====== TTP05-19 Summing next-to-next-to-leading logarithms in b->c transitions at zero recoil ======
 
 
   <hidden TTP05-19  Summing next-to-next-to-leading logarithms in b->c transitions at zero recoil > The HQET-1 -> HQET-2 matching coefficient for the b->c currents
 at zero recoil has been found with two-loop accuracy.
 The next-to-next-to-leading logarithms has been summed
 in the leading order in m_c/m_b.
 Higher-order corrections are estimated in the large-\beta_0 limit.
 </hidden>
|**Andrey Grozin**  | 
| {{preprints:2005:ttp05-19.pdf|PDF}} {{preprints:2005:ttp05-19.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/0509328|arXiv]]   |
| |