Inflation induced by Gravitino Condensation in Supergravity

TL;DR

This paper explores how gravitino condensation in supergravity can lead to an inflationary phase, aligning with Planck data, by analyzing dynamical supersymmetry breaking and the role of the gravitino condensate as the inflaton.

Contribution

It introduces a model where the gravitino condensate acts as the inflaton in supergravity, compatible with observational data, through dynamical supersymmetry breaking mechanisms.

Findings

Inflation can be driven by gravitino condensate in supergravity.

Models with small gravitino masses fit Planck CMB data.

Dynamical supersymmetry breaking induces inflationary dynamics.

Abstract

We discuss the emergence of an inflationary phase in supergravity with the super-Higgs effect due to dynamical spontaneous breaking of supersymmetry, in which the role of the inflaton is played by the gravitino condensate. Realistic models compatible with the Planck satellite CMB data are found in conformal supergravity scenarios with dynamical gravitino masses that are small compared to the Planck mass, as could be induced by a non-trivial vacuum expectation value of the dilaton superfield of appropriate magnitude.