Near-horizon behavior of string-loop-corrected dyonic black holes

TL;DR

This paper investigates how string-loop corrections affect the near-horizon structure of dyonic black holes in N=2 supersymmetric heterotic string theory, revealing supersymmetry restoration at the horizon.

Contribution

It provides a first-order perturbative analysis of string-loop effects on dyonic black holes and demonstrates supersymmetry restoration at the horizon.

Findings

String-loop corrections modify black hole solutions near the horizon.

Supersymmetry is restored at the horizon due to string-loop effects.

The analysis is performed within N=2 supersymmetric heterotic string theory.

Abstract

Dyonic black holes with string-loop corrections are studied in the near-horizon region. In perturbative heterotic string theory compactified to four dimensions with N=2 supersymmetry, in the first order in string-loop expansion parameter, we solve the system of Maxwell and Killing spinor equations for dyonic black hole. At the horizon, the string-loop-corrected solution displays restoration of spontaneously broken supersymmetry.