17:30
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 -
Stephan Ochsenfeld (Bielefeld University)05/09/2023, 17:30
Universality is omnipresent when certain classes of microscopic theories are coarse-grained into effective macroscopic descriptions. Hydrodynamic theories are such macroscopic descriptions in long-wavelength, low-frequency limits of many quantum field theories. On the phenomenological side, hydrodynamics not only serves as a successful macroscopic description of the Quark-gluon plasma (QGP) in...
Go to contribution page -
Chenliang Jin05/09/2023, 17:30
Due to the minimal interactions with the hot and dense QCD matter created in relativistic heavy-ion collisions, thermal dileptons emitted throughout the medium evolution are suggested as an excellent probe to study the medium properties. In the dilepton invariant mass range from 400 to 800 MeV/$c^{2}$, the mass distribution is proportional to the in-medium $\rho$ propagator, which is sensitive...
Go to contribution page -
Jerome Jung (Goethe University Frankfurt (DE))05/09/2023, 17:30
Dielectrons are an exceptional tool to study the evolution of the medium created in heavy-ion collisions. In central collisions, the energy densities are sufficient to create a quark-gluon plasma (QGP). Thermal e$^{+}$e$^{-}$ pairs with invariant masses around 1.5 GeV/$c^{2}$ can be used to estimate the early average temperature of the QGP.
At LHC energies, the cross section of...
Go to contribution page -
David Frenklakh (Stony Brook University)05/09/2023, 17:30
The question of identifying the baryon topological structure encoded in the baryon junctions has a long history and was recently addressed in the measurements of baryon stopping by the STAR collaboration. We suggest considering this question in a simple, exactly solvable model that allows us to clearly separate the topological junction structure from the valence quarks. We find that baryon...
Go to contribution page -
Joe Osborn (Brookhaven National Laboratory)05/09/2023, 17:30
The sPHENIX detector at Brookhaven National Laboratory's Relativistic Heavy Ion Collider (RHIC) has a broad experimental QCD physics program focused on jets, their substructure, and open and closed heavy flavor production. To measure these observables, the sPHENIX tracking system is composed of a silicon vertex and strip detector, continuous-readout time projection chamber, and...
Go to contribution page -
Michael Joseph Peters (Massachusetts Inst. of Technology (US))05/09/2023, 17:30
The tracking reconstruction procedure for the sPHENIX experiment combines data from its silicon pixel detector, silicon strip detector, time projection chamber, and micromegas-based outer tracker modules to produce tracks that trace a given particle's path through 57 total sensor layers. After clustering of the raw data is completed, the track seeding modules identify chains of clusters that...
Go to contribution page -
Kevin Pala05/09/2023, 17:30
In 2018, RHIC conducted isobar collisions of $^{96}_{44}$Ru and $^{96}_{40}$Zr nuclei in search for the chiral magnetic effect. As a byproduct, anisotropic flow data were taken, revealing differences between the two systems associated to the nuclear structure of the colliding nuclei. This observation offers an opportunity to bridge low-energy nuclear physics and high-energy collisions. Many...
Go to contribution page -
Juhee Hong (Yonsei University)05/09/2023, 17:30
We discuss the transport coefficients of heavy quarkonia moving in high temperature QCD plasmas. The thermal width and mass shift for quarkonia are closely related to the momentum diffusion coefficient and its dispersive counterpart for heavy quarks, respectively. For quarkonium at rest in plasmas, the longitudinal gluon part of the color-singlet self-energy diagram is sufficient to determine the...
Go to contribution page -
Moises David Leon Coello (Universidad de Sonora (MX))05/09/2023, 17:30
We present a new study of two-particle correlations as extracted with the CMS experiment in 8.16 TeV proton-lead (pPb) events with large rapidity gaps in the proton going region. Recent comparisons of the cross sections of such events measured in CMS as a function of the rapidity gaps (i.e., regions devoid of any particle activity) with several generators suggest that such events have...
Go to contribution page -
Koichi Murase (Yukawa Institute for Theoretical Physics, Kyoto University)05/09/2023, 17:30
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) [1,2], is one of the observables suggested for a possible signal of the...
Go to contribution page -
Soyeon Cho (Inha University (KR))05/09/2023, 17:30
The Ridge behavior in high-multiplicity proton-proton collisions has been discussed a lot since it was first reported. However, small systems like proton-proton collisions are not enough to generate a medium called Quark-Gluon Plasma (QGP) in which the Ridge behavior is explained with high-order flows. In this work, we suggest the pure kinematic mechanism between jets and medium partons as...
Go to contribution page -
Alexandre Falcão (University of Bergen)05/09/2023, 17:30
Experimental data on a wide range of jet observables measured in heavy ion collisions provide a rich picture of the modification of jets as perturbative probes and of the properties of the quark-gluon plasma. However, their interpretation is often limited by the assumptions of specific quenching models, and it remains a challenge to establish model-independent statements about the universality...
Go to contribution page -
Abraham Holtermann (University of Illinois at Urbana Champaign)05/09/2023, 17:30
Rare probes such as jets and heavy flavor hadrons provide unique opportunities to study the short-distance scale properties of the QGP created in heavy ion collisions. For example, recent measurements at the LHC and RHIC indicate that jet energy loss is correlated with the distance traveled through the QGP medium, and as a result, the initial geometry of the QGP. While estimates of...
Go to contribution page -
Anthony Frawley05/09/2023, 17:30
The open heavy flavor program of the sPHENIX experiment at RHIC requires precise determination of the location of individual tracks in the region around the interaction vertex. Three layers of MAPS based pixels (the MVTX) surrounding the beam line are designed to provide a precision of about 10 ìm for higher momentum tracks. The tracking system also contains two layers of silicon strip...
Go to contribution page -
Bhawani Singh (Technische Universitaet Muenchen (DE))06/09/2023, 08:30
The ALICE Collaboration presents a new experimental approach to explore the interactions in three-hadron systems by analyzing femtoscopic correlation functions of deuteron-hadron pairs produced in high-multiplicity pp collisions at $\sqrt{s}$ = 13 TeV and in Pb--Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ $\mathrm{TeV}$ at the LHC. The measured p-d correlation function can only be explained if...
Go to contribution page -
Xiaoyu Liu06/09/2023, 08:30
In heavy-ion collisions, the measurements of anisotropic flow coefficient ($v_n$) offer insights into collective hydrodynamic expansion and transport properties of the produced medium at higher collision energies, while they are sensitive to the compressibility of the nuclear matter and nuclear equation of state at lower collision energies. The second phase of the Beam Energy Scan program...
Go to contribution page -
Dhanush Anil Hangal (Lawrence Livermore Nat. Laboratory (US))06/09/2023, 08:30
Measuring the jet substructure in heavy-ion collisions provides exciting new opportunities to study detailed aspects of the dynamics of jet quenching in the hot and dense QCD medium created in these collisions. In this talk, we present new comprehensive ATLAS measurements of jet suppression and substructure performed using various jet radii and grooming techniques. New measurements of...
Go to contribution page -
Dr Wilke Van Der Schee (CERN)06/09/2023, 08:30
In vacuum, the spacetime location where a gluon splits into a quark-antiquark pair is not a well defined observable. In heavy-ion collisions, the `formation time’ of a splitting takes on meaning due to interactions with the medium and is a critical feature for the phenomenology of medium-modified parton showers. The $g\rightarrow c\bar{c}$ splitting is especially suited to study this formation...
Go to contribution page -
Jiazhao Lin (Rice University (US))06/09/2023, 08:30
Gluons are found to become increasingly dominant constituents of nuclear matter when being probed at higher energies or smaller Bjorken-$x$ values. This has led to the question of the ultimate fate of nuclear gluonic structure at extreme density. In ultraperipheral collisions (UPCs) of relativistic heavy ions, the coherent heavy-flavor vector meson production via photon-nuclear interactions is...
Go to contribution page -
Ulrich Heinz06/09/2023, 08:50
Due to large pressure gradients at early times, standard hydrodynamic model simulations of relativistic heavy-ion collisions do not become reliable until $O(1)$ fm/$c$ after the collision. To address this one often introduces a pre-hydrodynamic stage that models the early evolution microscopically, typically as a conformal, weakly interacting gas. In such an approach the transition from the...
Go to contribution page -
Ashik Ikbal Sheikh06/09/2023, 08:50
In ultra-peripheral collisions (UPCs), exclusive vector meson photoproduction, e.g., $\rho^{0}$ and $J/\psi$, has been considered one of the most sensitive probes to the gluon structure in heavy nuclei. Recently, it was discovered that the linear polarization of the photons involved in these processes can enable measurements of the nuclear geometry through the so-called entanglement-enabled...
Go to contribution page -
Wenqing Fan (Lawrence Berkeley National Lab. (US))06/09/2023, 08:50
Many new jet substructure observables have been studied in recent years, with particular attention to those which can be calculated by perturbative QCD. N-point energy correlators are currently attracting both theoretical and experimental interest. To comprehensively study the perturbative and non-perturbative aspects of jet structure, we measured the energy-energy correlators (EEC) that...
Go to contribution page -
Ivan Vorobyev (CERN)06/09/2023, 08:50
The investigation of the production mechanism of light (anti)(hyper)nuclei in ultrarelativistic hadronic collisions is one of the main topics in modern nuclear physics. The ALICE Collaboration has significantly contributed to this specific field of research with systematic measurements of the production of (anti)(hyper)nuclei in different collision systems and centre-of-mass energies provided...
Go to contribution page -
Christopher Mc Ginn (Massachusetts Inst. of Technology (US))06/09/2023, 08:50
Partons traversing the hot and dense medium of deconfined color charges produced in collisions of heavy nuclei are expected to lose their energy primarily through medium-induced gluon bremsstrahlung. As a result, the amount of induced energy loss is expected to depend on the QCD color charge carried by the parton, i.e. depend on whether it is a quark- or a gluon-initiated jet. In this talk,...
Go to contribution page -
Simone Ragoni (Creighton University (US))06/09/2023, 09:10
ALICE has been the first experimental collaboration observing a moderate nuclear suppression down to low Bjorken x in lead nuclei using coherent J/$\psi$ photoproduction. In this talk, we present new results extending the studies of the photonuclear cross section by covering the Bjorken-x interval of $1.1 \cdot 10^{-5} < x < 3.3 \cdot 10^{-2}$, corresponding to the photon-nuclear energies $17...
Go to contribution page -
Cole Faraday06/09/2023, 09:10
We present first results for light and heavy flavor high-$p_T$ hadron suppression from a short path length corrected energy loss model in $p+p$, $p+A$, and $A+A$ collisions at RHIC and the LHC. We find that the short path length corrections to final state radiative energy loss for light flavor hadrons predict nontrivial enhancement such that high multiplicity $R_{pA} > 1$, consistent with...
Go to contribution page -
Chengdong Han06/09/2023, 09:10
Studying the production and collectivity of light and hyper-nuclei in high-energy nuclear collisions in the high baryon density region can help us understand how they form and how hyperons interact with nucleons under finite pressure.
In this talk, we will present the first results on the energy dependence of directed flow $v_1$ of light and hyper-nuclei (p, d, $^3$He, and $\Lambda$,...
Go to contribution page -
Megan Connors (Georgia State University)06/09/2023, 09:10
Since the discovery of the jet quenching at RHIC, the in-medium interaction of hard scattered partons with the nuclear medium created by high-energy heavy-ion collisions has been an excellent tool to understand not only the transport properties of the medium but also its time evolution towards hadronization. The multi-differential measurement of the high momentum two-particle correlations can...
Go to contribution page -
Joerg Aichelin (SUBATECH)06/09/2023, 09:10
Quarkonia are a very interesting probe for the study of thequark gluon plasma (QGP), created in ultrarelativisitc heavy-ion collisions. They can elucidate several features of the QGP, which are not accessible to other probes. These include the energy loss of color neutral states and open heavy flavour partons in the QGP, the possible recombination of heavy quarks during the expansion of the...
Go to contribution page -
Elena Bratkovskaya (GSI, Darmstadt)06/09/2023, 09:30
Authors: G. Coci, S. Glässel, V. Kireyeu, J. Aichelin, C. Blume, V. Kolesnikov, V. Voronyuk and E. Bratkovskaya
The formation of weakly bound clusters and hypernuclei in the hot and dense environment at midrapidity is one of the surprising phenomena observed experimentally in heavy-ion collisions from low SIS to ultra-relativistic LHC energies. This is also known as the `ice in a fire'...
Go to contribution page -
Guang-You Qin (Central China Normal University)06/09/2023, 09:30
We present a unique signal of jet-induced medium excitations: the enhancement of baryon-to-meson ratios around the quenched jets [1]. To illustrate this, we study jet-particle correlations and the distributions of jet-induced identified particles with respect to the jet direction in Pb+Pb collisions at the LHC via a multi-phase transport model. We find a strong enhancement of baryon-to-meson...
Go to contribution page -
Vincenzo Minissale06/09/2023, 09:30
In the past years, a Quasi-Particle Model (QPM) has been developed to study charm quark dynamics in ultra-relativistic heavy-ion collisions supplying a satisfactory description of both the $R_{AA}(p_T)$ and $v_2(p_T)$ of D mesons and leading to a first evaluation of the spatial diffusion coefficient $D_s(T)$ from the phenomenology [1,2]. Within an event-by-event full Boltzmann transport...
Go to contribution page -
Sruthy Jyothi Das (University of Colorado Boulder (US))06/09/2023, 09:30
Ultraperipheral collisions of relativistic heavy ion beams lead to a diverse set of photon-nucleus (photonuclear) interactions. The measurements of particle production in photonuclear reactions can shed light on the QCD dynamics of the novel, extremely asymmetric colliding systems, with energies between those available at RHIC and the LHC. Previous studies by ATLAS indicate significant...
Go to contribution page -
Boris Tomasik (Univerzita Mateja Bela (SK))06/09/2023, 09:30
We present a novel multi-fluid approach to simulate heavy-ion collisions in the region of RHIC Beam Energy Scan and FAIR experiments. This region of collision energies from few to few tens of GeV is particularly interesting for the exploration of dense baryon matter and search of the critical point of QCD. However, fluid-dynamical modelling here poses notable challenges. Contraction of the...
Go to contribution page -
Andrea Beraudo (INFN, sezione di Torino (IT))06/09/2023, 09:50
Recent experimental results on the Λ+c/D0 ratio in proton-proton collisions – strongly enhanced compared to expectations relying on universal fragmentation fractions/functions in different colliding system, from e+e− to pp – led to speculations about possible medium effects affecting hadronization, previously considered a distinctive feature only of heavy-ion collisions. Here we show how the...
Go to contribution page -
Wojciech Brylinski (Warsaw University of Technology (PL))06/09/2023, 09:50
The recent measurements of NA61/SHINE at the CERN SPS revealed a large violation of isospin symmetry. The ratio of charged to neutral kaons was measured to be 1.22 ± 0.06 in Ar+Sc collisions at 75A GeV/c. This contribution will present the experimental details of this intriguing result. It will also compare it to the world data on charged to neutral kaons ratio in nucleus-nucleus collisions....
Go to contribution page -
Xiang-Yu Wu (Central China Normal University)06/09/2023, 09:50
We perform a systematic study on the local and global spin polarization of $\Lambda$ and $\overline{\Lambda}$ hyperons in relativistic heavy-ion collisions at beam energy scan energies via the (3+1)-dimensional CLVisc hydrodynamics model with AMPT and SMASH initial conditions. Following the quantum kinetic theory, we decompose the polarization vector as the parts induced by thermal vorticity,...
Go to contribution page -
Xiaolin Wang (South China Normal University (CN))06/09/2023, 09:50
Measurements of quarkonia production in peripheral and ultra-peripheral
Go to contribution page
heavy-ion collisions are sensitive to photon-photon and photon-nucleus interac-
tions, 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... -
Jaime Norman (University of Liverpool (GB))06/09/2023, 09:50
The measurement of jets recoiling from a trigger hadron (hadron+jet) provides unique probes of medium-induced modification of jet production. Jet deflection via multiple soft scatterings with the medium constituents may broaden the azimuthal correlation between the trigger hadron and the recoiling jet. In addition, the tail of this azimuthal correlation may be sensitive to single-hard Moli`ere...
Go to contribution page -
Marten Becker06/09/2023, 10:10
In this contribution we will discuss the production of $\Sigma^0$ baryons in Ag+Ag collisions at 1.58 AGeV beam energy measured by HADES. Although, the High Acceptance DiElectron Spectrometer (HADES) at GSI was primarily designed to measure Di-Electrons, it also features a very rich program measuring hadronic probes in the region of moderate temperature and high-baryon density in the QCD phase...
Go to contribution page -
Federica Capellino06/09/2023, 10:10
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 anisotropic flow of charmed hadrons pose the question regarding the possible thermalization of heavy quarks in the medium. Our recent...
Go to contribution page -
Dr Cindy Mordasini (University of Jyvaskyla (FI))06/09/2023, 10:10
Characterization of the quark--gluon plasma (QGP) created in ultrarelativistic heavy-ion collisions requires identifying observables sensitive to the different phases of the collision. Previous studies have shown that measurements of the azimuthal anisotropic flow and the complex interplay between its harmonics can provide valuable information on the QGP transport properties.
In this talk,...
Go to contribution page -
Petja Paakkinen06/09/2023, 10:10
In this talk, we present new NLO pQCD predictions for photoproduction of dijets in UPC PbPb collisions at 5.02 TeV with realistic photon flux and up-to-date nuclear parton distribution functions (nPDFs). We calculate nuclear form factor for the impact parameter-dependent flux using Woods-Saxon density profile and compare the result to a widely-used point-like approximation. We show that a...
Go to contribution page -
Carlota Andres (Ecole Polytechnique, CPHT)06/09/2023, 10:10
We present a novel approach to jet substructure in heavy-ion collisions formulated in terms of correlation functions of flux operators (energy correlators). This approach is based on the insight that the time scales in the jet’s evolution are imprinted into the angular scales of the correlator spectra. We study the two-point correlator of an in-medium massless quark jet, showing its...
Go to contribution page -
Débora Mroczek (University of Illinois at Urbana-Champaign)06/09/2023, 11:00
Functional forms of the neutron star Equation of State (EoS) are required to extract the viable EoS band from neutron star observations. Realistic nuclear EoSs, containing deconfined quarks or hyperons, present nontrivial features in the speed of sound such as bumps, kinks, and plateaus. Using modified Gaussian processes to model EoSs with nontrivial features, we show in a fully Bayesian...
Go to contribution page -
Ting Lin06/09/2023, 11:00
Understanding the internal spin structure of the nucleon remains a challenge in strong interaction physics. The unique capability of RHIC to provide both longitudinally and transversely polarized hadronic collisions at various energies opened new avenues in studying the internal structure of the proton with unprecedented depth and precision. Significant progress has been made in the last few...
Go to contribution page -
Zhenyu Ye (University of Illinois at Chicago (US))06/09/2023, 11:00
The intriguing phenomena emerging in the high-density quantum chromodynamics (QCD) matter are being widely studied in the heavy ion program at the LHC and will be understood more deeply during the high-luminosity LHC (HL-LHC) era. The CMS experiment is under the Phase II upgrade towards the HL-LHC era. A new timing detector is proposed with its timing resolution for minimum ionization...
Go to contribution page -
Alek Hutson (University of Houston (US))06/09/2023, 11:00
One of the main goals in the study of hadronic interactions at LHC energies is the attempt to characterize the mechanisms involved in particle production in different regimes. The charged-particle multiplicity is one of the most interesting observables in these kind of studies. On the one hand, the pseudorapidity dependence of charged-particle production provides information on the partonic...
Go to contribution page -
Dr Aleksas Mazeliauskas (Heidelberg University (DE))06/09/2023, 11:00
We study the equilibration of a high-momentum parton traveling through a Quark-Gluon Plasma using QCD kinetic theory. We show that the energy and particle number are first transported to the soft sector by collinear cascade and then isotropized by elastic scatterings. For a static thermal background, we find that the jet wake can be described by a thermal distribution function with...
Go to contribution page -
Yumu Yang06/09/2023, 11:20
In binary neutron-star mergers, violent changes in density drive the proton fraction out of equilibrium at timescales of milliseconds, comparable to those required by weak interactions to restore beta equilibrium. As a result, the pressure evolves out of phase with the density oscillations, giving rise to dissipative work that can be modeled as an effective bulk-viscous correction [1,2]. Near...
Go to contribution page -
Yuan-Yuan Zhang (CUHK-SZ)06/09/2023, 11:20
Parton saturation is one of the most intriguing phenomena in the high energy nuclear physics research frontier, especially in the upcoming era of the Electron-Ion Collider (EIC). The lepton-jet correlation in deep inelastic scattering provides us with a new gateway to the parton saturation at the EIC. In particular, we demonstrate that azimuthal angle anisotropies of the lepton-jet correlation...
Go to contribution page -
Austin Schmier (University of Tennessee (US))06/09/2023, 11:20
The study of jet production in small collision systems is essential for testing our understanding of perturbative and non perturbative QCD and cold nuclear matter effects. In addition, studies at high multiplicity in small collision systems exhibit signatures of collectivity, which is still not fully understood within a unified picture across system size. Jet quenching in small systems is not...
Go to contribution page -
Isabella Sanna (Technische Universitat Munchen (DE))06/09/2023, 11:20
The ALICE experiment is preparing for the ITS3 upgrade, which is set to take place during the LHC Long Shutdown 3. The aim of this upgrade is to replace the three innermost tracking layers with truly cylindrical wafer-scale Monolithic Active Pixel Sensors (MAPS). By adopting this innovative technology, ALICE will further reduce the material budget and the distance from the interaction point,...
Go to contribution page -
Jussi Viinikainen (Vanderbilt University (US))06/09/2023, 11:20
Even though the quark-gluon plasma produced in high-energy heavy ion collisions has been studied in detail for years, there are still properties that are not known to a good precision. One example of such property is the medium resolution length, which is related to the smallest angle of emission where the medium can still resolve the daughter particles as individual particles. This can be...
Go to contribution page -
Florian Jonas (Westfaelische Wilhelms-Universitaet Muenster (DE))06/09/2023, 11:40
The FoCal is a high-granularity forward calorimeter to be installed as an ALICE upgrade subsystem during the LHC Long Shutdown 3 and take data during the LHC Run 4.
Go to contribution page
It will cover a pseudorapidity interval of $3.4 < \eta < 5.8$, 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.
It... -
Tuomas Lappi06/09/2023, 11:40
We explore consequences of the existence of gluonic hot spots inside the proton for the initial eccentricities in a proton-nucleus collision [1], and the constraints on the parameters describing these hot spots from coherent and incoherent exclusive vector meson production cross sections in deep inelastic scattering [2].
The eccentricities are calculated by calculating correlation functions...
Go to contribution page -
Xiaoxuan Chu06/09/2023, 11:40
The gluon distribution function exhibits a rapid increase when the momentum fraction $x$ decreases. However, the total scattering cross section cannot grow beyond a certain limit due to unitarity constraints, which requires the increase of gluon density to be tamped. Gluon recombination under the color glass condensate (CGC) framework provides a possible solution. Therefore, discoveries of...
Go to contribution page -
Chihiro Sasaki06/09/2023, 11:40
In this talk, I discuss the statistically determined equation of state of dense matter that fulfills the multimessenger constraints and determine the properties of dense matter found in neutron stars. I demonstrate that the speed of sound and trace anomaly are driven towards their conformal values at the center of maximally massive NSs. I argue that the local peak of the speed of sound is...
Go to contribution page -
Dr Yacine Mehtar-Tani (Brookhaven National Laboratory)06/09/2023, 11:40
Jets provide a powerful tool to study the properties of hot nuclear matter and its effect on quantum processes. The degree of modification of jets by the medium depends on how well the medium can resolve the internal jet structure. In this work, we investigate the interplay between the multi-partonic structure of jets and their interaction with a strongly-interacting medium. Specifically, we...
Go to contribution page -
Dhevan Raja Gangadharan (University of Houston (US))06/09/2023, 12:00
Luminosity is an essential quantity to measure the cross section of any process. At the Electron Ion Collider (EIC), it will be measured using the Bethe-Heitler process in which a real photon is radiated in the electron-ion (p or A) scattering: e + p(A) → e + p(A) + Ɣ. The cross section is very large with respect to DIS and can be precisely calculated in leading-order QED, as was done by...
Go to contribution page -
Alexander Clevinger06/09/2023, 12:00
In this contribution, we describe new chemically-equilibrated charge neutral hybrid equations of state for neutron stars. They present a phase transition to deconfined quark matter and are differentiated by the particle population considered and how these particles interact. While some equations of state contain just nucleons and up, down-quarks, others also contain hyperons, Delta baryons,...
Go to contribution page -
Tanmay Pani06/09/2023, 12:00
Jets are produced in early stages of heavy-ion collisions and undergo modified showering in the quark-gluon plasma (QGP) medium relative to a vacuum case. These modifications can be measured using observables like jet momentum profile and generalized angularities to study the details of jet-medium interactions. Jet momentum profile ($\rho(r)$) encodes radially differential information about...
Go to contribution page -
Parker Gardner (Rice University (US))06/09/2023, 12:00
It has been postulated that nonperturbative quantum chromodynamics (QCD) evolution of a single parton in the vacuum can develop long-range collective effects of a multiparton system, reminiscent of those observed in high-energy nuclear interactions from the formation of a quark-gluon plasma. A search for such QCD collective effects is performed by the CMS experiment via correlation...
Go to contribution page -
Claudia Hoehne06/09/2023, 12:00
The Compressed Baryonic Matter (CBM) experiment is under construction 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 fixed-target experiment, CBM is equipped with fast and...
Go to contribution page -
Ms Khwahish Kushwah (Universidade Federal Fluminense (UFF), Rio de Janeiro, Brazil)06/09/2023, 12:20
We derive the equations of motion of relativistic magnetohydrodynamics from the Boltzmann equation using the method of moments. We generalize the references [1, 2] and consider a fluid to be a locally neutral system composed of a particle with opposite charges, with vanishing dipole moment or spin, so that the fluid has vanishing magnetization and polarization.
We demonstrate that the...
Go to contribution page -
Saverio Mariani (CERN)06/09/2023, 12:20
Within the recent LHCb upgrade program, notably including the replace-
Go to contribution page
ment of the whole tracking system and the removal of the hardware trigger
level, the gaseous target SMOG has been improved by the installation of a gas
storage cell upstream of the nominal LHCb interaction point. This is allowing
to increase the injected gas pressure by up to two orders of magnitude for the
same gas... -
Xuan Li (Los Alamos National Laboratory)06/09/2023, 12:20
The proposed Electron-Ion Collider (EIC) will utilize high-luminosity high-energy electron+proton ($e+p$) and electron+nucleus ($e+A$) collisions to solve several fundamental questions including searching for gluon saturation and studying the proton/nuclear structure. Due to their high masses ($M_{c,b} > \Lambda_{QCD}$), heavy quarks do not transfer into other quarks or gluons once they are...
Go to contribution page -
Dr Ivan Vitev06/09/2023, 12:20
Heavy meson production in reactions with nuclei is an active new frontier to understand QCD dynamics and the process of hadronization in nuclear matter. Measurements in various colliding systems at RHIC and LHC, including Pb-Pb, Xe-Xe, O-O, p-Pb, and p-O, enable precision tests of the medium-size, temperature, and mass dependencies of the in-medium parton propagation and shower formation. We...
Go to contribution page -
Zhong Yang (CCNU)06/09/2023, 12:20
Diffusion wake accompanying jet-induced Mach-cone is a unique feature of jet-medium interaction in high-energy heavy-ion collisions. We explore the 3D structure of the diffusion wake induced by triggered jets in Pb+Pb collisions at the LHC energy within the coupled linear Boltzmann transport and hydro model. We identify a valley structure caused by the diffusion wake on top of a ridge from the...
Go to contribution page -
Korinna Zapp (Lund University)06/09/2023, 12:40
The observation of signs of collectivity in small systems has highlighted the need
Go to contribution page
for a better understanding of equilibration in small and large collisions systems.
In search of this, the QCD effective kinetic theory formulated by Arnold, Moore
and Yaffe (AMY) [1] has emerged as a promising candidate. In order to fully exploit
the theory also for phenomenology we introduce ALPACA [2], a... -
Chiara Pinto (Technische Universitaet Muenchen (DE))06/09/2023, 12:40
Antinuclei can be produced in space either by collisions of high-energy cosmic rays with the interstellar medium or from the annihilation of dark matter particles stemming into standard model particles. High-energy hadronic collisions at accelerators create a suitable environment for producing light (anti)nuclei. Hence, studying the production of antinuclei in pp collisions at the LHC can...
Go to contribution page -
Adam Takacs (University of Bergen)06/09/2023, 12:40
We propose a novel approach to investigate the evolution of jets in heavy-ion collisions by employing a combination of jet substructure measurements. Our method focuses on isolating the perturbative regime of jet evolution. As a proof of concept, we analyze the distribution of the hardest splitting above a transverse momentum scale, $k_{t,cut}$, in high-$p_t$ jets. For a $k_{t, cut}$ that is...
Go to contribution page -
Giacomo Alocco (Universita e INFN, Cagliari (IT))06/09/2023, 12:40
NA60+ is a new proposed experiment designed to study the phase diagram of the strongly interacting matter at high baryochemical potential from 200 to 550 MeV at the CERN SPS. It is focused on precision studies of thermal dimuons, heavy quark and strangeness production in Pb--Pb collisions at center of mass energies ranging from 6 to 17 GeV.
The proposed experimental apparatus is composed of...
Go to contribution page -
Zhen Wang06/09/2023, 12:40
An upgrade to the STAR detector system at forward rapidities has been completed before RHIC RUN 2022 and used for data collection. It consists of the Forward Tracking System (FTS) and the Forward Calorimeter System (FCS). The Forward Tracking System is composed of a Silicon Tracker and a small-strip Thin Gap Chamber Tracker. The Forward Calorimeter System contains an Electromagnetic...
Go to contribution page -
Govert Nijs (Massachusetts Institute of Technology)06/09/2023, 14:20
In heavy nuclei the neutron distribution has a larger spatial extent than the proton distribution. This size difference represents the so-called neutron skin and is determined by the strong nuclear force in the same regime as that determining the masses and radii of neutron stars. The neutron skin of $^{208}$Pb, owing to its simple structure and large neutron excess, has been the target of...
Go to contribution page -
Andrea Palermo06/09/2023, 14:20
The polarization of the $\Lambda$ particle offers the unique opportunity to study the hydrodynamic gradients in the Quark-Gluon Plasma formed in heavy-ion collisions. However, the theoretical formula commonly used to calculate polarization is only a linear order expansion in thermal vorticity and neglects higher-order terms. Here, we present an exact calculation at all orders in (constant)...
Go to contribution page -
Azumi Sakai06/09/2023, 14:20
In-medium modifications of vector spectral functions are anticipated to carry imprints of restoration of chiral symmetry at high temperature/baryon density. Strong modifications have been indeed measured via dimuon production at the CERN SPS, whereas it remains inconclusive how to quantify those changes as the direct consequence of chiral symmetry restoration. Given the difficulty that it is...
Go to contribution page -
Ruben Kara06/09/2023, 14:20
The effect of a finite volume presents itself both in heavy ion
Go to contribution page
experiments as well as in recent model calculations. The magnitude is
sensitive to the proximity of a nearby critical point.
We calculate the finite volume effects at finite temperature in continuum
QCD using lattice simulations. We focus on the vicinity of the chiral
crossover.
We investigate the impact of finite volumes on... -
Prof. Adam Bzdak (AGH University of Science and Technology)06/09/2023, 14:20
In relativistic heavy-ion collisions, the longitudinal fluctuations of the fireball density caused, e.g., by baryon stopping fluctuations result in event-by-event modifications of the proton rapidity density distribution. I will present the multiparticle rapidity correlation functions due to the varying distribution width of the proton rapidity density in central Au+Au collisions at low...
Go to contribution page -
Michał Marczenko (University of Wrocław)06/09/2023, 14:40
In this talk I discuss the fluctuations of the net-baryon number density in dense hadronic matter. Chiral dynamics is modeled via the parity doublet Lagrangian, and the mean-field approximation is employed to account for chiral criticality. I explain the qualitative properties and systematics of the second-order susceptibility of the net-baryon number density for individual positive- and...
Go to contribution page -
Philip Plaschke (Bielefeld University)06/09/2023, 14:40
We use QCD kinetic theory to compute photon and dilepton production in the chemically equilibrating out-of-equilibrium Quark-Gluon Plasma created in the early stages of high-energy heavy-ion collisions. We compare the non-equilibrium rates to the production in a thermal QGP and extract the dependence of pre-equilibrium photon and dilepton production on the kinetic and chemical equilibration...
Go to contribution page -
David Clarke06/09/2023, 14:40
Using an eighth-order Taylor expansion in baryon chemical potential, we recently obtained the (2+1)-flavor QCD equation of state (EoS) at non-zero conserved charge chemical potentials from the lattice. We focused on strangeness-neutral, isospin-symmetric QCD matter, which closely resembles the situation encountered in heavy-ion collision experiments. Using this EoS, we present here results on...
Go to contribution page -
Chun Yuen Tsang (Kent State University)06/09/2023, 14:40
Baryon number is a strictly conserved quantity in QCD and is conventionally assumed to be divided equally among the three valence quarks in baryonic matter. An alternative model is the baryon junction: a Y-shaped configuration of nonperturbative gluons that is connected to all three valence quarks and carries the baryon number. Neither of these theories has been experimentally verified. ...
Go to contribution page -
Lillian de Bruin06/09/2023, 14:40
We modify the hydrodynamic equations of a relativistic chiral plasma to account for dissipative effects due to QCD sphaleron transitions. By analyzing the linearized hydrodynamic equations, we show that sphaleron transitions lead to nontrivial effects on vector and axial charge transport phenomena in the presence of a magnetic field. Notably, dissipative effects of sphaleron transitions lead...
Go to contribution page -
Dr KaiJia Sun (Institute of Modern Physics, Fudan University, Shanghai, China)06/09/2023, 15:00
Using a relativistic transport model to describe the evolution of the quantum chromodynamic matter produced in Au+Au collisions at $\sqrt{s_{NN}}=3-200$ GeV, we study the effect of a first-order phase transition in the equation of state of this matter on the yield ratio $N_tN_p/ N_d^2$ ($tp/d^2$) of produced proton ($p$), deuteron ($d$), and triton ($t$). We find that the large density...
Go to contribution page -
Toru Nishimura06/09/2023, 15:00
We calculate how the critical fluctuations of the QCD critical point (CP) and the color superconducting (CSC) phase transition affect the dilepton production rate (DPR) and the associated transport coefficients, the electric conductivity and relaxation time. We examine the modification of the photon self-energy by the so-called Aslamazov-Larkin, Maki-Thompson, and Density of States terms on...
Go to contribution page -
Dr Iurii Karpenko (FNSPE CTU in Prague)06/09/2023, 15:00
We present a study of flow and hyperon polarization observables at RHIC BES energies in a MUlti Fluid simulation for Fast IoN collisions (MUFFIN) model. MUFFIN is based on a multi-fluid approach to relativistic heavy-ion collisions, and treats the initial stage of heavy-ion reaction as mutual inter-penetration of baryon-rich fluids. It is implemented from scratch with the use of a versatile...
Go to contribution page -
Dekrayat Almaalol (University of Illinois Urbana-Champaign)06/09/2023, 15:00
At LHC energies it is possible to generate BSQ (baryon, strangeness, and electric) charge density fluctuations from gluon splittings into quark anti-quark pairs, generated within the ICCING model. This creates an opportunity to implement and quantify the BSQ charge dynamics in the very well controlled regime of heavy ion collisions simulations. In this work, we implement BSQ charge dynamics in...
Go to contribution page -
Benjamin Jacob Gilbert (Columbia University (US))06/09/2023, 15:00
In relativistic heavy ion collisions, the charged ions produce an intense flux of equivalent photons. Thus, photon-induced processes are the dominant interaction mechanism when the colliding nuclei have a transverse separation 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 -
Jishnu Goswami (Bielefeld University)06/09/2023, 15:20
Our ability to predict thermodynamic observables and determine the QCD critical point at real values of chemical potentials is severely limited by the infamous sign problem. To address this issue, there are two common approaches: expanding the QCD partition function in a Taylor series with respect to the charge chemical potentials ($\mu_{B,Q,S}$) or analytically continuing from imaginary...
Go to contribution page -
Diyu Shen06/09/2023, 15:20
In high-energy heavy-ion collisions, the chiral magnetic effect (CME) is predicted to arise from the interplay between the chirality imbalance of quarks in the nuclear medium and the intense magnetic field, and will cause a charge separation along the magnetic field direction. While the search for the CME is still ongoing in experiments at Relativistic Heavy Ion Collider (RHIC) and the Large...
Go to contribution page -
Fabian Rennecke06/09/2023, 15:20
The QCD phase diagram at large chemical potential is largely uncharted territory. Based on model studies, there are various phases that could occur in this regime. Among them are phases related to spatial modulations, such as inhomogeneous/crystalline phases, liquid crystals or a quantum pion liquid. A common feature of all these phases is that particles can have a moat dispersion, where the...
Go to contribution page -
Jean-Francois Paquet (Vanderbilt University)06/09/2023, 15:20
Thermal photon emission from the QGP is visible in the $p_T$ spectrum of direct photons measured in heavy-ion collisions, producing a characteristic exponential dependence of the spectrum at low $p_T$. The ALICE, PHENIX and STAR Collaboration have quantified this inverse slope $T_{eff}$, measuring $\approx 200$-$400$ MeV, close to the range of QGP temperatures seen in hydrodynamic simulations...
Go to contribution page -
Sergio Barrera Cabodevila (Instituto Galego de Física de Altas Enerxías (IGFAE))06/09/2023, 15:20
We first assemble a full set of the Boltzmann Equation in Diffusion Approximation (BEDA) for studying thermalization/hydrodynamization and quark production in out of equilibrium systems. In the BEDA, the time evolution of a generic system is characterized by four space-time dependent quantities: the jet quenching parameter $\hat q$, the effective temperature $T_*$ and two others that...
Go to contribution page -
Cesar Bernardes (UNESP - Universidade Estadual Paulista (BR))06/09/2023, 15:40
A hot and dense matter exhibiting collective flow behavior with almost no viscous dissipation has been discovered in ultrarelativistic nuclear collisions. To constrain the fundamental degrees of freedom and equation of state of this matter, this talk will present an extraction of its speed of sound using head-on lead-lead collision data collected by the CMS experiment at a center-of-mass...
Go to contribution page -
Nils Sass06/09/2023, 15:40
In 2017, the STAR collaboration at the Relativistic Heavy Ion Collider (RHIC) has measured finite global angular momentum in heavy-ion collisions through a spin polarization measurement of $\Lambda$ hyperons. This measurement revealed a high angular momentum of the heavy ions and provided experimental evidence for vorticity in the quark-gluon plasma (QGP) for the first time. In order to...
Go to contribution page -
Wenbin Zhao (Wayne State University)06/09/2023, 15:40
Determining the structure of protons and nuclei at high energy is one of central goals of the heavy-ion collisions and the future Electron-Ion Collider (EIC). We first use Bayesian inference within the color glass condensate framework to extract the proton shape fluctuations from HERA exclusive vector meson production data at $x = 10^{-3}$. With this input, we employ the JIMWLK evolution for...
Go to contribution page -
Mr Yicheng Feng (Purdue University)06/09/2023, 15:40
The STAR Collaboration has reported results from a blind analysis of isobar collisions (${^{96}_{44}\text{Ru}}+{^{96}_{44}\text{Ru}}$, ${^{96}_{40}\text{Zr}}+{^{96}_{40}\text{Zr}}$) at $\sqrt{s_{\mathrm{NN}}}=200$ GeV on the search for the chiral magnetic effect (CME). Significant differences were observed in the measured multiplicity ($N$) and elliptic anisotropy ($v_{2}$) between the two...
Go to contribution page -
Florian Seck06/09/2023, 15:40
As dileptons are radiated from the extreme states of matter created in heavy-ion collisions with negligible final-state interactions, they retain the information imprinted on them at the time of their creation. Multi-differential measurements of dilepton invariant mass, momentum, and angular distributions can therefore serve as a unique tool to characterize the properties of matter in the...
Go to contribution page -
Dr Travis Dore (Universität Bielefeld)06/09/2023, 16:30
We use QCD effective kinetic theory to calculate far-from-equilibrium dynamics in the presence of quarks on an event-by-event basis within the KoMPoST framework. We present non-equilibrium response functions and dynamical evolution pertinent to the early time dynamics of heavy-ion collisions at the highest energies. The KoMPoST framework with conserved baryon, strangeness, and electric charges...
Go to contribution page -
Milan Stojanovic (Purdue University (US))06/09/2023, 16:30
The interaction of heavy quarks with the quark-gluon plasma (QGP) affects their azimuthal distribution and transverse momentum ($p_\mathrm{T}$) spectrum, hence azimuthal anisotropy coefficients ($v_{n}$) and nuclear modification factors ($R_\mathrm{AA}$) of heavy flavor hadrons are important probes of the QGP. However, a simultaneous modeling of $v_{n}$ and $R_\mathrm{AA}$ is still...
Go to contribution page -
Ishu Aggarwal06/09/2023, 16:30
Strangeness enhancement has long been considered a signature of the quark-gluon plasma formation in heavy-ion collisions. Recently, strangeness enhancement has also been observed in small systems at the LHC, but the underlying physics is not yet fully understood. This motivates studies of strange hadron production in small systems at RHIC, where the energy density of system is expected to be...
Go to contribution page -
Jinfeng Liao06/09/2023, 16:30
For heavy ion collisions in the TeV beam energy region, the large number of initial hard scatterings create a richly "doped" hot quark-gluon plasma containing many charm quarks/anti-quarks, thus providing a uniquely "charming" environment for the massive production of heavy flavor exotic hadrons such as the $\chi_{c1}$ (also known as X(3872)), X(6900) and Tcc states. While such exotic states...
Go to contribution page -
Mateusz Grunwald (Warsaw Universty of Technology)06/09/2023, 16:30
Over the past decades, the properties of dense matter have been widely concerned in connection with hypernuclei and hyperons. Their existence inside neutron stars softens the Equation of State (EoS), consequently limiting their masses to be lower than two solar masses (known as the "hyperon puzzle"). The limited number of experimental references in the region of high baryon chemical potential...
Go to contribution page -
Pragya Singh06/09/2023, 16:50
Many atomic nuclei have a deformed intrinsic shape that affects the initial-state geometry of the related collider experiments, and hence the flow coefficients observed in the final states. We use collisions of deformed nuclei to study the connection between nuclear structure at low energy and the effective theory of high energy QCD. Along with 16O, the clustered and deformed structure of 20Ne...
Go to contribution page -
Chandrodoy Chattopadhyay (North Carolina State University)06/09/2023, 16:50
We explore the far-off-equilibrium aspects of the (1+1)-dimensional early-stage evolution of a weakly-coupled quark-gluon plasma using hydrodynamics and kinetic theory. For a large set of far-off-equilibrium initial conditions we observe that the macroscopic evolution appears to violate simple rules based on the second law of thermodynamics. We provide an in-depth microscopic understanding of...
Go to contribution page -
Nima Zardoshti (CERN)06/09/2023, 16:50
Properties of partonic fragmentation in QCD depend on parton flavours in $1\rightarrow2$ splitting processes in parton showers due to the different Casimir factors of quarks and gluons, and to the different masses of light- and heavy-flavour quarks. Heavy-flavour jets provide a unique experimental tool to probe these flavour dependencies, particularly at low and intermediate transverse momenta...
Go to contribution page -
Jianhui Zhu (INFN-Padova)06/09/2023, 16:50
The study of heavy-flavour mesons and baryons in hadronic collisions provides unique access to the properties of heavy-quark hadronisation in the presence of large partonic densities, where new mechanisms of hadron formation beyond in-vacuum fragmentation can emerge. Performing these measurements in intervals of charged particle multiplicities provides sensitivity to understand whether...
Go to contribution page -
Yu Hu06/09/2023, 16:50
Heavy-ion collisions offer a new way to understand nucleon-hyperon (N-Y) interactions. The two-particle correlation, 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 $\it p$-$\Lambda$ and $\it d$-$\Lambda$ correlations can shed light on...
Go to contribution page -
Tomasz Bold (AGH Univ. of Science and Technology, Krakow (PL))06/09/2023, 17:10
The thermal fluctuations in the QGP medium formed in heavy ion collisions present themselves as event-wise $[p_\mathrm{T}]$ fluctuations in the final state. Recent studies have shown that in ultra-central collisions, fluctuations are sensitive to radial flow, random thermal motion, and nuclear deformation. They can provide constraints on the extent of thermalization of the QGP droplet. Also of...
Go to contribution page -
Chiho Nonaka06/09/2023, 17:10
We have investigated the charge-dependent anisotropic flow in high-energy heavy-ion collisions, using relativistic resistive magneto-hydrodynamics (RRMHD). For the description of time evolution of the ultraintense electromagnetic fields produced just after the collisions, construction of the relativistic resistive magneto-hydrodynamics (RRMHD) is indispensable
Go to contribution page
We construct a relativistic... -
ADITYA PRASAD DASH (University of California Los Angeles)06/09/2023, 17:10
Constraining the initial strong electromagnetic field effects, three-dimensional structure of the initial state, and the transport properties of the Quark-Gluon Plasma (QGP) at different temperatures ($T$), and baryon chemical potentials ($\mu_B$) are critical objectives of the heavy-ion program at RHIC. The dominance of Faraday+Coulomb effect during the initial stages of non-central heavy ion...
Go to contribution page -
Dr Peter Petreczky (BNL)06/09/2023, 17:10
The core goal of heavy-ion collision experiments is to shed light on how the phases and properties of strong-interaction matter arise from the fundamental constituents and interactions of Quantum chromodynamics (QCD). To this end, heavy-ion collision experiments are searching for universal signs of criticality in the QCD phase diagram by measuring various macroscopic quantities. When those...
Go to contribution page -
Ota Kukral (University of California Davis (US))06/09/2023, 17:10
One of the most unexpected findings of the LHC heavy ion program is the observation of stronger suppressions of the excited quarkonium states compared to the ground states in proton-lead (pPb) collisions. Such differences imply dissociation effects occurring at late stages, after the evolution of heavy quark pairs into well-defined physical states. The variety of binding energies within the...
Go to contribution page -
Joaquin Grefa06/09/2023, 17:30
By using the gravity/gauge correspondence, we employ an Einstein-Maxwell-dilaton model to compute the equilibrium and out-of-equilibrium properties of a hot and baryon-rich strongly coupled quark-gluon plasma. The family of 5-dimensional holographic black holes, constrained to mimic the lattice QCD equation of state at zero density, is used to investigate the temperature and baryon chemical...
Go to contribution page -
Sara Pucillo (Universita e INFN Torino (IT))06/09/2023, 17:30
Among the most iconic results of Run 1 and Run 2 of the LHC is the observation of enhanced production of (multi-)strange to non-strange particles, gradually rising from low-multiplicity to high-multiplicity pp or p-Pb collisions and reaching values close to those measured in peripheral Pb-Pb collisions. More insightful information about the production mechanism could be provided by measuring...
Go to contribution page -
Sigtryggur Hauksson (IPhT - CEA)06/09/2023, 17:30
A central question in heavy-ion collisions is how the initial far-from-equilibrium medium evolves and thermalizes. In this work we use the two-particle irreducible (2PI) effective action for the first time to answer this question. This requires including the fast longitudinal expansion that characterizes heavy-ion collisions. Our framework, the 2PI effective action, is non-perturbative and...
Go to contribution page -
Dr Yu Shi (Shandong University)06/09/2023, 17:30
With the tremendous accomplishments of RHIC and the LHC experiments and the advent of the future electron-ion collider on the horizon, the quest for compelling evidence of the color glass condensate (CGC) has become one of the most aspiring goals in the high energy quantum chromodynamics research. Pursuing this question requires developing the precision test of the CGC formalism. By...
Go to contribution page -
Zhanduo Tang06/09/2023, 17:30
We utilize a previously constructed thermodynamic T-matrix approach to the quark-gluon plasma (QGP) to calculate Wilson line correlator of a static quark antiquark pair and apply them to the results from realistic 2+1-flavor lattice-QCD (lQCD) computations. Earlier reconstructions of static quarkonium spectral functions from lQCD data have indicated an absence of screening of the heavy-quark...
Go to contribution page -
Soumya Mohapatra (Columbia University (US))06/09/2023, 17:50
A key open question in the study of multi-particle production in high-energy $pp$ collisions is the relationship between the "ridge" - observed azimuthal correlations between particles in the underlying event that extend over all rapidities and hard or semi-hard scattering processes. In particular, it is not known whether jets or their soft fragments are correlated with particles in the...
Go to contribution page -
Patrycja Anna Potepa (AGH University of Krakow (PL))06/09/2023, 17:50
Proton-lead collisions at LHC energies offer a unique possibility to investigate initial state effects in nuclear collisions. Thanks to its wide acceptance, ATLAS can measure several probes that can help characterize these effects over a wide kinematic range. By analyzing the centrality dependence of dijet production, it is possible to investigate the suppression of dijet events in central...
Go to contribution page -
Bruno Sebastian Scheihing Hitschfeld (Massachusetts Institute of Technology)06/09/2023, 17:50
Suppression of open heavy flavors and quarkonia in heavy-ion collisions is among the most informative probes of the quark-gluon plasma (QGP). Interpreting the full wealth of data obtained from the collision events requires a precise understanding of the evolution of heavy quarks and quarkonia as they propagate through the nearly thermal and strongly coupled plasma. Only in the past few years,...
Go to contribution page -
Prof. Veronica Dexheimer (Kent State Universtity)06/09/2023, 17:50
We study consistently the effects of magnetic field on hot and dense matter. In particular, we look for differences that arise due to assumptions that reproduce the conditions produced in particle collisions or astrophysical scenarios, such as in the core of fully evolved neutron stars. We assume the magnetic field to be either constant or follow a profile extracted from general relativity...
Go to contribution page -
Dr Raju Venugopalan (Brookhaven National Laboratory)06/09/2023, 17:50
A double copy between 2 > N QCD amplitudes and Gravity amplitudes at high energies was first discovered by Lipatov in 1981. In published work with G. Dvali[1], we showed how a double copy between Black Holes and the CGC arises, with both systems saturating the Bekenstein bound. We discuss how this dual picture points to some missing features of the CGC. Most importantly theoretical techniques...
Go to contribution page -
Jiayin Sun (Universita e INFN, Cagliari)07/09/2023, 08:30Oral
-
David Dobrigkeit Chinellato (University of Campinas UNICAMP (BR))07/09/2023, 09:00Oral
-
Yuuka Kanakubo (University of Jyväskylä)07/09/2023, 09:30Oral
-
Francesca Bellini (Universita e INFN, Bologna (IT))07/09/2023, 10:00Oral
-
Ashish Pandav07/09/2023, 11:00Oral
-
Volodymyr Vovchenko (University of Houston)07/09/2023, 11:30Oral
-
Jamie Karthein (MIT)07/09/2023, 12:00Oral
-
Heikki Mäntysaari (University of Jyvaskyla (FI))08/09/2023, 08:30Oral
-
Soeren Schlichting (Universität Bielefeld)08/09/2023, 09:00Oral
-
Jürgen Berges (Heidelberg University)08/09/2023, 09:30Oral
-
Raphaelle Bailhache (Goethe University Frankfurt (DE))08/09/2023, 10:00Oral
-
Daniel Brandenburg (Ohio State University)08/09/2023, 11:00Oral
-
Aihong Tang (Brookhaven National Laboratory)08/09/2023, 11:30Oral
-
Martin J. Savage08/09/2023, 12:00Oral
-
Laura Brittany Havener (Yale University (US))08/09/2023, 14:00Oral
-
Yeonju Go (University of Colorado Boulder (US))08/09/2023, 14:30Oral
-
Daniel Pablos (INFN Torino)08/09/2023, 15:00Oral
-
Fabrizio Grosa (CERN)08/09/2023, 15:30Oral
-
Andre Govinda Stahl Leiton (CERN)08/09/2023, 16:30Oral
-
Miguel Angel Escobedo Espinosa08/09/2023, 17:00Oral
-
Anna Maria Stasto (Penn State)09/09/2023, 08:30Oral
-
Luciano Musa (CERN)09/09/2023, 09:00Oral
-
Helen Caines (Yale University (US))09/09/2023, 09:30Oral
-
Claudia Ratti09/09/2023, 10:45
-
Maria Stefaniak09/09/2023, 10:46
The coherent description of nuclear matter properties at high baryon densities is of utmost importance. The limited number of experimental references in the region of the phase diagram corresponding to Neutron Stars (NS) and NS mergers poses major challenges for constructing a universal Equation of State. The matter created in heavy-ion collisions at the HADES experiment can be characterized...
Go to contribution page -
Henry Hirvonen (University of Jyväskylä (FI))09/09/2023, 10:52
We train a deep convolutional neural network to predict hydrodynamic results for flow coefficients, average $p_T$ and charged particle multiplicities in ultrarelativistic heavy-ion collisions from the initial energy density profiles event-by-event [1]. We show that the network can be trained accurately enough so that it can reliably predict the hydrodynamic results for the flow coefficients...
Go to contribution page -
Yu-Chen (Janice) Chen (Massachusetts Institute of Technology)09/09/2023, 10:58
We present measurements of two-particle angular correlations of charged particles emitted in high-energy $e^+e^-$ collisions using data collected by the ALEPH detector at LEP between 1992 and 2000. The correlation functions are measured over a wide range of pseudorapidity and azimuthal angle as a function of charged particle multiplicity. Previous measurement with LEP1 data at $\sqrt{s}=91$...
Go to contribution page -
Yuanjing Ji (Lawrence Berkeley National Lab)09/09/2023, 11:04
Hypernuclei are bound states of nuclei with one or more hyperons. Precise measurements of hypernuclei properties and their production yields in heavy-ion collisions are crucial for the understanding of their production mechanisms. The strangeness population factor, $S_{\rm A}=(^{A}_{\Lambda}\mathrm{H}/^{A}\mathrm{He})/(\Lambda/p)$ (A=3,4), is directly related to the ratio of light nuclei and...
Go to contribution page -
Anabel Romero (Univ. Illinois at Urbana Champaign (US))09/09/2023, 11:10
Measurements of dijets that traverse a quark-gluon plasma can provide insights into the jet energy loss in heavy ion collisions. Furthermore, considering jets of various sizes can help elucidate how the parton energy is transferred to the medium as well as the medium response. Measurements of the dijet momentum imbalance and nuclear modification factors for leading and subleading jet pairs...
Go to contribution page -
Shin-ei Fujii (Sophia Univ.)09/09/2023, 11:16
Nowadays, relativistic dissipative hydrodynamics including effects of finite viscosities is commonly used to extract transport properties of the quark gluon plasma (QGP), such as shear viscosity and bulk viscosity, from experimental data. However, according to the fluctuation-dissipation relation (FDR) in non-equilibrium statistical physics, fluctuations and dissipation are always accompanied...
Go to contribution page -
Desmond Mzamo Shangase (University of Michigan (US))09/09/2023, 11:22
Investigating particle production in small systems has become instrumental
Go to contribution page
in probing non-perturbative contributions to hadron structure and hadroniza-
tion mechanisms. The LHCb spectrometer unique geometry at the LHC along
with its particle identification and tracking capabilities allow for new studies
of the multiplicity-dependent enhancement of strange hadrons in the forward
region.... -
Anton Albert Riedel (Technische Universitaet Muenchen (DE))09/09/2023, 11:28
Understanding the strong interaction between nucleons and hyperons is fundamental for the microscopic description of bound systems as well as for modeling the equation of the state of dense stellar objects, such as neutron stars. Conventional scattering and hypernuclei measurements are insufficient to support theoretical predictions about the interaction between hadrons containing strangeness....
Go to contribution page -
Brandon Blankenship09/09/2023, 11:34
One of the most prominent features of the quark gluon plasma is its near-perfect
Go to contribution page
fluid behavior. An important outstanding question is establishing the degree to which
heavy flavor particles flow with the bulk system. Measurements of the Fourier coefficient
v2 of light and heavy flavor hadrons can provide insight into the properties of the
medium. At low transverse momentum (pT) the mass... -
Cheng-Wei Shih (National Central University (TW))09/09/2023, 11:40
The sPHENIX project is a new detector experiment at the Relativistic Heavy Ion Collider at BNL. Its aim is to study strongly interacting Quark-Gluon Plasma and cold-QCD by measuring photons, jets, jet correlations, and Upsilon family with high precision. To achieve these goals, a precise tracking system is necessary. The tracking system of the sPHENIX detector consists of the MVTX, TPC, TPOT,...
Go to contribution page -
09/09/2023, 11:45
-
09/09/2023, 12:00
-
Dirk Rischke (University Frankfurt)09/09/2023, 12:15Oral
-
09/09/2023, 12:35
-
Phiala ShanahanOral
Choose timezone
Your profile timezone: