The Next-to-Leading BFKL Pomeron with Optimal Renormalization

TL;DR

This paper discusses the NLO corrections to the BFKL equation with BLM scale setting, highlighting weak Q^2 dependence and good agreement with experimental data, suggesting approximate conformal symmetry.

Contribution

It introduces the application of NLO BFKL resummation with BLM scale setting and explores its implications for conformal symmetry and experimental data.

Findings

Weak Q^2 dependence of the Pomeron intercept

Good agreement with L3 gamma-gamma cross section data

Potential indication of approximate conformal symmetry

Abstract

The next-to-leading order (NLO) corrections to the BFKL equation in the BLM optimal scale setting are briefly discussed. A striking feature of the BLM approach is rather weak Q^2-dependence of the Pomeron intercept, which might indicate an approximate conformal symmetry of the equation. An application of the NLO BFKL resummation for the virtual gamma-gamma total cross section shows a good agreement with recent L3 data at the CERN LEP2.