Measurement of the Strong Coupling alpha_s from the Four-Jet Rate in e+e- Annihilation using JADE data

Abstract

Data from e+e- annihilation into hadrons collected by the JADE experiment at centre-of-mass energies between 14 GeV and 44 GeV are used to study the four-jet event production rate as a function of the Durham jet algorithm's resolution parameter ycut. The four-jet rate is compared to QCD next-to-leading order calculations including resummation of large logarithms in the next-to-leading logarithmic approximation. The strong coupling measured from the four-jet rate is as(MZ)=0.1159+-0.0004(stat)+-0.0012(expt)+-0.0024(had)+-0.0007(theo) in agreement with the world average.

21 pages, 19 figures. arXiv admin note: substantial text overlap with arXiv:hep-ex/0601048

References in corpus (1)

• A Determination of the Centre-of-Mass Energy at LEP2 using Radiative 2-fermion Events

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