ar X iv : h ep - t h / 97 11 05 3 v 1 7 N ov 1 99 7 hep - th / 9711053 BLACK HOLE ENTROPY IN M - THEORY
نویسندگان
چکیده
Extremal black holes in M-theory compactification on M × S 1 are microscopically represented by fivebranes wrapping P × S 1 , where M is a Calabi-Yau threefold and P is a four-cycle in M. Additional spacetime charges arise from momentum around the S 1 and expectation values for the self-dual three-form field strength in the fivebrane. The microscopic entropy of the fivebrane as a function of all the charges is determined from a two-dimensional (0, 4) sigma model whose target space includes the fivebrane moduli space. This entropy is compared to the macroscopic formula. Precise agreement is found for both the tree-level and one-loop expressions.
منابع مشابه
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متن کاملar X iv : h ep - t h / 05 11 26 1 v 1 25 N ov 2 00 5 ITP - UU - 05 / 33 SPIN - 05 / 27 August 2005 Supersymmetric Black Holes
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