Superradiance Exclusions in the Landscape of Type IIB String Theory

• DOI: 10.48550/arxiv.2011.08693
• Publication Date: 2020-01-01
• Authors: Mehta, Viraf M.; Demirtas, Mehmet; Long, Cody; Marsh, David J. E.; McAllister, Liam; Stott, Matthew J.
• Keywords: High Energy Physics - Theory; High Energy Physics - Phenomenology; High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Theory (hep-th); 0103 physical sciences; FOS: Physical sciences; 01 natural sciences

6 pages, 3 figures. v2: expanded dataset; minor corrections and clarifications<br/>We obtain constraints from black hole superradiance in an ensemble of compactifications of type IIB string theory. The constraints require knowing only the axion masses and self-interactions, and are insensitive to the cosmological model. We study more than $2 \cdot 10^5$ Calabi-Yau manifolds with Hodge numbers $1\leq h^{1,1}\leq 491$ and compute the axion spectrum at two reference points in moduli space for each geometry. Our computation of the classical theory is explicit, while for the instanton-generated axion potential we use a conservative model. The measured properties of astrophysical black holes exclude parts of our dataset. At the point in moduli space corresponding to the tip of the stretched K��hler cone, we exclude $\approx 50\%$ of manifolds in our sample at 95% C.L., while further inside the K��hler cone, at an extremal point for realising the Standard Model, we exclude a maximum of $\approx 7\%$ of manifolds at $h^{1,1}=11$, falling to nearly zero by $h^{1,1}=100$.<br/>