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- Title
Leading nonlinear tidal effects and scattering amplitudes.
- Authors
Bern, Zvi; Parra-Martinez, Julio; Roiban, Radu; Sawyer, Eric; Shen, Chia-Hsien
- Abstract
We present the two-body Hamiltonian and associated eikonal phase, to leading post-Minkowskian order, for infinitely many tidal deformations described by operators with arbitrary powers of the curvature tensor. Scattering amplitudes in momentum and position space provide systematic complementary approaches. For the tidal operators quadratic in curvature, which describe the linear response to an external gravitational field, we work out the leading post-Minkowskian contributions using a basis of operators with arbitrary numbers of derivatives which are in one-to-one correspondence with the worldline multipole operators. Explicit examples are used to show that the same techniques apply to both bodies interacting tidally with a spinning particle, for which we find the leading contributions from quadratic in curvature tidal operators with an arbitrary number of derivatives, and to effective field theory extensions of general relativity. We also note that the leading post-Minkowskian order contributions from higher-dimension operators manifest double-copy relations. Finally, we comment on the structure of higher-order corrections.
- Subjects
SCATTERING amplitude (Physics); MOMENTUM space; GRAVITATIONAL fields; PARTICLE spin; SALT marshes; CURVATURE
- Publication
Journal of High Energy Physics, 2021, Vol 2021, Issue 5, p1
- ISSN
1126-6708
- Publication type
Article
- DOI
10.1007/JHEP05(2021)188