Parton distributions for the octet and decuplet baryons

We calculate the parton distributions for both polarized and unpolarized octet and decuplet baryons, using the ha bag, dressed by mesons. We show that the hyperfine interaction responsible for the Delta-N and Sigma(0)-Lambda splittings leads to large deviations from SU(3) and SU(6) predictions. For the Lambda we find significant polarized, non-strange parton distributions which lead to a sizable Lambda polarization in polarized, semi-inclusive pp scattering. We also discuss the flavor symmetry violation arising from the meson cloud associated with the chiral structure of baryons. [S0556-2821(99)06417-6].