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Wilson lines and orbital angular momentum

Abstract : We present an explicit realization of the Chen et al. approach to the proton spin decomposition in terms of Wilson lines, generalizing the light-front gauge-invariant extensions discussed recently by Hatta. Particular attention is drawn to the residual gauge freedom by further separating the pure-gauge term into contour and residual terms. Contrarily to a recent claim, we show that the Wigner distributions do not give access to the kinetic orbital angular momentum. Finally, we confirm from twist-2 arguments that the advanced, retarded and antisymmetric light-front canonical orbital angular momenta are the same.
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Contributor : Sophie Heurteau <>
Submitted on : Wednesday, October 10, 2012 - 11:10:37 AM
Last modification on : Wednesday, September 16, 2020 - 4:08:15 PM

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C. Lorcé. Wilson lines and orbital angular momentum. Physics Letters B, Elsevier, 2012, B, pp.185-190. ⟨10.1016/j.physletb.2013.01.007⟩. ⟨in2p3-00740432⟩



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