Coupling of pion condensate, chiral condensate and Polyakov loop in an extended NJL model

Details Coupling of pion condensate, chiral condensate and Polyakov loop in an extended NJL model Coupling of pion condensate, chiral condensate and Polyakov loop in an extended NJL model

2006-10-18

arxiv.org/abs/hep-ph/0610221v3

Phys.Rev.C75:064910,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

15pages, 8 figures

Scientific paper

10.1103/PhysRevC.75.064910

The Nambu Jona-Lasinio model with a Polyakov loop is extended to finite isospin chemical potential case, which is characterized by simultaneous coupling of pion condensate, chiral condensate and Polyakov loop. The pion condensate, chiral condensate and the Polyakov loop as functions of temperature and isospin chemical potential are investigated by minimizing the thermodynamic potential of the system. The resulting $(T,\mu_I)$ phase diagram is studied with emphasis on the critical point and Polyakov loop dynamics. The tricritical point for the pion superfluidity phase transition is confirmed and the phase transition for isospin symmetry restoration in high isospin chemical potential region perfectly coincides with the crossover phase transition for Polyakov loop. These results are in agreement with the Lattice QCD data.

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