Angular Dependence ofϕMeson Production for Different Photon Beam Energies

The dependence of ϕ-meson photoproduction on the polar angle is investigated in the framework of a multisource thermal model. We present a detailed comparison between our results and experimental data of the neutral decay mode in the reaction γp→pϕ(KSKL). The results are in good agreement with the experimental data. It is found that the movement factor bz increases linearly with the photon beam energies