Speaker
Oliver Long
Description
Recent advances in modelling unbound binary black hole interactions have been driven by the application of scattering amplitude methods to generate results within the post-Minkowskian (PM) expansion. However, this expansion breaks down when approaching the strong-field regime, where large curvature effects become non-negligible. In this talk, I will show how data from numerical relativity simulations and self-force (SF) calculations can be used as benchmarks to validate state-of-the-art PM expressions. Additionally, I will show how strong-field SF information can be used to resum the PM series, providing accurate predictions for scattering angles and radiative quantities across all separations.