Quark orbital-angular-momentum distribution in the nucleon

被引:46
作者
Hoodbhoy, P [1 ]
Ji, XD [1 ]
Lu, W [1 ]
机构
[1] Univ Maryland, Dept Phys, College Pk, MD 20742 USA
关键词
D O I
10.1103/PhysRevD.59.014013
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We introduce gauge-invariant quark and gluon angular momentum distributions after making a generalization of the angular momentum density operators. From the quark angular momentum distribution, we define the gauge-invariant and leading-twist quark orbital angular momentum distribution L-q(x). The latter can be extracted from data on the polarized and unpolarized quark distributions and the off-forward distribution E(x) in the forward limit. We comment upon the evolution equations obeyed by this as well as other orbital distributions considered in the literature. [S0556-2821(99)02501-1].
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页数:5
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