Charm photoproduction in perturbative QCD and in the quark-gluon string model

Journal Article · Tue Aug 01 04:00:00 EDT 1995 · Physics of Atomic Nuclei

OSTI ID:183379

Shabelski, Yu M ^[1]

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1. Petersburg Inst. of Nuclear Physics, Gatchina (Russian Federation)

The cross section for charm photoproduction at high energies is calculated in perturbative QCD and in the quark-gluon string model (QGSM). In the case of QCD, the role of absorptive corrections to parton structure functions is considered. It is shown that such corrections can significantly reduce the cross section for charm photoproduction at high energies and, especially, diminish the relative contribution of processes that are determined by the parton structure of photons. In the case of the QGSM, a significant contribution of the {open_quotes}intrinsic charm{close_quotes} in the photon is required in order to attain agreement with experimental data on the total cross section for charm photoproduction and on the shape of the D{sup 0}-meson spectrum. The relation between the contributions from various processes in perturbative QCD and in the QGSM is discussed. Predictions at HERA energies are made. 42 refs., 6 figs., 2 tabs.

• OSTI ID: 183379
• Journal Information: Physics of Atomic Nuclei, Journal Name: Physics of Atomic Nuclei Journal Issue: 8 Vol. 58; ISSN 1063-7788; ISSN PANUEO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CHARM PARTICLES
CROSS SECTIONS
HADRONS
PHOTONUCLEAR REACTIONS
PHOTOPRODUCTION
QUANTUM CHROMODYNAMICS
STRING MODELS