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arXiv · 2603.10102

Kerr Black Hole Ringdown in Effective Field Theory

William L. Boyce·Jorge E. Santos
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Abstract

We develop a systematic effective field theory calculation of the quasinormal modes of Kerr black holes valid for arbitrary spin, providing model-independent corrections to their ringdown spectrum directly relevant for gravitational-wave observations. Close to extremality, the effective field theory corrections in the grand-canonical ensemble exhibit an oscillatory dependence on $\log \tau_{H}$, with $\tau_H \equiv T_H/\Omega_H$ a dimensionless measure of the black hole temperature. This behaviour signals an underlying discrete-scale-invariant structure.

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William L. Boyce, Jorge E. Santos. 2026-03-10. Kerr Black Hole Ringdown in Effective Field Theory. https://arxiv.org/abs/2603.10102

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