On the Black-Hole Conformal Field Theory Coupled to the Polyakov's String Theory. A Non Perturbative Analysis
M. Martellini, M. Spreafico, K. Yoshida
Abstract
We couple the 2D black-hole conformal field theory discovered by Witten to a D-1 dimensional Euclidean bosonic string. We demonstrate that the resulting planar (=zero genus) string susceptibility is real for any 0≤ D ≤ 4.
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