Phase transition and thermodynamics of a hot and dense system in a scaled NJL model

Abstract

The chiral phase transition of a hot and dense system of quarks is studied within a modified SU(3) NJL lagrangian that implements the QCD scale anomaly. The u- and s-quark condensates can feel or not the same chiral restoration depending on the considered region of the 3-dimension space T_c(μ_uc,μ_sc). The temperature behaviour of the pressure and of the energy and entropy densities of the u- and s-quark system is investigated. At high temperature, the non-vanishing bare s-quark mass only modifies slightly the usual behaviour associated with an ideal quark gas.

23 pages, LaTeX, uses elsart.sty. This version of the paper includes the figures (ps)

References in corpus (1)

• QCD Phenomenology based on a Chiral Effective Lagrangian

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