Gluon spin in a quark model

@article{Barone1998GluonSI,
  title={Gluon spin in a quark model},
  author={Vincenzo Barone and Tommaso Calarco and Alessandro Drago},
  journal={Physics Letters B},
  year={1998},
  volume={431},
  pages={405-409}
}

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References

SHOWING 1-10 OF 10 REFERENCES

How much of the nucleon spin is carried by glue

The authors estimate in the QCD sum rule approach the amount of the nucleon spin carried by the gluon angular momentum: the sum of the gluon spin and orbital angular momenta. The result indicates

Gauge-Invariant Decomposition of Nucleon Spin

I introduce a gauge invariant decomposition of the nucleon spin into quark helicity, quark orbital, and gluon contributions. The total quark (and hence the quark orbital) contribution is shown to be

Spin structure of the nucleon in the asymptotic limit.

TLDR
An evolution equation for quark and gluon orbital angular momenta is derived for the nucleon spin using the QCD expression for the generators of Lorentz transformations as the theoretical basis for separating the spin of theucleon into different contributions.

Spin structure of the proton from polarized inclusive deep-inelastic muon-proton scattering

We have measured the spin-dependent structure function $g_1~p$ in inclusive deep-inelastic scattering of polarized muons off polarized protons, in the kinematic range $0.003 < x < 0.7$ and $1 GeV~2 <

The Electromagnetic shift of energy levels

B very beautiful experiments, Lamb and Retherford1 have shown that the fine structure of the second quantum state of hydrogen does not agree with the prediction of the Dirac theory. The 2s level,