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

2009-06-12Journal article Open access
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dc.contributor.authorCosta, P.
dc.contributor.authorRuivo, M.C.
dc.contributor.authorSousa, C. A. de
dc.contributor.authorHansen, H.
dc.contributor.authorAlberico, W.M.
dc.contributor.authorCosta, Pedro
dc.date.accessioned2025-04-30T09:53:19Z
dc.date.available2025-04-30T09:53:19Z
dc.date.issued2009-06-12
dc.descriptionArticle number 116003
dc.description.abstractThe 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.eng
dc.description.sponsorshipWork supported by Grant No. SFRH/BPD/23252/2005 (P. Costa) and by F.C.T. under Project Nos. POCI/FP/63945/2005 and POCI/FP/81936/2007 (H. Hansen). This work was done in spite of the lack of support from Ministry of University and Research of Italy and France.
dc.identifier.citationP. 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.
dc.identifier.doi10.1103/physrevd.79.116003
dc.identifier.eissn1550-2368
dc.identifier.issn1550-7998
dc.identifier.urihttp://hdl.handle.net/10400.8/12838
dc.language.isoeng
dc.peerreviewedyes
dc.publisherAmerican Physical Society
dc.relationSFRH/BPD/23252/2005
dc.relationPOCI/FP/63945/2005
dc.relationPOCI/FP/81936/2007
dc.relation.hasversionhttps://inspirehep.net/literature/790668
dc.relation.ispartofPhysical Review D
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectPNJL model
dc.subjectRestoration of chiral symmetry
dc.subjectChiral partners
dc.titleScalar-pseudoscalar meson behavior and restoration of symmetries in SU(3) Polyakov–Nambu–Jona-Lasinio modeleng
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage23
oaire.citation.issue11
oaire.citation.startPage1
oaire.citation.titlePhysical Review D (particles, fields, gravitation, and cosmology)
oaire.citation.volume79
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameCosta
person.givenNamePedro
person.identifier.ciencia-id5916-434C-C367
person.identifier.orcid0000-0003-4809-6542
person.identifier.scopus-author-id26642948700
relation.isAuthorOfPublication6c1e3356-f60b-47f5-9efc-6b69569b5581
relation.isAuthorOfPublication.latestForDiscovery6c1e3356-f60b-47f5-9efc-6b69569b5581

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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.
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