Single transverse-spin asymmetry in Drell-Yan production at large and moderate transverse momentum

2006/04/04 by Xiangdong Ji, Jian-Wei Qiu, Jianwei Qiu +2 · 8 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevd.73.094017

published as Phys.Rev.D73:094017,2006 · 29 pages, 10 figures

arxiv created 2006/04/04 · openalex publication_date 2006/05/19 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30

Abstract

We study the single-transverse-spin asymmetry for the Drell-Yan process. We consider production of the lepton pair at large transverse momentum, q_\ensuremath⊥\ensuremath∼Q, where Q is the pair's mass. The spin asymmetry is then of higher twist and may be generated by twist-three quark-gluon correlation functions. Expanding the result for q_\ensuremath⊥\ensuremath≪Q, we make contact with the transverse-momentum-dependent QCD factorization involving the so-called Sivers functions. We find that the two mechanisms, quark-gluon correlations on one hand and the Sivers effect on the other, contain the same physics in this region. This ties the two together and imposes an important constraint on phenomenological studies of single-transverse-spin asymmetries.

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• Probing the three-gluon correlation functions by the single spin asymmetry inp↑p→DX
• Testing the Time-Reversal Modified Universality of the Sivers Function
• Single transverse-spin asymmetries at largex
• Master formula for the three-gluon contribution to single spin asymmetry in semi-inclusive deep inelastic scattering