Study of the transition from the hard to the soft Pomeron in the small x region using optimal renormalization

TL;DR

This paper demonstrates that the effective Pomeron intercept at small x can be modeled using NLO BFKL evolution with collinear improvements and an optimized renormalization scheme, providing a comprehensive description across Q^2.

Contribution

It introduces a method combining NLO BFKL evolution, collinear improvements, and BLM optimal scale with infrared coupling parametrization for Pomeron analysis.

Findings

Effective Pomeron intercept described across Q^2 range

Use of non-Abelian physical renormalization scheme

Inclusion of infrared region coupling parametrization

Abstract

We show that it is possible to describe the effective Pomeron intercept using NLO BFKL evolution together with collinear improvements. In order 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.