1/8 BPS black hole composites

Details 1/8 BPS black hole composites 1/8 BPS black hole composites

2010-01-19

arxiv.org/abs/1001.3157v1

Physics

High Energy Physics

High Energy Physics - Theory

19 pages

Scientific paper

We show that the 1/8 BPS condition for composite stationary black holes can be rewritten as a first order system of differential equations associated to the nilpotent orbit in which lie the Noether charges of the black holes. Solving these equations, we prove that the most general 1/8 BPS black hole composites are solutions of the N=2 truncation of the theory associated to the quaternions. This system of first order differential equations generalises to the non-BPS solutions with a vanishing central charge at the horizon in N=2, 4 supergravity theories with a symmetric moduli space. We solve these equations for the exceptional N=2 supergravity associated to the octonions.

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