Probing the flavor and CP structure of supersymmetric models with K→πν(ν)over-bar decays

We study the implications of various supersymmetric models on the rare K+ --> <pi(+)v(v)over bar> and K-L --> <pi(0)v(v)over bar> decays. Although large effects are possible in generic supersymmetric models, most of the known supersymmetric flavor models lead to negligible effects. Thus, it is likely that one can get information about CKM matrix elements from these decays even in the presence of supersymmetry. Moreover, the possibility of large contributions to K --> <pi v(v)over bar> in generic supersymmetry models can be constrained by improved bounds on D - (D) over bar mixing. We show that it may be possible to distinguish between different supersymmetric flavor models by combining the information from the K --> <pi v(v)over bar> decays with that from B - (B) over bar and D - (D) over bar mixing. (C) 1998 Elsevier Science B.V.