期刊
PHYSICS LETTERS B
卷 708, 期 1-2, 页码 186-190出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2012.01.024
关键词
-
资金
- Ministry of Education, the Japanese Government
We discuss the orbital angular momentum of partons inside a longitudinally polarized proton in the recently proposed framework of spin decomposition. The quark orbital angular momentum defined by Ji can be decomposed into the 'canonical' and the 'potential' angular momentum parts, both of which are represented as the matrix element of a manifestly gauge invariant operator. (C) 2012 Elsevier B.V. All rights reserved.
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