Precise Determinations of the Strong Cou
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J.H. KΓΌhn
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Article
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2008
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Elsevier Science
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English
β 328 KB
Recent results for the cross section of electron-positron annihilation into hadrons and for the decay rates of the Z-boson and the Ο -lepton into hadrons including corrections of order Ξ± 4 s are reviewed. The consistency between two values of Ξ±s measured at vastly different energies constitutes a st