Hairy Black Holes in String Theory
S. B. Giddings, J. A. Harvey, Joseph Polchinski, S. H. Shenker, A. Strominger
Abstract
Solutions of bosonic string theory are constructed which correspond to four-dimensional black holes with axionic quantum hair. The basic building blocks are the renormalization group flows of the CP1 model with a theta term and the SU(1,1)/U(1) WZW coset conformal field theory. However the solutions are also found to have negative energy excitations, and are accordingly expected to decay to the vacuum.
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