Nucleon Form Factors and N-A Transitions in a Hypercentral Constituent Quark Model with Meson Cloud

作     者：CHEN Dina-Yong~(1,2) DONG Yu-Bing~(1,+)1 Institute of High Energy Physics,the Chinese Academy of Sciences,Beijing 100049,China2 Graduate School of the Chinese Academy of Sciences,Beijing 100049,China 

作者机构：Institute of High Energy Physics，the Chinese Academy of Sciences，Beijing 100049，China Graduate School of the Chinese Academy of Sciences，Beijing 100049，China Institute of High Energy Physics，the Chinese Academy of Sciences，Beijing 100049，China 

出 版 物：《Communications in Theoretical Physics》 (理论物理(英文版))

年 卷 期：2007年第3期

页      面：539-546页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China under Grant Nos.10475088 and 90103020 the CAS Knowledge Innovation Project under Grant No.KC2-SW-N02 the Institute of Theoretical Physics 

主　　题：electromagnetic form factor nucleon and △(1232) hypercentral constituent quark model meson cloud 

摘      要：We study the nucleon form factors and the nucleon-△(1232)transitions in a framework of hypercentralconstituent quark *** pion meson cloud effect is taken into account *** results show that the pioncloud contributes substantially to the nucleon form factors as well as to the helicity amplitudes of △(1232),and it givesan improved agreement compared to the experimental measurement.