2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/43912We derive the lepton number violating dimension-five and dimension-seven operators, relevant for neutrino mass generation, in the Minimal Supersymmetry Standard Model without R-parity (the $/R$MSSM) by using the effective Lagrangian method. We keep all the possible CP violating phases, and we establish the general relationship between the high-scale parameters and the low-energy observals associated with the Standard Model particles. We study in a specific model the dependence of neutrino masses on the CP phases.revtex, 28 pages, includes 10 ps figuresHigh Energy Physics - Phenomenologytext