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Research examines symmetry restoration and lepton number asymmetry generated by inflaton decay dynamics.
We study a possible symmetry restoration due to the radiative effect of particles which are explosively produced in preheating after inflation. As its application, we consider a scenario for leptogenesis based on the lepton number asymmetry generated in the right-handed neutrino sector through the inflaton decay. The scenario is examined in a one-loop radiative neutrino mass model extended with singlet scalars.
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Suematsu et al. (2017) studied this question.
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