In-medium {omega} meson mass and quark condensate in a Nambu-Jona-Lasinio model constrained by recent experimental data

Journal Article · Sun Apr 15 04:00:00 EDT 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.75.048201· OSTI ID:20995250

Huguet, R; Caillon, J C; Labarsouque, J ^[1]

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1. Universite Bordeaux 1, CNRS/IN2P3, Centre d'Etudes Nucleaires de Bordeaux-Gradignan, UMR 5797 Chemin du Solarium, BP120, 33175 Gradignan (France)

We have determined the relation between the in-medium {omega} meson mass and quark condensate in the framework of a Nambu-Jona-Lasinio model constrained by some recent experimental data on the meson properties in nuclei. In addition to the usual four-quark interactions, we have included eight-quark terms in the Lagrangian. The parameters of this model have been determined using the meson properties in the vacuum as well as in the medium. More particularly, we have constrained both the in-medium pion decay constant to the value measured in experiments on deeply bound pionic atoms and the in-medium {omega} meson mass to the experimental value obtained either by the TAPS collaboration or by the E325 experiment at KEK Proton Synchrotron. Our results are compared to several scaling laws and in particular to that of G. E. Brown and M. Rho [(Phys. Rep. 398, 301 (2004)].

• OSTI ID: 20995250
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 4 Vol. 75; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BAG MODEL
COLOR MODEL
DECAY
INTERACTIONS
JAPANESE ORGANIZATIONS
LAGRANGIAN FUNCTION
MASS
NUCLEAR MATTER
NUCLEI
OMEGA BARYONS
PIONIC ATOMS
PIONS
PROTONS
QUARK CONDENSATION
QUARKS
SYNCHROTRONS