Accidental K\"ahler Moduli Inflation

TL;DR

This paper explores a string theory inflation model where inflation occurs near a K"ahler modulus inflection point, using racetrack structures and D-term models to address stability concerns and hierarchy issues.

Contribution

It introduces a racetrack-based model of K"ahler moduli inflation that mitigates loop correction concerns and relaxes gauge hierarchy constraints, especially with D-term racetrack setups.

Findings

Racetrack structures help prevent loop correction spoilage.

D-term racetrack models relax hierarchy constraints.

Inflation occurs near the K"ahler modulus inflection point.

Abstract

We study a model of accidental inflation in type IIB string theory where inflation occurs near the inflection point of a small K\"ahler modulus. A racetrack structure helps to alleviate the known concern that string-loop corrections may spoil K\"ahler Moduli Inflation unless having a significant suppression via the string coupling or a special brane setup. Also, the hierarchy of gauge group ranks required for the separation between moduli stabilization and inflationary dynamics is relaxed. The relaxation becomes more significant when we use the recently proposed D-term generated racetrack model.