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arXiv · 2207.08553

Renormalization of three-quark operators at two loops in the RI${}'$/SMOM scheme

Bernd A. Kniehl·Oleg L. Veretin
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Abstract

We consider the renormalization of the three-quark operators without derivatives at next-to-next-to-leading order in QCD perturbation theory at the symmetric subtraction point. This allows us to obtain conversion factors between the $\bar{\rm MS}$ scheme and the regularization invariant symmetric MOM (RI/SMOM, RI${}'$/SMOM) schemes. The results are presented both analytically in $R_\xi$ gauge in terms of a set of master integrals and numerically in Landau gauge. They can be used to reduce the errors in determinations of baryonic distribution amplitudes in lattice QCD simulations.

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Bernd A. Kniehl, Oleg L. Veretin. 2022-07-18. Renormalization of three-quark operators at two loops in the RI${}'$/SMOM scheme. https://doi.org/10.1016/j.nuclphysb.2023.116210

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