Articulo
Determination of α<SUB>s</SUB> as from hadronic event shapes measured on the Z° resonance
Autor
Dova, María Teresa
L3 Collaboration
Institución
Resumen
We present a study of the global event shape variables thrust and heavy jet mass, of energy-energy correlations and of jet multiplicities based on 250 000 hadronic Z0 decays. The data are compared to new QCD calculations including resummation of leading and next-to-leading logarithms to all orders. We determine the strong coupling constant αs (91.2 GeV) = 0.125±0.003 (exp) ± 0.008 (theor). The first error is the experimental uncertainty. The second error is due to hadronization uncertainties and approximations in the calculations of the higher order corrections. Facultad de Ciencias Exactas