Renormalization of the Planck mass for type II superstrings on symmetric orbifolds

TL;DR

This paper calculates the one-loop quantum corrections to the Planck mass in type II superstring theories compactified on symmetric orbifolds, revealing potential significant modifications to the classical value.

Contribution

It provides the first detailed computation of one-loop Planck mass renormalization in type II string theories on symmetric orbifolds with ${ m N}=2$ supersymmetry.

Findings

One-loop corrections can rival the tree-level Planck mass.

The magnitude of the correction varies depending on the orbifold.

The results impact understanding of quantum gravity in string theory.

Abstract

We compute the one-loop renormalization of the Planck mass for type II string theories compactified to four dimensions on symmetric orbifolds that preserve ${\cal N}=2$ supersymmetry. Depending on the orbifold, the effect can be as large as to compete with the standard tree-level value.