CERN Accelerating science

Preprint
Report number	CERN-OPEN-99-337
Title	Power Law Corrections to Hadronic Event-Shape Variables in $e^{+}e^{-}$ Annihilation
Author(s)	Stenzel, H (CERN)
Publication	1997
Collaboration	ALEPH Collaboration
Imprint	19 Aug 1997
Number of pages	11
Presented at	International Europhysics Conference on High-Energy Physics, Jerusalem, Israel, 19 - 25 Aug 1997
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LEP ; ALEPH
Keywords	e+ e-
Abstract	Measurements of distributions and mean values of the event-shape variables thrust and heavy jet mass in the center-of-mass energy range from 14 GeV up to 172 GeV are analyzed for possible non-perturbative corrections following a power law of the form 1/Q. These corrections are characterized by a single parameter, which can be fitted to the data together with the strong coupling constant. Results on alpha_s are compared to those obtained with hadronization corrections from a Monte Carlo generator.
Other source	Inspire
Submitted by	catherine.cart@cern.ch