Dyon Spectrum in N=4 Supersymmetric Type II String Theories

Details Dyon Spectrum in N=4 Supersymmetric Type II String Theories Dyon Spectrum in N=4 Supersymmetric Type II String Theories

2006-07-21

arxiv.org/abs/hep-th/0607155v2

JHEP 0611:073,2006

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX file, 32 pages; v2:minor changes

Scientific paper

10.1088/1126-6708/2006/11/073

We compute the spectrum of quarter BPS dyons in freely acting Z_2 and Z_3 orbifolds of type II string theory compactified on a six dimensional torus. For large charges the result for statistical entropy computed from the degeneracy formula agrees with the corresponding black hole entropy to first non-leading order after taking into account corrections due to the curvature squared terms in the effective action. The result is significant since in these theories the entropy of a small black hole, computed using the curvature squared corrections to the effective action, fails to reproduce the statistical entropy associated with elementary string states.

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