Calabi-Yau Feynman integrals in gravity: $\epsilon$-factorized form for apparent singularities

Abstract

We study a recently identified four-loop Feynman integral that contains a three-dimensional Calabi-Yau geometry and contributes to the scattering of black holes in classical gravity at fifth post-Minkowskian and second self-force order (5PM 2SF) in the conservative sector. In contrast to previously studied Calabi-Yau Feynman integrals, the higher-order differential equation that this integral satisfies in dimensional regularization exhibits $\epsilon$-dependent apparent singularities. We introduce an appropriate ansatz which allows us to bring such cases into an $\epsilon$-factorized form. As a proof of principle, we apply it to the integral at hand.

45 pages, 3 Figures, one ancillary file in Mathematica format; v2: corresponds to published version