Okubo-Zweig-Iizuka rule violation in photoproduction

Details Okubo-Zweig-Iizuka rule violation in photoproduction Okubo-Zweig-Iizuka rule violation in photoproduction

2005-03-29

arxiv.org/abs/hep-ph/0503276v3

Phys.Rev.D71:094011,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 4 PS figures, small modifications, version to appear in Phys. Rev. D (note: title changed in journal)

Scientific paper

10.1103/PhysRevD.71.094011

We investigate OZI rule violation in omega and phi-meson photoproduction off nucleons. Data on the total cross sections indicate a large phi/omega ratio of about 0.8 at the maximal available photon energy that is in good agreement with expectations from QCD. On the other hand, data at large four momentum transfer exhibit a ratio of about 0.07, showing that the perturbative QCD regime is not approached at |t| > 2 GeV^2 and photon energies E_\gamma < 4 GeV. The anomanously large phi/omega ratio at low energies, that is close to the reaction threshold, remains to be explained within nonperturbative QCD.

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