Stringy effects in black hole decay

We compute the low energy decay rates of near-extremal three(four) charge black holes in five(four) dimensional string theory to sub-leading order in the large charge approximation. This involves studying stringy corrections to scattering amplitudes of a scalar field off a black hole. We adapt and u...

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Bibliographic Details
Published in:The journal of high energy physics 2010-11, Vol.2010 (11), Article 64
Main Authors: Kuperstein, Stanislav, Murthy, Sameer
Format: Article
Language:English
Subjects:
Amplitudes
Black holes
Classical and Quantum Gravitation
Decay rate
Elementary Particles
High energy physics
Mathematical analysis
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Relativity Theory
Scalars
Scattering cross sections
String Theory
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Summary:We compute the low energy decay rates of near-extremal three(four) charge black holes in five(four) dimensional string theory to sub-leading order in the large charge approximation. This involves studying stringy corrections to scattering amplitudes of a scalar field off a black hole. We adapt and use recently developed techniques to compute such amplitudes as near-horizon quantities. We then compare this with the corresponding calculation in the microscopic configuration carrying the same charges as the black hole. We find perfect agreement between the microscopic and macroscopic calculations; in the cases we study, the zero energy limit of the scattering cross section is equal to four times the Wald entropy of the black hole.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP11(2010)064