====== TTP98-18 Determining  the Strange Quark Mass in Cabibbo Suppressed Tau Lepton Decays ======
 
 
   <hidden TTP98-18  Determining  the Strange Quark Mass in Cabibbo Suppressed Tau Lepton Decays > In this work radiative corrections in the total hadronic decay rate of
 the tau-lepton and some moments of its differential distributions are
 studied employing perturbative QCD and the operator product expansion.
 We calculate quadratic quark mass corrections in the strange mass to
 the decay rate ratio R_{\tau}  to the order 
 O(\alpha_s^3 m^2) and find that they contribute appreciably 
 to the Cabibbo suppressed decay modes of the $\tau$-lepton.  
 Using the results of a recent experimental analysis, we obtain 
 m_s(1 GeV  ) = 200 \pm 40_{exp} \pm 30_{th}  MeV.
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|**K. G. Chetyrkin, J.H. K\"uhn and   A.A. Pivovarov**  | 
|** Nucl.Phys. B533 473-493 1998  **  |
| {{preprints:1998:ttp98-18.pdf|PDF}} {{preprints:1998:ttp98-18.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/9805335|arXiv]]   |
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