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preprints:1997:ttp97-18 [2016/03/17 11:03] (current)
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 +====== TTP97-18 Heavy Quark Current Correlators to ${\cal O}(\alpha_s^2)$  ====== 
 +  
 +  
 +   <hidden TTP97-18  Heavy Quark Current Correlators to ${\cal O}(\alpha_s^2)$  > In this paper the three-loop polarization functions \Pi(q^2) 
 + are calculated for the cases of an external vector, axial-vector, scalar or 
 + pseudo-scalar current. Results are presented for the 
 + imaginary part which directly leads to the cross section 
 + $\sigma(e^+e^- \to Z \to hadrons)$ and to the Higgs 
 + decay rates, respectively. 
 +  
 + </hidden> 
 +|**K.G. Chetyrkin, J.H. Kuehn, M. Steinhauser**  |  
 +|** Nucl. Phys. B505 40-64 1997  **  | 
 +| {{preprints:1997:ttp97-18.pdf|PDF}} {{preprints:1997:ttp97-18.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/9705254|arXiv]]   | 
 +| |