Leptogenesis with an almost conserved lepton number
Leptogenesis with an almost conserved lepton number
Seesaw models with a slightly broken lepton number symmetry can explain small neutrino masses, and allow for low-scale leptogenesis. We make a thorough analysis of leptogenesis within the simplest model with two right-handed (RH) neutrinos (or with ${N}_{3}$ decoupled). We obtain a semianalytical formula for the final asymmetry in both …