Rare kaon decays in chiral perturbation theory

Abstract

Chiral Perturbation Theory provides a useful framework to analyze rare kaon decays, where long-distance effects are expected to play an important rôle. Some theoretical predictions obtained within this framework for radiative kaon decays are reviewed, together with the present experimental status. Special consideration is given to the K L → π 0 e + e − decay, which appears as an ideal candidate to look for new signals of CP-violation within the standard model.