2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/214937We examined Z\ell^+\ell^- and Zb\bar b couplings in the minimal supersymmetric model (MSSM) with explicit R-parity violating interactions. We found the top quark L-violating couplings λ'_{i3k} and B-violating couplings λ''_{3j3} could give significant contributions through the top quark loops. To accomadate the latest R_{\ell} data, λ'_{i3k} are suject to stringent bounds, some of which can be much stronger than the current bounds. Within the current perturbative unitarity bound of 1.25 for λ''_{3j3}, the R_b value in R-violating MSSM agrees well with the experimental data at $2σ$ level, but may lie outside the 1σrange depending on the involved sfermion mass.results updatedHigh Energy Physics - Phenomenologytext