BRST Analysis of Physical States in Two-Dimensional Black Hole

Abstract

We study the BRST cohomology for $SL(2,R)/U(1)$ coset model, which describes an exact string black hole solution. It is shown that the physical spectrum could contain not only the extra discrete states corresponding to those in $c=1$ two-dimensional gravity but also many additional new states with ghost number $N_{FP}=-1\sim 2$. We also discuss characters for nonunitary representations and the relation of our results to other approaches.

44 pages, OS-GE 28-93, OU-HET 173

References in corpus (16)

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Cited by in corpus (10)

• D-branes and extended characters in SL(2,R)/U(1)
• String theory on three dimensional black holes
• D-branes and SQCD in Non-Critical Superstring Theory
• Extended SL(2,R)/U(1) characters, or modular properties of a simple non-rational conformal field theory
• D-branes in Lorentzian AdS(3)
• Remarks on free field realization of SL(2,R)/U(1) x U(1) WZNW model
• c < 1 String from Two Dimensional Black Holes
• Topological Cigar and the c=1 String : Open and Closed
• Coulomb-gas formulation of SU(2) branes and chiral blocks
• c=1 String as a Topological Model