BOUNDS ON DELTA-B=1 COUPLINGS IN THE SUPERSYMMETRIC STANDARD MODEL

The most general supersymmetric model contains baryon number violating terms of the form A(ijk) ($) over bar D-i ($) over bar D-j ($) over b ar U-k in the superpotential. We reconsider the bounds on these coupli ngs, assuming that lepton number conservation ensures proton stability . These operators can mediate n - ($) over bar n oscillations and doub le nucleon decay. We show that neutron oscillations do not, as previou sly claimed, constrain the lambda(dsu) coupling; they do provide a bou nd on the lambda(dbu) coupling, which we calculate. We find that the b est bound on lambda(dsu) arises from double nucleon decay into two kao ns; the calculation is discussed in detail. There are no published lim its on this process; experimenters are urged to examine this nuclear d ecay mode. Finally, the other couplings can be bounded by the requirem ent of perturbative unification.