The Logarithmic Derivative of the F_{2} Structure Function and Saturation

TL;DR

This paper demonstrates that including screening corrections aligns the derivative of the F2 structure function with pQCD expectations, clarifies the Caldwell plot, and concludes that saturation has not yet occurred at current HERA energies.

Contribution

It shows that screening corrections reconcile the F2 derivative with pQCD and clarifies the saturation status at HERA energies.

Findings

Screening corrections align F2 derivative with pQCD.

Saturation has not been reached at HERA energies.

Explains the Caldwell plot enigma.

Abstract

We show that when screening corrections are included $\frac{\partial F_{2}(x,Q^{2})}{\partial ln(Q^{2}/Q_{0}^{2})}$ is consistent with the behaviour that one expects in pQCD. Screening corrections explain the enigma of the Caldwell plot. Saturation has not been reached at present HERA energies.