Isgur-Wise function and a new approach to Potential Model

Abstract

Considering the Cornell potential $V(r)=-\frac{4{\alpha }_s}{3r}+br+c$, we have revisited the Dalgarno's method of perturbation by incorporating two scales $r^{short}$ and $r^{long}$ as integration limit so that the perturbative procedure can be improved in a potential model. With the improved version of the wave function the ground state masses of the heavy-light mesons $D,D_s,B,B_s$ and $B_c$ are computed. The slopes and curvatures of the form factors of semi-leptonic decays of heavy-light mesons in both HQET limit and finite mass limit are calculated and compared with the available data.

Comments: 18 pages, 2 figures, To appear in International Journal of Modern Physics A