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    Parametrized tidal dissipation numbers of nonrotating black holes

    Hajime Kobayashi1,*, Shinji Mukohyama1,2,3, Naritaka Oshita1,4,5, Kazufumi Takahashi6,1, and Vicharit Yingcharoenrat7,3

    • 1Center for Gravitational Physics and Quantum Information, Yukawa Institute for Theoretical Physics, Kyoto University, 606-8502, Kyoto, Japan
    • 2Research Center for the Early Universe (RESCEU), Graduate School of Science, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
    • 3Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study (UTIAS), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
    • 4The Hakubi Center for Advanced Research, Kyoto University, Yoshida Ushinomiyacho, Sakyo-ku, Kyoto 606-8501, Japan
    • 5RIKEN iTHEMS, Wako, Saitama, 351-0198, Japan
    • 6Department of Physics, College of Humanities and Sciences, Nihon University, Tokyo 156-8550, Japan
    • 7High Energy Physics Research Unit, Department of Physics, Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok 10330, Thailand

    • *Contact author: hajime.kobayashi@yukawa.kyoto-u.ac.jp

    Phys. Rev. D 112, 084061 – Published 23 October, 2025

    DOI: https://doi.org/10.1103/yclz-lbbs

    Abstract

    A set of tidal dissipation numbers (TDNs) quantifies the absorption of the tidal force exerted by a companion during an inspiralling phase of a binary compact object. This tidal dissipation generally affects the gravitational waveform, and measuring the TDNs of a black hole (BH) allows us to test the nature of gravity in the strong-field regime. In this paper, we develop a parametrized formalism for calculating the TDNs of static and spherically symmetric BH backgrounds using the Mano-Suzuki-Takasugi method, which connects the underlying perturbative equations with observable quantities in gravitational-wave observations in a theory-agnostic manner. Our formalism applies to any system where the master equation has the form of the Regge-Wheeler/Zerilli equation with a small correction to the effective potential. As an application of our formalism, we consider three examples: the effective field theory of BH perturbations with timelike scalar profile, the Einstein-Maxwell system, and a higher-curvature extension of general relativity. We also discuss the absence of logarithmic running for the TDNs.

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