Bounds on ΔB = 1 couplings in the supersymmetric standard model

The most general supersymmetric model contains baryon number violating terms of the form {lambda}{sub ijk} {bar D}{sub i}{bar D}{sub j}{bar U}{sub k} in the superpotential. The authors reconsider the bounds on these couplings, assuming that lepton number conservation ensures proton stability. These operators can mediate n-{anti n} oscillations and double nucleon decay. They show that neutron oscillations do not, as previously claimed, constrain the {lambda}{sub dsu} coupling; they do provide a bound on the {lambda}{sub dbu} coupling, which they calculate. They find that the best bound on {lambda}{sub dsu} arises from double nucleon decay into two kaons; the calculation is discussed in detail. There are no published limits on this process; experimenters are urged to examine this nuclear decay mode. Finally, the other couplings can be bounded by the requirement of perturbative unification.