Combining Universal and Odd RR Axions for Aligned Natural Inflation

TL;DR

This paper demonstrates how to embed the KNP alignment mechanism within large volume type IIB orientifolds, enhancing axion decay constants for natural inflation using universal and odd RR axions.

Contribution

It introduces a novel embedding of the KNP alignment mechanism in large volume IIB orientifolds, utilizing both universal and odd RR axions for inflation.

Findings

Successful embedding of KNP alignment in IIB orientifolds.

Identification of flat directions in ($C_0$-$C_2$) axion plane.

Established moduli stabilization with large volume scheme.

Abstract

We successfully embed the Kim-Nilles-Peloso (KNP) alignment mechanism for enhancing the axion decay constant in the context of large volume type IIB orientifolds. The flat direction is generated in the plane of ($C_0$-$C_2$) axions corresponding to the involutively even universal axion $C_0$ and odd axion $C_2$, respectively. The moduli stabilization with large volume scheme has been established as well.