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preprints:1997:ttp97-04 [2016/03/17 11:03] (current)
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 +====== TTP97-04 HQET chromomagnetic interaction at two loops  ====== 
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 +  
 +   <hidden TTP97-04  HQET chromomagnetic interaction at two loops  > We present the coefficient of the chromomagnetic interaction operator, 
 + the only unknown coefficient in the Heavy Quark Effective Theory 
 + (HQET) lagrangian up to the $1/m$ level, 
 + with the two--loop accuracy by matching scattering amplitudes 
 + of an on--shell heavy quark in an external field in full QCD and HQET, 
 + and obtain the two--loop anomalous dimension of this operator in HQET. 
 +  
 + </hidden> 
 +|**Andrzej Czarnecki and Andrey Grozin**  |  
 +|** Phys. Lett. B405 142 1997  **  | 
 +| {{preprints:1997:ttp97-04.pdf|PDF}} {{preprints:1997:ttp97-04.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/9701415|arXiv]]   | 
 +| |