Abstract
The relations among differential cross section, polarization, helicity density-matrix element and joint decay helicity density-matrix element in γ + N → ps meson + baryon and ps meson + N → vector meson + baryon processes are given under photonvector-meson analogy model, utilizing the crossing relation in high-energy and smallangle approximation. The relation between differential cross sections of γN → πN 33 and πN → VN 33 processes is compared with the experimental results.
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