Prompt J/ψ plus photon associated electroproduction at DESY HERA

2006/08/22 by Bernd A. Kniehl, Caesar P. Palisoc
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph

paper · pdf · doi:10.1140/epjc/s10052-006-0044-2

published as Eur.Phys.J.C48:451-456,2006 · 11 pages, 1 figure, to appear in Eur. Phys. J. C

arxiv created 2006/08/22 · openalex publication_date 2006/10/23 · arxiv updated 2011/03/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study the production of a prompt J/psi meson in association with a prompt photon in ep deep-inelastic scattering within the factorisation formalism of non-relativistic quantum chromodynamics (NRQCD) and demonstrate that this process provides a clean probe of the colour-octet mechanism at DESY HERA. Our analysis is based on an updated set of non-perturbative NRQCD matrix elements obtained through a joint fit to data on charmonium inclusive hadroproduction from runs I and II at the Fermilab Tevatron.

Citations

• Evidence for the Color-Octet Mechanism from CERN LEP2γγ→J/ψ+XData
• χc1andχc2decay angular distributions at the Fermilab Tevatron
• Study of inclusive J/ψ production in two-photon collisions at LEP II with the DELPHI detector
• Charmonium production in deep inelastic scattering at HERA
• Color-octet quarkonia production. II
• Prompt J/ψ production in charged-current deep-inelastic scattering
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)