Recent progress on supersymmetric effects in rare K decays

The dominant MSSM effects in the rare K decays K+ → π+νν̄ , KL → π0νν̄ , KL → π0e+e− and KL → π0μ+μ−, are discussed both within and without the minimal flavor violation hypothesis, at moderate and large tanβ . In each case, the sensitivities to MSSM soft-breaking terms are compared, laying emphasis on possible correlations among observables. In most scenarios, rare K decays offer unique windows into the ∆S = 1 sector of the soft-breaking terms. Therefore, together with B-physics and collider observables, these modes will be essential for reconstructing the still elusive SUSY-breaking mechanism.