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题名: Art of spin decomposition
作者: Chen, Xiang-Song1, 2; Sun, Wei-Min2, 3, 4; Wang, Fan2, 3, 4; Goldman, T.5
刊名: PHYSICAL REVIEW D
出版日期: 2011-04-05
卷号: 83, 期号:7
DOI: 10.1103/PhysRevD.83.071901
文章类型: Article
英文摘要: We analyze the problem of spin decomposition for an interacting system from a natural perspective of constructing angular-momentum eigenstates. We split, from the total angular-momentum operator, a proper part which can be separately conserved for a stationary state. This part commutes with the total Hamiltonian and thus specifies the quantum angular momentum. We first show how this can be done in a gauge-dependent way, by seeking a specific gauge in which part of the total angular-momentum operator vanishes identically. We then construct a gauge-invariant operator with the desired property. Our analysis clarifies what is the most pertinent choice among the various proposals for decomposing the nucleon spin. A similar analysis is performed for extracting a proper part from the total Hamiltonian to construct energy eigenstates.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics ; Physics, Particles & Fields
研究领域[WOS]: Astronomy & Astrophysics ; Physics
关键词[WOS]: NUCLEON
收录类别: SCI
语种: 英语
WOS记录号: WOS:000289193800001
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内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/15967
Appears in Collections:南极天文中心_期刊论文

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作者单位: 1.Huazhong Univ Sci & Technol, Dept Phys, Wuhan 430074, Peoples R China
2.Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China
3.Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
4.Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Peoples R China
5.Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA
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