BFKL predictions at small x from k_T 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 ${\gamma }_{gg}$ and ${\gamma }_{qg}/{\alpha }_S$ are expressed as power series in ${\alpha }_S\log (1/x)$, or to be precise ${\alpha }_S/\omega$ where $\omega$ is the moment index. In particular we confront the collinear-factorization expansion with that extracted from the BFKL approach with running coupling included.

11 LaTeX pages, 1 figure (uuencoded)

References in corpus (3)

• High-Energy Factorization and Small-X Deep Inelastic Scattering Beyond Leading Order
• Properties of the BFKL equation and structure function predictions for HERA
• QCD Scaling Violation at Small x

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