====== TTP06-25 Decoupling of heavy quarks in HQET ======
 
 
      <hidden TTP06-25  Decoupling of heavy quarks in HQET > Decoupling of c-quark loops in b-quark HQET is considered.
 The decoupling coefficients for the HQET heavy-quark field
 and the heavy-light quark current are calculated with the three-loop accuracy.
 The last result can be used to improve the accuracy
 of extracting f_B from HQET lattice simulations
 (without c-quark loops).
 The decoupling coefficient for the flavour-nonsinglet QCD current
 with n antisymmetrized \gamma-matrices is also obtained at three loops;
 the result for the tensor current (n=2) is new.
 </hidden>
|**A.G. Grozin, A.V. Smirnov, V.A. Smirnov**  | 
|**  JHEP  11 022 2006  **  |
| {{preprints:2006:ttp06-25.pdf|PDF}} {{preprints:2006:ttp06-25.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/0609280|arXiv]] [[http://ttp.kit.edu/Progdata/ttp06/ttp06-25|Programs and Data]]   |
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