D-brane black holes: large-N limit and the effective string description

Hassan, S. F. ; Wadia, Spenta R. (1997) D-brane black holes: large-N limit and the effective string description Physics Letters B, 402 (1-2). pp. 43-52. ISSN 0370-2693

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/S0370-2693(97)00453-X

Abstract

We address the derivation of the effective conformal field theory description of the 5-dimensional black hole, modelled by a collection of D1- and D5-branes, from the corresponding low energy U(Q1) × U(Q5) gauge theory. Finite horizon size at weak coupling requires both Q1 and Q5 to be large. We derive the result in the moduli space approximation (say for Q1 > Q5) and appeal to supersymmetry to argue its validity beyond weak coupling. As a result of a combination of quenched ZQ1 Wilson lines and a residual Weyl symmetry, the low-lying excitations of the U(Q1) × U(Q5) gauge theory are described by an effective N = 4 superconformal field theory with c = 6 in 1 + 1 dimensions, where the space is a circle of radius RQ1Q5. We also discuss the appearance of a marginal perturbation of the effective conformal field theory for large but finite values of Q5.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:54866
Deposited On:17 Aug 2011 11:45
Last Modified:18 May 2016 07:21

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