DOI: 10.1140/epjc/s2003-01197-1
The fuzzy bag and baryonic properties with center of mass and recoil corrections
F. PilottoInstituto de Física, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
(Received: 14 January 2003 / Published online: 5 May 2003 )
Abstract
The fuzzy bag is a hadronic model which has features both of
the bag model (energy-momentum conservation, QCD vacuum energy)
and of relativistic potential models (confinement achieved through
a potential). It is also a chiral model, with the unique property
that the pion field is suppressed in the interior of the bag
by means of a scalar potential, and yet chiral symmetry is preserved.
This scalar potential allows one to control how far the pion
field can
penetrate in the interior of the bag.
We calculate the masses of the fundamental baryon octet taking
into
account the center of mass, one-gluon exchange and one-pion exchange
corrections. We also calculate the nucleon axial charge, charge
radii
and magnetic moments including center of mass and recoil corrections.
The agreement with experiment is excellent, and the results indicate
that the pion field is suppressed only very close to
the center of the bag.
© Società Italiana di Fisica, Springer-Verlag 2003
