Exclusive Decays $B \rightarrow K ψ, B \rightarrow K^* ψ$ using Heavy Quark Symmetries

We use the new symmetries in the heavy quark limit to calculate the exclusive B-decays $B \rightarrow K \psi ({\psi}^{\prime})$ and $B \rightarrow K^* \psi ({\psi}^{\prime})$. The estimated decay rates are compared with experimental values. We also estimate rare $B \rightarrow K^* \gamma $ decay rate, based on these experimental data and heavy quark symmetry.