Strong decays of N~*(1535) in an extended chiral quark model

作     者：AN ChunSheng1,2,3 & ZOU BingSong1,2,3 1 Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China 2 Theoretical Physics Center for Science Facilities,Chinese Academy of Sciences,Beijing 100049,China 3 Graduate University of Chinese Academy of Sciences,Beijing 100049,China 

作者机构：Institute of High Energy Physics Chinese Academy of Sciences Beijing China Theoretical Physics Center for Science Facilities Chinese Academy of Sciences Beijing China Graduate University of Chinese Academy of Sciences Beijing China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2009年第52卷第10期

页      面：1452-1457页

核心收录：

学科分类：07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos.10875133 and 10821063) the Chinese Academy of Sciences(Grant No.KJCX3-SYW-N2) 

主　　题：N*(1535) strong decays five-quark components 

摘      要：The strong decays of the N*(1535) resonance are investigated in an extended chiral quark model by including the low-lying $ qqqq\bar q $ components in addition to the qqq component. The results show that these five-quark components in N*(1535) contribute significantly to the N*(1535) → Nπ and N*(1535) → Nη decays. The contributions to the Nη decay come from both the lowest energy and the next-tolowest energy five-quarks components, while the contributions to the Nπ decay come from only the latter one. Taking these contributions into account, the description for the strong decays of N*(1535) is improved, especially for the puzzling large ratio of the decays to Nη and Nπ.