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arXiv · 2112.02011

Polarized Gluon Pseudodistributions at Short Distances

Ian Balitsky·Wayne Morris·Anatoly Radyushkin
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Abstract

We formulate the basic points of the pseudo-PDF approach to the lattice calculation of polarized gluon PDFs. We present the results of our calculations of the one-loop corrections for the bilocal $G_{\mu \alpha}(z) \widetilde G_{\lambda \beta}(0)$ correlator of gluonic fields. Expressions are given for a general situation when all four indices are arbitrary, and also for specific combinations of indices corresponding to three matrix elements that contain the twist-2 invariant amplitude related to the polarized PDF. We study the evolution properties of these matrix elements, and derive matching relations between Euclidean and light-cone Ioffe-time distributions. These relations are necessary for extraction of the polarized gluon distributions from the lattice data.

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Ian Balitsky, Wayne Morris, Anatoly Radyushkin. 2021-12-03. Polarized Gluon Pseudodistributions at Short Distances. https://doi.org/10.1007/jhep02(2022)193

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