  We calculate the tidal corrections to the loss of angular momentum in a
two-body collision at leading Post-Minkowskian order from an amplitude-based
approach. The eikonal operator allows us to efficiently combine elastic and
inelastic amplitudes, and captures both the contributions due to genuine
gravitational-wave emissions and those due to the static gravitational field.
We calculate the former by harnessing powerful collider-physics techniques such
as reverse-unitarity, thereby reducing them to cut two-loop integrals, and
validate the result with an independent calculation in the Post-Newtonian
limit. For the latter, we can employ the results of arXiv:2203.11915 where
static-field effects were calculated for generic gravitational scattering
events using the leading soft graviton theorem.
