CERN Accelerating science

Article
Report number	hep-ph/9911216
Title	Review on $\alpha_{s}$ at LEP
Author(s)	Wicke, Daniel (Wuppertal U.)
Publication	2000
Imprint	2000
Number of pages	7
Note	To be published in the proceedings of Hadron99 held in Beijing, 24-28. Aug. 1999. 7 pages, 7 figures. http://www.delphi.uni-wuppertal.de/qcd/Talks.html#Hadron99
In:	Nucl.Phys. A675 (2000) pp.417C-423C
In:	8th International Conference on Hadron Spectroscopy, Beijing, China, 24 - 28 Aug 1999, pp.417-423
DOI	10.1016/S0375-9474(00)00299-2
Subject category	Particle Physics - Phenomenology
Abstract	To measure the strong coupling alpha_s from event shape observables two ingredients are necessary. A perturbative prediction containing the dependence of observables on alpha_s and a description of the hadronisation process to match the perturbative prediction with the hadronic data. As perturbative prediction O(alpha_s^2), NLLA and combined calculations are available. Beside the well known Monte-Carlo based models also analytical predictions, so called power corrections, exist to describe the hadronisation. Advantages and disadvantages of the different resulting methods for determining the strong coupling and its energy dependence will be discussed, the newest DELPHI results will be presented, and an overview of the LEP results will be included.
Copyright/License	Copyright @ unknown. Published by Elsevier B.V.

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