The Phase Structure of the Polyakov--Quark-Meson Model

Details The Phase Structure of the Polyakov--Quark-Meson Model The Phase Structure of the Polyakov--Quark-Meson Model

2007-04-24

arxiv.org/abs/0704.3234v2

Phys.Rev.D76:074023,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 12 figures, RevTex4; discussion of mu-dependence extended, references added, version to be published in PRD

Scientific paper

10.1103/PhysRevD.76.074023

The relation between the deconfinement and chiral phase transition is explored in the framework of an Polyakov-loop-extended two-flavor quark-meson (PQM) model. In this model the Polyakov loop dynamics is represented by a background temporal gauge field which also couples to the quarks. As a novelty an explicit quark chemical potential and N_f-dependence in the Polyakov loop potential is proposed by using renormalization group arguments. The behavior of the Polyakov loop as well as the chiral condensate as function of temperature and quark chemical potential is obtained by minimizing the grand canonical thermodynamic potential of the system. The effect of the Polyakov loop dynamics on the chiral phase diagram and on several thermodynamic bulk quantities is presented.

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