Gravitational Bremsstrahlung from Reverse Unitarity.

@article{Herrmann2021GravitationalBF,
  title={Gravitational Bremsstrahlung from Reverse Unitarity.},
  author={Enrico Herrmann and Julio Parra-Martinez and Michael S. Ruf and Mao Zeng},
  journal={Physical review letters},
  year={2021},
  volume={126 20},
  pages={
          201602
        }
}
We compute the total radiated momentum carried by gravitational waves during the scattering of two spinless black holes at the lowest order in Newton's constant, O(G^{3}), and all orders in velocity. By analytic continuation into the bound state regime, we obtain the O(G^{3}) energy loss in elliptic orbits. This provides an essential step toward the complete understanding of the third-post-Minkowskian binary dynamics. We employ the formalism of Kosower, Maybee, and O'Connell (KMOC), which… 

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