198 citations · 494 across the 4 of their papers we have counts for
4 papers
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 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…
Spin and orbital angular momentum in gauge theories (I): QED and determination of the angular momentum density
X. S. Chen, X. F. Lü, W. M. Sun +2
This two-paper series addresses and fixes the long-standing gauge invariance problem of angular momentum in gauge theories. This QED part reveals: 1) The spin and orbital angular m…