The hard to soft Pomeron transition in small x DIS data using optimal renormalization

TL;DR

This paper demonstrates that the effective Pomeron intercept in small-x DIS data can be accurately modeled using NLO BFKL evolution with collinear improvements and an optimal renormalization scheme, covering a broad Q^2 range.

Contribution

It introduces a method combining NLO BFKL evolution, collinear improvements, and a non-Abelian physical renormalization scheme with BLM scale to describe small-x DIS data.

Findings

Successful description of the effective Pomeron intercept across Q^2 range

Use of a non-Abelian physical renormalization scheme with BLM scale

Incorporation of infrared parametrization of the running coupling

Abstract

We show that it is possible to describe the effective Pomeron intercept, determined from the HERA Deep Inelastic Scattering data at small values of Bjorken x, using next-to-leading order BFKL evolution together with collinear improvements. To obtain a good description over the whole range of Q^2 we use a non-Abelian physical renormalization scheme with BLM optimal scale, combined with a parametrization of the running coupling in the infrared region.