2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/175431We discuss in detail a five-dimensional Minimal Supersymmetric Standard Model compactified on $S^1/Z_2$ extended by the effective Majorana neutrino mass operator. We study the evolution of neutrino masses and mixings. Masses and angles, in particular the atmospheric mixing angle $θ_{23}$, can be significantly lowered at high energies with respect to their value at low energy.23 pages, 13 figuresHigh Energy Physics - PhenomenologyHigh Energy Physics - Theorytext