187 citations · 992 across the 33 of their papers we have counts for
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hep-ph2012★ 48 cited
Transverse Polarization of the Nucleon in Parton Picture
Xiangdong Ji, Xiaonu Xiong, Feng Yuan
The proton's transverse polarization structure is examined in terms of the Lorentz-covariant Pauli-Lubanski vector in QCD. We find that there are contributions from leading, sublea…
hep-ph2012★ 62 cited
Probing Parton Orbital Angular Momentum in Longitudinally Polarized Nucleon
Xiangdong Ji, Xiaonu Xiong, Feng Yuan
While the total orbital angular momentum (OAM) of a definite quark flavor in a longitudinally-polarized nucleon can be obtained through a sum rule involving twist-two generalized p…
hep-ph2012★ 133 cited
Proton Spin Structure from Measurable Parton Distributions
Xiangdong Ji, Xiaonu Xiong, Feng Yuan
We present a systematic study of the proton spin structure in terms of measurable parton distributions. For a transversely-polarizedproton, we derive a polarization sum rule from t…