BFKL predictions at small x from kT and collinear-factorization viewpoints

Abstract

Hard scattering processes involving hadrons at small x are described by a k t -factorization formula driven by a BFKL gluon. We explore the equivalence of this description to a collinear-factorization approach in which the anomalous dimensions γ gg and γ qg α s are expressed as power series in α s log( 1 x ) , or to be precise α s ω where ω is the moment index. In particular we confront the collinear-factorization expansion with that extracted from the BFKL approach with running coupling included.