198 citations · 416 across the 8 of their papers we have counts for
25 papers · 1 filter
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…
The application of gauge invariance and canonical quantization to the internal structure of gauge field systems
Fan Wang, X. S. Chen, X. F. Lu +2
It is unavoidable to deal with the quark and gluon momentum and angular momentum contributions to the nucleon momentum and spin in the study of nucleon internal structure. However,…
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…
Reply to the Comment on "Spin and orbital angular momentum in gauge theories: Nucleon spin structure and multipole radiation revisited" [PRL 100:232002 (2008)]
Xiang-Song Chen, Xiao-Fu Lü, Wei-Min Sun +2
This is a Reply to the Comment [arXiv:0807.0699] on our paper [PRL 100:232002 (2008)].
Spin and orbital angular momentum in gauge theories: Nucleon spin structure and multipole radiation revisited
Xiang-Song Chen, Xiao-Fu Lü, Wei-Min Sun +2
We address and solve the long-standing gauge-invariance problem of the nucleon spin structure. Explicitly gauge-invariant spin and orbital angular momentum operators of quarks and…