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Lorentz Symmetry and the Internal Structure of the Nucleon
Xiangdong Ji
To investigate the internal structure of the nucleon, it is useful to introduce quantities that do not transform properly under Lorentz symmetry, such as the four-momentum of the q…
One-Loop QCD Corrections to Deeply Virtual Compton Scattering: The Parton Helicity-Independent Case
Xiangdong Ji, Jonathan Osborne
We show that the one-loop QCD correction to deeply-virtual Compton scattering can be factorized into the finite perturbative contributions and the collinearly-divergent terms, whic…
Purely-Nonperturbative Composite Operators and Parton Distributions
Xiangdong Ji
A class of purely-nonperturbative (PNP) composite operators is defined in Quantum Chromodynamics, which is perturbative scheme and scale independent and are useful to describe the…
Spin-Dependent Twist-Four Matrix Elements from g_1 Data in the Resonance Region
Xiangdong Ji, W. Melnitchouk
Matrix elements of spin-dependent twist-four operators are extracted from recent data on the spin-dependent g_1 structure function of the proton and deuteron in the resonance regio…
A Study of Off-Forward Parton Distributions
Xiangdong Ji, W. Melnitchouk, X. Song
An extensive theoretical analysis of off-forward parton distributions (OFPDs) is presented. The OFPDs and the form factors of the quark energy-momentum tensor are estimated at a lo…