====== TTP05-21 Four-Loop Decoupling Relations for the Strong Coupling ======
 
 
   <hidden TTP05-21  Four-Loop Decoupling Relations for the Strong Coupling > We compute the matching relation for the strong coupling constant
   within the framework of QCD up to four-loop order.
   This allows a consistent five-loop running (once the $\beta$
   function is available to this order) taking into account threshold effects.
   As a side product we obtain the effective coupling of a Higgs boson
   to gluons with five-loop accuracy.
 </hidden>
|**Y. Schroder and M. Steinhauser**  | 
|**  JHEP  0601 051 2006  **  |
| {{preprints:2005:ttp05-21.pdf|PDF}} {{preprints:2005:ttp05-21.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/0512058|arXiv]]   |
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