Radiated Angular Momentum from Spinning Black Hole Scattering Trajectories
Abstract
Using the worldline quantum field theory approach we derive solutions to the equations of motion for spinning massive bodies up to quadratic order in spins. At leading post-Minkowskian (PM) order these trajectories are obtained in the time domain, and at sub-leading order in the frequency domain. Our approach incorporates diagrammatic techniques and modern Feynman integration technologies, and includes a new family of loop integrals different to those seen in asymptotic PM calculations. Our results provide a new mechanism for computing the radiated angular momentum involved in gravitational scattering, which we reproduce at 2PM order up to linear spins. We have established a framework for computing higher-order effects to further extend the high-precision frontier in analytical gravitational wave physics, and push predictions for the radiated angular momentum to higher perturbative orders.
Keywords
Cite
@article{arxiv.2506.20643,
title = {Radiated Angular Momentum from Spinning Black Hole Scattering Trajectories},
author = {Gustav Mogull and Jan Plefka and Kathrin Stoldt},
journal= {arXiv preprint arXiv:2506.20643},
year = {2026}
}
Comments
20 pages, 2 figures v3: Published version, Integrals in App C corrected. Accompanying Zenodo submission of ancillary file, see https://zenodo.org/records/17792608