Causality constraints on black holes beyond GR

0567314 - FZÚ 2023 RIV US eng J - Journal Article
Serra, F. - Serra, J. - Trincherini, E. - Trombetta, Leonardo G.
Causality constraints on black holes beyond GR.
Journal of High Energy Physics. Roč. 2022, č. 8 (2022), č. článku 157. ISSN 1029-8479. E-ISSN 1029-8479
R&D Projects: GA ČR(CZ) GA20-28525S
Institutional support: RVO:68378271
Keywords : black holes * effective field theories * scattering amplitudes
OECD category: Particles and field physics
Impact factor: 5.4, year: 2022
Method of publishing: Open access

We derive causality constraints on the simplest scalar-tensor theories in which black holes differ from what General Relativity predicts, a scalar coupled to the Gauss-Bonnet or the Chern-Simons terms. Demanding that time advances are unobservable within the regime of validity of these effective field theories, we find their cutoff must be parametrically of the same size as the inverse Schwarzschild radius of the black holes for which the non-standard effects are of order one. For astrophysical black holes within the range of current gravitational wave detectors, this means a cutoff length of the order of kilometers. We further explore the leading additional higher-dimensional operators potentially associated with the scale of UV completion and discuss their phenomenological implications for gravitational wave science.
Permanent Link: https://hdl.handle.net/11104/0338573