Tachyon Hair on Two-Dimensional Black Holes

Details Tachyon Hair on Two-Dimensional Black Holes Tachyon Hair on Two-Dimensional Black Holes

1993-05-08

arxiv.org/abs/hep-th/9305030v1

Phys.Rev.D48:2415-2420,1993

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, 1 figure (not included), uses phyzzx, SU-ITP-93-10

Scientific paper

10.1103/PhysRevD.48.2415

Static black holes in two-dimensional string theory can carry tachyon hair. Configurations which are non-singular at the event horizon have non-vanishing asymptotic energy density. Such solutions can be smoothly extended through the event horizon and have non-vanishing energy flux emerging from the past singularity. Dynamical processes will not change the amount of tachyon hair on a black hole. In particular, there will be no tachyon hair on a black hole formed in gravitational collapse if the initial geometry is the linear dilaton vacuum. There also exist static solutions with finite total energy, which have singular event horizons. Simple dynamical arguments suggest that black holes formed in gravitational collapse will not have tachyon hair of this type.

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