Scalar-pseudoscalar meson behavior and restoration of symmetries in SU(3) PNJL model

Details Scalar-pseudoscalar meson behavior and restoration of symmetries in SU(3) PNJL model Scalar-pseudoscalar meson behavior and restoration of symmetries in SU(3) PNJL model

2008-07-14

arxiv.org/abs/0807.2134v3

Phys.Rev. D79 (2009) 116003

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, 5 figures, PRD version

Scientific paper

10.1103/PhysRevD.79.116003

The modification of mesonic observables in a hot medium is analyzed as a tool to investigate the restoration of chiral and axial symmetries in the context of the Polyakov-loop extended Nambu--Jona-Lasinio model. The results of the extended model lead to the conclusion that the effects of the Polyakov loop are fundamental for reproducing lattice findings. In particular, the partial restoration of the chiral symmetry is faster in the PNJL model than in the NJL one, and it is responsible for several effects: the meson-quark coupling constants show a remarkable difference in both models, there is a faster tendency to recover the Okubo-Zweig-Iizuka rule, and finally the topological susceptibility nicely reproduces the lattice results around $T/T_c\approx 1.0$.

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