2004/02/02 by Matthias Burkardt · 2 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.69.091501
published as Phys.Rev. D69 (2004) 091501 · 4 pages, 1 figure, revtex
arxiv created 2004/02/02 · openalex publication_date 2004/05/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study T-odd gauge invariantly defined T-odd unintegrated gluon densities in QCD. The average \ensuremath⊥ momentum of the gluons in a \ensuremath⊥ polarized nucleon can be nonzero due to the Sivers mechanism. However, we find that the sum of the transverse momenta due to the Sivers mechanism from gluons and all quark flavors combined vanishes, i.e., 〈k_\mathbf\ensuremath⊥,g〉+\ensuremath∑q〈k_\mathbf\ensuremath⊥,q〉=0.