Measurement of the direct photon spectrum inΥ(1S)decays
- 1 May 1997
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 55 (9) , 5273-5281
- https://doi.org/10.1103/physrevd.55.5273
Abstract
Using data taken with the CLEO II detector at the Cornell Electron Storage Ring, we have determined the ratio of branching fractions: . From this ratio, we have determined the QCD scale parameter (defined in the modified minimal subtraction scheme) to be MeV, from which we determine a value for the strong coupling constant , or .
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