Color gauge invariance in the Drell-Yan process

D Boer*, PJ Mulders

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

63 Citations (Scopus)

Abstract

We consider the color gauge invariance of a factorized description of the Drell-Yan process cross section, In particular, we focus on the next-to-leading twist contributions for polarized scattering and on the cross section differential in the transverse momentum of the lepton pair in the region where the transverse momentum is small compared to the hard scale. The hadron tensor is expressed in terms of manifestly color gauge invariant, non-local operator matrix elements and a color gauge invariant treatment of soft gluon poles is given. Also, we clarify the discrepancy between two published results for a single spin asymmetry in the Drell-Yan cross section. This asymmetry arises if such a soft gluon pole is present in a specific twist-three hadronic matrix element. (C) 2000 Elsevier Science B.V. All rights reserved.

Original languageEnglish
Pages (from-to)505-526
Number of pages22
JournalNuclear Physics B
Volume569
Issue number1-3
Publication statusPublished - 13-Mar-2000
Externally publishedYes

Keywords

  • TRANSVERSE SPIN ASYMMETRIES
  • HADRON-HADRON SCATTERING
  • ODD PARTON DISTRIBUTIONS
  • PERTURBATION-THEORY
  • POWER CORRECTIONS
  • COUNTER-EXAMPLE
  • CROSS-SECTION
  • FACTORIZATION

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