D-brane decay and Hawking Radiation

TL;DR

This paper demonstrates that quantum corrections to D-brane decay processes vanish or align with black hole predictions at low energies, explaining why tree-level calculations match semiclassical Hawking radiation.

Contribution

It shows that one-loop open string corrections to D-brane emission processes are negligible or consistent with black hole results at low energies, supporting the validity of tree-level approximations.

Findings

One-loop corrections vanish at low energies.

Nonvanishing loop contributions match black hole predictions.

Tree-level decay amplitudes reproduce Hawking radiation rates.

Abstract

Tree level decay amplitudes of near-BPS D-brane configurations are known to exactly reproduce Hawking radiation rates from corresponding black holes at low energies even though the brane configurations describe semiclassical black holes only when the open string couplings are large. We show that a large class of one (open string) loop corrections to emission processes from D-branes vanish at low energies and nonvanishing loop contributions have an energy dependence consistent with black hole answers, thus providing a justification for the agreement of the tree level results with semiclassical answers.