Baryogenesis from a CP-violating inflation

TL;DR

This paper proposes a new model of inflation involving CP-violation through complex non-minimal couplings in a 3-Higgs doublet framework, linking inflationary dynamics to baryon asymmetry generation.

Contribution

It introduces a novel CP-violating inflation mechanism using complex couplings in a 3-Higgs doublet model, connecting inflation to baryogenesis.

Findings

Inflationary dynamics are affected by CP-violating couplings.

CP-violation influences particle asymmetries during reheating.

The model provides a new pathway for baryon asymmetry generation.

Abstract

We introduce the novel phenomena of CP-violating inflation in the frameworks of a 3-Higgs doublet model where the inflaton doublets have a non-minimal coupling to gravity. We allow for this coupling to be complex, thereby introducing CP-violation - a necessary source of the baryon asymmetry - in the inflaton couplings. We investigate the inflationary dynamics of such a framework and the inflaton decay in the reheating phase. We discuss how the CP-violation of the model is imprinted on the particle asymmetries.