Kaon Photoproduction Processes yp → K~+A and yn→ K~0 A from Thresholds up to W= 2.0 GeV

摘要

Kaon photoproduction processes yp → K~+ A and yn → K~0A have been investigated in the energy regime from threshold up to W= 2.0 GeV. The K~+A background amplitude is constructed from the appropriate Feynman diagrams. whilst the resonance terms were obtained by using the multipole approach. The observables for the K~0A channel are obtained by imposing the isospin symmetry to the K~+ A channel and using some experimental data on the helicity photon amplitudes for neutron obtained from the Particle Data Group. The observables used in the present investigation are the cross section and polarization observables. In the case of K~+ A channel, the agreement with the experiment data has been achieved. In the case of K~0A channel, the predicted observables indicate significant discrepancies with the prediction of Kaon-Maid.