Affleck-Dine inflation in supergravity

TL;DR

This paper explores a supersymmetric version of Affleck-Dine inflation using two chiral superfields, demonstrating successful inflation, baryogenesis, and compatibility with observational constraints on isocurvature perturbations.

Contribution

It introduces a supersymmetric implementation of Affleck-Dine inflation with specific superpotential and Kähler potential, maintaining successful inflation and baryogenesis.

Findings

Scalar potential similar to original Affleck-Dine model

Successful inflation and baryogenesis achieved

Isocurvature perturbations are negligible and observationally consistent

Abstract

Affleck-Dine inflation is a recently proposed model in which a single complex scalar field, nonminimally coupled to gravity, drives inflation and simultaneously generates the baryon asymmetry of universe via Affleck-Dine mechanism. In this paper we investigate the supersymmetric implementation of Affleck-Dine inflation in the use of two chiral superfields with appropriate superpotential and K\"ahler potential. The scalar potential has a similar form to the potential of original Affleck-Dine inflation, and it gives successful inflation and baryogenesis. We also consider the isocurvature perturbation evolving after crossing the horizon, and find that it is ignorable and hence consistent with the observations.