KL -> pi0 nu nu-bar as a Probe of New Physics
  We summarize the theoretical virtues of the rare K -> pi nu nu-bar decays and emphasize the unique role of KL -> pi0 nu nu-bar in probing the nature of physics beyond the Standard Model, in particular concerning possible new sources of CP violation and flavor-symmetry breaking. A brief summary of the prospects for the measurement of the KL -> pi0 nu nu-bar rate is also given. 
Douglas Bryman, Andrzej J. Buras, Gino Isidori, and Laurence   Littenberg