198 citations · 722 across the 20 of their papers we have counts for
19 papers
Art of spin decomposition
Xiang-Song Chen, Wei-Min Sun, Fan Wang +1
We analyze the problem of spin decomposition for an interacting system from a natural perspective of constructing angular momentum eigenstates. We split, from the total angular mom…
Proper identification of the gluon spin
Xiang-Song Chen, Wei-Min Sun, Fan Wang +1
Properties of the recently proposed gauge-invariant gluon spin are studied and compared to the usually defined "gluon polarization" . By explicit 1-loop calculations in a…
A few brief comments to arXiv:1005.3315 and arXiv:1005.3321
V. Gogokhia
It is discussed the inconsistency of the so-called ladder-rainbow truncation scheme to QCD in the framework of the Dyson-Schwinger equation for the quark propagator and the Bethe-S…
Reply to the Comment of X. Ji on "Do gluons carry half of the nucleon momentum?" [PRL 103:062001 (2009)]
Xiang-Song Chen, Wei-Min Sun, Xiao-Fu Lü +2
We affirm that the proper momentum defined in [PRL 103:062001 (2009)] does respect exact gauge symmetry and is as measurable as the kinetic momentum. The physical part of the gauge…
Do gluons carry half of the nucleon momentum?
Xiang-Song Chen, Wei-Min Sun, Xiao-Fu Lü +2
We examine the conventional picture that gluons carry about half of the nucleon momentum in the asymptotic limit. We reveal that this large fraction is due to an unsuitable definit…
Reply to the Comment of X. Ji on "Spin and orbital angular momentum in gauge theories" [PRL 100:232002 (2008)]
Xiang-Song Chen, Xiao-Fu Lü, Wei-Min Sun +2
We reply to the Comment of X. Ji [arXiv:0810.4913] on our paper [PRL 100:232002 (2008)], concerning angular momentum algebra, locality, Lorentz covariance, and measurability of our…