Supergravity origin of the MSSM inflation

TL;DR

This paper explores how supergravity frameworks can naturally produce the conditions necessary for MSSM inflation, emphasizing the role of specific Kahler potentials that align with string theory compactifications, reducing fine-tuning needs.

Contribution

It derives conditions on the Kahler potential for MSSM inflation to occur independently of hidden sector vevs, linking supergravity models with string theory insights.

Findings

Identifies a class of Kahler potentials compatible with MSSM inflation.

Shows that slow roll inflation can occur without fine tuning of soft parameters.

Connects supergravity conditions with string theory compactifications.

Abstract

We consider the supergravity origin of the recently proposed MSSM inflationary model, which relies on the existence of a saddle point along a dimension six flat direction. We derive the conditions that the Kahler potential has to satisfy for the saddle point to exist irrespective of the hidden sector vevs. We show that these conditions are satisfied by a simple class of Kahler potentials, which we find to have a similar form as in various string theory compactifications. For these potentials, slow roll MSSM inflation requires no fine tuning of the soft supersymmetry breaking parameters.