Effects of mesonic correlations in the QCD phase transition

Details Effects of mesonic correlations in the QCD phase transition Effects of mesonic correlations in the QCD phase transition

2007-05-03

arxiv.org/abs/0705.0384v3

Yad.Fiz.71:2012-2018,2008; Phys.Atom.Nucl.71:1981-1987,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 4 figures; version accepted for publication in Yad. Fiz., text extended, 1 figure added

Scientific paper

10.1134/S1063778808110161

The finite temperature phase transition of strongly interacting matter is studied within a nonlocal chiral quark model of the NJL type coupled to a Polyakov loop. In contrast to previous investigations which were restricted to the mean-field approximation, mesonic correlations are included by evaluating the quark-antiquark ring sum. For physical pion masses, we find that the pions dominate the pressure below the phase transition, whereas above T_c the pressure is well described by the mean-field approximation result. For large pion masses, as realized in lattice simulations, the meson effects are suppressed.

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