Published December 6, 1990 | Version v1
Journal article

A measurement of energy correlations and a determination of αs(M sub(Z0)2) in e+e- annihilations at √s=91 GeV

Creators

Description

From an analysis of multi-hadron events from Z0 decays, values of the strong coupling constant αs(M2Z0) = 0.131±0.006(exp)±0.007(theor.) and αs(M2Z0) = 0.117-0.009+0.007(exp.)-0.002+0.006(theor.) are derived from the energy-energy correlation distribution and its asymmetry, respectively, assuming the QCD renormalization scale μ = MZ0. The theoretical error accounts for differences between O(αs2) calculations. A two parameter fit of ΛMS and the renormalization scale μ leads to ΛMS=216±85 MeV and μ2/s=0.027±0.013 or to αs(M2Z0) = 0.117-0.008+0.006(exp.) for the energy-energy correlation distribution. The energy-energy correlation asymmetry distribution is insensitive to a scale change: thus the αs value quoted above for this variable includes the theoretical uncertainty associated with the renormalization scale. (orig.)

Additional details

Publishing Information

Journal Title
Physics Letters, (Section) B
Journal Volume
252
Journal Issue
1
Series
Phys. Lett., B.
Journal Page Range
159-169
ISSN
0370-2693
CODEN
PYLBA

Optional Information

Collaborations
OPAL Collaboration.