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-external 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-[Formula presented][Formula presented] fields of pure [Formula presented] supergravity which respects the unbroken supersymmetry of extreme black holes and correctly predicts dilaton, axion, and fermion cross sections up to an overall normalization.
|Number of pages
|Physical Review D - Particles, Fields, Gravitation and Cosmology
|Published - 1997
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)