Abstract.
A study of perturbative QCD calculations combined with power corrections to model hadronisation effects is presented. The QCD predictions are fitted to differential distributions and mean values of event shape observables measured in \({\mathrm{e^+e^-}\) annihilation at centre-of-mass energies from \({\sqrt{s}} =14\) to 189 GeV. We investigate the event shape observables thrust, heavy jet mass, C-parameter, total and wide jet broadening and differential 2-jet rate and observe a good description of the data by the QCD predictions. The strong coupling constant \(\alpha_{\mathrm{S}}(M_{\mathrm{Z}^0})\) and the free parameter of the power correction calculations \(\alpha_0({\mathrm{2 GeV}})\) are measured to be
\begin{displaymath} \alpha_{\mathrm{Z}}(M_{\mathrm{Z}^0} = 0.1171^{+0.0032}_{-0.0020} \;\;\;\mathrm{and}\;\;\; \alpha_0({\mathrm{2 GeV}}) = 0.513^{+0.066}_{-0.045} \;\;\;. \end{displaymath}
The predicted universality of \(\alpha_0\) is confirmed within the uncertainties of the measurements.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received: 22 May 2001 / Published online: 5 November 2001
Rights and permissions
About this article
Cite this article
Fernández, P., Bethke, S., Biebel, O. et al. Tests of power corrections for event shapes in \({\mathrm{e^+e^-}\) annihilation. Eur. Phys. J. C 22, 1–15 (2001). https://doi.org/10.1007/s100520100750
Issue Date:
DOI: https://doi.org/10.1007/s100520100750