Meson Cloud Effect on △(1232) Resonance Transition Properties with a Relativistic Quark Model Approach

作     者：DONG Yu-Bing FENG Qing-Guo 

作者机构：Institute of High Energy Physics Academia Sinica P.O. Box 9184-1 Beijing 100039 China Institute of High Energy Physics Academia Sinica P.O. Box 9184-1 Beijing 100039 China 

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

年 卷 期：2002年第38卷第7期

页      面：53-58页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：国家自然科学基金 中国科学院资助项目 教育部资助项目 中国科学院理论物理研究所资助项目 the Knowledge Innovation Probject Project of the Chinexe Academy of Sciences 

主　　题：relativistic quark model, △(1232), coupling constants, meson cloud, decay width 

摘      要：Based on a relativistic quark model approach, the transition properties of the first nucleon resonance △(1232), and the coupling constants gπNN, g△πN are investigated. Tvo different vays to remove the center of mass motion are considered. The results of the relativistic approaches with and without center ofmass correction are compared with those of nonrelativistic constituent quark model. Moreover, pion meson cloud effect on these calculated observables is explicitly addressed. Better results are obtained by taking the pion meson cloud into account.