Extracting parton structure from lattice quantum chromodynamics (QCD) calculations requires studying the coordinate scale z3 dependence of the matrix elements of bilocal operators. The most significant contribution comes from the z3 dependence induced by ultraviolet (UV) renormalization of the Wilson line. We demonstrate that the next-to-leading order perturbative calculations of the renormalization factor can describe, to a few percent accuracy, the logarithm of the lattice QCD rest frame matrix elements with separations up to distances of 0.6~fm on multiple lattice spacings. The residual discrepancies can be modeled by a leading effect from the structure of the nucleon.
@article{arxiv.2407.16577,
title = {Non-local Nucleon Matrix Elements in the Rest Frame},
author = {Joe Karpie and Christopher Monahan and Anatoly Radyushkin},
journal= {arXiv preprint arXiv:2407.16577},
year = {2025}
}