$α_s$ at Zinnowitz 2004

Details $α_s$ at Zinnowitz 2004 $α_s$ at Zinnowitz 2004

2004-07-12

arxiv.org/abs/hep-ex/0407021v1

Nucl.Phys.Proc.Suppl.135:345-352,2004

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages, 4 figures, talk presented at the workshop Loops and Legs in Quantum Field Theory, April 2004, Zinnowitz (Germany)

Scientific paper

10.1016/j.nuclphysbps.2004.09.02

A review of measurements of $\alpha_s$ is given, representing the status of April 2004. The results prove the energy dependence of $\alpha_s$ and are in excellent agreement with the expectations of Quantum Chromodynamics, QCD. Evolving all results to the rest energy of the $Z^0$ boson, the world average of $\alpha_s(M_Z)$ is determined from measurements which are based on QCD calculations in complete NNLO perturbation theory, giving $\alpha_s(M_Z) = 0.1182 \pm 0.0027 .$

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