New D-term chaotic inflation in supergravity and leptogenesis

TL;DR

This paper introduces a novel D-term dominated chaotic inflation model within supergravity, which avoids cosmic string formation and explores leptogenesis via inflaton decay, offering new insights into early universe cosmology.

Contribution

It proposes a new supergravity-based D-term chaotic inflation model with unique features like symmetry breaking during inflation and leptogenesis mechanisms.

Findings

Inflation driven by D-term in supergravity without cosmic string formation.

Reheating occurs after inflation due to the D-term potential.

Leptogenesis can be achieved through inflaton decay in this scenario.

Abstract

We present a new model of D-term dominated chaotic inflation in supergravity. The F-flat direction present in this model is lifted by the dominant D-term, which leads to chaotic inflation and subsequent reheating. No cosmic string is formed after inflation because the U(1) gauge symmetry is broken during inflation. The leptogenesis scenario via the inflaton decay in our D-term chaotic inflation scenario is also discussed.