Determination of the strong coupling constant based on event shapes

Dissertori, G. and Gehrmann-De Ridder, A. and Gehrmann, T. and Glover, E. W. N. and Heinrich, G. and Jaquier, M. and Luisoni, G. and Stenzel, H. (2010) Determination of the strong coupling constant based on event shapes. Il nuovo cimento C, 33 (2). pp. 67-74. ISSN 1826-9885

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We report on a determination of the strong coupling constant from a fit of QCD predictions for six event-shape variables, calculated at next-tonext-to-leading order (NNLO) and matched to resummation in the next-to-leadinglogarithmic approximation (NLLA). We use data collected by ALEPH at centre-ofmass energies between 91 and 206 GeV. We also investigate the role of hadronisation corrections, using both Monte Carlo generator predictions and analytic models to parametrise non-perturbative power corrections.

Item Type: Article
Uncontrolled Keywords: General properties of QCD (dynamics, confinement, etc.) ; Perturbative calculations ; Hadron production in e−e+ interactions ; Precision measurements in e−e+ interactions
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 31 Mar 2020 15:53
Last Modified: 31 Mar 2020 15:53

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