1997/04/30 by P. Závada, P. Zavada · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.56.5834
published as Phys.Rev. D56 (1997) 5834-5838 · 10 pages, Tex, 1 PostScript figure. In the revised version some references are added and minor corrections are done. This version will appear in Phys. Rev. D
arxiv created 1997/08/12 · openalex publication_date 1997/11/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
It is shown that the quark-parton model in the standard infinite momentum approach overestimates the proton spin structure function g1(x) in comparison with the approach taking consistently into account the internal motion of quarks described by a spherical phase space in the proton rest frame. Particularly, it is shown the first moment of the spin structure function in the latter approach, assuming only the valence quarks contribution to the proton spin, does not contradict the experimental data.