Anikin, I. V. and Teryaev, O. V. (2015) Constraining gluon poles. PHYSICS LETTERS B, 751. pp. 495-499. ISSN 0370-2693, 1873-2445
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In this letter, we revise the QED gauge invariance for the hadron tensor of Drell-Yan type processes with the transversely polarized hadron. We perform our analysis within the Feynman gauge for gluons and make a comparison with the results obtained within the light-cone gauge. We demonstrate that QED gauge invariance leads, first, to the need of a non-standard diagram and, second, to the absence of gluon poles in the correlators <(psi) over bar gamma(perpendicular to)A(+)psi > related traditionally to dT(x, x)/dx. As a result, these terms disappear from the final QED gauge invariant hadron tensor. We also verify the absence of such poles by analyzing the corresponding light-cone Dirac algebra. (C) 2015 The Authors. Published by Elsevier B.V.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DRELL-YAN PROCESS; SINGLE SPIN; ASYMMETRIES; HADRONS; Factorization theorem; Gauge invariance; Drell-Yan process |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 29 Apr 2019 07:40 |
| Last Modified: | 29 Apr 2019 07:40 |
| URI: | https://pred.uni-regensburg.de/id/eprint/4279 |
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