Nonminimal Inflation on the Randall-Sundrum II Brane with Induced Gravity

TL;DR

This paper explores how non-minimal coupling of the inflaton to induced scalar curvature affects inflationary dynamics on the RS II brane, providing constraints based on observational data.

Contribution

It introduces a non-minimal coupling in RS II brane inflation and analyzes its impact on inflationary parameters and observational constraints.

Findings

Number of e-folds decreases with increased non-minimal coupling

Constraints on non-minimal coupling from observational data

Comparison with minimal coupling case

Abstract

We study an inflation model that inflaton field is non-minimally coupled to the induced scalar curvature on the Randall-Sundrum (RS) II brane. We investigate the effects of the non-minimal coupling on the inflationary dynamics of this braneworld model. Our study shows that the number of e-folds decreases by increasing the value of the non-minimal coupling. We compare our model parameters with the minimal case and also with recent observational data. In comparison with recent observation, we obtain a constraint on the values that the non-minimal coupling attains.