2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/201315We consider an extended supersymmetric SO(10) seesaw model with only doublet Higgs scalars, in which neutrino masses are suppressed by the scale of D-parity violation. Leptogenesis can occur at the TeV scale through the decay of a singlet Sigma, thereby avoiding the gravitino crisis. Washout of the asymmetry can be effectively suppressed by the absence of direct couplings of Sigma to leptons.4 pages, 5 figuresHigh Energy Physics - Phenomenologytext