Observables and amplitudes for spinning particles and black holes

Maybee, Ben; O'Connell, Donal; Vines, Justin

doi:10.1007/JHEP12(2019)156

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Observables and amplitudes for spinning particles and black holes

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Vines, Justin
Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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1906.09260.pdf
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Citation

Maybee, B., O'Connell, D., & Vines, J. (2019). Observables and amplitudes for spinning particles and black holes. Journal of High Energy Physics, 2019(12): 156. doi:10.1007/JHEP12(2019)156.

Cite as: https://hdl.handle.net/21.11116/0000-0004-34E0-4

Abstract

We develop a general formalism for computing classical observables for
relativistic scattering of spinning particles, directly from on-shell
amplitudes. We then apply this formalism to minimally coupled Einstein-gravity
amplitudes for the scattering of massive spin 1/2 and spin 1 particles with a
massive scalar, constructed using the double copy. In doing so we reproduce
recent results at first post-Minkowskian order for the scattering of spinning
black holes, through quadrupolar order in the spin-multipole expansion.