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arXiv · 2511.17145

Short-flow-time expansion of non-singlet twist-two operators at next-to-next-to-leading order QCD

Robert V. Harlander·Jonas T. Kohnen·Andrea Shindler
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Abstract

The gradient-flow formalism provides a framework for the direct determination of moments of parton distribution functions (PDFs) from lattice QCD calculations. Their conversion from the gradient-flow scheme to $\overline{\text{MS}}$ requires the matching coefficients of the short-flow-time expansion, which can be computed perturbatively. We determine these coefficients for the first six non-singlet PDF moments up to next-to-next-to-leading order in the strong coupling.

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Robert V. Harlander, Jonas T. Kohnen, Andrea Shindler. 2025-11-21. Short-flow-time expansion of non-singlet twist-two operators at next-to-next-to-leading order QCD. https://arxiv.org/abs/2511.17145

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