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Pion form factor in QCD sum rules, local duality approach, and O(A_2) fractional analytic perturbation theory

Using the results on the electromagnetic pion Form Factor (FF) obtained in the $O(α_s)$ QCD sum rules with non-local condensates \cite{BPS09} we determine the effective continuum threshold for the local duality approach. Then we apply it to construct the $O(α_s^2)$ estimation of the pion FF in the framework of the fractional analytic perturbation theory.

preprint2009arXivOpen access
Alexander P. Bakulev
hep-ph
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Alexander P. Bakulev

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