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arXiv · 2601.17503

Scattering angle at 3PM in scalar-tensor theories using the PM-EFT formalism

Laura Bernard·Tamanna Jain·Stavros Mougiakakos
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Abstract

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.

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Laura Bernard, Tamanna Jain, Stavros Mougiakakos. 2026-01-24. Scattering angle at 3PM in scalar-tensor theories using the PM-EFT formalism. https://arxiv.org/abs/2601.17503

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