# Symmetry restoration due to preheating and lepton number asymmetry

## TL;DR

This paper explores how symmetry restoration during preheating can influence leptogenesis, focusing on radiative effects from particle production and their impact on neutrino mass models.

## Contribution

It introduces a novel scenario where symmetry restoration affects leptogenesis via radiative effects in a one-loop neutrino mass model with singlet scalars.

## Key findings

- Symmetry restoration occurs due to explosive particle production in preheating.
- Lepton asymmetry is generated through inflaton decay into right-handed neutrinos.
- The model demonstrates a viable mechanism for leptogenesis influenced by radiative effects.

## Abstract

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.