Eur. Phys. J. C 22, 1-15 (2001)
Tests of power corrections for event shapes in e+e- annihilationP.A. Movilla Fernández, S. Bethke, O. Biebel and S. Kluth
Max-Planck-Institut für Physik, Werner-Heisenberg-Institut Föhringer Ring 6, 80805 München, Germany
(Received: 22 May 2001 / Published online: 5 November 2001 - © Springer-Verlag / Società Italiana di Fisica 2001)
A study of per turb ative 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 e+e- annihilation at centre-of-mass energies from 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 and the free parameter of the power correction calculations are measured to be and The predicted universality of is confirmed within the uncertainties of the measurements.
© Società Italiana di Fisica, Springer-Verlag 2001