The ratio R of hadronic and electronic Z widths and the strong coupling constants αs

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Abstract

We review the relation between the ratio of hadronic and electronic Z widths, R = Γ(Z → qq)/Γ(Z → e+e-) and the strong coupling constant at the Z mass, αs. The theoretical uncertainty of αs derived from R is estimated to be Δαs = ±0.002 (electroweak) ± 0.002 (QCD)-0.003+0.004 (mtop, mHiggs). © 1994.

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Hebbeker, T., Martinez, M., Passarino, G., & Quast, G. (1994). The ratio R of hadronic and electronic Z widths and the strong coupling constants αs. Physics Letters B, 331(1–2), 165–170. https://doi.org/10.1016/0370-2693(94)90958-X

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