Mesonic correlation functions at finite temperature and density in the Nambu-Jona-Lasinio model with a Polyakov loop

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dc.creatorHansen, H.
dc.creatorAlberico, W. M.
dc.creatorBeraudo, A.
dc.creatorMolinari, A.
dc.creatorNardi, M.
dc.creatorRatti, C.
dc.date2006-09-12
dc.date2007-01-29
dc.date.accessioned2026-07-07T10:25:25Z
dc.date.available2026-07-07T10:25:25Z
dc.descriptionWe investigate the properties of scalar and pseudo-scalar mesons at finite temperature and quark chemical potential in the framework of the Nambu-Jona-Lasinio (NJL) model coupled to the Polyakov loop (PNJL model) with the aim of taking into account features of both chiral symmetry breaking and deconfinement. The mesonic correlators are obtained by solving the Schwinger-Dyson equation in the RPA approximation with the Hartree (mean field) quark propagator at finite temperature and density. In the phase of broken chiral symmetry a narrower width for the sigma meson is obtained with respect to the NJL case; on the other hand, the pion still behaves as a Goldstone boson. When chiral symmetry is restored, the pion and sigma spectral functions tend to merge. The Mott temperature for the pion is also computed.
dc.description24 pages, 9 figures, version to appear in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/hep-ph/0609116
dc.identifierhttp://arxiv.org/abs/hep-ph/0609116
dc.identifierPhys.Rev.D75:065004,2007
dc.identifierdoi:10.1103/PhysRevD.75.065004
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/176537
dc.subjectHigh Energy Physics - Phenomenology
dc.titleMesonic correlation functions at finite temperature and density in the Nambu-Jona-Lasinio model with a Polyakov loop
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