Comments on SUSY inflation models on the brane

TL;DR

This paper examines various SUSY inflation models on the brane, demonstrating that their parameter spaces can be expanded and inflation scales lowered while maintaining a spectral index of 0.96.

Contribution

It provides a detailed analysis of SUSY inflation models on the brane, highlighting how their parameter spaces and inflation scales can be adjusted without losing desired spectral index values.

Findings

Broadened parameter space for SUSY inflation models

Lowered inflation scale possible on the brane

Achieved spectral index n_s=0.96 in models

Abstract

In this paper we consider a class of inflation models on the brane where the dominant part of the inflaton scalar potential does not depend on the inflaton field value during inflation. In particular, we consider supernatural inflation, its hilltop version, A-term inflation, and supersymmetric (SUSY) D- and F-term hybrid inflation on the brane. We show that the parameter space can be broadened, the inflation scale generally can be lowered, and still possible to have the spectral index $n_s=0.96$.