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

被引:19
|
作者
An ChunSheng [1 ,2 ,3 ]
Zou BingSong [1 ,2 ,3 ]
机构
[1] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
[2] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China
[3] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
来源
SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY | 2009年 / 52卷 / 10期
基金
中国国家自然科学基金;
关键词
N*(1535); strong decays; five-quark components;
D O I
10.1007/s11433-009-0199-6
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The strong decays of the N*(1535) resonance are investigated in an extended chiral quark model by including the low-lying qqqq (q) over bar components in addition to the qqq component. The results show that these five-quark components in N*(1535) contribute significantly to the N*(1535) -> N pi and N*(1535) -> N eta decays. The contributions to the N eta decay come from both the lowest energy and the next-to-lowest energy five-quarks components, while the contributions to the N pi 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 N eta and N pi.
引用
收藏
页码:1452 / 1457
页数:6
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