Xiang Gao, Jinchen He, Yushan Su, Rui Zhang, Yong Zhao
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Comments on "Non-local Nucleon Matrix Elements in the Rest Frame"
In a recent paper, "Non-local Nucleon Matrix Elements in the Rest Frame"
(arXiv: 2407.16577), it was demonstrated that the next-to-leading order
perturbative theory can describe, to a few percent accuracy, the lattice QCD
static nucleon matrix elements of spatial correlators with separations up to
0.6~fm. We argue that perturbative QCD breaks down at such a distance scale
after resumming the associated large logarithms, while the ansatz used in the
analysis there did not account for resummation or the leading renormalon, both
of which significantly affect the convergence of perturbation theory. Besides,
we provide an explanation why the ansatz appears to describe the lattice data
despite the breakdown of perturbation theory at large distances.