Affleck-Dine leptogenesis in the radiative neutrino mass model

Understand

Radiative neutrino mass models have interesting features, which make it possible to relate neutrino masses to the existence of dark matter.

• However, the explanation of the baryon number asymmetry in the universe seems to be generally difficult as long as we suppose leptogenesis based on the decay of thermal right-handed neutrinos.
• Since right-handed neutrinos are assumed to have masses of O(1) TeV in these models, they are too small to generate the sufficient lepton number asymmetry.
• Here we consider Affleck-Dine leptogenesis in a radiative neutrino mass model by using a famous flat direction LH_u as an alternative possibility.