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Mellin Moments of Proton Unpolarized GPDs at Nonzero Skewness from Lattice QCD with a Neural-Network Parametrization
We use lattice QCD to determine the generalized form factors (GFFs) entering the first four Mellin moments of the unpolarized isovector $u-d$ proton GPDs at nonzero skewness. The framework combines the polynomiality of the moments in the skewness $ξ$, with the short-distance expansion formalism, all
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