期刊
PHYSICAL REVIEW D
卷 99, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.99.094039
关键词
-
资金
- National Natural Science Foundation of China [11675131]
The orbital angular momentum (L-q) of the proton is studied by employing the extended constituent quark model. Contributions from different flavors, namely, up, down, strange, and charm quarks in the proton are investigated. Probabilities of the intrinsic q (q) over bar pairs are calculated using a P-3(0) transition operator to fit the sea flavor asymmetry I-a = (d ) over bar - (u) over bar = 0.118 +/- 0.012 of the proton [1]. Our numerical results lead to L-q = 0.158 +/- 0.014, in agreement with 4/3I(a) = 0.157 +/- 0.016, and consistent with findings based on various other approaches.
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