Chaplygin gas braneworld inflation according to WMAP7 data

TL;DR

This paper investigates a Chaplygin gas model with an exponential potential within braneworld inflation, deriving inflationary parameters under the slow-roll approximation and showing consistency with WMAP7 data.

Contribution

It introduces a Chaplygin gas model in braneworld inflation and derives observable predictions that align with recent cosmic microwave background data.

Findings

Inflation observables depend only on e-folding number and slow-roll parameter.

Model predictions agree with WMAP7 data for small spectral index running.

Derived perturbation parameters in the high-energy limit.

Abstract

We consider a Chaplygin gas model with an exponential potential in framework of braneworld inflation. We apply the slow-roll approximation in the high-energy limit to derive various inflationary spectrum perturbation parameters. We show that the inflation observables depend only on the e-folding number N and the final value of the slow-roll parameter e(end). Whereas for small running of the scalar spectral index dns/dlnk, the inflation observables are in good agreement with recent WMAP7 data.