Entropy production and reheating at the chiral phase transition

Herold, Christoph (School of Physics, Suranaree University of Technology, 111 University Avenue, Nakhon Ratchasima, 30000, Thailand) ; Kittiratpattana, Apiwit (School of Physics, Suranaree University of Technology, 111 University Avenue, Nakhon Ratchasima, 30000, Thailand) ; Kobdaj, Chinorat (School of Physics, Suranaree University of Technology, 111 University Avenue, Nakhon Ratchasima, 30000, Thailand) ; Limphirat, Ayut (School of Physics, Suranaree University of Technology, 111 University Avenue, Nakhon Ratchasima, 30000, Thailand) ; Yan, Yupeng (School of Physics, Suranaree University of Technology, 111 University Avenue, Nakhon Ratchasima, 30000, Thailand) ; Nahrgang, Marlene (SUBATECH, UMR 6457, Université de Nantes, IMT Atlantique, IN2P3/CNRS, 4 rue Alfred Kastler, Nantes cedex 3, 44307, France) ; Steinheimer, Jan  (Frankfurt Institute for Advanced Studies, Ruth-Moufang-Str. 1, Frankfurt am Main, 60438, Germany) ; Bleicher, Marcus (Frankfurt Institute for Advanced Studies, Ruth-Moufang-Str. 1, Frankfurt am Main, 60438, Germany) (Institut für Theoretische Physik, Goethe Universität Frankfurt, Max-von-Laue-Strasse 1, Frankfurt am Main, D-60438, Germany) (GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1, Darmstadt, 64291, Germany) (John von Neumann-Institut für Computing, Forschungzentrum Jülich, Jülich, 52425, Germany)

07 February 2019

Abstract: 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 200% 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.


Published in: Physics letters B (2019)
Published by: Elsevier
DOI: 10.1016/j.physletb.2019.02.004
License: CC-BY-3.0



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