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Complete twist-decomposition for non-local QCD vector operators in $x$-space

Joerg Eilers Bodo Geyer Markus Lazar
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Abstract

A general procedure is introduced allowing for the complete, infinite twist decomposition of non-local vector operators in QCD off the light-cone. The method is applied to the operators $\barψ(x) γ_μψ(-x)$ and $\barψ(x) σ_{μν} x^νψ(-x)$ as well as to their matrix elements thereby determining all power (resp. target mass) corrections being relevant for the related distribution amplitudes.

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Joerg Eilers Bodo Geyer Markus Lazar. 2003-06-27. Complete twist-decomposition for non-local QCD vector operators in $x$-space. https://arxiv.org/abs/hep-ph/0306269

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