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arxiv: hep-ex/9707018 · v1 · submitted 1997-07-08 · ✦ hep-ex

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A Measurement of the Total Cross Section for e⁺e⁻to hadrons at sqrt{s}=10.52 GeV

CLEO Collaboration , R. Ammar et al
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classification ✦ hep-ex
keywords alphahadronsmeasurementsigmacleoconstantcornellcoupling
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Using the CLEO detector at the Cornell Electron Storage Ring, we have made a measurement of R=sigma(e+e- ->hadrons)/sigma(e+e- ->mu+mu-) =3.56+/-0.01+/-0.07 at ECM=10.52 GeV. This implies a value for the strong coupling constant of alpha_s(10.52 GeV)=0.20+/-0.01+/-0.06, or alpha_s(M_Z)=0.13+/-0.005+/-0.03.

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  1. Perturbative QCD fitting of KEDR and BESIII $e^+e^-$ data for R(s) and $\alpha_s$ determination

    hep-ph 2026-03 unverdicted novelty 4.0

    Combined fits of KEDR and BESIII R(s) data yield alpha_s(M_Z) = 0.1179, 0.1221, and 0.1312 at NLO, NNLO, and NNNLO, demonstrating strong dependence on perturbative truncation order.