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arXiv · 2208.11028

Scattering Angles in Kerr Metrics

Poul H. Damgaard·Jitze Hoogeveen·Andres Luna·Justin Vines
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Abstract

Scattering angles for probes in Kerr metrics are derived for scattering in the equatorial plane of the black hole. We use a method that naturally resums all orders in the spin of the Kerr black hole, thus facilitating comparisons with scattering-angle computations based on the Post-Minkowskian expansion from scattering amplitudes or worldline calculations. We extend these results to spinning black-hole probes up to and including second order in the probe spin and any order in the Post- Minkowskian expansion, for probe spins aligned with the Kerr spin. When truncating to third Post-Minkowskian order, our results agree with those obtained by amplitude and worldline methods.

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Poul H. Damgaard, Jitze Hoogeveen, Andres Luna, Justin Vines. 2022-08-23. Scattering Angles in Kerr Metrics. https://doi.org/10.1103/physrevd.106.124030

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