Black Holes as Fundamental Strings: Comparing the Absorption of Scalars

Details Black Holes as Fundamental Strings: Comparing the Absorption of Scalars Black Holes as Fundamental Strings: Comparing the Absorption of Scalars

1997-04-29

arxiv.org/abs/hep-th/9704204v3

Phys.Rev. D56 (1997) 3591-3599

Physics

High Energy Physics

High Energy Physics - Theory

20 pages, LaTeX. Few minor changes. Version to appear in PRD

Scientific paper

10.1103/PhysRevD.56.3591

The recently proposed ``correspondence principle'' of Horowitz and Polchinski provides a concrete means to relate (among others) black holes with electric NS-NS charges to fundamental strings and correctly match their entropies. We test further this correspondence by examining the greybody factors in the absorption rates of neutral, minimally coupled scalars by a near extremal black hole. Perhaps surprisingly, the results disagree in general with the absorption by weakly coupled strings. Though this does not disprove the correspondence, it indicates that it might not be simple in this region of the black hole parameter space.

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