1998/12/21 by T. G. Steele, T. G. STEELE, V. Elias +1
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1142/s0217732398003351
published as Mod.Phys.Lett.A13:3151-3159,1998 · latex2e, 9 pages, 2 figures
openalex publication_date 1998/12/21 · arxiv created 1999/02/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The perturbative series used to extract α s (M τ ) from the τ hadronic width exhibits slow convergence. Asymptotic Padé-approximant and Padé summation techniques provide an estimate of these unknown higher-order effects, leading to values for α s (M τ ) that are about 10% smaller than current estimates. Such a reduction improves the agreement of α s (M τ ) with the QCD evolution of the strong coupling constant from α s (M z ).