====== TTP97-31 Calculation of the semileptonic decay width of the $\Lambda_b$ baryon ======
 
 
   <hidden TTP97-31  Calculation of the semileptonic decay width of the $\Lambda_b$ baryon > We extend the approach based on the light-cone expansion and the heavy quark 
 effective theory to the inclusive semileptonic decay of an unpolarized
 $b$-flavored hadron. It is applied to calculate the semileptonic decay width
 of the $\Lambda_b$ baryon and its ratio to that of the $B$ meson. We obtain
 $\Gamma_{\rm SL}(\Lambda_b)= 51\pm 9 \ |V_{cb}|^2\mbox{ps}^{-1}$ and
 $\Gamma_{\rm SL}(\Lambda_b)/\Gamma_{\rm SL}(B)= 1.052\pm 0.006$.
 From the latter, the semileptonic branching fraction for $\Lambda_b$ is 
 predicted 
 to be $(8.7\pm 0.7)\%$. 
 </hidden>
|**Changhao Jin **  | 
|** Phys. Rev. D56 7267-7272 1997  **  |
| {{preprints:1997:ttp97-31.pdf|PDF}} {{preprints:1997:ttp97-31.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/9709457|arXiv]]   |
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