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Chiral Multiplets of Hadron Currents
Thomas D. Cohen, Xiangdong Ji
Using group theoretical methods, we enumerate possible chiral representations in which hadron interpolating currents can be classified. We give simple examples of currents in each…
Hunting for the Remaining Spin in the Nucleon
Xiangdong Ji
This talk consists of four parts. In part one, I give an elementary discussion on constructing a Lorentz-invariant spin sum rule for the nucleon. In part two, I discuss a gauge-dep…
Determination of flavor asymmetry for by the Drell-Yan process
Mary Alberg, Ernest M. Henley, Xiangdong Ji +1
Flavor asymmetries for the valence and sea quarks of the can be obtained from Drell-Yan experiments using charged hyperon beams on proton and deuteron targets. A large, m…
Deeply Virtual Compton Scattering
Xiangdong Ji
We study in QCD the physics of deeply-virtual Compton scattering (DVCS)---the virtual Compton process in the large s and small t kinematic region. We show that DVCS can probe a new…
Gauge-Invariant Decomposition of Nucleon Spin and Its Spin-Off
Xiangdong Ji
I introduce a gauge invariant decomposition of the nucleon spin into quark helicity, quark orbital, and gluon contributions. The total quark (and hence the quark orbital) contribut…