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How Much Of The Nucleon Spin Is Carried By Glue?, Ian Balitsky, Xiangdong Ji
How Much Of The Nucleon Spin Is Carried By Glue?, Ian Balitsky, Xiangdong Ji
Physics Faculty Publications
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 the scale of 1GeV2.