Testing quasi-Dirac leptogenesis through neutrino oscillations

The lightness of the Standard Model (SM) neutrinos could be understood if their masses were to generated by new physics at a high scale, through so-called seesaw mechanism involving heavy fermion singlets. We consider novel scenario where violates baryon minus lepton number only small amount resulting in both singlets and SM split into pairs quasi-Dirac states. Above weak cosmic matter-antimatter asymmetry can resonant leptogenesis from decay Nontrivially, CP violation for is bounded above light neutrino mass splitting which probed oscillation experiments.