Normalization of Type IIB D-instanton Amplitudes

TL;DR

This paper calculates the normalization of single D-instanton amplitudes in type IIB string theory, confirming predictions made by S-duality, thus providing a consistency check for the theory.

Contribution

It provides the first explicit computation of D-instanton amplitude normalization in type IIB string theory, validating S-duality predictions.

Findings

Normalization matches S-duality predictions

Supports consistency of non-perturbative effects in string theory

Strengthens the understanding of D-instanton contributions

Abstract

We compute the normalization of single D-instanton amplitudes in type IIB string theory and show that the result agrees with the prediction of S-duality due to Green and Gutperle.