Perturbative QCD corrections to the ratioRforτdecay
- 1 March 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 39 (5) , 1458-1460
- https://doi.org/10.1103/physrevd.39.1458
Abstract
The perturbative QCD correction to the semihadronic decay rate of a heavy lepton is expressed as an expansion in . In the case of the τ lepton, the ratio of the semihadronic and electronic decay rates is R=3[1+/π+5.20(/π +104.0(/π]. The use of R to give a precise determination of is advocated.
Keywords
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