Gluon Saturation in the Colour Dipole Model?

2004/11/25 by J. R. Forshaw, G. Shaw, Graham Shaw
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1088/1126-6708/2004/12/052

published as JHEP0412:052,2004 · 15 pages, 4 figures

arxiv created 2004/11/25 · openalex publication_date 2004/12/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We use data on the deep inelastic structure function F₂ in order to constrain the cross-section for scattering a colour dipole off a proton. The data seem to prefer parameterisations which include saturation effects. That is they indicate that the strong rise with energy of the dipole cross-section, which holds for small dipoles, pertains only for r < r_s(x) where r_s(x) decreases monotonically as x decreases. Subsequent predicitions for the diffractive structure function F₂^D(3) also hint at saturation, although the data are not really sufficiently accurate.

Citations

• Proton structure function at smallQ 2
• Saturation effects in deep inelastic scattering at lowQ2and its implications on diffraction