Leptogenesis with a GeV-Scale Quasi-Dirac Neutrino
The model explores leptogenesis using a GeV-scale quasi-Dirac neutral lepton, showing that Higgs decay can generate the observed baryon asymmetry through thermal effects. This mechanism arises from spontaneous symmetry breaking and provides a viable parameter space accessible to future experiments like SHiP and FCC-ee. The framework also predicts observable gravitational waves.