THE CKMT Model and the Theoretical Description of the Caldwell-plot

TL;DR

This paper discusses the CKMT model for nucleon structure functions, compares it with a modified version including logarithmic Q^2 dependence, and analyzes its description of HERA data in Caldwell-plot representations.

Contribution

It provides a theoretical description of the CKMT model and its effectiveness in fitting HERA data, including a modified version with logarithmic Q^2 dependence.

Findings

CKMT model agrees well with HERA data at low and moderate Q^2

Modified model with logarithmic Q^2 dependence also fits data effectively

The model describes the behavior of F_2 in Caldwell-plot as the slopes vary with x and Q^2

Abstract

The CKMT model for the nucleon structure function F_2 is in good agreement with the HERA data at low and moderate Q^2. The fit to the same data obtained with a modified version of the model in which a logarithmic dependence on Q^2 has been included is also discussed. Finally, we show how the parametrization of the CKMT model for the nucleon structure function F_2 describes the HERA data when presented in the Caldwell-plot as the behavior of the logarithmic slopes of F_2 vs x and Q^2.