Searching for Kerr in the 2PM amplitude

@article{Aoude2022SearchingFK,
  title={Searching for Kerr in the 2PM amplitude},
  author={Rafael Aoude and Kays Haddad and Andreas Helset},
  journal={Journal of High Energy Physics},
  year={2022}
}
Abstract The classical scattering of spinning objects is well described by the spinor-helicity formalism for heavy particles. Using these variables, we derive spurious-pole-free, all-spin opposite-helicity Compton amplitudes (factorizing on physical poles to the minimal, all-spin three-point amplitudes) in the classical limit for QED, QCD, and gravity. The cured amplitudes are subject to deformations by contact terms, the vast majority of whose contributions we can fix by imposing a relation… 

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