Quark Orbital Motion in the Nucleon

Details Quark Orbital Motion in the Nucleon Quark Orbital Motion in the Nucleon

1998-01-17

arxiv.org/abs/hep-ph/9801332v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, Revtex, 3 tables

Scientific paper

An unified scheme for describing both spin and orbital motion in symmetry-breaking chiral quark model is suggested. The analytic results of the spin and orbital angular momenta carried by different quark flavors in the nucleon are given. The quark spin reduction due to spin-flip in the chiral splitting processes is compensated by the increase of the orbital angular momentum carried by the quarks and antiquarks. The sum of both spin and orbital angular momenta in the nucleon is 1/2, if the gluons and other degrees of freedom are neglected. The same conclusion holds for other octet and decuplet baryons. Possible modification and application are briefly discussed.

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