Brane inflation: A field theory approach in background supergravity

TL;DR

This paper develops a brane inflation model within background supergravity, deriving inflaton potentials and parameters that align with observational data, and explores reheating and leptogenesis in early universe cosmology.

Contribution

It introduces a novel brane inflation framework derived from bulk supergravity, with detailed potential calculations and phenomenological analysis of reheating and leptogenesis.

Findings

Inflationary parameters match recent observational data.

Reheating phenomenology explains thermal history and leptogenesis.

Derived inflaton potential differs from standard cosmology results.

Abstract

We propose a model of inflation in the framework of brane cosmology driven by background supergravity. Starting from bulk supergravity we construct the inflaton potential on the brane and employ it to investigate for the consequences to inflationary paradigm. To this end, we derive the expressions for the important parameters in brane inflation, which are somewhat different from their counterparts in standard cosmology, using the one loop radiative corrected potential. We further estimate the observable parameters and find them to fit well with recent observational data. We have studied extensively reheating phenomenology, which explains the thermal history of the universe and leptogenesis through the production of thermal gravitino pertaining to the particle physics phenomenology of the early universe.