On Gauge Invariant Descriptions of Gluon Polarization [PDF]
Zhi-Qiang Guo, Ivan SchmidtWe propose methods to construct gauge invariant decompositions of nucleon spin, especially gauge invariant descriptions of gluon polarization. We show that gauge invariant decompositions of nucleon spin can be derived naturally from the conserved current of a generalized Lorentzian transformation by Noether theorem. We also examine the problem of gauge dependence with a gauge invariant extension of the Chern-Simons current.View original: http://arxiv.org/abs/1210.2263
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