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arXiv · 2405.17255

Classifying post-Minkowskian geometries for gravitational waves via loop-by-loop Baikov

Hjalte Frellesvig·Roger Morales·Matthias Wilhelm
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Abstract

We use the loop-by-loop Baikov representation to investigate the geometries in Feynman integrals contributing to the classical dynamics of a black-hole two-body system in the post-Minkowskian expansion of general relativity. These geometries determine the spaces of functions to which the corresponding Feynman diagrams evaluate. As a proof of principle, we provide a full classification of the geometries appearing up to three loops, i.e. fourth post-Minkowskian order, for all diagrams relevant to the conservative as well as the dissipative dynamics, finding full agreement with the literature. Moreover, we show that the non-planar top topology at four loops, which is the most complicated sector with respect to integration-by-parts identities, has an algebraic leading singularity and thus can only depend on non-trivial geometries through its subsectors.

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Hjalte Frellesvig, Roger Morales, Matthias Wilhelm. 2024-05-27. Classifying post-Minkowskian geometries for gravitational waves via loop-by-loop Baikov. https://doi.org/10.1007/jhep08(2024)243

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