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arXiv · 2312.09960

Observables from the Spinning Eikonal

Andres Luna·Nathan Moynihan·Donal O'Connell·Alasdair Ross
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Abstract

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.

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Andres Luna, Nathan Moynihan, Donal O'Connell, Alasdair Ross. 2023-12-15. Observables from the Spinning Eikonal. https://doi.org/10.1007/jhep08(2024)045

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