ARE THERE QUASI-STABLE STRANGE BARYONS WITH ANTICHARM OR ANTIBEAUTY

In some models, exotic baryons with strangeness and anticharm or antib eauty should exist and even be stable against strong decay. We conside r the stability of such possible exotic baryons, which in the constitu ent quark picture are called pentaquarks (each is composed of four qua rks and an antiquark). Our model is based on diquark clustering and su persymmetry in hadrons, and assumes that the spin-dependent force betw een quarks arises from one-gluon exchange. In the model, a pentaquark with strangeness and anticharm can decay strongly, but an analogous pe ntaquark with an antibeauty quark is stable except for weak decay.