2005/12/31 by F. Bissey, F. G. Cao, Fu‐Guang Cao +1
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevd.73.094008
published as Phys.Rev.D73:094008,2006 · 48 pages, 14 figures. New figure added and some previous figures amended. New references added and some amendments and additions to the text
arxiv created 2006/03/30 · openalex publication_date 2006/05/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We calculate the spin dependent structure functions g1(x) and g2(x) of the proton and neutron. Our calculation uses the meson cloud model of nucleon structure, which has previously given a good description of the HERMES data on polarized sea quark distributions, and includes all the leading contributions to spin dependent effects in this model. We find good agreement between our calculations and the current experimental data for the structure functions. We include in our calculations kinematic terms, which mix transverse and longitudinal spin components, for hadrons of spin 1/2, 1, and 3/2, and which can give considerable contributions to the g2 structure functions. We also consider the possible interference terms between baryons or mesons in different final states with the same quantum numbers, and show that most of these terms do not give leading contributions to the spin dependent structure functions.