Absorption of photons and fermions by black holes in four dimensions

Details Absorption of photons and fermions by black holes in four dimensions Absorption of photons and fermions by black holes in four dimensions

1997-06-12

arxiv.org/abs/hep-th/9706100v2

Phys.Rev.D56:7854-7868,1997

Physics

High Energy Physics

High Energy Physics - Theory

31 pages, uses harvmac, minor corrections, references added

Scientific paper

10.1103/PhysRevD.56.7854

The absorption of photons and fermions into four-dimensional black holes is described by equations which in certain cases can be analyzed using dyadic index techniques. The resulting absorption cross-sections for near-extremal black holes have a form at low energies suggestive of the effective string model. A coupling to the effective string is proposed for spin-0 and spin-1/2 fields of pure N=4 supergravity which respects the unbroken supersymmetry of extreme black holes and correctly predicts dilaton, axion, and fermion cross-sections up to an overall normalization.

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