CP VIOLATION IN THE DECAYS B(0)-]PSI-K(S) AND B(0)-]PI(+)PI(-) - A PROBE FOR NEW PHYSICS

We point out the strong correlation between the CP-violating asymmetries in the decays B0-->PSIK(s) and B0 --> pi+pi- that is predicted by the Kobayashi-Maskawa model. This results in a very restricted allowed region for the asymmetries, and so their measurement will provide a powerful test of the standard model. To show how new physics may give very different results, we look at the predictions of a simple model where both the standard model and superweak contributions to the K0 and B0 mass matrices coexist. We find that, for possible values of the parameters, practically any values are allowed for the asymmetries.