2002/10/30 by Xiangdong Ji, Jian-Ping Ma, Feng Yuan
Physics and Astronomy · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Quantum and Classical Electrodynamics #hep-ph
paper · pdf · doi:10.1016/s0550-3213(03)00010-5
published as Nucl.Phys. B652 (2003) 383-404 · 20 pages, no figure
arxiv created 2002/10/30 · openalex publication_date 2003/03/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
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 wave functions are constructed from a class of light-cone matrix elements. We derive the constraints on the amplitudes from parity and time-reversal symmetries. We use the amplitudes to calculate the physical observables which vanish when the quark orbital angular momentum is absent. These include transverse-momentum dependent parton distributions ΔqT(x, k_⊥), qT(x, k_⊥), δq(x, k_⊥), and δqL(x,k_⊥), twist-three parton distributions gT(x) and hL(x), helicity-flip generalized parton distributions E(x, ξ=0, Q2) and its associates, and the Pauli form factor F2(Q2).