Description of F2 and FL at small x using a collinearly-improved BFKL resummation

TL;DR

This paper analyzes the structure functions F2 and FL at small x using an advanced collinearly-improved BFKL approach, providing detailed Q^2 and x dependence and predictions for future colliders.

Contribution

It introduces a collinearly-improved BFKL resummation at NLO with a novel treatment of the running coupling for small Q^2 analysis.

Findings

Accurate description of F2 and FL at small x and low Q^2

Predictions for future lepton-hadron collider experiments

Enhanced theoretical framework for small-x structure functions

Abstract

We present a detailed description of the Q^2 and x dependence of the structure functions F2 and FL as extracted from the Deep Inelastic Scattering data at HERA in the small Bjorken x region. Making use of a collinearly-improved BFKL equation at next-to-leading order and a treatment of the running of the coupling using non-Abelian physical renormalization together with the BLM scale choice allows us to reach low values of Q^2. We also provide some predictions for future lepton-hadron colliders.