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preprints:1997:ttp97-08 [2016/03/17 11:03] (current)
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 +====== TTP97-08 Two-loop QCD Corrections to $b \to c$ Transitions   at Zero Recoil: Analytical Results ====== 
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 +   <hidden TTP97-08  Two-loop QCD Corrections to $b \to c$ Transitions   at Zero Recoil: Analytical Results > We present analytical results for the $O(\alpha_s^2)$ contributions 
 + to the functions $\eta _A$ and $\eta _V$ which parameterize QCD 
 + corrections to semileptonic $b \to c$ transitions at zero recoil. 
 + Previously obtained approximate results are confirmed.  The methods of 
 + computing the relevant two-loop diagrams with two mass scales are 
 + discussed in some detail. 
 +  
 + </hidden> 
 +|**Andrzej Czarnecki and Kirill Melnikov**  |  
 +|** Nucl. Phys. B505 65--83 1997  **  | 
 +| {{preprints:1997:ttp97-08.pdf|PDF}} {{preprints:1997:ttp97-08.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/9703277|arXiv]]   | 
 +| |