2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39965We discuss a supersymmetric extension of the standard model with an extra U(1) gauge symmetry. In this model, the proton stability is guaranteed by the gauge symmetry without invoking R parity. The gauge symmetry breakdown automatically generates an effective $μ$ term and large Majorana masses for right-handed neutrinos. The supersymmetry-soft-breaking terms for scalar fields could be universal at a very high energy scale, and the electroweak symmetry is broken through radiative corrections.3 pages, To be published in the Proc. of ICHEP2000 Osaka JapanHigh Energy Physics - Phenomenologytext