2011/04/05 by D. Schildknecht, Dieter Schildknecht, Schildknecht, Dieter
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.1104.0850
11 pages, 4 figures
arxiv created 2011/04/05 · openalex publication_date 2011/04/05 · arxiv updated 2011/04/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The proton structure function in the diffraction region of small Bjorken-x and 10 \rm GeV2 ≤ Q2 ≤ 100 \rm GeV2 behaves as F2 (x, Q2) = F2 (W2) = f0 ⋅ (W2)C2, where x = Q2 / W2. The exponent C2 of the γ^* p center-of-mass energy squared, W2, is predicted from evolution of the flavor-singlet quark distribution, C2 = 0.29, and the only free parameter, the normalization f0 = 0.063, is fitted. The evolution of the gluon density multiplied by αs (Q2) is dentical to the evolution of the flavor-singlet quark density. This simple picture is at variance with the standard approach to evolution based on the coupled equations of flavor-singlet and gluon density.