How Much of the Nucleon Spin is Carried by Glue?
arXiv:hep-ph/9702277 · doi:10.1103/PhysRevLett.79.1225
Abstract
We estimate in the QCD sum rule approach the amount of the nucleon spin carried by the gluon angular momentum: the sum of the gluon spin and orbital angular momenta. The result indicates that gluons contribute at least one half of the nucleon spin at scale of 1 GeV^2.
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