paper

Scale Invariant Hairy Black Holes

arXiv:hep-th/0506025 · doi:10.1103/PhysRevD.72.064019

Abstract

Scalar fields coupled to three-dimensional gravity are considered. We uncover a scaling symmetry present in the black hole reduced action, and use it to prove a Smarr formula valid for any potential. We also prove that non-rotating hairy black holes exists only for positive total energy. The extension to higher dimensions is also considered.

Reference corrected. Added section on charged case. Latex, 23 pages

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