DOI: 10.1140/epja/i2002-10088-6
Baryonic masses based on the NJL model
W.M. Alberico1, F. Giacosa2, M. Nardi1 and C. Ratti11 Dipartimento di Fisica Teorica, Università di Torino and INFN, Sezione di Torino, Via P. Giuria 1, I-10125 Torino, Italy
2 Institut für Theoretische Physik, Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen, Germany
giacosa@tphys.physik.uni-tuebingen.de
(Received: 27 September 2002 / Published online: 4 February 2003)
Abstract
We employ the Nambu-Jona-Lasinio model to determine the vacuum pressure
on the quarks in a baryon and hence their density inside. Then we estimate
the baryonic masses by implementing the local density approximation for
the mean-field quark energies obtained in a uniform and isotropic system.
We obtain a fair agreement with the experimental masses.
14.20.-c Baryons (including antiparticles)
12.39.-x - Phenomenological quark models.
12.39.Ba - Bag model.
12.39.Fe - Chiral Lagrangians.
© Società Italiana di Fisica, Springer-Verlag 2003