An isobaric model for kaon photoproduction Original Research Article

The kaon photoproduction up to View the MathML source GeV is analyzed by an isobaric model based on effective Lagrangians. Both pseudovector and pseudoscalar coupling schemes for kaon–baryon–baryon (baryon spin =1/2) interactions are considered with form factors. A vector meson (K∗(890)), an axial-vector meson (View the MathML source), nucleon resonances (J⩽5/2), and hyperon resonances (J⩽3/2) are treated as participating particles. Coupling constants relevant to the particle, most of which are still unknown, are determined through a systematic fitting of the differential cross section, the total cross section, the single polarization observable, and the branching ratio in radiative kaon capture to their experimental data. Our model constructed this way reproduces all the experimental data well.