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arXiv · 0705.0384

Effects of mesonic correlations in the QCD phase transition

D. Blaschke·M. Buballa·A. E. Radzhabov·M. K. Volkov
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Abstract

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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D. Blaschke, M. Buballa, A. E. Radzhabov, M. K. Volkov. 2008-03-14. Effects of mesonic correlations in the QCD phase transition. https://doi.org/10.1134/s1063778808110161

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