Determinations of alphas using JADE data of e+e- Annihilations at sqrts = 22 to 44 GeV
P. A. Movilla Fernandez
Abstract
Data recorded by the JADE experiment at the PETRA e+e- collider were used to measure distributions of new event shape observables. The distributions were compared with resummed QCD calulations (O(alphas2)+NLLA), and the strong coupling constant alphas was determined at s= 22, 35 and 44 GeV. The results are in agreement with previous combined results of PETRA but have smaller uncertainties. Together with corresponding data from LEP, the energy dependence of alphas is significantly tested and is found to be in good agreement with the QCD expectation.
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