Observables from the spinning eikonal

doi:10.1007/JHEP08(2024)045

Observables from the spinning eikonal

2024-08-06

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DOI：10.1007/JHEP08(2024)045

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Abstract

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We study the classical dynamics of spinning particles using scattering amplitudes and eikonal exponentiation. We show that observables are determined by a simple algorithm. A wealth of complexity arises in perturbation theory as positions, momenta and spins must be iteratively corrected at each order. Even though we restrict ourselves to one-loop computations at quadratic order in spin, nevertheless we encounter and resolve a number of subtle effects. Finally, we clarify the links between our work and various other eikonal approaches to spinning observables.

Keywords:

Scattering Amplitudes

Classical Theories of Gravity

Effective Field Theories

Observables from the spinning eikonal

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