Searching for signatures of supersymmetry at B-factories Original Research Article

We analyze the predictions for CP asymmetries in B0-meson decays within the framework of the supersymmetric standard model (SSM). It is pointed out that owing to sizable new contributions to Bd0−B0d and K0−K0 mixings, the experimentally allowed range for the CP-violating phase δ of the Cabibbo-Kobayashi-Maskawa matrix may be different from the one obtained in the standard model (SM). This has important effects on the allowed values of CP asymmetries in B0-meson decays and on their correlations. We calculate the ratio R of the SSM and the SM contributions to the B0d–B0d mixing parameter xd and discuss in detail the ranges of R and S which are consistent with the experimental values of xd and the CP violation parameter ϵ for K0–K0 mixing. The CP asymmetries are predicted to have values different from the SM_predictions in sizable regions of parameter space. We also discuss the SSM predictions for B0s–B0s mixing.