Color-octet contributions to {ital J}{bold /{psi}} photoproduction
- Deutsches Elektronen-Synchrotron DESY, D-22603 Hamburg (Germany)
We have calculated the leading color-octet contributions to the production of {ital J}/{psi} particles in photon-proton collisions. Using the values for the color-octet matrix elements extracted from fits to prompt {ital J}/{psi} data at the Fermilab Tevatron, we demonstrate that distinctive color-octet signatures should be visible in {ital J}/{psi} photoproduction. However, these predictions appear at variance with recent experimental data obtained at HERA, indicating that the phenomenological importance of the color-octet contributions is smaller than expected from theoretical considerations and suggested by the Fermilab Tevatron fits. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 285735
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 22 Vol. 76; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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