Abstract
For dyons in heterotic string theory compactified on a six-torus, with electric charge vector Q and magnetic charge vector P, the positive integer I ≡ gcd(Q ∧ P) is an invariant of the U-duality group. We propose the microscopic theory for computing the spectrum of all dyons for all values of I, generalizing earlier results that exist only for the simplest case of I = 1. Our derivation uses a combination of arguments from duality, 4d-5d lift, and a careful analysis of fermionic zero modes. The resulting degeneracy agrees with the black hole degeneracy for large charges and with the degeneracy of field-theory dyons for small charges. It naturally satisfies several physical requirements including integrality and duality invariance. As a byproduct, we also derive the microscopic (0, 4) superconformal field theory relevant for computing the spectrum of five-dimensional Strominger-Vafa black holes in ALE backgrounds and count the resulting degeneracies.
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ArXiv ePrint: 0803.2692
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Dabholkar, A., Gomes, J. & Murthy, S. Counting all dyons in \( \mathcal{N} = 4 \) string theory. J. High Energ. Phys. 2011, 59 (2011). https://doi.org/10.1007/JHEP05(2011)059
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DOI: https://doi.org/10.1007/JHEP05(2011)059