Entropy production and reheating at the chiral phase transition

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.

arXiv comment7 pages, 5 figures

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Cited by in corpus (13)

• Hydro+ in Action: Understanding the Out-of-Equilibrium Dynamics Near a Critical Point in the QCD Phase Diagram
• Fluctuation dynamics near the QCD critical point
• Unsupervised Outlier Detection in Heavy-Ion Collisions
• Modeling the diffusive dynamics of critical fluctuations near the QCD critical point
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• Entropy Production in Dissipationless Hydrodynamics with an order parameter