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Thermodynamic properties of a simple, confining model

D. Blaschke·C. D. Roberts·S. Schmidt
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Abstract

We study the equilibrium thermodynamics of a simple, confining, DSE-model of 2-flavour QCD at finite temperature and chemical potential. The model has two phases: one characterised by confinement and dynamical chiral symmetry breaking; and the other by their absence. The phase boundary is defined by the zero of the vacuum-pressure difference between the confined and deconfined phases. Chiral symmetry restoration and deconfinement are coincident with the transition being of first order, except for $μ=0$, where it is second order. Nonperturbative modifications of the dressed-quark propagator persist into the deconfined domain and lead to a dispersion law modified by a dynamically-generated, momentum-dependent mass-scale. This entails that the Stefan-Boltzmann limit for the bulk thermodynamic quantities is attained only for large values of temperature and chemical potential.

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D. Blaschke, C. D. Roberts, S. Schmidt. 1997-06-25. Thermodynamic properties of a simple, confining model. https://doi.org/10.1016/s0370-2693(98)00229-9

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