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Universality of non-leading logarithmic contributions in transverse-momentum distributions

Authors
  • Catani, S.
  • de Florian, D.
  • Grazzini, M.
Type
Published Article
Publication Date
Oct 16, 2000
Submission Date
Aug 17, 2000
Identifiers
DOI: 10.1016/S0550-3213(00)00617-9
Source
arXiv
License
Unknown
External links

Abstract

We consider the resummation of the logarithmic contributions to the region of small transverse momenta in the distributions of high-mass systems (lepton pairs, vector bosons, Higgs particles, ....) produced in hadron collisions. We point out that the resummation formulae that are usually used to compute the distributions in perturbative QCD involve process-dependent form factors and coefficient functions. We present a new universal form of the resummed distribution, in which the dependence on the process is embodied in a single perturbative factor. The new form simplifies the calculation of non-leading logarithms at higher perturbative orders. It can also be useful to systematically implement process-independent non-perturbative effects in transverse-momentum distributions. We also comment on the dependence of these distributions on the factorization and renormalization scales.

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