Using the CLEO detector at the Cornell Electron Storage Ring, we have made a measurement of R≡σ(e(+)e(-)→hadrons)/σ(e+e-→μ(+)μ(-))=3.56±0.01±0.07 at s√=10.52 GeV. This implies a value for the strong coupling constant of α(s)(10.52 GeV)=0.20±0.01±0.06, or α(s)(MZ)=0.13±0.005±0.03.
This is the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.57.1350.
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