2010/11/25 by Mathias Butenschoen, Bernd A. Kniehl · 14 citations
Physics and Astronomy · #DESY #Fermilab #Formalism (music) #HERA #High-Energy Particle Collisions Research #Large Hadron Collider #Meson #Particle accelerator #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Tevatron #hep-ph
paper · pdf · doi:10.1063/1.3575045
published in AIP conference proceedings, 409-411 (American Institute of Physics) · 3 pages, 2 figures, to appear in the proceedings of "The IX International Conference on Quark Confinement and the Hadron Spectrum", Madrid, Spain, 30 August - 3 September 2010
arxiv created 2010/11/25 · openalex publication_date 2011/01/01 · arxiv updated 2011/07/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We report on our recent calculation of the inclusive direct photo- and hadroproduction of the J/psi meson at next-to-leading order within the factorization formalism of nonrelativistic QCD. We fit the color-octet (CO) long-distance matrix elements <O^(J/psi)(1S0[8])>, <O^(J/psi)(3S1[8])> and <O^(J/psi)(3P0[8])> to the transverse momentum (pT) distributions measured by CDF at Fermilab Tevatron and by H1 at DESY HERA and show that they also successfully describe the pT distributions from PHENIX at BNL RHIC and CMS at the CERN LHC as well as the photon-proton c.m. energy and (with worse agreement) the inelasticity distributions from H1. In all experiments, the CO processes are shown to be indispensable.