Massive and Massless Supersymmetric Black Holes
Abstract
We review some recent work on the existence and classification of extreme black-hole-type solutions in N = 8 supergravity. For the black holes considered (those that are also solutions of N = 4 supergravity and of the Einstein-Maxwell-dilaton theory with coupling a) a complete classification is achieved: the only possible values of a are √3,1,1/√3,0. Up to U duality transformations there is only one solution for each of those values. The exception is a = 0 for which an additional extreme but non-supersymmetric Reissner-Nordström black hole solution exists. We also study the so-called massless black-hole solutions. We argue that they can be understood as composite objects. At least one of the components would have "negative mass". We also argue that these states, being annihilated by all the generators in the supersymmetry algebra, could also constitute alternative vacua of the supergravity theory.
- Publication:
-
Nuclear Physics B Proceedings Supplements
- Pub Date:
- May 1997
- DOI:
- 10.1016/S0920-5632(97)00082-0
- arXiv:
- arXiv:hep-th/9608044
- Bibcode:
- 1997NuPhS..55..219O
- Keywords:
-
- High Energy Physics - Theory
- E-Print:
- Latex file, 18 pages (less with optional macros included). Contribution to the Trieste Workshop on String Theory, Gauge theory and Quantum Gravity