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αs\alpha_s at Zinnowitz 2004

Abstract

A review of measurements of αs\alpha_s is given, representing the status of April 2004. The results 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 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)=0.1182±0.0027.\alpha_s(M_Z) = 0.1182 \pm 0.0027 .Comment: 8 pages, 4 figures, talk presented at the workshop Loops and Legs in Quantum Field Theory, April 2004, Zinnowitz (Germany

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