Abstract
The most general supersymmetric model contains baryon number violating terms of the form λ ijk , D i D j U k in the superpotential. We reconsider the bounds on these couplings, assuming that lepton number conservation ensures proton stability. These operators can mediate n - n oscillations and double nucleon decay. We show that neutron oscillations do not, as previously claimed, constrain the λ dsu coupling; they do provide a bound on the λ dbu coupling, which we calculate. We find that the best bound on λ 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.
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