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          Institute: MPI für Physik     Collection: MPI für Physik     Display Documents



ID: 543842.0, MPI für Physik / MPI für Physik
Measurement of the Strong Coupling alpha s from Four-Jet Observables in e+e- Annihilation
Authors:The OPAL Collaboration; Abbiendi, G.
Date of Publication (YYYY-MM-DD):2006
Title of Journal:European Physical Journal C
Journal Abbrev.:Eur.Phys.J.C
Issue / Number:47
Start Page:295
End Page:307
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:Data from e+e- annihilation into hadrons at centre-of-mass energies between 91 GeV and 209 GeV collected with the OPAL detector at LEP, are used to study the four-jet rate as a function of the Durham algorithm resolution parameter ycut. The four-jet rate is compared to next-to-leading order calculations that include the resummation of large logarithms. The strong coupling measured from the four-jet rate is alphas(Mz0)= 0.1182+-0.0003(stat.)+-0.0015(exp.)+-0.0011(had.)+-0.0012(scale)+-0.0013(mass) in agreement with the world average. Next-to-leading order fits to the D-parameter and thrust minor event-shape observables are also performed for the first time. We find consistent results, but with significantly larger theoretical uncertainties.
Classification / Thesaurus:OPAL
Comment of the Author/Creator:25 pages, 15 figures, Submitted to Euro. Phys. J. C
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2005-192
URL:http://www.slac.stanford.edu/spires/find/hep/www?r...
URL:http://arXiv.org/abs/hep-ex/0601048
URL:http://publications.mppmu.mpg.de/?action=search&mp...
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