Study of Spin through Gluon Poles
I.V. Anikin, L. Szymanowski, O.V. Teryaev, N. Volchanskiy
TL;DR
This paper introduces a new method to measure single spin asymmetries in polarized Drell-Yan processes, emphasizing the role of gluon poles in twist-3 distributions using contour gauge and collinear factorization.
Contribution
It proposes a novel set of single spin asymmetries for polarized Drell-Yan processes based on gluon poles and twist-3 distributions, utilizing contour gauge and collinear factorization.
Findings
Identification of gluon poles as key to single transverse spin asymmetries
Proposal of measurable asymmetries in polarized Drell-Yan at SPD@NICA
Insight into twist-3 parton distributions and their role in spin phenomena
Abstract
Based on the use of contour gauge and collinear factorization, we propose a new set of single spin asymmetry which can be measured in polarized Drell-Yan process by SPD@NICA. We stress that the discussed single transverse spin asymmetries exist owing to the gluon poles manifesting in the twist-3 or twist-2twist-3 parton distributions related to the transverse-polarized Drell-Yan process.
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