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Contributions of qqqq(q)over-bar Components to Axial Charges of Proton and N(1440)
Yuan, SG; An CS(安春生); An, CS; He, J
2010
发表期刊COMMUNICATIONS IN THEORETICAL PHYSICS
卷号54期号:4页码:697-700
通讯作者[Yuan Si-Gang ; He Jun] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China ; [Yuan Si-Gang] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China ; [An Chun-Sheng] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
文章类型Article
摘要The axial charges of the proton and N(1440) are studied in the framework of an extended constituent quark model (CQM) including qqqq (q) over bar components. The cancellation between the contributions of qqq components and qqqq (q) over bar components gives a natural explanation to the experimental value of the proton axial charge, which can not be well reproduced in the traditional CQM even after the SU (6) circle times O(3) symmetry breaking is taken into account. The experimental value of axial charge pins down the proportion of the qqqq (q) over bar component in the proton to about 20%, which is consistent with the ones given by the strong decay widths and helicity amplitudes. Besides, an axial charge for N(1440) about 1 is predicted with 30% qqqq (q) over bar component, which is obtained by the strong and electromagnetic decays.
关键词axial charge five-quark component proton
学科领域Physics
研究领域[WOS]Physics ; Physics
DOI10.1088/0253-6102/54/4/22
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语种英语
研究领域[WOS]Physics ; Physics
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000282958300022
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/238297
专题理论物理室
作者单位中国科学院高能物理研究所
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GB/T 7714
Yuan, SG,An CS,An, CS,et al. Contributions of qqqq(q)over-bar Components to Axial Charges of Proton and N(1440)[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2010,54(4):697-700.
APA Yuan, SG,安春生,An, CS,&He, J.(2010).Contributions of qqqq(q)over-bar Components to Axial Charges of Proton and N(1440).COMMUNICATIONS IN THEORETICAL PHYSICS,54(4),697-700.
MLA Yuan, SG,et al."Contributions of qqqq(q)over-bar Components to Axial Charges of Proton and N(1440)".COMMUNICATIONS IN THEORETICAL PHYSICS 54.4(2010):697-700.
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