/ Phenomenology-HEP arXiv:0909.5544

Resummation in QCD Fractional Analytic Perturbation Theory

Bakulev, Alexander P. (Dubna, JINR)

Published in: Ukr.J.Phys.
Year: 2010
Vol.: 50
Page No: 15-19
Pages: 4

Abstract: We describe the generalization of Analytic Perturbation Theory (APT) for QCD observables, initiated by Radyushkin, Krasnikov, Pivovarov, Shirkov and Solovtsov, to fractional powers of coupling -- Fractional APT (FAPT). The basic aspects of FAPT is shortly summarized. We describe how to treat heavy-quark thresholds in FAPT and then show how to resum perturbative series in both the one-loop APT and FAPT. As an application we consider FAPT description of the Higgs boson decay $H^0\to b\bar{b}$. The main conclusion is: To achieve an accuracy of the order of 1% it is enough to take into account up to the third correction.

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Запись создана 2010-10-29, последняя модификация 2014-01-30

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