CKM matrix element Vcb in a QCD Potential model

We study the slope $ρ^{2}$ and curvature $C$ of Isgur Wise function for the heavy-light mesons in general with particular emphasis on $B$ meson in a QCD Potential model. The IW function is then used to compute the partial decay width and branching ratio for the semileptonic decay of $\left(B^{0}\rightarrow{D,D^{*}lν}\right)$. The computed value of the CKM element $|V_{cb}|=0.040$ is found to be in agreement with the available data.

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