Small x resummation in collinear factorisation

Details Small x resummation in collinear factorisation Small x resummation in collinear factorisation

2009-10-28

arxiv.org/abs/0910.5443v2

Eur.Phys.J.C68:425-446,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

34 pages, 6 figures

Scientific paper

10.1140/epjc/s10052-010-1363-x

The summation of the small x-corrections to hard-scattering QCD amplitudes by collinear factorisation method is reconsidered and the K-factor is derived in leading ln x approximation with a result differing from the corresponding expression by Catani and Hautmann (Nucl. Phys. B 427, 475, 1994). The significance of the difference is demonstrated in the examples of structure function F_L and of exclusive vector meson electroproduction. The formulation covers the channels of non-vanishing conformal spin n paving the way for new applications.

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