Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-12-03
J.Phys.Conf.Ser.295:012038,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
to appear in the proceedings of the 19th International Spin Physics Symposium (Spin2010), Sept.27 - Oct.2, 2010, Juelich, Germ
Scientific paper
10.1088/1742-6596/295/1/012038
Based on gauge-invariant decomposition of covariant angular momentum tensor of QCD in an arbitrary Lorentz frame, we investigate the relation between the known decompositions of the nucleon spin into its constituents, thereby clarifying in what respect they are common and in what respect they are different critically. We argue that the decomposition of Bashinsky and Jaffe, that of Chen et al., and that of Jaffe and Manohar are contained in our more general decomposition, after an appropriate gauge-fixing in a suitable Lorentz frame, which means that they all {\it gauge-equivalent}. We however point out that there is another gauge-invariant decomposition of the nucleon spin, which is closer to the Ji decomposition, while allowing the decomposition of the gluon total angular momentum into its spin and orbital parts. An advantage of the latter decomposition is that each of the four terms corresponds to a definite observable, which can be extracted from high-energy deep-inelastic-scattering measurements.
No associations
LandOfFree
Gauge-invariant decomposition of nucleon spin does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Gauge-invariant decomposition of nucleon spin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gauge-invariant decomposition of nucleon spin will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-513311