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ID 18770
file
creator
SLD, Collaboration
abstract
We determine the strong coupling αs from a comprehensive study of energy-energy correlations (EEC's) and their asymmetry (AEEC's) in hadronic decays of Z0 bosons collected by the SLD experiment at SLAC. The data are compared with all four available predictions of QCD calculated up to O(αs2) in perturbation theory, and also with a resummed calculation matched to all four of these calculations. We find large discrepancies between αs values extracted from the different O(αs2) calculations. We also find a large renormalization scale ambiguity in αs determined from the EEC's using the O(αs2) calculations; this ambiguity is reduced in the case of the AEEC's and is very small when the matched calculations are used. Averaging over all calculations, and over the EEC and AEEC results, we obtain αs(MZ2)=0.124-0.004+0.003 (expt.) ±0.009 (theory).
journal title
Physical Review D - Particles, Fields, Gravitation and Cosmology
volume
Volume 50
issue
Issue 9
start page
5580
end page
5590
date of issued
1994-11-01
publisher
American Physical Society
issn
1550-7998
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 1994 American Physical Society.
relation url
department
Graduate School of Advanced Sciences of Matter