2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/43584We consider a generic model with four gauge singlets which generates successfully the right amount of baryon asymmetry through leptogenesis at the TeV scale. It also reproduces left-handed neutrino masses compatible with present data. In the present work, we perform a study of thermal production mechanisms of the lightest right-handed neutrino $N_{1}$ responsible for the lepton asymmetry taking into account all dominant processes (decays, $ΔL = 1$ and $ΔL=2$ scatterings) by solving the full Boltzmann equations.6 pages, 2 eps figures, moriond.styHigh Energy Physics - Phenomenologytext