# Leptogenesis after superconformal subcritical hybrid inflation

## TL;DR

This paper extends a superconformal hybrid inflation model by adding right-handed neutrinos, enabling leptogenesis through sneutrino decay without conflicting with neutrino oscillation data.

## Contribution

It introduces a novel inflationary scenario with right-handed neutrinos that allows leptogenesis independent of neutrino oscillation constraints.

## Key findings

- Reheating is achieved via sneutrino decay.
- Unconventional neutrino mass patterns are generated.
- Leptogenesis is successfully realized in the model.

## Abstract

We consider an extended version of superconformal subcritical hybrid inflation model by introducing three right-handed neutrinos that have the Majorana mass terms. In the model one of the right-handed sneutrinos plays a role of the inflaton field, and it decays to reheat the universe after inflation. The vacuum expectation value for the waterfall field gives an unconventional pattern of the light neutrino mass matrix, and the neutrino Yukawa couplings that determine the reheating temperature are not constrained by the neutrino oscillation data. Consequently thermal leptogenesis or sneutrino leptogenesis is realized.