Pion structure: from nonlocal condensates to NLO analytic perturbation theory

2004/09/15 by N. G. Stefanis, Stefanis, N. G., A. P. Bakulev +8
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/0409176

9 pages, 4 figures consisting of 6 eps files. Needs hsqcd.cls. Invited plenary talk presented by the first author at Hadron Structure and QCD: from Low to High Energies, St. Petersburg, Repino, Russia, 18-22 May 2004

arxiv created 2004/09/15 · openalex publication_date 2004/09/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

A pion distribution amplitude, derived from nonlocal QCD sum rules, has been employed to calculate F_γ^*γ→π(Q²) using light-cone sum rules, and F_π(Q²) in NLO QCD perturbation theory. Predictions are presented for both observables and found to be in good agreement with the corresponding data. Calculating the hard pion form factor by Analytic Perturbation Theory to two-loop order, it is shown that the renormalization-scheme and scale-setting dependencies are diminished.

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