On gauge invariant nucleon spin decomposition

Details On gauge invariant nucleon spin decomposition On gauge invariant nucleon spin decomposition

2011-10-29

arxiv.org/abs/1110.6516v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, text improvement

Scientific paper

A non-uniqueness problem of gauge invariant separation of quark and gluon contributions to nucleon spin is considered. We show that there is a wide number of gauge invariant spin decompositions each of them reduces to the canonical one in a special gauge. A class of physical gauge equivalent nucleon spin decompositions is selected by requirements of consistence with helicity notion described within E(2) little group representation theory and with gluon helicity \Delta g measured in experiment.

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