Learning about the Cabibbo-Kobayashi-Maskawa matrix fromCPasymmetries inB0decays

We show how relations among various classes of $\mathrm{CP}$ asymmetries in $B^0$ decays can be used to test the unitarity of the three-generation Cabibbo-Kobayashi-Maskawa matrix, independently of the mechanism of mixing in the $B^0$ and $K^0$ systems. We suggest various ways to determine the sign of $sin\delta$, independently of the sign of the $B_K$ parameter.