How Much of the Nucleon Spin is Carried by Glue?

Abstract

We 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 that gluons contribute at least one half of the nucleon spin at scale of 1 GeV^2.

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Cited by in corpus (25)

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• Helicity-dependent generalized parton distributions in constituent quark models
• Implications of Color Gauge Symmetry For Nucleon Spin Structure
• A Lattice Study of the Magnetic Moment and the Spin Structure of the Nucleon
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• ``Electromagnetic'' Contributrion to the Nucleon Spin
• The role of the GPD E in the determination of the parton angular momenta
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• Reflections on Chiral Symmetry within QCD
• Proton Spin Content From Lattice QCD
• Spin-1 quarkonia in a rotating frame and their spin contents
• Orbital Angular Momentum Parton Distributions in Light-Front Dynamics
• Series expansion of the quark determinant in the number of quark-antiquark pairs
• Glueball Spin
• The quark orbital angular momentum of ground state octet baryons
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