Inflection point inflation and dark energy in supergravity

TL;DR

This paper presents a supergravity inflation model with an inflection point that aligns with Planck data and explains current cosmic acceleration through a non-SUSY de-Sitter vacuum resulting from post-inflation supersymmetry breaking.

Contribution

It introduces a supergravity-based inflection point inflation model that simultaneously accounts for cosmic inflation and dark energy within a unified framework.

Findings

Predicted scalar spectral index and tensor-to-scalar ratio match Planck 2015 results.

Supersymmetry is strongly broken after inflation, leading to a non-SUSY de-Sitter vacuum.

Model provides a consistent explanation for both early universe inflation and late-time acceleration.

Abstract

We consider an inflection point inflationary model in supergravity with a single chiral superfield and show that the predicted values of the scalar spectral index and tensor-to-scalar ratio are consistent with the Planck 2015 results. In this model supersymmetry is strongly broken after inflation, which results in a non-SUSY de-Sitter vacuum responsible for the recent accelerated expansion of the Universe.