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The presence of a critical point in the QCD phase diagram can deform the trajectories describing the evolution of the expanding fireball in the $\mu_B-T$ phase diagram. If the average emission time of hadrons is a function of transverse…

Nuclear Theory · Physics 2008-11-26 M. Asakawa , S. A. Bass , B. Müller , C. Nonaka

Fireballs created in relativistic heavy-ion collisions at different beam energies have been argued to follow different trajectories in the QCD phase diagram in which the QCD critical point serves as a landmark. Using a (1+1)-dimensional…

Nuclear Theory · Physics 2021-09-16 Lipei Du , Xin An , Ulrich Heinz

Fireballs created in relativistic heavy-ion collisions at different beam energies have been argued to follow different trajectories in the QCD phase diagram in which the QCD critical point serves as a landmark. Using a (1+1)-dimensional…

High Energy Physics - Phenomenology · Physics 2022-01-19 Lipei Du , Xin An , Ulrich Heinz

Upcoming experimental programs will look for signatures of a possible critical point in the QCD phase diagram in fluctuation observables. To understand and predict these signatures, one must account for the fact that the dynamics of any…

High Energy Physics - Phenomenology · Physics 2020-12-30 Krishna Rajagopal , Gregory Ridgway , Ryan Weller , Yi Yin

We propose the transverse velocity ($\beta_T$) dependence of the anti-deuteron to deuteron ratio as a new observable to search for the QCD critical point in heavy-ion collisions. The QCD critical point can attract the system evolution…

Nuclear Theory · Physics 2019-12-23 Ning Yu , Dingwei Zhang , Xiaofeng Luo

The space-time evolution of the hot and dense fireball of quarks and gluons produced in ultra-relativistic heavy-ion collisions at non-zero baryonic chemical potential and temperature has been studied by using relativistic viscous causal…

Nuclear Theory · Physics 2023-05-10 Sushant K. Singh , Jan-e Alam

We formulate the QCD critical point focusing effect on transverse velocity ($\beta_{t}$) dependence of antiproton to proton ($\bar{p}/p$) ratio, which was recently proposed by Asakawa {\it et al.} as an experimental signature of QCD…

Nuclear Theory · Physics 2009-04-17 Xiaofeng Luo , Ming Shao , Cheng Li , Hongfang Chen

We analyze the evolution of hydrodynamic fluctuations in a heavy ion collision as the system passes close to the QCD critical point. We introduce two small dimensionless parameters $\lambda$ and $\Delta_s$ to characterize the evolution.…

Nuclear Theory · Physics 2019-10-09 Yukinao Akamatsu , Derek Teaney , Fanglida Yan , Yi Yin

We investigate the evolution of the net-proton kurtosis and the kurtosis of the chiral order parameter near the critical point in the model of nonequilibrium chiral fluid dynamics. The order parameter is propagated explicitly and coupled to…

High Energy Physics - Phenomenology · Physics 2016-03-23 Christoph Herold , Marlene Nahrgang , Yupeng Yan , Chinorat Kobdaj

We propose a new strategy for the experimental search of the QCD phase transition in heavy ion collisions: One may tune collision energy around the point where the lifetime of the fireball is expected to be longest. We demonstrate that the…

High Energy Physics - Phenomenology · Physics 2009-10-28 C. M. Hung , E. V. Shuryak

The QCD critical point is a landmark point on the QCD phase diagram, with potential connections to a plethora of deep questions on the properties of thermal nuclear matter. Future heavy-ion collision experiments, in particular, the second…

Nuclear Theory · Physics 2018-11-28 Yi Yin

Search for the conjectured QCD critical point is one of the major scientific goals for the Beam Energy Scan program at RHIC. The growth of the correlation length is a universal feature for systems near criticality, and bulk viscosity…

Nuclear Theory · Physics 2018-03-14 Akihiko Monnai , Swagato Mukherjee , Yi Yin

We give a general overview about the approaches to study the phase diagram of QCD. Thereafter, we examine the evolution of a fireball in a chiral fluid dynamic model including nonequilibrium effects.

Nuclear Theory · Physics 2011-11-17 Marlene Nahrgang , Marcus Bleicher

The Beam Energy Scan program at the Relativistic Heavy Ion Collider (RHIC) is searching for the QCD critical point. The main signal for the critical point is the kurtosis of the distribution of proton yields obtained on an event-by-event…

The beam energy scan program at RHIC provides data on net-proton number fluctuations with the goal to detect the QCD critical end point and first-order phase transition. Interpreting these experimental signals requires a vital understanding…

High Energy Physics - Phenomenology · Physics 2022-08-17 Christoph Herold , Ayut Limphirat , Poramin Saikham , Marlene Nahrgang , Tom Reichert , Marcus Bleicher

The search for the critical point of QCD in heavy-ion collision experiments has sparked enormous interest with the completion of phase I of the RHIC beam energy scan. Here, I review the basics of the thermodynamics of the QCD phase…

Nuclear Theory · Physics 2016-11-23 Marlene Nahrgang

We investigate the effect of the quantum chromodynamics (QCD) critical point on the isentropic trajectories in the QCD phase diagram. We point out that the universality of the critical equation of state and the third law of thermodynamics…

Nuclear Theory · Physics 2024-10-07 Maneesha Sushama Pradeep , Noriyuki Sogabe , Mikhail Stephanov , Ho-Ung Yee

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…

Nuclear Theory · Physics 2022-07-27 Navid Abbasi , Matthias Kaminski

In this work, we study the lensing effect of the QCD critical point on hydrodynamic trajectories, and its consequences on the net-proton kurtosis $\kappa_4$. Including critical behavior by means of the BEST Collaboration equation of state…

We investigate the hydrodynamics of the QCD plasma using dimensionless numbers built from the thermodynamics and transport theory of the plasma and characteristic dimensions of the fireball produced in heavy-ion collisions. We find that by…

High Energy Physics - Phenomenology · Physics 2007-05-23 Sourendu Gupta
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