Duality Violation and the K --> pi pi Electroweak Penguin Operator   Matrix Elements from Hadronic Tau Decays
  We discuss a preliminary study of the impact of duality violations on extractions from tau decay data of the D=6 VEVs which determine chiral limit Standard Model K-->pi pi matrix elements of the electroweak penguin operators. 
D. Boito, O. Cata, M. Golterman, M. Jamin, K. Maltman, J. Osborne and   S. Peris
hep-ph