Measurement of alpha_s with JADE using Moments of event shape observables and the Four-Jet Rate

Details Measurement of alpha_s with JADE using Moments of event shape observables and the Four-Jet Rate Measurement of alpha_s with JADE using Moments of event shape observables and the Four-Jet Rate

2005-12-02

arxiv.org/abs/hep-ex/0512004v1

PoS HEP2005:060,2006

Physics

High Energy Physics

High Energy Physics - Experiment

2 Figures, Contribution to EPS-HEP2005, Lisboa, July 2005

Scientific paper

Data from e+e-annihilation into hadrons collected by the JADE experiment at centre-of-mass energies between 14 GeV and 44 GeV were used to study moments of event shape distributions and the four-jet rate as a function of the Durham algorithm's resolution parameter y_cut. The data were compared to a QCD NLO order calculations and including NLLA resummation in the case of the four-jet rate. The strong coupling measured from the moments was alpha_s(M_Z)=0.1286+-0.0007(stat)+-0.0011(exp)+-0.0022(had)+-0.0068(theo) and from the four-jet rate was alpha_s(M_Z)=0.1169+-0.0004(stat)+-0.0012(exp)+-0.0021(had)+-0.0007(theo) both in agreement with the world average.

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