Constraining strongly warped extra dimensions with rotating black holes
Year: 2026
Type: article
Abstract: Massive bosonic fields can trigger superradiant instabilities in rotating astrophysical black holes leading to gaps in their mass-spin distribution. For spin-2 fields, the instability timescale is orders of magnitude shorter than for any other superradiant mode, thereby yielding much stronger constraints. We consider a tower of ultralight spin-2 fields arising from a warped compactification of a single extra dimension and translate superradiant constraints on their masses into constraints on the warping. As a concrete scenario we consider the 2-brane Randall-Sundrum model and find constraints on the size of the extra dimension and the curvature of AdS 5 . We discuss the implications of these bounds for strongly warped throats and D-brane uplifts commonly used in attempts to realize metastable de Sitter vacua in string theory.
DOI: 10.1103/nspf-h6yw
Authors: Bruno Valeixo Bento, Miquel Salicrú Herberg
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W7106696012