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preprints:1997:ttp97-13 [2016/03/17 11:03] (current)
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 +====== TTP97-13 Complete O(alpha_s^2) Corrections to Zero-Recoil Sum Rules for B-->D* Transitions ====== 
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 +   <hidden TTP97-13  Complete O(alpha_s^2) Corrections to Zero-Recoil Sum Rules for B-->D* Transitions > We present the complete O(alpha_s^2) corrections to the 
 + Wilson coefficient of the unit operator in the zero-recoil sum rule 
 + for the B-->D* transition.  We include both perturbative and 
 + power-suppressed nonperturbative effects in a manner consistent with 
 + the operator product expansion.  The impact of these corrections on 
 + |V_cb| extracted from semileptonic B-->D* decays near 
 + zero recoil is discussed.  The mixing of the heavy quark kinetic 
 + operator with the unit operator at the two loop level is 
 + obtained.  O(alpha_s) corrections to a number of 
 + power-suppressed operators are calculated. 
 +  
 + </hidden> 
 +|**Andrzej Czarnecki, Kirill Melnikov, and Nikolai Uraltsev**  |  
 +|** Phys. Rev. D57 1769 1998  **  | 
 +| {{preprints:1997:ttp97-13.pdf|PDF}} {{preprints:1997:ttp97-13.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/9706311|arXiv]]   | 
 +| |