Complete renormalization group improvement of QCD perturbation theory

Details Complete renormalization group improvement of QCD perturbation theory Complete renormalization group improvement of QCD perturbation theory

1998-09-04

arxiv.org/abs/hep-ph/9809270v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, no figures

Scientific paper

We suggest that at any given order of Feynman diagram calculation all renormalization group (RG)-predictable terms should be resummed to all-orders. This ``complete'' RG-improvement (CORGI) serves to separate the perturbation series into infinite subsets of terms which when summed are renormalization scheme (RS)-invariant. Crucially all ultraviolet logarithms involving the dimensionful parameter, Q, on which the observable depends are resummed, thereby building the correct Q-dependence. There are close connections with the effective charge approach of Grunberg.

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