BARYON-BARYON INTERACTION IN A QUARK-MODEL

Scattering observables of the NN and YN interactions and nuclear-matte r properties are investigated in a recent quark model developed for a unified description of the NN and YN systems. The model is formulated in the (3q)-(3q) resonating-group method, and incorporates the full Fe rmi-Breit interaction with explicit quark-mass dependence and the mini mum meson-exchange potentials of scalar and pseudo-scalar meson nonets directly coupled to quarks. Reasonable agreement with the available e xperimental data is obtained for the NN properties and the low-energy YN cross sections. Predictions for the Sigma(+)p and Lambda p scatteri ng observables at intermediate energies are very much model-dependent, suggesting the importance of further experimental studies of these qu antities.