SMuK 2023 – scientific programme
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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik
MP 7: Classical and Quantum Gravity
MP 7.4: Talk
Wednesday, March 22, 2023, 15:00–15:20, ZEU/0250
Wilson Line approach to gravitational scattering of spinning particles — Domenico Bonocore1, Anna Kulesza2, and •Johannes Pirsch2 — 1Theoretische Elementarteilchenphysik, TUM, München, Germany — 2Institut für Theoretische Physik, WWU Münster, Münster, Germany
Wilson lines provide a useful tool to reveal the all-order structure of scattering amplitudes. Recently it has been shown how a generalization that takes into account subleading eikonal effects (hence known as Generalized Wilson Line or GWL) clarifies the connection between the soft expansion in the Regge limit and the Post-Minkowskian expansion in the classical limit.
In this talk I will discuss the derivation of the spin 1/2 GWL starting from a N=1 supersymmetric worldline model. The resulting path integral expression exhibits a clear separation between purely classical and quantum contributions, which can conveniently be computed using Feynman diagrams in position space. Using this result, we are able to derive Low's soft theorem for off-shell gravitons and compute classical observables for spinning compact binaries.