Phys. Rev. Lett. 78, 610–613 (1997)Gauge-Invariant Decomposition of Nucleon SpinReceived 20 March 1996; published in the issue dated 27 January 1997 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 measurable through virtual Compton scattering in a special kinematic region where single quark scattering dominates. This deeply virtual Compton scattering has much potential to unravel the quark and gluon structure of the nucleon. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.78.610
DOI:
10.1103/PhysRevLett.78.610
PACS:
13.88.+e, 12.38.Aw, 13.60.Hb, 14.20.Dh
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