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Igor Altsybeev (Technische Universitaet Muenchen (DE))28/11/2022, 16:30
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Md Nasim (Indian Institute of Science Education and Research, Berhampur)28/11/2022, 17:00
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Simon Spies (Johann-Wolfgang-Goethe Univ. (DE))28/11/2022, 17:30
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Andras Laszlo (Wigner Research Centre for Physics (Wigner RCP) (HU))28/11/2022, 18:10
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Norbert Herrmann (Univ. Heidelberg)28/11/2022, 18:40
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Jaki Noronha Hostler (University of Illinois Urbana-Champaign)28/11/2022, 19:20
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Owe Philipsen28/11/2022, 19:50
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Heng-Tong Ding (CCNU, China)28/11/2022, 20:20
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Ashish Pandav (National Institute of Science Education and Research, Jatni, India)29/11/2022, 16:00
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Johannès Jahan (Subatech (FR))29/11/2022, 16:30
Within the framework of the exploration of the nuclear matter phase diagram, the susceptibilities of conserved charges are useful tools to probe the existence of a 1st 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...
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Volodymyr Kuznietsov (Bogolyubov Institute for Theoretical Physics of the National Academy of Sciences of Ukraine)29/11/2022, 17:00
We study fluctuations of particle number in the presence of a critical point by utilizing molecular dynamics simulations of the classical Lennard-Jones fluid in a periodic box. The numerical solution of the $N$-body problem naturally incorporates all correlations, exact conservation laws, and finite size effects, allowing us to study the fluctuation signatures of the critical point in a...
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Piotr Podlaski (University of Warsaw (PL))29/11/2022, 17:20
NA61/SHINE is a multipurpose fixed-target experiment at the CERN Super Proton Synchrotron. The main goals of the NA61/SHINE strong interactions program are to discover the critical point of strongly interacting matter and study the properties of the onset of deconfinement. To reach these goals, hadron production measurements are performed in the form of a two-dimensional scan by varying...
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Volodymyr Vovchenko (Institute for Nuclear Theory, University of Washington)29/11/2022, 17:40
The centrality dependence of the $p/\pi$ ratio measured by the ALICE Collaboration in 5.02 TeV Pb-Pb collisions indicates a statistically significant suppression with the increase of the charged multiplicity, once the centrality-correlated part of the systematic uncertainty is eliminated from the data. We argue that this behavior can be attributed to the presence of baryon annihilation in the...
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Aswini Kumar Sahoo (IISER,Berhampur)29/11/2022, 18:10
Resonances of different lifetimes can be used to probe the hadronic stage of the fireball produced in relativistic heavy-ion collisions. For example, the $K^{*0}$ meson, with a lifetime of $\sim$ 4.16 fm/c, decays within the fireball and its decay daughters may experience in-medium effects like re-scattering and regeneration. On the other hand, the $\phi$ meson, having a long lifetime of...
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Jishnu Goswami (RIKEN Center for Computational Science)29/11/2022, 18:30
The quantum chromodynamics (QCD) equation of state (EoS) at finite temperature
and density is of fundamental importance for the characterization of hot and
dense, strongly interacting matter created in heavy ion collision experiments.
It also has important applications in hydrodynamic simulations and
the EoS of the early universe.Strongly interacting dense matter created in...
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Xiujun Li (USTC)29/11/2022, 18:50
Hypernuclei are bound states of nucleons and hyperons. The hyperon$-$nucleon (Y-N) interaction, which is an essential ingredient in the equation of state of high-baryon-density matter, remains poorly constrained. Also, the production mechanisms of hypernuclei are currently not well understood. Precise measurements of hypernuclei properties and production yields can shed light on their...
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Lipei Du (McGill University)29/11/2022, 19:10
Using a (3+1)D hybrid hydrodynamic + hadronic transport framework with parametric initial conditions, we study the rapidity-dependent directed flow $v_1(y)$ of identified particles, including pions, kaons, protons, and lambdas, from 7.7 GeV to 200 GeV. The dynamics in the beam direction is first constrained using the measured pseudo-rapidity distribution of charged particles and the net...
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David Clarke29/11/2022, 19:40
We present lattice QCD calculations of the position of Lee-Yang edge singularities in the complex chemical potential plane. The singularities have been obtained by the multi-point Pade approach on lattice QCD data of the net baryon number density at imaginary chemical potential. This approach has been used recently to extract the correct scaling of singularities near the Roberge-Weiss...
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Jamie Karthein (MIT)29/11/2022, 20:00
With the highly anticipated results from the Beam Energy Scan II program at RHIC coming soon, an understanding of particle-number fluctuations and their significance as a potential signature of a possible QCD critical point is crucial. Early works that embarked on this endeavor sought to estimate the fluctuations due to the presence of a critical point assuming they stay in equilibrium [1,2]....
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Maneesha Sushama Pradeep (University of Illinois at Chicago)29/11/2022, 20:20
The traditional Cooper-Frye freeze-out procedure becomes inadequate in heavy ion collisions that pass near a critical point, where fluctuations in the hydrodynamic densities (not just the mean densities) must be passed faithfully from the fluctuating fluid before freeze-out to the fluctuating particles after. Furthermore, the dynamics of the fluctuations must be computed, since because of...
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Sanghoon Lim (Pusan National University (KR))30/11/2022, 16:00
There have been extensive studies to measure long-range correlations among produced particles from small collision systems, and the experimental results clearly indicate collective flow phenomena in these systems. Previously, PHENIX published elliptic and triangular flow results in high multiplicity $p$+Au, $d$+Au, and $^{3}$He+Au collisions. The results can be described by hydrodynamics...
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Wenbin Zhao (Wayne State University)30/11/2022, 16:20
STAR and PHENIX Collaborations have recently reported measurements of the anisotropic flow coefficients in p+Au, d+Au, and $^{3}$He+Au collisions at the Relativistic Heavy Ion Collider (RHIC). However, some tension between STAR and PHENIX data has not been fully resolved. Because the STAR and PHENIX Collaborations applied different pseudorapidity ranges to analyze the two-particle...
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Shuai Zhou (CCNU)30/11/2022, 16:40
The main purpose of the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory (BNL), is to create new form of matter call Quark Gluon Plasma (QGP) in the laboratory and study quantum chromodynamics (QCD) phase structure. The initial anisotropy in the coordinate space is translated into the anisotropy in the momentum space. The elliptic flow ($v_2$) is defined as the second...
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Cameron Racz (University of California, Riverside)30/11/2022, 17:10
Directed and elliptic flow have been extensively studied in heavy-ion collisions while triangular flow ($v_3$) could be further explored. $v_3$ could prove very useful as a signal for Quark-Gluon Plasma (QGP) formation due to its sensitivity to QGP viscosity and the possibility that it is less affected by transport dynamics at very low energies [1]. In this talk, we will present the current...
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Jakub Cimerman (Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University)30/11/2022, 17:30
The hydrodynamic modelling of heavy-ion collisions at energies from few to tens of GeV per NN pair brings new challenges as compared to simulations at top RHIC or LHC energies. The contraction of the incoming nuclei is much weaker resulting in a long inter-penetration phase and a more complex initial-state geometry. Conventional hydrodynamic models, where the fluid phase starts at a fixed...
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Prabhupada Dixit30/11/2022, 17:50
Anisotropic flow of the final state particles produced in heavy-ion collisions is one of the important probes to study the properties of the matter produced in the collisions. Elliptic flow ($v_{2}$) and triangular flow ($v_{3}$) parameters are the second and third order coefficients in the Fourier expansion of azimuthal distributions of the final state particles in the momentum space. $v_{2}$...
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Xin An (NCBJ)30/11/2022, 18:20
First-principle quantitative description of fluctuation dynamics is essential for interpreting the upcoming results of the phase II of the Beam Energy Scan experiment aimed at discovering the QCD critical point. Such a formalism, based on relativistic hydrodynamics, has been developed for Gaussian fluctuations previously. Also, in our previous work, the evolution equations for non-Gaussian...
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Michał Barej30/11/2022, 18:40
The quantum chromodynamics (QCD) phase diagram is not yet well explored. In particular, there is a significant, theoretical and experimental, effort to search for the predicted first-order phase transition and the corresponding critical endpoint between the hadronic matter and quark-gluon plasma. The fluctuations of, e.g., net-baryon number, electric charge, or strangeness are known to be...
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Grégoire PIHAN30/11/2022, 19:00
A non-monotonic net-proton kurtosis as a function of the collision
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energy for very central collisions has been suggested and may be
confirmed by recent BES-II program results advocating the existence of
the QCD critical point. Fluctuations at the origin of this peculiar
behavior are produced in the highly dynamic environment of
ultra-relativistic collisions. Especially, the violent... -
Roman Poberezhnyuk (Bogolyubov Institute for Theoretical Physics)30/11/2022, 19:30
We present the analytic description of particle number (conserved charge) fluctuations within the subvolume of the thermal system in the coexistence region of the first order phase transition. Different approximations are applied for the metastable states, for the region of spinodal decomposition [1] and in the special case of a homogeneous system [2]. The results are checked within...
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Jan Hammelmann30/11/2022, 19:50
We study the evolution of critical fluctuations in an expanding system within a hadronic transport approach.
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The system is initialized with particle number distributions coupled to the critical mode and the hadron gas then evolves in time with realistic hadronic interactions \cite{Hammelmann:2022yso}.
The initialization of the system with critical fluctuations is achieved by coupling the... -
Noriyuki Sogabe (University of Illinois Chicago)30/11/2022, 20:10
Recently, a non-equilibrium effective field theory framework has been formulated for fluctuating hydrodynamics [1]. In this talk, we present an example of applying this novel formalism to study the critical properties of QCD. In the view that non-Gaussian fluctuations of baryon density are important for the QCD critical point search, we derive evolution equations for the critical non-Gaussian...
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Tobiasz Czopowicz (Jan Kochanowski University, Warsaw University of Technology)01/12/2022, 16:00
The existence and location of the QCD critical point is an object of both experimental and theoretical studies. The comprehensive data collected by the NA61/SHINE during a two-dimensional scan in beam momentum (13A-150A GeV/c) and system size (p+p, p+Pb, Be+Be, Ar+Sc, Xe+La, Pb+Pb) allows for a systematic search for the critical point – a search for a non-monotonic dependence of...
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Travis Dore (University of Illinois at Urbana-Champaign)01/12/2022, 16:20
In this work, we study the effects that different critical regions have on hydrodynamic trajectories both with and without viscous effects. Implementing the parametrized BEST collaboration equation of state [1,2], we find that the size and shape of the critical region is an important factor in determining whether the system will experience critical effects for a variety of initial conditions....
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Masakiyo Kitazawa01/12/2022, 16:40
We study phase structure and critical point of QCD with heavy quarks at nonzero temperature by lattice QCD Monte Carlo simulations. We perform numerical simulations with large spatial volumes up to the aspect ratio $N_s/N_t=15$. The large spatial volume allows us to investigate the scaling behavior around the critical point in detail. To realize the large-volume simulations, we employ rather...
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Dingwei Zhang (CCNU)01/12/2022, 17:10
In high-energy nuclear collisions, the light nuclei production is predicted to be sensitive to the local baryon density fluctuations and can be used to probe the QCD phase transition. For example, the ratio of proton ($N_{p}$) and triton ($N_{t}$) to deuteron ($N_{d}$) yields, which is defined as $N_{t}$$\times$$N_{p}$/$N_{d}^{2}$, is considered sensitive observable to search for the QCD...
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开佳 孙01/12/2022, 17:30
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...
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Mauricio Hippert Teixeira (University of Illinois at Urbana-Champaign)01/12/2022, 17:50
Predictions for the QCD equation of state across the phase diagram 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...
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Débora Mroczek (University of Illinois at Urbana-Champaign)01/12/2022, 18:20
Functional forms of the neutron star Equation of State (EoS) are required to extract the viable EoS band from neutron star mergers. Typically, one of three methods are used-- spectral functions, piecewise polytropes, or gaussian process. However, realistic nuclear EoS, containing deconfined quarks or hyperons, present nontrivial features in the speed of sound such as bumps, kinks and plateaus....
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Michał Marczenko (University of Wrocław)01/12/2022, 18:40
Generating an ensemble of equations of state that fulfill multimessenger constraints, we statistically determine the properties of dense matter found inside neutron stars (NSs). We calculate the speed of sound and trace anomaly and demonstrate that they are driven towards their conformal values at the center of maximally massive NSs. The local peak of the speed of sound is shown to be located...
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Udita Shukla (Max Planck Institute for the Physics of Complex Systems/University of Wroclaw)01/12/2022, 19:00
Diquark gap calculated within the framework of a micro-physical (non-local Nambu-Jona Lasinio) model coupled to color and electric neutrality constraints and fit to a μ-dependent ansatz, is employed to an algebraic quark EoS (equation of state) [1]. The effect of this μ-dependent diquark gap is investigated against that of a constant (diquark) gap in the same (algebraic) EoS.
Additional...
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Roy Lacey01/12/2022, 19:30
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Anar Rustamov (National Nuclear Research Center (AZ))01/12/2022, 19:50
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Feng Li (Lan Zhou University)01/12/2022, 20:10
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Travis Dore (Universität Bielefeld)01/12/2022, 20:30
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Udita Shukla (Max Planck Institute for the Physics of Complex Systems/University of Wroclaw)01/12/2022, 20:50
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Md Hasanujjaman (Darjeeling Govt. College, India)02/12/2022, 16:00
The structure factor ($\mathcal{S}_{nn}\,(k,\omega)$) of dynamical density fluctuation is studied in the presence of the out-of-equilibrium modes ($\phi$) within the scope of relativistic viscous hydrodynamics. The $\mathcal{S}_{nn}\,(k,\omega)$ without the $\phi$ modes shows three peaks of Lorentzian types, identified as one Rayleigh peak and two Brillouin peaks, symmetrically situated about...
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Nadine Attieh (Subatech)02/12/2022, 16:20
Heavy ion collisions that aim to probe phase transitions and critical phenomena require robust predictions. In order to scan the QCD phase diagram and gain insight into the exact nature of these transitions and the conjectured critical point, numerical simulations are increasingly used.
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Mapping a system onto a finite lattice, with discrete spatial steps, effectively cuts off the theory in... -
Bruno Sebastian Scheihing Hitschfeld (Massachusetts Institute of Technology)02/12/2022, 16:40
In this talk we demonstrate that the early stages of the bottom-up thermalization scenario [1] are well described by the adiabatic hydrodynamization framework. All of the qualitative features exhibited in QCD effective kinetic theory (EKT) simulations at weak coupling [2] are captured by the emergence of an effective low-energy instantaneous ground state for the 1-particle gluon distribution...
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Navid Abbasi (Lanzhou University)02/12/2022, 17:10
Near the critical point in the QCD phase diagram, hydrodynamics breaks down at a momentum where the frequency of the fastest hydrodynamic mode becomes comparable with the decay rate of the slowest non-hydrodynamic mode. Hydro+ was developed as a framework which extends the range of validity of hydrodynamics beyond that momentum. In this talk, we first discuss the analytic structure of the...
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Friederike Ihssen (ITP Heidelberg)02/12/2022, 17:30
Lattice simulations and functional approaches established that QCD has no phase transition at small baryon chemical potential. However, second order phase transitions are expected at the conjectured critical endpoint at larger chemical potential and in the chiral limit at vanishing chemical potential.
These phase transitions leave an imprint as Lee-Yang edge singularities and can be found...
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Niklas Schild02/12/2022, 17:50
Anisotropic flow serves as a central observable for characterising collectivity in heavy-ion collisions. While all particles experience flow, virtual photons, decaying into lepton pairs, may serve as particularly interesting probes in this context. They can penetrate the strongly interacting medium and deliver information about conditions in the early stages of maximum temperature and density....
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Junhong Liu (Central China Normal University)02/12/2022, 18:20
QCD phase structure in the nonzero magnetic fields has attracted intensive interest recently as the strong magnetic field is expected to be present in the early stage of peripheral heavy-ion collisions, early universe and magnetars. In this talk we show that fluctuations of and correlations among net baryon number, strangeness and electrical charge can be useful to probe the imprint of the...
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Agnieszka Sorensen (University of Washington)02/12/2022, 18:40
We study particle number fluctuations in infinite nuclear matter using hadronic transport simulations. We focus on matter initialized at a series of thermodynamically and mechanically stable points in the phase diagram, and in particular on the influence of the critical point on the equilibrated values of the fluctuations. We compare fluctuations from hadronic transport simulations against the...
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Shi Yin02/12/2022, 19:00
Calculations of baryon number fluctuations at finite temperature and density in Ref.[1] have been extended to regime of large baryon chemical potentials with 400 MeV $\leq \mu_B\leq 650$ 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...
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Dylan Neff02/12/2022, 19:20
Quark-Gluon Plasma (QGP), a novel state describing the bulk properties of QCD matter at high energies, can be experimentally probed with relativistic nucleus-nucleus collisions. The nature of the transition between the QGP phase and the final state hadron gas phase is yet to be established. The Beam Energy Scan (BES) program at RHIC aims at searches for a possible critical point in the QCD...
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Fernando Antonio Flor (University of Houston (US))02/12/2022, 19:50
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Marek Gazdzicki (Jan Kochanowski University (PL))02/12/2022, 20:00
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Maja Katarzyna Mackowiak-Pawlowska (Warsaw University of Technology (PL))02/12/2022, 20:10
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Nu Xu02/12/2022, 20:20
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Norbert Herrmann (Univ. Heidelberg)02/12/2022, 20:30
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Enrico Scomparin (Universita e INFN Torino (IT))02/12/2022, 20:45
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