Affleck-Dine Baryogenesis in Effective Supergravity

TL;DR

This paper examines the feasibility of Affleck-Dine baryogenesis within supergravity models derived from string theory, focusing on initial conditions that enable baryon asymmetry generation during inflation.

Contribution

It analyzes conditions under which supersymmetric flat directions acquire tachyonic masses during inflation in supergravity models from string theory.

Findings

Identifies scenarios with geometric modulus or hidden sector scalar breaking supersymmetry during inflation.

Outlines initial conditions necessary for Affleck-Dine baryogenesis in these models.

Abstract

We investigate the viability of Affleck-Dine baryogenesis in D=4, N=1 supergravity descending from string theory. The process relies on an initial condition where visible sector supersymmetric flat directions obtain tachyonic masses during inflation. We discuss this condition for a variety of cases where supersymmetry is broken during inflation by a geometric modulus or hidden sector scalar, and outline scenarios where the initial condition is satisfied.