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arXiv · 2401.07899

Calabi-Yau periods for black hole scattering in classical general relativity

Albrecht Klemm·Christoph Nega·Benjamin Sauer·Jan Plefka
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Abstract

The high-precision description of black hole scattering in classical general relativity using the post-Minkowskian (PM) expansion requires the evaluation of single-scale Feynman integrals at increasing loop orders. Up to 4PM, the scattering angle and the impulse are expressible in terms of polylogarithmic functions and Calabi-Yau (CY) two-fold periods. As in QFT, periods of higher dimensional CY n-folds are expected at higher PM order. We find at 5PM in the dissipative leading order self-force sector (5PM-1SF) that the only non-polylogarithmic functions are the K3 periods encountered before and the ones of a new hypergeometric CY three-fold. In the 5PM-2SF sector further CY two- and three-fold periods appear. Griffiths transversality of the CY period motives allows to transform the differential equations for the master integrals into $\epsilon$-factorized form and to solve them in terms of a well controlled function space, as we demonstrate in the 5PM-1SF sector.

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Albrecht Klemm, Christoph Nega, Benjamin Sauer, Jan Plefka. 2024-01-15. Calabi-Yau periods for black hole scattering in classical general relativity. https://arxiv.org/abs/2401.07899

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