Observables and amplitudes for spinning particles and black holes
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.
- Publication:
-
Journal of High Energy Physics
- Pub Date:
- December 2019
- DOI:
- 10.1007/JHEP12(2019)156
- arXiv:
- arXiv:1906.09260
- Bibcode:
- 2019JHEP...12..156M
- Keywords:
-
- Scattering Amplitudes;
- Black Holes;
- High Energy Physics - Theory;
- General Relativity and Quantum Cosmology
- E-Print:
- 32 pages