Skip to Main content Skip to Navigation
Journal articles

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

Abstract : We 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.
Document type :
Journal articles
Complete list of metadatas

http://hal.in2p3.fr/in2p3-00449379
Contributor : Hubert Hansen <>
Submitted on : Thursday, January 21, 2010 - 2:27:13 PM
Last modification on : Saturday, June 20, 2020 - 4:18:04 PM

Links full text

Identifiers

Collections

Citation

H. Hansen, W.M. Alberico, A. Beraudo, A. Molinari, M. Nardi, et al.. Mesonic correlation functions at finite temperature and density in the Nambu-Jona-Lasinio model with a Polyakov loop. Physical Review D, American Physical Society, 2007, 75, pp.065004. ⟨10.1103/PhysRevD.75.065004⟩. ⟨in2p3-00449379⟩

Share

Metrics

Record views

212