====== TTP02-31 Bosonic Corrections to $\Delta r$ at the Two Loop Level ======
 
 
   <hidden TTP02-31  Bosonic Corrections to $\Delta r$ at the Two Loop Level > The details of the recent calculation of the two-loop bosonic
 corrections to the muon lifetime in the Standard Model are
 presented. The matching on the Fermi theory is
 discussed. Renormalisation in the on-shell and in the \MSb scheme is
 studied and transition between the schemes is shown to lead to
 identical results. High precision numerical methods are compared with
 mass difference and large mass expansions.
 </hidden>
|**M. Awramik, M. Czakon, A. Onishchenko, O. Veretin**  | 
|**  Phys. Rev. D  68 053004 2003  **  |
| {{preprints:2002:ttp02-31.pdf|PDF}} {{preprints:2002:ttp02-31.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/0209084|arXiv]]   |
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