Analytic QCD coupling with no power terms in UV regime

Details Analytic QCD coupling with no power terms in UV regime Analytic QCD coupling with no power terms in UV regime

2009-12-13

arxiv.org/abs/0912.2466v2

J.Phys.G37:075001,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 5 figures, revised version (short changes in the text, Refs.[21,22,23] are new), version as it appears in J.Phys.G37

Scientific paper

10.1088/0954-3899/37/7/075001

We construct models of analytic QCD (i.e.,with the running coupling parameter free of Landau singularities) which address several problems encountered in previous analytic QCD models, among them their incompatibility with the ITEP-OPE philosophy (due to UV power terms) and too low values of the semihadronic tau decay ratio. The starting point of the approach is the construction of appropriate nonperturbative beta functions.

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