QCD factorization for twist-three axial-vector parton quasidistributions

Abstract

The transverse component of the axial-vector correlation function of quark fields is a natural starting object for lattice calculations of twist-3 nucleon parton distribution functions. In this work we derive the corresponding factorization expression in terms of twist-2 and twist-3 collinear distributions to one-loop accuracy. The results are presented both in position space, as the factorization theorem for Ioffe-time distributions, and in momentum space, for the axial-vector quasi- and pseudodistributions.

arXiv comment30 pages, 2 figures; v2: typos fixed, reference added matching published version

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• Higher Twists