Unification of gauge couplings and the tau neutrino mass in Supergravity without R – parity

Abstract

Minimal R–parity violating supergravity predicts a value for αs(MZ) smaller than in the case with conserved the R–parity, and therefore closer to the experimental world average. We show that the R–parity violating effect on the αs prediction comes from the larger two-loop b-quark Yukawa contribution to the renormalization group evolution of the gauge… (More)

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