On \alpha' corrections in N=1 F-theory compactifications

TL;DR

This paper derives new ' corrections to the 4D effective action in N=1 F-theory and Type IIB compactifications, originating from higher derivative terms in 11D supergravity, affecting Kahler moduli and curvature.

Contribution

It introduces novel ' corrections to the effective action that depend on brane intersections and survive the M-theory to F-theory limit.

Findings

Identified a correction to Kahler moduli from brane intersection curves.

Derived a four-dimensional higher curvature correction.

Confirmed the corrections originate from higher derivative terms in 11D supergravity.

Abstract

We consider N=1 F-theory and Type IIB orientifold compactifications and derive new \alpha' corrections to the four-dimensional effective action. They originate from higher derivative corrections to eleven-dimensional supergravity and survive the M-theory to F-theory limit. We find a correction to the Kahler moduli depending on a non-trivial intersection curve of seven-branes. We also analyze a four-dimensional higher curvature correction.