Abstract
The strong coupling constant, αs, has been determined in hadronic decays of theZ 0 resonance, using measurements of seven observables relating to global event shapes, energy correlations and jet rates. The data have been compared with resummed QCD calculations, which are combined with theO( 2s ) theory. The seven measurements agree to about 10% and the final results, based on a weighted average, is:
where the error includes both experimental and theoretical uncertainties. This value corresponds to renormalization scale\(\mu = M_{Z^0 } \) and the error includes the uncertainty in this choice of scale. The present measurement complements previous determinations using theO( 2s ) QCD matrix elements alone, and yields a compatible result, with comparable errors.
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OPAL Collaboration., Acton, P.D., Alexander, G. et al. A determination ofα s(\(M_{Z^0 } \)) at LEP using resummed QCD calculations. Z. Phys. C - Particles and Fields 59, 1–19 (1993). https://doi.org/10.1007/BF01555834
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DOI: https://doi.org/10.1007/BF01555834