More on the relation between the two physically inequivalent
decompositions of the nucleon spin [PDF]
Masashi WakamatsuThe recent controversy on the nucleon spin decomposition problem is critically overviewed. We argue that there exist two and only two physically inequivalent gauge-invariant decompositions of the longitudinal nucleon spin, contrary to the rapidly spreading view in the QCD spin physics community that there are infinitely many decompositions of the nucleon spin.View original: http://arxiv.org/abs/1304.1589
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