# Spontaneous baryogenesis in spiral inflation

## TL;DR

This paper explores how spontaneous baryogenesis can occur during spiral inflation driven by the inflaton, analyzing conditions for generating the observed matter-antimatter asymmetry and potential experimental tests.

## Contribution

It introduces a novel mechanism of baryogenesis in spiral inflation and details the parametric conditions for successful asymmetry generation.

## Key findings

- Baryon asymmetry depends on effective coupling parameters.
- Asymmetry can be achieved during a short matter-dominated era.
- Inflationary expansion rate near current experimental bounds.

## Abstract

We examined the possibility of spontaneous baryogenesis driven by the inflaton in the scenario of \textit{spiral inflation}, and found the parametric dependence of the late-time baryon number asymmetry. As a result, it is shown that, depending on the effective coupling of baryon/lepton number violating operators, it is possible to obtain the right amount of asymmetry even in the presence of a matter-domination era as long as such era is relatively short. In a part of the parameter space, the required expansion rate during inflation is close to the current upper-bound, and hence can be probed in the near future experiments.