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QCD equation of state at vanishing and high baryon density: Chiral Mean Field model

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arxiv 2002.01217 v1 pith:5WCRYJ2X submitted 2020-02-04 hep-ph astro-ph.HEnucl-th

Anton Motornenko , Jan Steinheimer , Volodymyr Vovchenko , Stefan Schramm , Horst Stoecker This is my paper · ORCID
classification hep-phastro-ph.HEnucl-th
keywords densityhighmodelpressurebaryonbehaviorchiraldiscussed
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abstract

The thermodynamic properties of high temperature and high density QCD-matter are studied using the Chiral SU(3)-flavor parity-doublet Polyakov-loop quark-hadron mean-field model, CMF. The CMF model provides a proper description of lattice QCD data, heavy-ions physics, and static neutron stars. The behavior of lines of constant pressure with increase of baryon density is discussed. The rapid change of pressure behavior at $\mu_B/T\approx3$ suggests a strong contribution of baryons to thermodynamic properties at this region. The position of this region is very close to the radius of convergence for a Taylor expansion of the QCD pressure. The role of mesons and unstable hadrons in the hydrodynamic expansion of strongly interacting matter is also discussed.

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  1. Hadronic and partonic composition of QCD matter across the crossover

    nucl-th 2026-07 conditional novelty 5.0 of 10

    A three-parameter hadron–quark crossover equation of state fitted to lattice QCD data yields a switching temperature T₀ ≃ 216 MeV, implying hadronic degrees of freedom persist well above the chiral pseudocritical temperature.

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