Non-thermal baryogenesis from MSSM flat direction

TL;DR

This paper explores a cosmological model where a flat direction in the MSSM acts as the inflaton, and its decay produces the universe's baryon asymmetry through a non-thermal process.

Contribution

It demonstrates that an inflection point inflation scenario with a specific MSSM flat direction can simultaneously explain inflation and baryogenesis.

Findings

Inflation compatible with cosmological observations.

Baryon asymmetry generated from inflaton decay.

Use of udd flat direction with dimension 6 operator.

Abstract

We study an inflection point inflation scenario where a flat direction of the minimal supersymmetric standard model (MSSM) is identified with the inflaton. We focus on the case where the flat direction (inflaton) has non-zero baryon number, and consider a non-thermal baryogenesis scenario where the decay of the inflaton at the reheating directly generates baryon asymmetry of the Universe. Specifically, we consider a udd flat direction that is lifted by a superpotential operator of dimension 6, and show that inflection point inflation with the udd flat direction can be compatible with cosmological observations and can account for the baryon asymmetry of the Universe.