Аннотация:Online ISSN 2050-3911; eISSN:ISSN 2050-3911, Oxword University Press;
We report the measurement of differential cross sections for ω and η′ photoproduction from protons at backward angles (−1.0<cosΘXC.M<−0.8) using linearly polarized photons at Eγ=1.5–3.0GeV. The differential cross sections for ω mesons are larger than the predicted u-channel contribution based on amplitude analysis in the energy range 2.0≤s√≤2.4GeV. The differential cross sections for ω and η′ mesons become closer to the predicted u-channel contribution at s√>2.4GeV. A bump structure in the s√ dependence of the differential cross sections for η′ mesons was observed at s√∼2.35GeV.