4 papers
BREAKUP OF HADRON MASSES AND ENERGY-MOMENTUM TENSOR OF QCD
Xiangdong Ji
Hadron masses are shown to be separable in QCD into contributions of quark and gluon kinetic and potential energies, quark masses, and the trace anomaly. The separation is based on…
SOFFER'S INEQUALITY
Gary R. Goldstein, R. L. Jaffe, Xiangdong Ji
Various issues surrounding a recently proposed inequality among twist-two quark distributions in the nucleon are discussed. We provide a rigorous derivation of the inequality in QC…
Parton-Hadron Duality: Resonances and Higher Twists
Xiangdong Ji, Peter Unrau
We explore the physics of the parton-hadron duality in the nucleon structure functions appearing in lepton-nucleon scattering. We stress that the duality allows one to extract the…
Twist-Four Distributions in a Transversely-Polarized Nucleon and the Drell-Yan Process
Pevrez Hoodbhoy, Xiangdong Xi
The twist-four quark and gluon distributions in a transversely polarized nucleon are identified and relations among them are discussed by using QCD equations of motion. Their contr…