F-term Braneworld inflation in Light of Five-year WMAP observations

TL;DR

This paper explores F-term hybrid inflation within a Randall-Sundrum Braneworld model, deriving the scalar potential analytically, addressing fine-tuning issues, and demonstrating consistency with WMAP5, BAO, and SN observational data.

Contribution

It provides an analytical scalar potential for supersymmetric hybrid inflation in the Braneworld context and shows how to resolve fine-tuning problems while fitting observational constraints.

Findings

F-term dominates hybrid inflation process.

Fine-tuning problem can be eliminated for certain brane tension values.

Inflation parameters are consistent with WMAP5, BAO, and SN data.

Abstract

We consider a supersymmetric hybrid inflation in the framework of the Randall-Sundrum type II Braneworld model. We drive an analytical expression for the scalar potential and find that the F-term dominates hybrid inflation process. We show that for some value of Brane tension we can eliminate the fine tuning problem related to coupling constant k of the potential: We also calculate all known spectrum inflation parameters and show that observational bounds from WMAP5, BAO and SN observations are satisfied.