Testing quasi-Dirac leptogenesis through neutrino oscillations

Testing quasi-Dirac leptogenesis through neutrino oscillations

Blog Article

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