Measurement of C-Parameter and Determinations of alpha_s from C-Parameter and Jet Broadening at PETRA Energies

Details Measurement of C-Parameter and Determinations of alpha_s from C-Parameter and Jet Broadening at PETRA Energies Measurement of C-Parameter and Determinations of alpha_s from C-Parameter and Jet Broadening at PETRA Energies

1998-07-08

arxiv.org/abs/hep-ex/9807007v2

Physics

High Energy Physics

High Energy Physics - Experiment

17 pages, LaTeX2e, 11 .eps-files included, paper contributed to the ICHEP'98 conference in Vancouver, typo in stat. error of a

Scientific paper

e^+e^- annihilation data recorded by the JADE detector at PETRA were used to measure the C-parameter for the first time at sqrt{s}= 35 and 44 GeV. The distributions were compared to a resummed QCD calculation which recently became available for this observable. % In addition, we applied extended resummed calculations to the heavy and wide jet broadening variables, B_T and B_W, which now include a proper treatment of the quark recoil against multi-gluon emission with single-logarithmic accuracy. % We further investigated power corrections to the mean values of the observables mentioned above. In this study, we considered all available e^+e^- data between sqrt{s}= 35 and 172 GeV.

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