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Determination of αS using OPAL hadronic event shapes at √s=91--209 GeV and resummed NNLO calculations

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Hadronic event shape distributions from e+e− annihilation measured by the OPAL experiment at centre-of-mass energies between 91 GeV and 209 GeV are used to determine the strong coupling αS. The results are based on QCD predictions complete to the next-to-next-to-leading order (NNLO), and on NNLO cal...

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Bibliographic Details
Main Authors: Abbiendi, Giovanni (Author) , Bock, Peter (Author)
Corporate Author: OPAL Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 21 September 2011
In: The European physical journal. C, Particles and fields
Year: 2011, Volume: 71, Issue: 9, Pages: 1-21
ISSN:1434-6052
DOI:10.1140/epjc/s10052-011-1733-z
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-011-1733-z
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Author Notes:The OPAL Collaboration*
Description
Summary:Hadronic event shape distributions from e+e− annihilation measured by the OPAL experiment at centre-of-mass energies between 91 GeV and 209 GeV are used to determine the strong coupling αS. The results are based on QCD predictions complete to the next-to-next-to-leading order (NNLO), and on NNLO calculations matched to the resummed next-to-leading-log-approximation terms (NNLO + NLLA). The combined NNLO result from all variables and centre-of-mass energies is while the combined NNLO + NLLA result is The completeness of the NNLO and NNLO + NLLA results with respect to missing higher order contributions, studied by varying the renormalization scale, is improved compared to previous results based on NLO or NLO + NLLA predictions only. The observed energy dependence of αS agrees with the QCD prediction of asymptotic freedom and excludes the absence of running.
Item Description:*The OPAL Collaboration: G. Abbiendi, P. Bock [und 207 weitere Personen]
Im Titel ist der Buchstabe S tiefgestellt
Im Titel steht der Buchstabe s unter dem Wurzelsymbol
Gesehen am 23.02.2022
Physical Description:Online Resource
ISSN:1434-6052
DOI:10.1140/epjc/s10052-011-1733-z

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