Using the BFKL resummation to fit DIS data: collinear and running coupling effects

TL;DR

This paper applies BFKL resummation with running coupling effects to fit low-x DIS data, improving theoretical accuracy and comparing results with HERA measurements.

Contribution

It introduces an all-orders resummation method to enhance collinear behavior in NLL BFKL analysis with running coupling effects.

Findings

Better fit to HERA data at low x

Reduced theoretical uncertainties

Improved collinear behavior in BFKL evolution

Abstract

The proton structure function F2 is studied in the low x regime using BFKL evolution. The next to leading logarithmic (NLL) analysis requires the inclusion of running coupling effects which lead to off-diagonal terms in the evolution kernel. An all-orders resummation is used to improve the collinear behavior of the NLL BFKL result. We emphasize the theoretical uncertainties that appear throughout the analysis and give a comparison to the combined HERA data.