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Determination of αs from hadronic event shapes in e+e annihilation at 192≤√s≤208 GeV

ContributorsL3 Collaboration
Published inPhysics letters. B, vol. 536, no. 3-4, p. 217-228
Publication date2002
Abstract

Results are presented from a study of the structure of high energy hadronic events recorded by the L3 detector at √s≥192 GeV. The distributions of several event shape variables are compared to resumed O(αs2)QCD calculations. We determine the strong coupling constant at three average centre-of-mass energies: 194.4, 200.2 and 206.2 GeV. These measurements, combined with previous L3 measurements at lower energies, demonstrate the running of αs as expected in QCD and yield αs(mZ)=0.1227±0.0012±0.0058, where the first uncertainty is experimental and the second is theoretical.

Citation (ISO format)
L3 Collaboration. Determination of <em>α<sub>s</sub></em> from hadronic event shapes in e<sup>+</sup>e<sup>−</sup> annihilation at 192≤√s≤208 GeV. In: Physics letters. B, 2002, vol. 536, n° 3-4, p. 217–228. doi: 10.1016/S0370-2693(02)01814-2
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ISSN of the journal0370-2693
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