Analytic Perturbation Theory Model for QCD and Upsilon Decay

@inproceedings{Shirkov2006AnalyticPT,
  title={Analytic Perturbation Theory Model for QCD and Upsilon Decay},
  author={D. V. Shirkov},
  year={2006}
}
An elegant and more precise (Denominator) formula for the 3-loop perturbative QCD coupling is discussed. It improves the common expression (e.g., canonized by PDG) in few GeV region. On its base, we propose simple analytic Model for ghostfree QCD running couplings and their effective powers within the Analytic Perturbation Theory, in both the space-like (Euclidean) and time-like (Minkowskian) regions, very accurate in the range above 1 GeV. Effectiveness of the new Model is illustrated by the… CONTINUE READING