2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/200699A leptogenesis scenario in a supersymmetric standard model extended with introducing right-handed neutrinos is reconsidered. Lepton asymmetry is produced in the condensate of a right-handed sneutrino via the Affleck-Dine mechanism. The LH_u direction develops large value due to a negative effective mass induced by the right-handed sneutrino condensate through the Yukawa coupling of the right-handed neutrino, even if the minimum during the inflation is fixed at the origin. The lepton asymmetry is nonperturbatively transfered to the LH_u direction by this Yukawa coupling.19 pages, 3 figures. Revised version for publication. The model was modified to fix some problemsHigh Energy Physics - Phenomenologytext