Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-01-31
Phys.Rev.D84:041701,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages
Scientific paper
10.1103/PhysRevD.84.041701
Recently, X. Chen et al. proposed a new approach to the gauge invariant decomposition of the nucleon spin into helicity and orbital parts. The key ingredient in their construction is the separation of the gauge field into `physical' and `pure gauge' parts. We suggest a simple separation scheme and show that the resulting gluon helicity coincides with the first moment of the conventional polarized gluon distribution measurable in high energy experiments.
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