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HEP/Astro Seminar -- Wednesday, 02 August 2000

R-parity violating supersymmetry in light of SuperKamiokande results

Asesh K. Datta, (Mehta Research Institute)


The constraints on an R-parity violating supersymmetry theory arising from the recent SuperKamiokande results on atmospheric neutrinos are studied, with special reference to a scenario with bilinear R-parity violating term. Considering both the fermionic and the scalar sectors, we find that a large area of the parameter space is allowed, in terms of both lepton-number violating entries in the superpotential and the soft R-violating terms in the scalar potential, and that no fine-tuning is required except for the fact that FCNC puts additional restrictions on the theory. It is also pointed out that such a scenario should lead to like-sign dimuons and ditaus with substantial rates at Fermilab Tevatron Run II in a form that separates them from standard model backgrounds and other signals of supersymmetry.

Further, with only trilinear R-parity violating terms in the superpotential, we show that lighter stop can lead to specific leptonic signals identical with those of the top quark even at Tevatron Run I. We note that the same thing can happen with only bilinear R-parity violating terms in the superpotential as well.

3:30pm, Smith Lab 4079

George T. Fleming ( gfleming@mps.ohio-state.edu ), last updated 02 August 2000.

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