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 t...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 description. 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.展开更多
基金Ministry of Education, Culture,Science and Technology,Japan(19540297)
文摘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 description. 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.
