Isgur-Wise functions from the MIT bag model

AbstractThe Isgur-Wise functions for the ground state to ground state semileptonic decays involvingb→c transitions are calculated from the (modified) MIT bag model. It is checked that the results for the decays $$\bar B \to Dl\bar v$$ and $$\bar B \to D^* l\bar v$$ agree well with experiment. Predictions for the decays $$\Lambda _b \to \Lambda _c l\bar v,\bar B_s \to D_s^* l\bar v$$ and $$\bar B_s \to D_s^* l\bar v$$ are given and discussed.