alpha '(2)-corrections to extremal dyonic black holes in heterotic string theory

作者：Cvitan Maro^*; Prester Predrag Dominis; Ficnar Andrej

来源：The Journal of High Energy Physics, 2008, (5): 063.

• superstrings and heterotic strings
• black holes in string theory

We calculate alpha'(2)-corrections to the entropy of the 5-dimensional 3-charge and the 4-dimensional 4-charge large extremal black holes using the low energy effective action of the heterotic string theory. In the 4-dimensional case, our results are in agreement with the microscopic statistical entropy both for the BPS and the non-BPS black holes. In the more interesting 5-dimensional case, where the direct microscopic stringy description is still unknown, our results for the BPS black holes are in agreement with the results obtained from the action supplemented with R-2-correction obtained by supersymmetric completion of the gravitational Chern-Simons term. This agreement does not extend to the non-BPS black holes, for which we propose a different expression for the entropy. We show that the new expression is supported by certain alpha'(3)-order calculations, and by the arguments based on the AdS/CFT correspondence.

• 出版日期2008-5