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Type: Journal article
Title: Okubo-Zweig-Iizuka rule violation in photoproduction
Author: Sibirtsev, A.
Meissner, U.
Thomas, A.
Citation: Physical Review D: Particles, Fields, Gravitation and Cosmology, 2005; 71(9):094011-1-094011-5
Publisher: American Physical Soc
Issue Date: 2005
ISSN: 1550-7998
Statement of
A. Sibirtsev, Ulf-G. Meißner, and A.W. Thomas
Abstract: We investigate OZI rule violation in ω and ϕ-meson photoproduction off nucleons. Data on the total cross sections indicate a large ϕ/ω 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  GeV2 and photon energies Eγ<4  GeV. The anomanously large ϕ/ω ratio at low energies, that is close to the reaction threshold, remains to be explained within nonperturbative QCD.
Rights: ©2005 American Physical Society
DOI: 10.1103/PhysRevD.71.094011
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