Electroweak radiative corrections to the semihadronic decay rate of theτlepton

The one-loop electroweak radiative correction to the decay rate of the $\tau$ lepton into a neutrino plus hadrons is calculated. The correction includes a large logarithm of $\frac{M_Z}{M_{\tau }}$ whose coefficient was calculated previously. The constant under the logarithm gives an additional electroweak correction of 0.1%. It is argued that modifications of this electroweak correction due to nonperturbative QCD effects are suppressed by powers of $M_{\tau }$.