The structure of N=2 multi-instanton and string-loop corrections in toroidal orbifold models

TL;DR

This paper analyzes the structure of N=2 multi-instanton and string-loop corrections in type I toroidal orbifold models, using heterotic dual calculations to understand their effects on the Kähler potential and gauge kinetic functions.

Contribution

It provides a detailed understanding of non-perturbative and perturbative corrections in N=2 toroidal orbifold models through duality-based calculations.

Findings

Explicit form of multi-instanton corrections derived

String-loop corrections to gauge couplings characterized

Dual heterotic calculations validated the corrections' structure

Abstract

We summarize the structure of N=2 multi-instanton and string loop corrections to the K\"ahler potential and the gauge kinetic function in type I toroidal orbifold models. For that aim, we exploit perturbative calculations of the physical gauge couplings on the heterotic dual, whenever such a perturbative description is available.