TESTING THE SUPERWEAK THEORY OF CP VIOLATION IN NEUTRAL BETA-DECAYS

In order to rule out the superweak theory for CP violation, future experiments will try to find a difference between the CP-violating asymmetries in the decays B0-->psi-K(S) and B0-->pi+pi-. However, Winstein recently noted that, for some acceptable values of the Cabibbo-Kobayashi-Maskawa parameters, the standard model would give equal asymmetry parameters for these decays just as the superweak theory does. In this paper we show that, by considering both tree and penguin contributions to the decay amplitudes, the test can still be effective if a third asymmetry is measured with enough precision.