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

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 res...

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Bibliographic Details
Published in:arXiv.org 1998-08
Main Authors: Movilla Fernández, P A, Biebel, O, Bethke, S, the JADE Collaboration
Format: Article
Language:English
Subjects:
Emission analysis
Mathematical analysis
Parameters
Recoil
Online Access:Get full text
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Summary: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.
ISSN:2331-8422