Measurement of the strong-coupling constant. cap alpha. /sub s/ to second order for 22< or =. sqrt. s < or =46. 78 GeV
1985
Using the Mark-J detector at the high-energy e/sup +/e/sup -/ collider PETRA, we compare the data from hadron production with the complete second-order QCD calculation over the energy region 22 to 46.78 GeV. We determine the QCD parameter ..lambda.. = 100 +- 30/sub -/45/sup +65/ MeV which yields the strong-coupling constant ..cap alpha../sub s/ = 0.12 +- 0.02 for ..sqrt..s = 44 GeV.
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