====== TTP04-06 $M(B^*_c)-M(B_c)$ Splitting from Nonrelativistic Renormalization Group ======
 
 
   <hidden TTP04-06  $M(B^*_c)-M(B_c)$ Splitting from Nonrelativistic Renormalization Group > We compute the hyperfine splitting in a heavy quarkonium composed of different
 flavors in next-to-leading logarithmic approximation using the nonrelativistic
 renormalization group.  We predict the mass difference of the vector and
 pseudoscalar charm-bottom mesons to be $M(B^*_c)-M(B_c)=65 \pm 24\,{(\rm
 th)}\,{}^{+19}_{-16}\,(\delta\alpha_s)$~MeV.
 </hidden>
|**A.A. Penin, A. Pineda, V.A. Smirnov, M. Steinhauser**  | 
|**  Phys.Lett.  B593 124-134 2004  **  |
| {{preprints:2004:ttp04-06.pdf|PDF}} {{preprints:2004:ttp04-06.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/0403080|arXiv]]   |
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