Kerr/CFT Correspondence in the Low Energy Limit of Heterotic String Theory

Details Kerr/CFT Correspondence in the Low Energy Limit of Heterotic String Theory Kerr/CFT Correspondence in the Low Energy Limit of Heterotic String Theory

2009-01-13

arxiv.org/abs/0901.1670v3

JHEP 0908:045,2009

Physics

High Energy Physics

High Energy Physics - Theory

14 pages, a few sentences added to the introduction, version to appear in JHEP

Scientific paper

10.1088/1126-6708/2009/08/045

We investigate the recently proposed Kerr/CFT correspondence in the context of heterotic string theory. The Kerr/CFT correspondence states that the near-horizon states of an extremal four (or higher) dimensional black hole could be identified with a certain chiral conformal field theory under the conjecture that the central charges from the non-gravitational fields vanish. The corresponding Virasoro algebra is generated by a class of diffeomorphisms which preserves the appropriate boundary conditions on the near-horizon geometry. To understand the chiral conformal field theory, we consider the class of extremal Kerr-Sen black hole (that contains three non-gravitational fields) as a class of solutions in the low energy limit (effective field theory) of heterotic string theory. We derive the expression of the conserved charges for the extremal Kerr-Sen solutions that contain dilaton, abelian gauge filed and antisymmetric tensor filed. We confirm and extend the validity of the conjecture (that the central charges from the non-gravitational fields vanish) for theories including antisymmetric tensor fields. We combine the calculated central charges with the expected form of the temperature using the Cardy formula to obtain the entropy of the extremal black hole microscopically; in agreement with the macroscopic Bekenstein-Hawking entropy of the extremal black hole.

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