2006/08/31 by Bindusar Sahoo, Ashoke Sen · 3 citations
Physics and Astronomy · #Astrophysical Phenomena and Observations #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #hep-th
paper · pdf · doi:10.1088/1126-6708/2007/01/010
published as JHEP 0701:010,2007 · LaTeX file, 18 pages; v3: some normalization conventions changed so as to be compatible with standard convention
openalex publication_date 2007/01/04 · arxiv created 2007/05/19 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We explicitly compute the entropy of an extremal dyonic black hole in heterotic string theory compactified on T6 or K3× T2 by taking into account all the tree level four derivative corrections to the low energy effective action. For supersymmetric black holes the result agrees with the answer obtained earlier 1) by including only the Gauss-Bonnet corrections to the effective action 2) by including all terms related to the curvature squared terms via space-time supersymmetry transformation, and 3) by using general arguments based on the assumption of AdS3 near horizon geometry and space-time supersymmetry. For non-supersymmetric extremal black holes the result agrees with the one based on the assumption of AdS3 near horizon geometry and space-time supersymmetry of the underlying theory.