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Determination of αs from hadronic event shapes in e+e− annihilation at 192 ⩽s⩽ 208 GeV

Document type: Articulo

Abstract

Results are presented from a study of the structure of high energy hadronic events recorded by the L3 detector at √s 192 GeV. The distributions of several event shape variables are compared to resummed O(α2 s ) QCD calculations. We determine the strong coupling constant at three average centre-of-mass energies: 194.4, 200.2 and 206.2 GeV. These measurements, combined with previous L3 measurements at lower energies, demonstrate the running of αs as expected in QCD and yield αs(mZ) = 0.1227 ± 0.0012 ± 0.0058, where the first uncertainty is experimental and the second is theoretical.

General information

Issue date: 20 de abril de 2002
Document language: English
Journal: Physics Letters B; vol. 536, no. 3-4
Origin: Facultad de Ciencias Exactas
ISSN: 0370-2693
Pages: 217-228
xmlui.dri2xhtml.METS-1.0.item-dc-subject: Física ; high energy hadronic events ; L3 detector ; QCD calculations
Subjects: Ciencias Exactas

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Created: 14 de junio de 2019
Available since: 14 de junio de 2019
Please, use one of this identificators(URI) for cite o linking this item:
  • http://sedici.unlp.edu.ar/handle/10915/76548
  • https://doi.org/10.1016/S0370-2693(02)01814-2

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    Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) Except where otherwise noted, this item's license is described as Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)