Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-11-29
Physics
High Energy Physics
High Energy Physics - Phenomenology
2 pages, postscript (uucompressed), to appear in the Proceedings of the International Europhysics Conference on High Energy Ph
Scientific paper
Electroweak precision data at LEP are used to place bounds on some $\lambda'$-type ($L$-violating) and $\lambda''$-type ($B$-violating) $R$-parity violating supersymmetric Yukawa couplings. We consider one-loop corrections (triangles and self-energies) induced by these couplings to the $Z$-partial widths. The couplings involving the top quark induce stronger loop effects and hence are more strongly constrained than others. On the other hand, information on $D$- and $\tau$-decays are used to constrain some of the $\lambda'$-type couplings which are complementary to the ones constrained from LEP. Among the bounds we have derived, many are new from a phenomenological view-point.
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