Photoproduction of charmonia and total charmonium-proton cross sections

J. Hüfner, Yu. P. Ivanov, B. Z. Kopeliovich, and A. V. Tarasov
Phys. Rev. D 62, 094022 – Published 9 October 2000
PDFExport Citation

Abstract

Elastic virtual photoproduction cross sections γ*pJ/ψ(ψ)p and total charmonium-nucleon cross sections for J/ψ,ψ, and χ states are calculated in a parameter-free way with the light-cone dipole formalism and the same input: factorization in impact parameters, light-cone wave functions for the γ* and the charmonia, and the universal phenomenological dipole cross section which is fitted to other data. The charmonium wave functions are calculated with four known realistic potentials, and two models for the dipole cross section are tested. Very good agreement with data for the cross section of charmonium photoproduction is found in a wide range of s and Q2. The inclusion of the Melosh spin rotation increases the ψ photoproduction rate by a factor of 2–3 and removes previously observed discrepancies in the ψ to J/ψ ratio in photoproduction. We also calculate the charmonium-proton cross sections whose absolute values and energy dependences are found to correlate strongly with the sizes of the states.

  • Received 20 July 2000

DOI:https://doi.org/10.1103/PhysRevD.62.094022

©2000 American Physical Society

Authors & Affiliations

J. Hüfner1,2, Yu. P. Ivanov1,2,3, B. Z. Kopeliovich2,3, and A. V. Tarasov1,2,3

  • 1Institut für Theoretische Physik der Universität, Philosophenweg 19, 69120 Heidelberg, Germany
  • 2Max-Planck Institut für Kernphysik, Postfach 103980, 69029 Heidelberg, Germany
  • 3Joint Institute for Nuclear Research, Dubna, 141980 Moscow Region, Russia

References (Subscription Required)

Click to Expand
Issue

Vol. 62, Iss. 9 — 1 November 2000

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×