On 5D Small Black Holes

TL;DR

This paper investigates five-dimensional small black holes with higher order corrections, revealing supersymmetry enhancement in near horizon geometry that helps distinguish small from large black holes.

Contribution

It demonstrates supersymmetry enhancement in 5D small black holes and identifies the supergroup structure, clarifying differences between small and large black holes.

Findings

Supersymmetry increases to 8 and 16 supercharges near the horizon.

Supergroup structure distinguishes small from large black holes.

Higher order corrections are crucial for supersymmetry enhancement.

Abstract

Using higher order corrections we argue that five dimensional N=2 and N=4 small black holes exhibit supersymmetry enhancement in near horizon geometry leading to eight and sixteen supercharges, respectively. Using this enhancement at supergravity level we can identify the global supergroup of the near horizon geometry. In particular we show how this supergroup distinguishes between small and large black holes in N=2 case.