Document Type

Article

Publication Date

2021

DOI

10.1007/JHEP09(2021)022

Publication Title

Journal of High Energy Physics

Volume

2021

Issue

9

Pages

(22) 1-82

Abstract

The Drell-Yan process is studied in the framework of TMD factorization in the Sudakov region s » Q2 » q2⊥ corresponding to recent LHC experiments with Q2 of order of mass of Z-boson and transverse momentum of DY pair ∼ few tens GeV. The DY hadronic tensors are expressed in terms of quark and quark-gluon TMDs with 1Q2 and 1Nc2 accuracy. It is demonstrated that in the leading order in Nc the higher-twist quark-quark-gluon TMDs reduce to leading-twist TMDs due to QCD equation of motion. The resulting hadronic tensors depend on two leading-twist TMDs: f1 responsible for total DY cross section, and Boer-Mulders function h⊥1. The corresponding qualitative and semi-quantitative predictions seem to agree with LHC data on five angular coefficients A0 − A4 of DY pair production. The remaining three coefficients A5 − A7 are determined by quark-quark-gluon TMDs multiplied by extra 1Nc so they appear to be relatively small in accordance with LHC results.

Comments

© 2021 The Author.

This is the pre-print edition of an article to be published in Journal of High Energy Physics.

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author and source are credited.

Original Publication Citation

Balitsky, I. (2021). Drell-Yan angular lepton distributions at small x from TMD factorization. Journal of High Energy Physics, 2021(9), 1-82, Article 22. https://doi.org/10.1007/JHEP09(2021)022

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