1.8k citations · 19.2k across the 204 of their papers we have counts for
6 papers · 1 filter
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…
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…
The Cryogenic System for the Panda-X Dark Matter Search Experiment
Zhao Li, Karl Ludwig Giboni, Haowei Gong +2
Panda-X is a liquid xenon dual-phase detector for the Dark Matter Search. The first modestly-sized module will soon be installed in the China JinPing Deep Underground Laboratory in…
Gluon Spin, Canonical Momentum, and Gauge Symmetry
Xiangdong Ji, Yang Xu, Yong Zhao
It is well known that in gauge theories, the spin (and orbital angular momentum) of gauge particles is not gauge invariant, although the helicity is; neither are the canonical mome…
Light dark matter and dark force at colliders
Haipeng An, Xiangdong Ji, Lian-Tao Wang
Light Dark Matter, GeV, with sizable direct detection rate is an interesting and less explored scenario. Collider searches can be very powerful, such as through the channel i…
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…