Eur. Phys. J. A 12, 91-101 (2001)
Hadronic decays of N and
resonances
in a chiral quark model
L. Theußl1, R.F. Wagenbrunn2, B. Desplanques1 and W. Plessas3
1 Institut des Sciences Nucléaires (Unité Mixte de Recherche CNRS-IN2P3, UJF) F-38026 Grenoble Cedex, France
2 Dipartimento di Fisica Nucleare e Teorica, Università di Pavia and INFN, Pavia 27100, Italy
3 Institut für Theoretische Physik, Universität Graz, Universitätsplatz 5, A-8010 Graz, Austria
lukas@isn.in2p3.fr
(Received: 11 May 2001 / Revised version: 3 July 2001 Communicated by P. Schuck)
Abstract
and
decay modes of light baryon resonances are
investigated within a chiral quark model whose hyperfine interaction
is based on Goldstone-boson exchange. For the decay mechanism a
modified version of the 3P0 model is employed. Our primary aim is
to provide a further test of the recently proposed
Goldstone-boson exchange constituent quark model. We compare the
predictions for
and
decay widths with experiment and also
with results from a traditional one-gluon exchange constituent quark
model. The differences between nonrelativistic and semirelativistic
versions of the constituent quark models are outlined. We also discuss
the sensitivity of the results on the parameterization of the meson
wave function entering the 3P0 model.
12.39.Pn - Potential models.
13.30.Eg - Hadronic decays.
14.20.Gk - Baryon resonances with S=0 .
© Società Italiana di Fisica, Springer-Verlag 2001