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Perturbative QCD Analysis of the Nucleon's Pauli Form Factor F_2(Q^2)
Andrei V. Belitsky, Xiangdong Ji, Feng Yuan
We perform a perturbative QCD analysis of the nucleon's Pauli form factor in the asymptotically large limit. We find that the leading contribution to ha…
Generalized Parton Distributions and the Spin Structure of the Nucleon
Xiangdong Ji
Generalized parton distributions are a new type of hadronic observables which has recently stimulated great interest among theorists and experimentalists alike. Introduced to delin…
Three-Quark Light-Cone Amplitudes of The Proton And Quark-Orbital-Motion Dependent Observables
Xiangdong Ji, Jian-Ping Ma, Feng Yuan
We study the three-quark light-cone amplitudes of the proton including quarks' transverse momenta. We classify these amplitudes using a newly-developed method in which light-cone w…
Final state interactions and gauge invariant parton distributions
A. V. Belitsky, X. Ji, F. Yuan
Parton distributions contain factorizable final state interaction effects originating from the fast-moving struck quark interacting with the target spectators in deeply inelastic s…
Delta --> N gamma in Large-Nc QCD
E. Jenkins, X. Ji, A. V. Manohar
The decay Delta^+ --> p gamma is studied in the 1/N_c expansion of QCD. The ratio of the helicity amplitudes is determined to be A_{3/2}/A_{1/2} = \sqrt{3} + O(1/N_c^2). Equivalent…
Parton Distributions in Light-Cone Gauge: Where Are the Final-State Interactions?
Xiangdong Ji, Feng Yuan
We show that the final-state interaction effects in the single target spin asymmetry discovered by Brodsky et al. can be reproduced by either a standard light-cone gauge definition…