Effects of mesonic correlations in the QCD phase transition
Loading...
Date
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
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.
11 pages, 4 figures; version accepted for publication in Yad. Fiz., text extended, 1 figure added
11 pages, 4 figures; version accepted for publication in Yad. Fiz., text extended, 1 figure added