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



ID: 543144.0, MPI für Physik / MPI für Physik
Measurement of alpha_S with radiative hadronic events
Authors:Abbiendi, G.; et al.
Date of Publication (YYYY-MM-DD):2007
Title of Journal:European Physical Journal C
Journal Abbrev.:Eur.Phys.J.C
Issue / Number:53
Start Page:21
End Page:39
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:Hadronic final states with a hard isolated photon are studied using data taken at centre-of-mass energies around the mass of the Z boson with the OPAL detector at LEP. The strong coupling αs is extracted by comparing data and QCD predictions for event shape observables at average reduced centre-of-mass energies ranging from 24 GeV to 78 GeV, and the energy dependence of αs is studied. Our results are consistent with the running of αs as predicted by QCD and show that within the uncertainties of our analysis event shapes in hadronic Z decays with hard and isolated photon radiation can be described by QCD at reduced centre-of-mass energies. Combining all values from different event shape observables and energies gives αs(MZ)=0.1182±0.0015(stat.)±0.0101(syst.).
Classification / Thesaurus:OPAL
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2008-261
URL:http://www.slac.stanford.edu/spires/find/hep/www?i...
URL:dx.doi.org/10.1140/epjc/s10052-007-0470-9
URL:http://publications.mppmu.mpg.de/?action=search&mp...
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