Global Embedding of Fibre Inflation in Perturbative LVS

TL;DR

This paper embeds Fibre inflation within the perturbative large volume scenario to address field range constraints, utilizing string-loop and higher derivative effects to generate the inflationary potential.

Contribution

It provides a global embedding of Fibre inflation in perturbative LVS, alleviating field range bounds and improving compatibility with supergravity constraints.

Findings

Embedding in perturbative LVS relaxes Kähler cone bounds.

String-loop and F^4 effects generate the inflationary potential.

Enhanced compatibility with supergravity approximations.

Abstract

We present a global embedding of the Fibre inflation model in perturbative large volume scenario (LVS) in which the inflationary potential is induced via a combination of string-loop corrections and higher derivative F$^4$-effects. The minimal Fibre inflation model developed in the standard LVS generically faces some strong bounds on the inflaton field range arising from the K\"ahler cone constraints, which subsequently creates a challenge for realising the cosmological observables while consistently respecting the underlying supergravity approximations. The main attractive feature of this proposal is to naturally alleviate this issue by embedding Fibre inflation in perturbative LVS.