Drell-Yan angular lepton distributions at small x from TMD factorization.

Balitsky, Ian

doi:10.1007/jhep09(2021)022

Title: Drell-Yan angular lepton distributions at small x from TMD factorization.

Abstract

The Drell-Yan process is studied in the framework of TMD factorization in the Sudakov region s » Q² » $ {q}_{\perp}^2 $ 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 $ \frac{1}{Q^2} $ and $ \frac{1}{N_c^2} $ accuracy. It is demonstrated that in the leading order in N_c 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^{\perp } $. 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 $ \frac{1}{N_c} $ so they appear to be relatively small in accordance with LHC results.

Authors:

Balitsky, Ian ^[1]

Old Dominion Univ., Norfolk, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Publication Date:: Mon Sep 06 00:00:00 EDT 2021

Research Org.:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP)

OSTI Identifier:: 1819085

Report Number(s):: JLAB-THY-21-3407; DOE/OR/23177-5225; arXiv:2105.13391
Journal ID: ISSN 1029-8479; TRN: US2214059

Grant/Contract Number:: AC05-06OR23177

Resource Type:: Accepted Manuscript

Journal Name:: Journal of High Energy Physics (Online)

Additional Journal Information:: Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2021; Journal Issue: 9; Journal ID: ISSN 1029-8479

Publisher:: Springer Nature

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; perturbative QCD; nonperturbative Effects

Citation Formats


                    Balitsky, Ian. Drell-Yan angular lepton distributions at small x from TMD factorization..  United States: N. p., 2021. 
Web.  doi:10.1007/jhep09(2021)022.

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                    Balitsky, Ian. Drell-Yan angular lepton distributions at small x from TMD factorization..  United States.  https://doi.org/10.1007/jhep09(2021)022

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                    Balitsky, Ian. Mon .  
"Drell-Yan angular lepton distributions at small x from TMD factorization.".  United States.  https://doi.org/10.1007/jhep09(2021)022.  https://www.osti.gov/servlets/purl/1819085.

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@article{osti_1819085,

  title        = {Drell-Yan angular lepton distributions at small x from TMD factorization.},

  author       = {Balitsky, Ian},

  abstractNote = {The Drell-Yan process is studied in the framework of TMD factorization in the Sudakov region s » Q2 » \( {q}_{\perp}^2 \) 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 \( \frac{1}{Q^2} \) and \( \frac{1}{N_c^2} \) 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 \( {h}_1^{\perp } \). 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 \( \frac{1}{N_c} \) so they appear to be relatively small in accordance with LHC results.},

  doi          = {10.1007/jhep09(2021)022},

  journal      = {Journal of High Energy Physics (Online)},

  number       = 9,

  volume       = 2021,

  place        = {United States},

  year         = {Mon Sep 06 00:00:00 EDT 2021},

  month        = {Mon Sep 06 00:00:00 EDT 2021}

}

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Title: Drell-Yan angular lepton distributions at small x from TMD factorization.

Abstract

Citation Formats

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