Contribution of Orbital Angular Momentum to the Nucleon Spin

Abstract

We have calculated the Orbital Angular Momentum of quarks and gluons in the nucleon. The calculations are carried out in the next to leading order utilizing the so-called valon model. It is found that the average quark orbital angular momentum is positive, but small, and the average gluon orbital angular momentum is negative and large. We also report on some regularities about the total angular momentum of the quarks and the gluon, as well as on the orbital angular momentum of the separate partons. We have also provided partonic angular momentum, $L^{q,g}$ as a function of $Q^2$.

References in corpus (6)

• Reply to the Comment on "Spin and orbital angular momentum in gauge theories: Nucleon spin structure and multipole radiation revisited" [PRL 100:232002 (2008)]
• Spin and orbital angular momentum in gauge theories: Nucleon spin structure and multipole radiation revisited
• A Lattice Study of Quark and Glue Momenta and Angular Momenta in the Nucleon
• Gauge- and frame-independent decomposition of nucleon spin
• On the controversy concerning the definition of quark and gluon angular momentum
• Phenomenological analysis of the nucleon spin contents and their scale dependence