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arXiv · 2407.12107

Massive two-loop four-point Feynman integrals at high energies with AsyInt

Hantian Zhang
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Abstract

We present analytic techniques for parametric integrations of massive two-loop four-point Feynman integrals at high energies, and their implementation in the toolbox AsyInt. In the high-energy region, the Feynman integrals involving external and internal massive particles, such as the top quark, Higgs and vector bosons, can be asymptotically expanded and directly calculated in the small-mass limit. With this approach, analytic results for higher-order terms in the expansion parameter and the dimensional regulator can be obtained with AsyInt. These results are important ingredients for the two-loop electroweak and QCD corrections for $2 \to 2$ scattering processes in the large transverse momenta region, which is relevant to both precision collider phenomenology and new physics searches at current and future high-energy colliders. In this paper, analytic results of representative planar and non-planar Feynman integrals are presented.

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Hantian Zhang. 2024-07-16. Massive two-loop four-point Feynman integrals at high energies with AsyInt. https://doi.org/10.1007/jhep09(2024)069

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