Form Factors for Exclusive Semileptonic $B$--Decays
  We investigate the form factors for exclusive semileptonic decays of $B$-meson to $D,~D^*$, based on the parton picture and helped by the results of the HQET. We obtain the numerical results for the slope of the Isgur-Wise function, which is consistent with the experimental results, and we extracte the dependences of hadronic form factors on $q^2$ by varying input heavy quark fragmentation function without the nearest pole dominance ans\"atze. 
C. S. Kim, Jae Kwan Kim, Yeong Gyun Kim and Kang Young Lee