QUARK PAULI EFFECTS IN THE NONSTRANGE 2 BARYON SYSTEMS

By using a chiral quark cluster model for a system of two nonstrange b aryons, we analyze the consequences of the symmetry requirements from the underlying quark structure. Quark Pauli and dynamical correlations are studied putting the emphasis in the different repulsive mechanism s implied in the NN (nucleon-nucleon) and Delta Delta systems. We find an alternative explanation for the short-range repulsion in the NN sy stem, up to now attributed to the one-gluon exchange potential. A Delt a Delta interaction, derived from a basic quark-quark potential fitted to the NN sector, is studied in detail.