Lu, MH (reprint author), Acad Sinica, Inst High Energy Phys, Beijing 100039, Peoples R China.
We analyse K-meson photoproduction off proton and its associated radiative capture process in Low Energy QCD Lagrangian. The two processes are related to each other by the Crossing Symmetry. In the framework of chiral quark model, we give a unified description of the two processes. Our theoretical prediction for branching ratio in radiative capture process is in good agreement with the experimental data.