Abstract

We investigate small-x resummation effects in QCD coefficient functions for Z 0 g and Wg fusion processes, and we compare them with the known ones of yg type. We find a strong process dependence that we argue to be due to the possible presence of collinear singularities for either small or large k of the exchanged gluon. For top quark production, we find that the gg → t t and Z 0g → t t channels have larger resummation enhancements than the Wg → t b one.

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