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Understanding the proton spin "puzzle" with a new "minimal" quark model
Ma, BQ; Schmidt, I; Yang, JJ; Ma, BQ , Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
2001
发表期刊EUROPEAN PHYSICAL JOURNAL A
ISSN1434-6001
卷号12期号:3页码:353-359
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".
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
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
学科领域Physics
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收录类别SCI
WOS记录号WOS:000173916800014
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被引频次:16[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13646
专题理论物理所1978-2010年知识产出
通讯作者Ma, BQ , Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
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Ma, BQ,Schmidt, I,Yang, JJ,et al. Understanding the proton spin "puzzle" with a new "minimal" quark model[J]. EUROPEAN PHYSICAL JOURNAL A,2001,12(3):353-359.
APA Ma, BQ,Schmidt, I,Yang, JJ,&Ma, BQ , Peking Univ, Dept Phys, Beijing 100871, Peoples R China..(2001).Understanding the proton spin "puzzle" with a new "minimal" quark model.EUROPEAN PHYSICAL JOURNAL A,12(3),353-359.
MLA Ma, BQ,et al."Understanding the proton spin "puzzle" with a new "minimal" quark model".EUROPEAN PHYSICAL JOURNAL A 12.3(2001):353-359.
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