Determinations of alphaS at sqrts= 14 to 44 GeV using Resummed Calculations
Abstract
The strong coupling constant alphaS is determined using recently re-analysed e+e- annihilation data collected by the JADE experiment at sqrts= 14 to 44 GeV. The measurements are based on O(alphaS**2)+NLLA predictions for various event shape observables. The calculations are found to describe reliably data at the lowest energies of the e+e- continuum where non-perturbative contributions become important. The results for alphaS are in good agreement with the QCD expectation for the running of the strong coupling constant. This is the first determination of alphaS at sqrts= 14 and 22 GeV based on resummed QCD predictions.
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