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Non-equilibrium cumulants within model A from crossover to first-order phase transition side

We study the non-equilibrium cumulants of the chiral order parameter field ( σ field) in different phase transition scenarios via Langevin dynamics. Cumulants up to fourth-order have been calculated based on the spacetime-dependent σ configurations from the event-by-event numerical simulations. By l...

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Bibliographic Details
Published in:The European physical journal. A, Hadrons and nuclei Hadrons and nuclei, 2023-02, Vol.59 (2), Article 30
Main Authors: Jiang, Lijia, Chao, Jingyi
Format: Article
Language:English
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Summary:We study the non-equilibrium cumulants of the chiral order parameter field ( σ field) in different phase transition scenarios via Langevin dynamics. Cumulants up to fourth-order have been calculated based on the spacetime-dependent σ configurations from the event-by-event numerical simulations. By limiting the cooling of the system in a Hubble-like way, the out-of-equilibrium cumulants illustrate clear memory effects during the evolution. Both the signs and the magnitudes of the high-order cumulants differ from the equilibrium ones below the phase transition temperature. Especially, the dynamical cumulants grow more intensively from the first-order phase transition side than they do from the crossover side. In addition, analysis of the high-order off-equilibrium cumulants on the hypothetical freeze-out lines present non-monotonic curves in the large chemical potential region.
ISSN:1434-601X
1434-601X
DOI:10.1140/epja/s10050-023-00949-1