Spectrum of Dyons and Black Holes in CHL orbifolds using Borcherds Lift

Abstract

The degeneracies of supersymmetric quarter BPS dyons in four dimensions and of spinning black holes in five dimensions in a CHL compactification are computed exactly using Borcherds lift. The Hodge anomaly in the construction has a physical interpretation as the contribution of a single M-theory Kaluza-Klein 6-brane in the 4d-5d lift. Using factorization, it is shown that the resulting formula has a natural interpretation as a two-loop partition function of left-moving heterotic string, consistent with the heuristic picture of dyons in the M-theory lift of string webs.

23 pages, 1 figure

References in corpus (3)

• Product Representation of Dyon Partition Function in CHL Models
• On the partition sum of the NS five-brane
• Re-Recounting Dyons in N=4 String Theory

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