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arXiv · hep-ph/9605375

Resummation of threshold corrections in QCD to power accuracy: the Drell-Yan cross section as a case study

M. Beneke·V. M. Braun
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Abstract

Resummation of large infrared logarithms in perturbation theory can, in certain circumstances, enhance the sensitivity to small gluon momenta and introduce spurious nonperturbative contributions. In particular, different procedures -- equivalent in perturbation theory -- to organize this resummation can differ by $1/Q$ power corrections. The question arises whether one can formulate resummation procedures that are explicitly consistent with the infrared behaviour of finite-order Feynman diagrams. We explain how this problem can be treated and resolved in Drell-Yan (lepton pair) production and briefly discuss more complicated cases, such as top quark production and event shape variables in the $e^+e^-$ annihilation.

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M. Beneke, V. M. Braun. 1996-05-22. Resummation of threshold corrections in QCD to power accuracy: the Drell-Yan cross section as a case study. https://doi.org/10.1016/s0920-5632(96)90028-6

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