2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/199937We propose an extension of the standard model, in which neutrinos are Dirac particles and their tiny masses originate from a one-loop radiative diagram. The new fields required by the neutrino mass-generation also accommodate the explanation for the matter-antimatter asymmetry and dark matter in the universe.4 pages, 3 figures. Revised version with improved model. Accepted by PRDHigh Energy Physics - Phenomenologytext