Leptoproduction of J/ψ

1998/10/26 by Thomas Mehen, Mehen, Thomas
Mathematics · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Markov Chains and Monte Carlo Methods #Mathematical Dynamics and Fractals #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/9810487

5 pages, 2 figures, Talk given at XXIX International Conference on High Energy Physics, Vancouver

arxiv created 1998/10/26 · openalex publication_date 1998/10/26 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

I review the status of the extraction of NRQCD color-octet J/ψ production matrix elements. Large theoretical uncertainties in current extractions from hadroproduction and photoproduction are emphasized. Leptoproduction of J/ψ is calculated within the NRQCD factorization formalism. Color-octet contributions dominate the cross section, allowing for a reliable extraction of and. A comparison with preliminary data from the H1 collaboration shows that leading order color-octet mechanisms agree with the measured total cross section for Q² > 4m_c², while the color-singlet model underpredicts the cross section by a factor of 5.

Related

• Color Octet Contribution to J/psi Photoproduction Asymmetries
• Photoproduction of ψ' as a Test of Color-Octet Model
• J/ψProduction in Direct and Resolved Photon Collisions
• Color-Octet Contribution to J/ψ Hadroproduction with Nonzero p_T at Fixed Target Energies
• Higher-Order Effects on Inelastic J/psi Photoproduction