Study of moments of event shapes and a determination of \as using \epem annihilation data from \Jade

Details Study of moments of event shapes and a determination of \as using \epem annihilation data from \Jade Study of moments of event shapes and a determination of \as using \epem annihilation data from \Jade

2008-10-16

arxiv.org/abs/0810.2933v2

Eur.Phys.J.C60:181-196,2009; Erratum-ibid.C62:451-452,2009

Physics

High Energy Physics

High Energy Physics - Experiment

14 pages, 9 figures, EPHJA style, acc. by Eur.Phys.J.C. New version similar to published version

Scientific paper

10.1140/epjc/s10052-009-0930-5 1

Data from \epem annihilation into hadrons, collected by the \Jade experiment at centre-of-mass energies between 14 GeV and 44 GeV, are used to study moments of event shape distributions. Models with hadronisation parameters tuned to the LEP 1 precision data provide an adequate description of the low energy data studied here. The NLO QCD calculations, however, show systematic deficiencies for some of the moments. The strong coupling measured from the moments which are reasonably described by NLO QCD, \asmz=0.1287\pm0.0007\stat\pm0.0011\expt\pm0.0022\had\pm0.0075\theo is consistent with the world average.

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