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题名: Proper identification of the gluon spin
作者: Chen, XS ;  Sun, WM ;  Wang, F ;  Goldman, T
刊名: PHYSICS LETTERS B
出版日期: 2011
卷号: 700, 期号:1, 页码:21-24
学科分类: Physics
通讯作者: Chen, XS (reprint author), Huazhong Univ Sci & Technol, Dept Phys, Wuhan 430074, Peoples R China.
部门归属: [Chen, Xiang-Song] Huazhong Univ Sci & Technol, Dept Phys, Wuhan 430074, Peoples R China; [Chen, Xiang-Song; Sun, Wei-Min; Wang, Fan] Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China; [Sun, Wei-Min; Wang, Fan] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China; [Sun, Wei-Min; Wang, Fan] Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Peoples R China; [Goldman, T.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA
英文摘要: Properties of the recently proposed gauge-invariant gluon spin S(g) are studied and compared to the usually defined "gluon polarization" Delta g. By explicit 1-loop calculations in a quark state. it is found that S(g) = 5/9 Delta g. Furthermore, 4/5 of S(g) can actually be identified as a "static-field" contribution and shown to cancel exactly an analogous static term in the gluon orbital angular momentum L(g), leaving S(g) + L(g) unaltered. These observations suggest that by an alternative definition, the gluon contribution to the nucleon spin may be drastically smaller than in the conventional wisdom. (C) 2011 Elsevier B.V. All rights reserved.
资助者: China NSF [10875082, 11035003]; US DOE [DE-AC52-06NA25396]; China Education Department
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000291578800005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14346
Appears in Collections:理论物理所2011年知识产出_期刊论文

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Recommended Citation:
Chen, XS,Sun, WM,Wang, F,et al. Proper identification of the gluon spin[J]. PHYSICS LETTERS B,2011,700(1):21-24.
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