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arXiv · 1607.08676

One-Loop Corrections of Single Spin Asymmetries at Twist-3 in Drell-Yan Processes

A. P. Chen·J. P. Ma·G. P. Zhang
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Abstract

We study single spin asymmetries at one-loop accuracy in Drell-Yan processes in which one of the initial hadrons is transversely polarized. The spin-dependent part of differential cross-sections can be factorized with various hadronic matrix elements of twist-2 and twist-3 operators. These operators can be of even- and odd-chirality. In this work, the studied observables of asymmetries are differential cross-sections with different weights. These weights are selected so that the observables are spin-dependent and their virtual corrections are completely determined by quark form factor. In the calculations of one-loop corrections we meet collinear divergences in the contributions involving chirality-odd and chirality-even operators. We find that all of the divergences can be correctly subtracted. Therefore, our results give an explicit example of QCD factorization with twist-3 operators, especially, QCD factorization with chirality-odd twist-3 operators.

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A. P. Chen, J. P. Ma, G. P. Zhang. 2016-07-29. One-Loop Corrections of Single Spin Asymmetries at Twist-3 in Drell-Yan Processes. https://doi.org/10.1103/physrevd.95.074005

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