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Gravitational/electromagnetic conversion scattering on fixed charges in the Born approximation

Journal Article · · Phys. Rev., D; (United States)
In the presence of nonzero background electromagnetic and gravitational fields, perturbations in these fields are coupled, via the Einstein-Maxwell equations. We investigate the differential cross section for the conversion scattering of electromagnetic to gravitational radiation (and vice versa) on fixed charged masses. Our procedure uses a Born approximation at the level of accuracy in which the horizon structure of putative black holes is lost; our fixed charges therefore represent charged black holes at this order. We find conversion differential cross sections of the order of Ge/sup 2/ (G is Newton's gravitational constant, e is the value of the charge), with angular polarization factors, and with a forward-divergent behavior proportionalsin/sup -2/(theta/2). The divergence is shown to arise not only in the Born approximation, but to be implicit in the known behavior of the large-angular-momentum phase shifts for the partial-wave spherical modes.
Research Organization:
Centro de Estudios Nucleares, Universidad Nacional Autonoma de Mexico, Mexico
OSTI ID:
6660578
Journal Information:
Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 23:2; ISSN PRVDA
Country of Publication:
United States
Language:
English