Bdecays and models forCPviolation

The decay modes $B$ to $\pi \pi$, $\psi K_S$, $K^{-}D$, $\pi K$, and $\eta K$ are promising channels to study the unitarity triangle of the $\mathrm{CP}$-violating Cabibbo-Kobayashi-Maskawa (CKM) matrix. In this paper I study the consequences of these measurements in the Weinberg model. I show that using the same set of measurements, the following different mechanisms for $\mathrm{CP}$ violation can be distinguished: (1) $\mathrm{CP}$ is violated in the CKM sector only; (2) $\mathrm{CP}$ is violated spontaneously in the Higgs sector only; and (3) $\mathrm{CP}$ is violated in both the CKM and Higgs sectors.