Measuring $γ$ in $B^\pm \to K^\pm (K K^*)_D$ decays

We propose to measure the CKM angle $\gamma$ without hadronic uncertainties from the analysis of $B^\pm \to K^\pm D^0$ and $K^\pm \bar D^0$ followed by singly Cabibbo-suppressed $D$ decays to non CP eigenstates, such as $K^\pm K^{*\mp}$. This method utilizes the interference between $b\to c\bar u d$ and $b\to u\bar c d$ decays, and we point out several of its attractive features. All the modes that need to be measured for our method are accessible in the present data.