Five-dimensional black holes in heterotic string theory

TL;DR

This paper reviews recent advances in understanding five-dimensional black holes within heterotic string theory, focusing on near-horizon solutions, entropy calculations, and comparisons with stringy and perturbative results.

Contribution

It provides a comprehensive review of static black hole solutions and entropy in five-dimensional heterotic string compactifications, highlighting new insights and comparisons with various theoretical approaches.

Findings

D=5 black hole entropy matches microscopic string theory predictions

Near-horizon solutions are consistent with R^2-corrected supergravity

Five-dimensional case offers richer structure than D=4

Abstract

We review recent results on near-horizon static black hole solutions and entropy in R^2-corrected N=2 SUGRA in D=5, focusing on actions connected to heterotic string compactified on K3\times S^1. Comparison with \alpha'-perturbative results, results obtained by using simple Gauss-Bonnet R^2-correction, OSV conjecture and microscopic stringy description (for small black holes) shows that situation in D=5 is, in a sense, even more interesting then in D=4.