Black Holes in Supergravity: the non-BPS Branch

Abstract

We construct extremal, spherically symmetric black hole solutions to 4D supergravity with charge assignments that preclude BPS-saturation. In particular, we determine the ground state energy as a function of charges and moduli. We find that the mass of the non-BPS black hole remains that of a marginal bound state of four basic constituents throughout the entire moduli space and that there is always a non-zero gap above the BPS bound.

29 pages, one appendix, no figures; v2. few comments and references added and a missing sign included; v3. further references added