Article (Scientific journals)
Wilson lines and orbital angular momentum
Lorce, Cédric
2013In Physics Letters B, B719, p. 185-190
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Abstract :
[en] 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. We show that the kinetic orbital angular momentum operator can be expressed in terms of the Wigner operator only when the momentum variable is integrated over. Finally, we confirm from twist-2 arguments that the advanced, retarded and antisymmetric light-front canonical orbital angular momenta are the same.
Disciplines :
Physics
Author, co-author :
Lorce, Cédric ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Physique des astroparticules
Language :
English
Title :
Wilson lines and orbital angular momentum
Publication date :
2013
Journal title :
Physics Letters B
ISSN :
0370-2693
eISSN :
1873-2445
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
B719
Pages :
185-190
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 30 November 2013

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