Thermodynamic properties of a simple, confining model

Details Thermodynamic properties of a simple, confining model Thermodynamic properties of a simple, confining model

1997-06-25

arxiv.org/abs/nucl-th/9706070v1

Phys.Lett.B425:232-238,1998

Physics

Nuclear Physics

Nuclear Theory

11 pages, LaTeX, epsfig.sty, elsart.sty

Scientific paper

10.1016/S0370-2693(98)00229-9

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 $\mu=0$, 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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