K -> pi pi Electroweak Penguins in the Chiral Limit
  We report on dispersive and finite energy sum rule analyses of the electroweak penguin matrix elements < (pi pi) | Q_{7,8} | K > in the chiral limit. We accomplish the correct perturbative matching (scale and scheme dependence) at NLO in alpha_s, and we describe two different strategies for numerical evaluation. 
V. Cirigliano, J.F. Donoghue, E. Golowich, K. Maltman