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arXiv · 1908.05939

Polyakov linear-sigma model in mean-field approximation and optimized perturbation theory

Abdel Nasser Tawfik·Carsten Greiner·Abdel Magied Diab·M. T. Ghoneim·H. Anwer
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Abstract

We compare results from the Polyakov linear-sigma model (PLSM) in optimized perturbation theory (OPT) with the mean-field approximation (MFA). At finite temperatures and chemical potentials, the chiral condensates and the decofinement order parameters, the thermodynamic pressure, the pseudo-critical temperatures, the subtracted condensates, the second- and high-order moments of various conserved charges (cumulants) obtained in MFA are compared with OPT and also confronted to available lattice QCD simulations. We conclude that when moving from lower- to higher-order moments of various quantum charges, OPT becomes more closer to QCD.

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Abdel Nasser Tawfik, Carsten Greiner, Abdel Magied Diab, M. T. Ghoneim, H. Anwer. 2019-08-16. Polyakov linear-sigma model in mean-field approximation and optimized perturbation theory. https://doi.org/10.1103/physrevc.101.035210

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