Study of moments of event shapes in e+e- annihilation using JADE data

Details Study of moments of event shapes in e+e- annihilation using JADE data Study of moments of event shapes in e+e- annihilation using JADE data

2004-08-24

arxiv.org/abs/hep-ex/0408123v2

Physics

High Energy Physics

High Energy Physics - Experiment

JADE note 147 submitted as contributed paper to ICHEP 2004, corrected statistical error of 6 observable average and several ty

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. The data were compared with Monte Carlo models and with predictions from QCD NLO order calculations. The strong coupling constant measured from the moments is alpha_S(M_Z) = 0.1286 +/- 0.0007 (stat) +/- 0.0011 (expt) +/- 0.0022 (had) +/- 0.0068 (theo), alpha_S(M_Z) = 0.1286 +/- 0.0072 (total error), consistent with the world average. However, systematic deficiencies in the QCD NLO order predictions are visible for some of the higher moments.

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