We examine the dynamics of extended branes, carrying lower-dimensional brane charges, wrapping black holes and black hole microstates in M and type II string theory. We show that they have a universal dispersion relation typical of threshold bound states with a total energy equal to the sum of the contributions from the charges. In near-horizon geometries of black holes, these are BPS states, and the dispersion relation follows from supersymmetry as well as properties of the conformal algebra. However they break all supersymmetries of the full asymptotic geometries of black holes and microstates. We comment on a recent proposal which uses these states to explain black hole entropy.
|Number of pages||37|
|Journal||Nuclear Physics B|
|State||Published - Jan 23 2006|
Bibliographical noteFunding Information:
S.R.D. would like to thank the Tata Institute of Fundamental Research for hospitality during the completion of this paper. The work of S.R.D., X.W and C.Z was partially supported by the National Science Foundation Grant No. PHY-0244811 and by the Department of Energy Contract No. DE-FG-01-00ER45832. S.G. was supported by an INFN fellowship. We are grateful to B. de Wit, T. McLoughlin, and J. Michelson for discussions.
ASJC Scopus subject areas
- Nuclear and High Energy Physics