One-Loop Corrections of Single Spin Asymmetries at Twist-3 in Drell-Yan Processes
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.
Keywords
Cite
@article{arxiv.1607.08676,
title = {One-Loop Corrections of Single Spin Asymmetries at Twist-3 in Drell-Yan Processes},
author = {A. P. Chen and J. P. Ma and G. P. Zhang},
journal= {arXiv preprint arXiv:1607.08676},
year = {2017}
}
Comments
the representation of results is improved, published version