Repulsive core ofNNS-wave scattering in a quark model with a condensed vacuum

Abstract

We work in a chiral invariant quark model, with a condensed vacuum, characterized by only one parameter. Bound state equations for the nucleon and {Delta} are solved in order to obtain an updated value of their radii and masses. Nucleon-nucleon S-wave scattering is studied in the resonating group method framework both for isospin T=1 and T=0. The phase shifts are calculated and an equivalent local potential, which is consistent with K-N scattering, is derived. The result is a reasonable microscopic short range repulsion in the nucleon-nucleon interaction. {copyright} {ital 1997} {ital The American Physical Society}