Köln 2004 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 11: Poster Session: Electromagnetic and Hadronic Probes
HK 11.3: Poster
Dienstag, 9. März 2004, 13:30–15:30, Foyer
Systematical Regge theory analysis of omega photoproduction — •Alexander Sibirtsev1, Siegfried Krewald1, and Kazuo Tsushima2 — 1IKP-TH, FZJ, Juelich. — 2Georgia University, USA
Systematic analysis of available data for ω-meson photoproduction is given in frame of Regge theory. At photon energies above 20 GeV the γ+p→ω+p reaction is entirely dominated by Pomeron exchange. However, it was found that Pomeron exchange model can not reproduce the γ+p→ρ+p and γ+p→ω+p data at high energies simultaneously with the same set of parameters. The comparison between ρ and ω data indicates a large room for meson exchange contribution to ω-meson photoproduction at low energies.
It was found that at low energies the dominant contribution comes from π and f2-meson exchanges. There is smooth transition between the meson exchange model at low energies and Regge theory at high energies. New systematic experimental results from CB-TAPS at ELSA and JLab are required for determination of dominant omega photoproduction mechanism at low energies.