====== TTP97-26 $\alpha_s(m_Z)$ from tau decays with matching conditions at three loops  ======
 
 
   <hidden TTP97-26  $\alpha_s(m_Z)$ from tau decays with matching conditions at three loops  > Using the recent four-loop calculations of the QCD beta-function and
 the three-loop matching coefficients we study the induced error in
 $\alpha_s(m_Z)$ obtained from $\alpha_s(m_tau)$ due to the evolution 
 procedure. We show that, when consistent matching and running is used
 at this order, these errors are pushed below 0.0005 in $\alpha_s(m_Z)$. 
 
 </hidden>
|**German Rodrigo (Karlsruhe U.), Antonio Pich, Arcadi Santamaria (Valencia U.)**  | 
|** Phys. Lett. B 424 367-374 1998  **  |
| {{preprints:1997:ttp97-26.pdf|PDF}} {{preprints:1997:ttp97-26.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/9707474|arXiv]]   |
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