English

$\alpha_s$ 2002

High Energy Physics - Experiment 2011-03-23 v1 High Energy Physics - Phenomenology

Abstract

An update of measurements of the strong coupling constant αs\alpha_s is given, representing the status of September 2002. The results convincingly prove the energy dependence of αs\alpha_s and are in excellent agreement with the expectations of Quantum Chromodynamics, QCD. Evolving all results to the rest energy of the Z0Z^0 boson, the new world average of αs(MZ)\alpha_s(M_Z) is determined from measurements which are based on QCD calculations in complete NNLO perturbation theory, giving αs(MZ)=0.1183±0.0027. \alpha_s(M_Z) = 0.1183 \pm 0.0027 .

Keywords

Cite

@article{arxiv.hep-ex/0211012,
  title  = {$\alpha_s$ 2002},
  author = {Siegfried Bethke},
  journal= {arXiv preprint arXiv:hep-ex/0211012},
  year   = {2011}
}

Comments

Talk presented at the QCD 02 High-Energy Physics International Conference in Quantum Chromodynamics, Montpellier (France), July 2-9, 2002; 8 pages, 2 figures