BFKL predictions at small x from k_T and collinear factorization viewpoints

Details BFKL predictions at small x from k_T and collinear factorization viewpoints BFKL predictions at small x from k_T and collinear factorization viewpoints

1995-04-06

arxiv.org/abs/hep-ph/9504247v1

Phys.Lett. B353 (1995) 123-130

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 LaTeX pages, 1 figure (uuencoded)

Scientific paper

10.1016/0370-2693(95)00564-2

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.

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