Radiation eikonal for post-Minkowskian observables

Abstract

A recent proposal reinterprets the eikonal as the scattering generator, which computes scattering observables through an action as a symmetry generator. The aim of this study is to incorporate dissipative effects from radiation into this framework, where the eikonal is generalised to the radiation eikonal by including mediator field degrees of freedom. The proposed generalisation is tested through several post-Minkowskian scattering observables; scattering waveform, radiated momentum, and (time asymmetric) radiation loss in the impulse.

v2) expanded discussions on spin (footnote [59]) and added references. a new section "Motivating the radiation eikonal" and minor improvements for clarity. 8 pages, 4 figures; v1) 7 pages, 4 figures