MINIMAL SUPERGRAVITY WITH R-PARITY BREAKING

We show that the minimal R-parity breaking model characterized by an e ffective bilinear violation of R-parity in the superpotential is consi stent with minimal N = 1 supergravity unification with radiative break ing of the electroweak symmetry and universal scalar and gaugino masse s. This one-parameter extension of the MSSM-SUGRA model provides there fore the simplest reference model for the breaking of R-parity and con stitutes a consistent truncation of the complete dynamical models with spontaneous R-parity breaking proposed previously. We comment on the lowest-lying CP-even Higgs boson mass and discuss its minimal N = 1 su pergravity limit, determine the ranges of tan beta and bottom quark Yu kawa couplings allowed in the model, as well as the relation between t he tau neutrino mass and the bilinear R-parity violating parameter. (C ) 1998 Elsevier Science B.V.