Mixing and CP violation in B and D decays

The standard Model predicts sizeable if not even maximal Bs -B-bars mixing; Bd - B-bard mixing is not expected to exceed the one percent level unless top quarks are very heavy (mt≥150 GeV) GeV. B decays also offer the best opportunity to discover CP violation outside the neutral Κ system. Employing the standard model one predicts - with reasonable confidence - CP asymmetries of up to 20% (or even more in some cases). The branching ratios for the individual exclusive modes of interest are not expected to exceed 10-3 level in most cases; the identification of such decays poses non-trivial problems. It is shown that by summing intelligently over appropriate classes of decays one can greatly enhance statistics without jeopardizing the signal. Very similar searches can be performed for D decays