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New LEP constraints on some supersymmetric Yukawa interactions that violate R-parity

Gautam Bhattacharyya, John Ellis, K. Sridhar

hep-pharXiv:hep-ph/9503264

Abstract

We consider one-loop corrections to partial widths of the Z induced by supersymmetric Yukawa interactions that violate R-parity. The precise experimental values of the leptonic Z partial widths bound these Yukawa couplings, with the most interesting constraints being those on couplings involving the τ, since previous constraints on them were very mild.

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