DOI: 10.1007/jhep06(2026)252 ISSN: 1029-8479
Scattering angle at 3PM in scalar-tensor theories using the PM-EFT formalism
Laura Bernard, Tamanna Jain, Stavros Mougiakakos
A
bstract
In this work, we derive the conservative dynamics of non-spinning binaries in the massless scalar-tensor theories using the post-Minkowskian Effective Field Theory (EFT) approach. Our main result is an analytic expression of the scattering angle, computed up to third Post-Minkowskian order via two-loop Feynman diagrams. Our results are in perfect agreement with previous literature, in particular within the post-Newtonian limit.