Author(s): Mathias Driesse, Gustav Uhre Jakobsen, Gustav Mogull, Christoph Nega, Jan Plefka, Benjamin Sauer, and Johann Usovitsch Using the worldline quantum field theory formalism, we compute conservative contributions to the scattering angle and impulse for classical black hole scattering at fifth post-Minkowskian and second self-force order. This four-loop calculation involves nonplanar Feynman integrals and requires advanc… [Phys. Rev. Lett. 137, 081402] Published Fri Aug 21, 2026