Isgur-Wise Functions from the Mit Bag Model

Abstract

The Isgur-Wise functions for the ground state to ground state semileptonic decays involving $b\to c$ transitions are calculated from the (modified) MIT bag model. It is checked that the results for the decays $\overline{B}\to Dl\overline{\hat{I}}½$ and $\overline{B}\to D^{\ast }l\overline{\hat{I}}½$ agree well with experiment. Predictions for the decays $\hat{I}{›}_b\to \hat{I}{›}_{c}l\overline{\hat{I}}½$, ${\overline{B}}_s\to D_{s}l\overline{\hat{I}}½$ and ${\overline{B}}_s\to D_s^{\ast }l\overline{\hat{I}}½$ are given and discussed.

12 pages (3 figures available upon request), LaTeX, TPJU - 9/93