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题名: Understanding the proton spin "puzzle" with a new "minimal" quark model
作者: Ma, BQ ;  Schmidt, I ;  Yang, JJ
刊名: EUROPEAN PHYSICAL JOURNAL A
出版日期: 2001
卷号: 12, 期号:3, 页码:353-359
关键词: DEEP-INELASTIC-SCATTERING ;  ISOSPIN SYMMETRY-BREAKING ;  LIGHT-CONE REPRESENTATION ;  STRUCTURE-FUNCTION G1(X) ;  NN FORM-FACTOR ;  FLAVOR ASYMMETRY ;  MELOSH ROTATION ;  WAVE-FUNCTION ;  NUCLEON SEA ;  SUM-RULES
学科分类: Physics
通讯作者: Ma, BQ , Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
部门归属: Peking Univ, Dept Phys, Beijing 100871, Peoples R China; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China; Univ Tecn Federico Santa Maria, Dept Fis, Valparaiso, Chile; Nanjing Normal Univ, Dept Phys, Nanjing 210097, Peoples R China
英文摘要: We investigate the spin structure of the nucleon in an extended Jaffe-Lipkin quark model. In addition to the conventional 3q structure, different (3q)(Q (Q) over bar) admixtures in the nucleon wave function are also taken into account. The contributions to the nucleon spin from various components of the nucleon wave function are. discussed. The effect due to the Melosh-Wigner rotation is also studied. It is shown that the Jaffe-Lipkin term is only important when antiquarks are negatively polarized. We arrive at a new "minimal" quark model, which is close to the naive quark model, in order to understand the proton spin "puzzle".
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000173916800014
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13646
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Ma, BQ,Schmidt, I,Yang, JJ. Understanding the proton spin "puzzle" with a new "minimal" quark model[J]. EUROPEAN PHYSICAL JOURNAL A,2001,12(3):353-359.
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