Important Rare Kaon Decays

Kaon decays stay as one of the benchmarks of the Standard Model and its possible deviations. Though most of the channels receive low-energy non-perturbative contributions and, therefore, the possibility of extracting Standard Model parameters with accurate precision is somewhat dumbed, there are a few rare decays that are theoretically clean and may open a window on New Physics. Here we recall two of them: and KL→π0ℓ+ℓ−.