Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-11-10
Fortsch.Phys.55:798-803,2007
Physics
High Energy Physics
High Energy Physics - Theory
To be published in Talk given at the 2nd Workshop and Midterm Meeting of the Marie Curie RTN "Constituents, Fundamental Forces
Scientific paper
10.1002/prop.200610361
We show that requiring unbroken supersymmetry everywhere in black-hole-type solutions of N=2,d=4 supergravity coupled to vector supermultiplets ensures in most cases absence of naked singularities. We show that the requirement of global supersymmetry implies the absence of sources for NUT charge, angular momentum, scalar hair and negative energy, for which there is no microscopic interpretation in String Theory. These conditions exclude, for instance, singular solutions such as the Kerr-Newman with M=|q|, which fails to be everywhere supersymmetric. There are, nevertheless, everywhere supersymmetric solutions with "global" angular momentum and non-trivial scalar fields. We also present similar preliminary results in N=1,d=5 supergravity coupled to vector multiplets.
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