2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46068The cosmological baryon asymmetry can be explained by the nonperturbative electroweak reprocessing of a lepton asymmetry generated in the out-of-equilibrium decay of heavy right-handed Majorana neutrinos. We analyze this mechanism in detail in the framework of a SO(10)-subgroup. We take three right-handed neutrinos into account and discuss physical neutrino mass matrices.latex2e, 22 pages, 9 figures, uses epsfig, pstricks and pst-coilHigh Energy Physics - PhenomenologyAstrophysicstext