Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-05-22
Nucl.Phys.Proc.Suppl. 51C (1996) 217-226
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, LATEX, requires sprocl.sty (included); To appear in the Proceedings of Second Workshop on Continuous Advances in QCD
Scientific paper
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.
Beneke Martin
Braun Vladimir M.
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