A lower bound on hadronic EDMs from CP violation in D0-(D)over-bar0 mixing in SUSY alignment models

The SM predictions for CP violating effects in D meson systems are highly suppressed at the per mill level. Therefore, any experimental evidence for a sizable CP violation in D-0-(D) over bar (0) mixing would unambiguously point towards a New Physics (NP) signal. Within supersymmetric scenarios, the popular alignment models can naturally account for large, non-standard effects in D-0-(D) over bar (0) mixing. We demonstrate that, within alignment models, detectable CP violating effects in D-0-(D) over bar (0) mixing would unambiguously imply a lower bound for the electric dipole moment (EDM) of hadronic systems, like the neutron EDM and the mercury EDM, in the reach of future experimental sensitivities. The simultaneous evidence of CP violation in D meson systems together with non-vanishing hadronic EDMs would strongly support the idea of SUSY alignment models and disfavour gauge-mediated SUSY breaking models, SUSY models with MFV and non-Abelian SUSY flavour models. As a byproduct of our analysis, we study the correlation between the time dependent CP asymmetry in decays to CP eigenstates S-f and the semileptonic asymmetry a(SL) both model independently and in SUSY alignment models. (C) 2010 Elsevier B.V. All rights reserved.