Positivity of Single-Centred Black Hole Indices in the \( \mathbb{Z}_2 \) CHL Model
Year: 2026
Type: preprint
Abstract: We prove Sen's positivity conjecture for single-centred quarter-BPS black holes of the \( Z_2 \) CHL model for every charge with \( Q^2\le2 \) and for every charge of discriminant at most 800. For all charges we reduce the conjecture to an explicit level-two Rademacher expansion of the dyon partition function and prove it under that hypothesis.
Source: Preprints.org
Author: Deep Bhattacharjee
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7225810766
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