Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2000-02-23
Nucl.Phys.B582:393-406,2000
Physics
High Energy Physics
High Energy Physics - Theory
1+16 pages, latex. Final version to appear on Nucl.Phys.B
Scientific paper
10.1016/S0550-3213(00)00216-9
In this paper we construct the BPS black hole generating solution of toroidally compactified string (and M) theory, giving for it both the macroscopic and microscopic description. Choosing a proper U-duality gauge the latter will be given by a bound state made solely of D-branes. The axionic nature of the supergravity solution will be directly related to non-trivial angles between the constituent D-branes (type IIB configuration) or, in a T-dual gauge, to the presence of magnetic flux on constituent D-brane world volumes (type IIA configuration). As expected, the four dimensional axion fields arise from the dimensional reduction of non-diagonal metric tensor components or Kalb-Ramond B field components for type IIB or type IIA cases, respectively. Thanks to this result it is then now possible to fill the full 56-dimensional U-duality orbit of N=8 BPS black holes and to have a macroscopic and microscopic description of all of them.
Bertolini Matteo
Trigiante Mario
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