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

Journal Article · Mon Jun 01 04:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.116003· OSTI ID:21300899

Costa, P; Ruivo, M C; Sousa, C A. de; Hansen, H; Alberico, W M ^[1]

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1. Departamento de Fisica, Universidade de Coimbra, P-3004-516 Coimbra (Portugal) and E.S.T.G., Instituto Politecnico de Leiria, Morro do Lena-Alto do Vieiro, 2411-901 Leiria (Portugal)

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/T{sub c}{approx_equal}1.0.

• OSTI ID: 21300899
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 79; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AXIAL SYMMETRY
CHIRAL SYMMETRY
CHIRALITY
COUPLING CONSTANTS
MODIFICATIONS
PSEUDOSCALAR MESONS
QUARKS
SCALAR MESONS
SIMULATION
SU-3 GROUPS