Fixed scalar greybody factors in five and four dimensions

Details Fixed scalar greybody factors in five and four dimensions Fixed scalar greybody factors in five and four dimensions

1996-12-04

arxiv.org/abs/hep-th/9612051v1

Phys.Rev.D55:3250-3254,1997

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, latex

Scientific paper

10.1103/PhysRevD.55.3250

We perform the classical gravity calculations of the fixed scalar absorption cross-sections by D=5 black holes with three charges and by D=4 black holes with four charges. We obtain analytic results for the cases where the energy and the left and right moving temperatures are sufficiently low but have arbitrary ratios. In D=5 the greybody factor is in perfect agreement with the recent calculation performed in the context of the effective string model for black holes. In D=4 the formula for the greybody factor in terms of the energy and the temperatures differs from that in D=5 only by the overall normalization. This suggests that the fixed scalar coupling to the effective string in D=4 is identical to that in D=5.

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