Braneworld inflation

TL;DR

This paper explores various models of four-dimensional braneworld inflation within warped string theory geometries, focusing on D-brane dynamics and their phenomenological implications.

Contribution

It constructs new inflationary models with D3 and D5 branes in warped geometries, including a novel example, and analyzes their slow-roll conditions.

Findings

Successful realization of slow-roll inflation in warped string geometries.

Construction of a new inflationary throat geometry.

Analysis of phenomenological aspects of brane inflation models.

Abstract

We discuss various realizations of the four dimensional braneworld inflation in warped geometries of string theory. In all models the inflaton field is represented by a Dp probe brane scalar specifying its position in the warped throat of the compactification manifold. We study existing inflationary throat local geometries, and construct a new example. The inflationary brane is either a D3- or a D5-brane of type IIB string theory. In the latter case the inflationary brane is wrapping a two-cycle of the compactification manifold. We discuss some phenomenological aspects of the model where slow-roll conditions are under computational control.