Sen, Ashoke (2006) Entropy function for heterotic black holes Journal of High Energy Physics, 2006 (5). No pp. given. ISSN 1126-6708
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Official URL: http://iopscience.iop.org/1126-6708/2006/03/008?fr...
Related URL: http://dx.doi.org/10.1088/1126-6708/2006/03/008
Abstract
We use the entropy function formalism to study the effect of the Gauss-Bonnet term on the entropy of spherically symmetric extremal black holes in heterotic string theory in four dimensions. Surprisingly the resulting entropy and the near horizon metric, gauge field strengths and the axion-dilaton field are identical to those obtained by Cardoso et al. for a supersymmetric version of the theory that contains Weyl tensor squared term instead of the Gauss-Bonnet term. We also study the effect of holomorphic anomaly on the entropy using our formalism. Again the resulting attractor equations for the axion-dilaton field and the black hole entropy agree with the corresponding equations for the supersymmetric version of the theory. These results suggest that there might be a simpler description of supergravity with curvature squared terms in which we supersymmetrize the Gauss-Bonnet term instead of the Weyl tensor squared term.
Item Type: | Article |
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Source: | Copyright of this article belongs to Institute of Physics. |
Keywords: | Superstrings and Heterotic Strings; Black Holes in String Theory |
ID Code: | 44006 |
Deposited On: | 20 Jun 2011 07:21 |
Last Modified: | 18 May 2016 00:49 |
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