CPviolation inB-meson decays

Abstract

The pattern of $\mathrm{CP}$ violation in the bottom sector is discussed. We introduce general techniques to expose new $\mathrm{CP}$-violating effects in the cascade decays of $B$ mesons. In the Kobayashi-Maskawa (KM) model, the $\mathrm{CP}$ asymmetries so obtained range from 2-20% for plausible values of the model parameters. This is to be compared with the small effects, of order ${10}^{-3\mathrm{}}$-${10}^{-4\mathrm{}}$, previously exhibited within this model. Effects of this size should be observable in upcoming experiments. Our approach stresses the on-shell transitions which make up the cascade decays of heavy mesons to ordinary hadrons, as opposed to the off-shell transitions which occur in the analogs of $K^{\circ }-{\overline{K}}^{\circ }$ mixing. The $\mathrm{CP}$ asymmetries generated by our techniques are of order $sin\delta$, where $\delta$ is the KM phase angle, and thus represent the maximum effects obtainable in this model.