Emission of charged particles from four- and five-dimensional black holes

TL;DR

This paper demonstrates that string theory models accurately reproduce the Hawking emission rates of charged particles from near-extremal four- and five-dimensional black holes, extending previous neutral scalar results.

Contribution

It extends the agreement between string theory models and black hole emission rates to charged scalars and different black hole dimensions, using M-theory inspired models.

Findings

Agreement between string models and Hawking emission rates for charged scalars.

Extension of results to four-dimensional black holes using M-theory models.

Validation of string theory descriptions for near-extremal black hole emissions.

Abstract

Recently Das and Mathur found that the leading order Hawking emission rate of neutral scalars by near-extremal $D=5$ black holes is exactly reproduced by a string theoretic model involving intersecting D-branes. We show that the agreement continues to hold for charged scalar emission. We further show that similar agreement can be obtained for a class of near-extremal $D=4$ black holes using a model inspired by M-theory. In this model, BPS saturated $D=4$ black holes with four charges are realized in M-theory as 5-branes triply intersecting over a string. The low-energy excitations are signals traveling on the intersection string.