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Radiation reaction for spinning black-hole scattering
Nordita SU.
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.ORCID iD: 0000-0002-7672-9688
2022 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 832, article id 137258Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
Elsevier BV , 2022. Vol. 832, article id 137258
Keywords [en]
Scattering amplitudes, General relativity, Black-hole scattering
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:kth:diva-318162DOI: 10.1016/j.physletb.2022.137258ISI: 000847214300006Scopus ID: 2-s2.0-85133266887OAI: oai:DiVA.org:kth-318162DiVA, id: diva2:1696421
Note

QC 20220916

Available from: 2022-09-16 Created: 2022-09-16 Last updated: 2022-09-16Bibliographically approved

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Di Vecchia, Paolo

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