Threebrane Absorption and Emission from a Brane-Antibrane System

TL;DR

This paper demonstrates that a brane-antibrane system model accurately reproduces the absorption and emission properties of a black threebrane in supergravity, supporting the model's validity beyond extremality.

Contribution

It shows the brane-antibrane model matches supergravity predictions for black threebrane absorption/emission at arbitrary temperatures, extending previous near-extremal results.

Findings

Model reproduces supergravity absorption probabilities for arbitrary partial waves.

Provides evidence supporting the brane-antibrane model for non-extremal black branes.

Corrects and extends previous absorption probability calculations.

Abstract

We show that a previously proposed model based on a D3-brane--anti-D3-brane system at finite temperature can reproduce the low-frequency absorption and emission probabilities of the black threebrane of Type IIB supergravity arbitrarily far from extremality, for arbitrary partial waves of a minimal scalar field. Our calculations cover in particular the case of the neutral threebrane, which corresponds to the Schwarzschild black hole in seven dimensions. Our results provide not only significant evidence in favor of the brane-antibrane model, but also a rationale for the condition that the energies of the two component gases agree with one another. In the course of our analysis we correct previous results on the absorption probabilities of the near-extremal threebrane, and extend them to the far-from-extremal regime.