Eur. Phys. J. C 22, 1-15 (2001)
DOI: 10.1007/s1005201O0750
Tests of power corrections for event shapes in e+e- annihilation
P.A. Movilla Fernández, S. Bethke, O. Biebel and S. KluthMax-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)
Abstract
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