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Studies of QCD at e+ e- centre-of-mass energies between 91-GeV and 209-GeV

Jones, Roger W. L. and Finch, A. and Bouhova-Thacker, Eva and Hughes, Gareth and Smizanska, Maria and ALEPH Collaboration, The (2004) Studies of QCD at e+ e- centre-of-mass energies between 91-GeV and 209-GeV. European Physical Journal C: Particles and Fields, 35 (4). pp. 457-486. ISSN 1434-6044

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Abstract

The hadronic final states observed with the ALEPH detector at LEP in e+e− annihilation are analysed using 730 pb-1 of data collected between 91 and 209 GeV in the framework of QCD. In particular event-shape variables and inclusive charged particle spectra are measured. The energy evolution of quantities derived from these measurements is compared to analytic QCD predictions. The mean charged particle multiplicity, the charged particle momentum spectrum and its peak position are compared to predictions of the modified-leading-logarithmic approximation. The strong coupling constant αs is determined from a fit of the QCD prediction to distributions of six event-shape variables at eight centre-of-mass energies. A study of non-perturbative power law corrections is presented.

Item Type: Article
Journal or Publication Title: European Physical Journal C: Particles and Fields
Additional Information: Jones performed the data analysis of all observables included and worked with one other on the theoretical interpretations. This gives one of the most precise measurements of alpha_s, and so feeds into many physics predictions. RAE_import_type : Journal article RAE_uoa_type : Physics
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 2307
Deposited By: ep_importer
Deposited On: 03 Apr 2008 16:08
Refereed?: Yes
Published?: Published
Last Modified: 17 Sep 2013 08:18
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/2307

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