Spin and orbital angular momentum in gauge theories (II): QCD and nucleon spin structure

Details Spin and orbital angular momentum in gauge theories (II): QCD and nucleon spin structure Spin and orbital angular momentum in gauge theories (II): QCD and nucleon spin structure

2007-09-09

arxiv.org/abs/0709.1284v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, no figure; presented by F. Wang at NSTAR2007

Scientific paper

Parallel to the construction of gauge invariant spin and orbital angular momentum for QED in paper (I) of this series, we present here an analogous but non-trivial solution for QCD. Explicitly gauge invariant spin and orbital angular momentum operators of quarks and gluons are obtained. This was previously thought to be an impossible task, and opens a more promising avenue towards the understanding of the nucleon spin structure.

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