1996/09/30 by H. Weigel, Leonard Gamberg, L. Gamberg +2 · 1 citation
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.55.6910
published as Phys.Rev. D55 (1997) 6910-6923 · 31 pages REVTeX, 4 figures, comparison with low-scale parametrization added, to appear in Phys. Rev. D
arxiv created 1997/03/17 · openalex publication_date 1997/06/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study polarized-spin structure functions of the nucleon within the bosonized Nambu--Jona-Lasinio model where the nucleon emerges as a chiral soliton. We present the electromagnetic polarized structure functions g1(x) and g2(x) for ep scattering and discuss various sum rules in the valence quark approximation. This approximation is justified because in this model axial properties of the nucleon are dominated by their valence quark contributions. We find that these structure functions are well localized in the interval 0<~x<~1. We compare the model predictions on the polarized structure functions with data from the E143 experiment by evolving them from the scale characteristic of the NJL model to the scale of the data. Additionally, a comparison is made with parametrized data at a momentum scale commensurate with the model calculation.