ω-Meson Photoproduction on Nucleons In the Near Threshold Region

الأصل · EN

The ω-meson photoproduction, γ+p→ p+ω, is studied in the framework of a model, containing π-meson exchange in t-channel and nucleon-exchange in s- and u-channels. Considering both ωNN-coupling constants in the region of time-like meson four momenta as the free parameters, we find different sets of solutions for these constants from the existing data on the t-dependence of the differential cross sections, dσ(γ+p→ p+ω)/dt, in the near threshold region Eγ≤ 2 GeV. These sets of ωNN-coupling constants, corresponding to destructive and constructive π N-interference contributions to dσ/dt can be well distinguished by measurements of beam asymmetry, induced by linear photon polarization.