On the Resummation of Singular Distributions in QCD Hard Scattering

Details On the Resummation of Singular Distributions in QCD Hard Scattering On the Resummation of Singular Distributions in QCD Hard Scattering

1996-04-03

arxiv.org/abs/hep-ph/9604234v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages LATEX, 2 figures

Scientific paper

We discuss the resummation of distributions that are singular at the elastic limit of partonic phase space (partonic threshold) in QCD hard-scattering cross sections, such as heavy quark production. We show how nonleading soft logarithms exponentiate in a manner that depends on the color structure within the underlying hard scattering. This result generalizes the resummation of threshold singularities for the Drell-Yan process, in which the hard scattering proceeds through color-singlet annihilation. We illustrate our results for the case of heavy quark production by light quark annihilation, and briefly discuss its extension to heavy quark production through gluon fusion.

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