Squark mixing contributions to the CP violating phase γ

We investigate the possibility that the CP violation due to the soft supersymmetry breaking terms in squark mixing can give significant contributions to the various γ related parameters in B decays, different from those of the standard model. We derive the new limits on (δ12u)LL,LR,RR and on (δ23d)LL,LR,RR from the recent data on D0-D-bar0 oscillation as well as those on Bs0-B-bars0 oscillation. We show that, together with all the other constraints, the currents limits on these parameters still allow large contributions to the CP violating phases in Bs0-B-bars0 as well as D0-D-bar0 oscillations which will modify some of the proposed measurements of γ parameters in CP violating B decays. However, the current constraints already dictate that the one-loop squark mixing contributions to various B decay amplitudes cannot be competitive with that of the standard model (SM), at least for those B decay modes which are dominated by the tree level amplitudes within the SM, and therefore they are not significant in contributing to CP asymmetries in the corresponding B decays