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Study of Baryon Resonances in the Photoproduction gamma p ---> K* Sigma(1190)
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In this talk, we report the theoretical studies of baryon resonances for the gamma p ---> K*0 Sigma+ and gamma p ---> K*+ Sigma0 reaction processes by making use of the effective Lagrangian method in the tree-level Born approximation. The numerical results for the total and differential cross sections are shown with the presently available data. It turns out that the contributions from the N* and Delta* resonances are almost negligible near the threshold energy. On the other hand, the effects of the K exchange in the t channel and Delta(1232) in the s channel are considerably larger than other ones in the scattering process, being in good agreement with the experimental data.
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Combined analysis of the data on cross sections and spin density matrix elements for $K^*\Sigma$ photoproduction reactions
Two equally good fits to K*Σ photoproduction data—one with and one without dominant κ exchange—show that the LEPS Pσ data do not uniquely require κ dominance.
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