Bounds on $ΔB=1$ Couplings in the Supersymmetric Standard Model

Details Bounds on $ΔB=1$ Couplings in the Supersymmetric Standard Model Bounds on $ΔB=1$ Couplings in the Supersymmetric Standard Model

1995-03-30

arxiv.org/abs/hep-ph/9503472v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 3 pages, no figures. Talk given by MS at the Beyond the Standard Model IV Conference, 13-18 December, 1994, Lake Tahoe,

Scientific paper

10.1016/0370-2693(96)01076-3

The most general supersymmetric model contains baryon number violating terms of the form $\lm_{ijk}\ \ov{D}_i\ \ov{D}_j\ \ov{U}_k$ in the superpotential. We reconsider the bounds on these couplings, assuming that lepton number conservation ensures proton stability. These operators can mediate $n-\ov{n}$ oscillations and double nucleon decay. We show that neutron oscillations do not, as previously claimed, constrain the $\lm_{dsu}$ coupling; they do provide a bound on the $\lm_{dbu}$ coupling, which we calculate. We find that the best bound on $\lm_{dsu}$ arises from double nucleon decay into two kaons. 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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