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Constructing Canonical Feynman Integrals with Intersection Theory

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arxiv 2008.03045 v2 pith:VRIWVWF4 submitted 2020-08-07 hep-th hep-ph

classification hep-thhep-ph
keywords integralscanonicalfeynmanintersectionmasterthemtheoryamplitudes
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Canonical Feynman integrals are of great interest in the study of scattering amplitudes at the multi-loop level. We propose to construct $d\log$-form integrals of the hypergeometric type, treat them as a representation of Feynman integrals, and project them into master integrals using intersection theory. This provides a constructive way to build canonical master integrals whose differential equations can be solved easily. We use our method to investigate both the maximally cut integrals and the uncut ones at one and two loops, and demonstrate its applicability in problems with multiple scales.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Analytic two-loop amplitudes for $q\bar{q}\to \gamma \gamma$ and $gg \to \gamma \gamma$ mediated by a heavy-quark loop

    hep-ph 2025-01 accept novelty 8.0 of 10

    The two-loop amplitudes for q qbar -> gamma gamma and gg -> gamma gamma with a heavy-quark loop are computed analytically in terms of elliptic iterated integrals, with validated fast series expansions for numerical ev...

  2. Notes on the bootstrap of four-point conformal integrals

    hep-th 2026-07 conditional novelty 6.0 of 10

    A leading-singularity bootstrap workflow yields new analytic expressions for four-loop conformal integrals, including previously intractable non-planar sectors.

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