Consistent gauge invariant nucleon spin decomposition
arXiv:1204.5030
Abstract
We consider a non-uniqueness problem of gauge invariant nucleon spin decomposition. A gauge invariant decomposition with a generalized Coulomb constraint for the physical gluon has been constructed. The decomposition scheme is consistent with the concept of helicity in non-Abelian gauge theory. We provide an explicit representation for the gauge invariant Abelian projection which implies further separation of gluon into binding and valence parts.
Talk given at XIV International Workshop on High Energy Physics "DSPIN-11", Dubna, Russia, September 20 - 24, 2011