Neutrino Masses, Baryogenesis and Bilinear R-parity Violation

A. G. Akeroyd, E. J. Chun, M. A. Diaz, D. -W. Jung

Published 2003-07-31Version 1

We consider the impact of cosmological $B-L$ constraints on supersymmetric standard models with bilinear breaking of R-parity. In order to avoid erasing any primordial baryon or lepton asymmetry above the electroweak scale, $B-L$ violation for at least one generation should be sufficiently small. Working in the context of models with non--universal soft supersymmetry breaking masses, we show how the above cosmological constraint can be satisfied while simultaneously providing a neutrino mass matrix required by current data.