Entropy production and reheating at the chiral phase transition

被引：15

作者：

Herold, Christoph ^{[1
]}

Kittiratpattana, Apiwit ^{[1
]}

Kobdaj, Chinorat ^{[1
]}

Limphirat, Ayut ^{[1
]}

Yan, Yupeng ^{[1
]}

Nahrgang, Marlene ^{[2
]}

Steinheimer, Jan ^{[3
]}

Bleicher, Marcus ^{[3
,4
,5
,6
]}

机构：

[1] Suranaree Univ Technol, Sch Phys, 111 Univ Ave, Nakhon Ratchasima 30000, Thailand

[2] Univ Nantes, UMR 6457, SUBATECH, IMT Atlant,IN2P3 CNRS, 4 Rue Alfred Kastler, F-44307 Nantes 3, France

[3] Frankfurt Inst Adv Studies, Ruth Moufang Str 1, D-60438 Frankfurt, Germany

[4] Goethe Univ Frankfurt, Inst Theoret Phys, Max von Laue Str 1, D-60438 Frankfurt, Germany

[5] GSI Helmholtzzentrum Schwerionenforsch GmbH, Planckstr 1, D-64291 Darmstadt, Germany

[6] Forschungzentrum Julich, John von Neumann Inst Comp, D-52425 Julich, Germany

来源：

PHYSICS LETTERS B | 2019年 / 790卷

关键词：

Chiral phase transition; Nonequilibrium dynamics; Heavy-ion collisions; COLLISIONS; FLUCTUATION; EVOLUTION; DYNAMICS; POINT; MODEL;

D O I：

10.1016/j.physletb.2019.02.004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the production of entropy in the context of a nonequilibrium chiral phase transition. The dynamical symmetry breaking is modeled by a Langevin equation for the order parameter coupled to the Bjorken dynamics of a quark plasma. We investigate the impact of dissipation and noise on the entropy and explore the possibility of reheating for crossover and first-order phase transitions, depending on the expansion rate of the fluid. The relative increase in S/N is estimated to range from 10% for a crossover to 100% for a first-order phase transition at low beam energies, which could be detected in the pion-to-proton ratio as a function of beam energy. (C) 2019 The Authors. Published by Elsevier B.V.

引用

页码：557 / 562

页数：6

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