Radiation reaction for spinning black-hole scattering

被引：47

作者：

Alessio, Francesco ^{[1
,2
,3
]}

Di Vecchia, Paolo ^{[1
,2
,4
]}

机构：

[1] KTH Royal Inst Technol, NORDITA, Hannes Alfvens Vag 12, SE-11419 Stockholm, Sweden

[2] Stockholm Univ, Hannes Alfvens Vag 12, SE-11419 Stockholm, Sweden

[3] Uppsala Univ, Dept Phys & Astron, Box 516, SE-75120 Uppsala, Sweden

[4] Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen, Denmark

来源：

PHYSICS LETTERS B | 2022年 / 832卷

关键词：

Scattering amplitudes; General relativity; Black-hole scattering;

D O I：

10.1016/j.physletb.2022.137258

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Starting from the leading soft term of the 5-point amplitude, involving a graviton and two Kerr black holes, that factorises into the product of the elastic amplitude without the graviton and the leading soft factor, we compute the infrared divergent contribution to the imaginary part of the two-loop eikonal. Then, using analyticity and crossing symmetry, we determine the radiative contribution to the real part of the two-loop eikonal and from it the radiative part of the deflection angle for spins aligned to the orbital angular momentum, the loss of angular momentum and the zero frequency limit of the energy spectrum for any spin and for any spin orientation. For spin one we find perfect agreement with recent results obtained with the supersymmetric worldline formalism. (C) 2022 The Author(s). Published by Elsevier B.V.

引用

页数：9

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