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Observables and amplitudes for spinning particles and black holes

MPS-Authors
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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
(Preprint), 396KB

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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: http://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.