2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/177702We discuss the one-loop electroweak renormalization of the leptonic mixing matrix in the case of Majorana neutrinos, and establish its relationship with the renormalization group evolution of the dimension five operator responsible for the light Majorana neutrino masses. We compare our results in the effective theory with those in the full seesaw theory.28 pages. With axodrawHigh Energy Physics - Phenomenologytext