Matter-Antimatter Asymmetry from Dirac-Majorana Flip-Flop
This research proposes a novel leptogenesis mechanism called a 'Dirac-Majorana flip-flop' to explain the matter-antimatter asymmetry. It suggests lepton number violation happens at high temperatures via a scalar field, generating asymmetry through heavy neutrinos. The system then transitions back to pure Dirac neutrinos at low temperatures, potentially leaving observable gravitational waves and dark radiation in the CMB.