First NNLO QCD calculation for longitudinal DVπP cross sections and TSSAs shows positive substantial corrections that improve agreement with existing JLab data.
Chen, [arXiv:2505.13540 [hep-ph]]
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abstract
The AmpRed package has been updated with an improved method for analytic continuation of complex integrals. Compared to the previous version, the new implementation significantly enhances computational efficiency for evaluating complex integrals.
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hep-ph 2years
2026 2representative citing papers
AMFlow 2.0 cuts symbolic and numerical cost of multi-loop Feynman integral evaluation via an FT recursion mode, a C++ DE solver, and modern IBP reducers, demonstrated on a three-loop five-point family.
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Deeply virtual pion production through two-loop order
First NNLO QCD calculation for longitudinal DVπP cross sections and TSSAs shows positive substantial corrections that improve agreement with existing JLab data.
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AMFlow 2.0: significant algorithmic and software improvements for Feynman integral evaluation
AMFlow 2.0 cuts symbolic and numerical cost of multi-loop Feynman integral evaluation via an FT recursion mode, a C++ DE solver, and modern IBP reducers, demonstrated on a three-loop five-point family.