Polyakov loop, diquarks and the two-flavour phase diagram

Details Polyakov loop, diquarks and the two-flavour phase diagram Polyakov loop, diquarks and the two-flavour phase diagram

2006-09-27

arxiv.org/abs/hep-ph/0609281v2

Phys.Rev.D75:034007,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 7 figures Discussion in section 2 has been extended. Legend of Fig. 7 has been corrected. Typographic errors have be

Scientific paper

10.1103/PhysRevD.75.034007

An updated version of the PNJL model is used to study the thermodynamics of N_f = 2 quark flavors interacting through chiral four-point couplings and propagating in a homogeneous Polyakov loop background. Previous PNJL calculations are extended by introducing explicit diquark degrees of freedom and an improved effective potential for the Polyakov loop field. The input is fixed exclusively by selected pure-gauge lattice QCD results and by pion properties in vacuum. The resulting (T, \mu) phase diagram is studied with special emphasis on the critical point, its dependence on the quark mass and on Polyakov loop dynamics. We present successful comparisons with lattice QCD thermodynamics expanded to finite chemical potential \mu.

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