Tachyon Effects on the 2-Dim Black Hole Geometry
G. A. Diamandis, B. C. Georgalas, E. Papantonopoulos
Abstract
We study solutions of the tree level string effective action in the presence of the tachyon mode.We find that the 2-dim. static black hole is stable against tachyonic perturbations.For a particular ansatz for the tachyon field we find an exact solution of the equations of motion which exhibits a naked singularity.In the case of static fields we find numerically that the full system has a black hole solution,with the tachyon regular at the horizon.
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