Scalar-pseudoscalar meson behavior and restoration of symmetries in SU(3) Polyakov–Nambu–Jona-Lasinio model

Costa, P.; Ruivo, M.C.; Sousa, C. A. de; Hansen, H.; Alberico, W.M.; Costa, Pedro

http://hdl.handle.net/10400.8/12838

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Scalar-pseudoscalar meson behavior and restoration of symmetries in SU(3) Polyakov-Nambu-Jona-Lasinio model.pdf	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 Polyakov-Nambu-Jona-Lasinio model than in the Nambu-Jona-Lasinio 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/Tc 1.0.	406.62 KB	Adobe PDF	Download

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Abstract(s)

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 Polyakov-Nambu-Jona-Lasinio model than in the Nambu-Jona-Lasinio 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/Tc 1.0.

Description

Article number 116003

Keywords

PNJL model Restoration of chiral symmetry Chiral partners

URI

http://hdl.handle.net/10400.8/12838

Citation

P. Costa, M.C. Ruivo, C.A. de Sousa, H. Hansen and W.M. Alberico, "Scalar-pseudoscalar meson behavior and restoration of symmetries in SU(3) PNJL model,'' Phys. Rev. D \textbf{79} (2009), 116003 doi: https://doi.org/10.1103/PhysRevD.79.116003.