Scaling Violations in the $Q^2$ Logarithmic Derivative of $F_2$

Abstract

We examine the latest HERA experimental measurements of the $Q^2$ logarithmic derivative of the proton structure function. We analyze the characteristics of DGLAP with and without screening, as well as a Regge type model, and compare their predictions to all available data on $\slope$ including those for fixed W. Our results show that the present data can be described in pQCD taking into account shadowing corrections. However, such a description cannot be considered a conclusive signal of gluon saturation since the experimental data on $\slope$ do not allow one to discriminate between the various approaches, in spite of their very different construction.

arXiv comment15 pages, & figs in eps files

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Cited by in corpus (9)

• S-Matrix Unitarity, Impact Parameter Profiles, Gluon Saturation and High-Energy Scattering
• Nonlinear corrections to the DGLAP equations in view of the HERA data
• An approximate approach to the nonlinear DGLAP evaluation equation
• Shadowing correction to the gluon distribution behavior at small x
• Momentum Transfer Dependence of the Differential Cross Section for $J/\psi$ Production
• Has HERA reached a new QCD regime?
• The Logarithmic Slope in Diffractive DIS
• Small-x analysis on the effect of gluon recombinations inside hadrons in light of the GLR-MQ-ZRS equation
• A geometrical estimation of saturation of partonic densities