Superradiance in string theory

Abstract We perform an extensive analysis of the statistics axion masses and interactions in compactifications type IIB string theory, we show that black hole superradiance excludes some regions Calabi-Yau moduli space. Regardless cosmological model, a theory with whose mass falls superradiant band can be probed by measured properties astrophysical holes, unless self-interaction is large enough to disrupt formation condensate. study ensemble on hypersurfaces, 1 ≤ h 1,1 491 closed axions, determine whether conditions self-interactions are fulfilled. The spectrum largely determined Kähler parameters, for mild assumptions about contributing instantons, takes nearly-universal form when ≫ 1. When taken at tip stretched cone, fraction geometries excluded initially grows , maximum ≈ 0.5 160, then larger . Further inside constraints far weaker, but 100 decay constants so small these may tension bounds, depending realization Standard Model.