CPviolation and CKM phases from angular distributions forBsdecays into admixtures ofCPeigenstates

We investigate the time evolutions of angular distributions for $B_s$ decays into final states that are admixtures of $\mathrm{CP}$-even and $\mathrm{CP}$-odd configurations. A sizable lifetime difference between the $B_s$ mass eigenstates allows a probe of $\mathrm{CP}$ violation in time-dependent untagged angular distributions. Interference effects between different final state configurations of $B_s\to D_s^{*+}{D}_s^{*-},$ $J/\psi \phi$ determine the Wolfenstein parameter $\eta$ from untagged data samples, or, if one uses $|V_{\mathrm{ub}}|/|V_{\mathrm{cb}}|$ as additional input, the notoriously difficult to measure CKM angle $\gamma$. Another determination of $\gamma$ is possible by using isospin symmetry of strong interactions to relate untagged data samples of $B_s\to K^{*+}{K}^{*-}$ and $B_s\to K^{*0}{\overline{K}}^{*0}$. We note that the untagged angular distribution for $B_s\to {\rho }^0\phi$ provides interesting information about electroweak penguin diagrams.