ON THE FLAVOR STRUCTURE OF THE CONSTITUENT QUARK

We discuss the dressing of constituent quarks with a pseudoscalar meso n cloud within the effective chiral quark model. SU(3)(f) symmetry bre aking effects are included explicitly. Our results are compared with t hose of the traditional meson cloud approach in which pions are couple d to the nucleon. The pionic dressing of the constituent quarks explai ns the experimentally observed violation of the Gottfried sum rule and leads to an enhanced nonperturbative sea of q (q) over bar pairs in t he constituent quark and consequently in the nucleon. We find 2.5 time s more pions and 10-15 times more kaons in the nucleon than in the tra ditional picture. The (d) over bar-(u) over bar asymmetry obtained her e is concentrated at somewhat smaller x and the (u) over bar/(d) over bar ratio is somewhat different than in the traditional meson cloud mo del of the nucleon.