2009/04/30 by Zhi-Guo He, Rong Li, Li Rong +1
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.79.094003
published as Phys.Rev.D79:094003,2009 · 14 pages, 6 figures, version accepted for publication in Phys Rev D
arxiv created 2009/05/04 · openalex publication_date 2009/05/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We calculate \ensuremathα2\ensuremathαs2 order QED contribution to J/\ensuremathψ production in the pp(p)\ensuremath→J/\ensuremathψ+cc color-singlet process at the Tevatron and LHC in the framework of nonrelativistic QCD. The contribution of the interference between the \ensuremathα2\ensuremathαs2 QED and \ensuremathαs4 QCD is also taken into account. The J/\ensuremathψ production associated with a charm-quark pair could be a measurable signal at hadron collider experiment. Our calculations show that by including the QED contribution, the pt distribution is enhanced by a factor of 1.5 (1.9) at the Tevatron (LHC) at pt=50(100) GeV. In addition, the polarization of J/\ensuremathψ turns from unpolarized in all regions to increasingly transverse when pt becomes larger.