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Analytic QCD coupling with no power terms in UV regime

Dec, 2009

12 pages

Published in:

J.Phys.G 37 (2010) 075001

e-Print:

0912.2466 [hep-ph]

DOI:

10.1088/0954-3899/37/7/075001

Report number:

USM-TH-253

View in:

ADS Abstract Service

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Abstract: (arXiv)

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.

Note:

12 pages, 5 figures, revised version (short changes in the text, Refs.[21,22,23] are new), version as it appears in J.Phys.G37,075001

12.38.Aw
12.40.Vv
12.38.Cy
tau: decay
quantum chromodynamics
renormalization group
beta function: nonperturbative
singularity
operator product expansion
analytic properties

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Figures(5)

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