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



ID: 543882.0, MPI für Physik / MPI für Physik
Determination of alpha_s using Jet Rates at LEP with the OPAL detector
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:45
Start Page:547
End Page:568
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:Hadronic events produced in e+e- collisions by the LEP collider and recorded by the OPAL detector were used to form distributions based on the number of reconstructed jets. The data were collected between 1995 and 2000 and correspond to energies of 91 GeV, 130-136 GeV and 161-209 GeV. The jet rates were determined using four different jet-finding algorithms (Cone, JADE, Durham and Cambridge). The differential two-jet rate and the average jet rate with the Durham and Cambridge algorithms were used to measure alpha(s) in the LEP energy range by fitting an expression in which order alpah_2s calculations were matched to a NLLA prediction and fitted to the data. Combining the measurements at different centre-of-mass energies, the value of alpha_s (Mz) was determined to be alpha(s)(Mz)=0.1177+-0.0006(stat.)+-0.0012$(expt.)+-0.0010(had.)+-0.0032(theo.) \.
Classification / Thesaurus:OPAL
Comment of the Author/Creator:40 pages, 17 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-2005-186
URL:http://www.slac.stanford.edu/spires/find/hep/www?r...
URL:http://arXiv.org/abs/hep-ex/0507047
URL:http://publications.mppmu.mpg.de/?action=search&mp...
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