Pade approximation to fixed order QCD calculations

Details Pade approximation to fixed order QCD calculations Pade approximation to fixed order QCD calculations

2001-02-21

arxiv.org/abs/hep-ph/0102266v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, latex, 4 figures (9 ps-files). Invited talk at the 5th International Symposium on Radiative Corrections (RADCOR-2000

Scientific paper

Pade approximations appear to be a powerful tool to extend the validity range of expansions around certain kinematical limits and to combine expansions of different limits to a single interpolating function. After a brief outline of the general method, we will review a number of recent applications and describe the modifications that have to be applied in each case. Among these applications are the MS-bar/on-shell conversion factor for quark masses and the top decay rate at NNLO in QCD.

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