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

1998/07/08 by P. A. Movilla Fernández, Fernández, P. A. Movilla, O. Biebel +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #hep-ex #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ex/9807007

17 pages, LaTeX2e, 11 .eps-files included, paper contributed to the ICHEP'98 conference in Vancouver, typo in stat. error of alpha_s(35 GeV) on p.5 corrected

arxiv created 1998/08/07 · arxiv updated 2009/11/30

Abstract

e⁺e^- annihilation data recorded by the JADE detector at PETRA were used to measure the C-parameter for the first time at sqrts= 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 sqrts= 35 and 172 GeV.

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