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GR: Fachverband Gravitation und Relativitätstheorie
GR 17: Gravitational Waves II
GR 17.3: Vortrag
Donnerstag, 14. März 2024, 16:25–16:45, HBR 14: HS 2
Gravitational scattering with Spinning Generalized Wilson Line operators — Domenico Bonocore1, Anna Kulesza2, and •Johannes Pirsch2 — 1Theoretische Elementarteilchenphysik, TUM, München, Germany — 2Institut für Theoretische Physik, WWU Münster, Münster, Germany
Due to the close connection between the classical limit and Regge limit of scattering amplitudes, Wilson Line operators are efficient building blocks of gravitational scattering amplitudes in the classical limit. At higher orders in the Post-Minkowskian expansion subleading corrections to the Wilson- Line operators become relevant and can be computed systematically from a first quantized point particle worldline model.
In this talk I will present the main ideas behind this approach and focus particularly on the implementation of spin in the worldline model. It is well known from the worldline approach to QFT and resummation techniques in QCD that spinning particles can be described by supersymmetric worldline actions, where the spinning degrees of freedom are described by Grassmann valued fields. The resulting path integral expression exhibits a clear separation between classical and quantum contributions to the scattering amplitude. This allows for the efficient calculation of classical observables for scattering of spinning compact astrophysical objects.
Keywords: Two-body problem; Worldline; Amplitudes; Spin; SUSY