Lepton number asymmetry via inflaton decay in a modified radiative seesaw model

Understand

We propose a non-thermal scenario for the generation of baryon number asymmetry in a radiative neutrino mass model which is modified to realize inflation at the early Universe.

• In this scenario, inflaton plays a crucial role in both generation of neutrino masses and lepton number asymmetry.
• Lepton number asymmetry is firstly generated in the dark matter sector through direct decay of inflaton.
• It is transferred to the lepton sector via the dark matter annihilation and then converted to the baryon number asymmetry due to the sphaleron interaction.