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- W2998953172 abstract "Using a short-distance collinear factorization, the pion valence quark distribution $q^pi_{rm v}(x)$ is extracted from spacelike correlations of antisymmetrized vector and axial-vector (V-A) currents, where the employed perturbative hard coefficient is derived to one-loop. Finite lattice spacing, volume, and quark mass dependencies are investigated in a simultaneous fit of matrix elements computed on four gauge ensembles, providing a physical limit Ioffe time distribution. Using two different phenomenologically motivated parametrizations of $q^pi_{rm v}(x)$, the $q^pi_{rm v}(x)$ distribution is found to be in very good agreement with that extracted from experimental data. At large $x$, a softer valence quark distribution is slightly favored by the figure of merit of this calculation. These two distributions are consistent within uncertainty and reproduce the extraction of $q^pi_{rm v}(x)$ from the experimental data in the entire $x$-region, showing the robustness of our calculation." @default.
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- W2998953172 date "2020-01-14" @default.
- W2998953172 modified "2023-09-28" @default.
- W2998953172 title "Pion Valence Quark Distribution at Large $x$ from Lattice QCD" @default.
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