Resummation in (F)APT

2008/03/20 by A. P. Bakulev, Bakulev, A. P., С. В. Михайлов +1 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.0803.3013

openalex publication_date 2008/03/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present new results on the summation of nonpower-series expansions in QCD Analytic Perturbation Theory (APT) in the one-loop approximation. We show how to generalize the approach suggested by one of us earlier to the cases of APT and Fractional APT (FAPT) with heavy-quark thresholds. Using this approach we analyze the Higgs boson decay H⁰→bb. We produce estimations of the higher-order corrections importance in (F)APT and present a very transparent interpretation of the resummation results in terms of Λ_QCD shifts.

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• Renormalon-based resummation for spacelike and timelike QCD quantities whose perturbation expansion has general form

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