Anomalous Contributions in Kaon photoproductions

Key words: 
• Kaon photoproduction /
• QCD anomaly

Abstract: We study kaon photoproduction from the nucleon. Using the photon beam asymmetry, we discuss the couplings of the K and K* mesons with baryons. In previous studies of photoproductions, the K* coupling strength has been treated as parameters to reproduce experimental data. Here instead we propose to use the coupling strength which is derived from a microscopic escription. By including a higher order loop contribution induced by the QCD anomaly, we demonstrate that the experimental data can be explained well. The use of a microscopic description enables us a better understanding of the reaction dynamics which provides further basis of hadron dynamics.