2002/07/08 by F. Bissey, J. R. Cudell, J. Cugnon +6 · 3 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:10.1016/s0370-2693(02)02775-2
published as Phys.Lett. B547 (2002) 210-218 · 14 pages, 6 figures, LaTeX, elsart class
arxiv created 2002/07/08 · openalex publication_date 2002/11/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/02
The pion structure function is investigated in a simple model, where pion and constituent quark fields are coupled through the simplest pseudoscalar coupling. The imaginary part of the forward γ★π→γ★π scattering amplitude is evaluated and related to the structure functions. It is shown that the introduction of non-perturbative effects, linked to the size of the pion and preserving gauge invariance, allows a connection with the quark distribution. It is predicted that higher-twist terms become negligible for Q2 larger than ∼2 GeV2 and that quarks in the pion have a momentum fraction smaller than in the proton case.