Warming up D3 brane motion in the background of D5 brane and Inflation

TL;DR

This paper investigates warm inflation driven by a D3 brane moving towards D5 branes, analyzing the effects of different dissipation parameters on inflationary observables and non-Gaussianity.

Contribution

It introduces a model of warm inflation with a D3 brane in D5 brane background, comparing arbitrary and specific dissipation functions, and explores resulting cosmological predictions.

Findings

Observables fit within observational constraints for various parameters.

Spectral index is consistently blue in the specific dissipation case.

Non-Gaussianity during inflation is discussed.

Abstract

The position of a mobile D-3 brane moving towards a stack of localized D-5 branes has been studied as a candidate driving inflation in the warm inflationary scenario. We compare the results obtained by considering the dissipation parameter $\Gamma$ as an arbitrary function of only the inflaton field and a particular form derived by Bastro-Gil et al \cite{Berera8}. We find that the observables remain well within the recent observational constraint for a wide range of model parameters for the first case whereas the spectral index in the later case is always predicted blue, other cosmological observables remaining well within bound for a wider range of parameters though. We also discuss the non-gaussianity generated during inflation in this model.