Strangeness Observables of the Proton and S11(1535) within Constituent Quark Model

• Main Authors: Hao-Chun Lee, 李浩君
• Other Authors: 楊信男
• Format: Others
• Language: en_US
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/93682544069180193497

碩士 === 國立臺灣大學 === 物理研究所 === 96 === Abstract We investigate the contribution of the strange five-quark component to the properties of the proton and , namely, the strange quarks’ contribution to the following properties: charge radius, spin, magnetic dipole moment, electric form factor, magnetic dipole form factor, and the axial form factor, with four different nonrelativistic constituent quark models. The four models we consider are of the cluster compositions of (3,2) and (4,1). For (3,2) clustering, we consider two possible configurations of (3,2), one -like and the other -like. For the (4,1) clustering, the two configurations considered are one with quark in S-wave and one with quark in P-wave. The two (4,1) configurations were previously studied by Riska and Zou. We improve their calculation by explicitly removing the CM motion in the model wave function. We also correct some errors in their results. We find that the -like (3,2) configuration can describe the strangeness properties of the proton as well as the (4,1) configuration with quark in S-wave.