摘要
The study of nucleon resonance is an important topic in hadron physics. The most important way to studythe nucleon resonances is the collision of the photon and nucleon. Up to now, the knowledge about the nucleonresonances around 2 GeV is still scarce. Recently, the CLAS Collaboration at Jefferson National Accelerator Facilityreleased their exclusive photoproduction cross sections for the Λ(1520), Σ0(1385) and Λ(1405) for energies from nearthreshold up to a center of mass energy W of 2.85 GeV with large range of the K production angle[1]. Since thethreshold for the photoproduction of Λ(1520) is about 2.01 GeV, the new experimental data with high precisionreleased by the CLAS Collaboration provide an opportunity to study the nucleon resonances above 2 GeV.
基金
Major State Basic Research Development Program of China (2014CB845405), National Natural Science Foundationof China (11275235, 11035006) and Knowledge Innovation Project of Chinese Academy of Sciences(KJCX2-EW-N01).