  In some models, exotic baryons with strangeness and anticharm or antibeauty
should exist and even be stable against strong decay. We consider the stability
of such possible exotic baryons, which in the constituent quark picture are
called pentaquarks (each is composed of four quarks and an antiquark). Our
model is based on diquark clustering and supersymmetry in hadrons, and assumes
that the spin-dependent force between quarks arises from one-gluon exchange. In
the model, a pentaquark with strangeness and anticharm can decay strongly, but
an analogous pentaquark with an antibeauty quark is stable except for weak
decay.
