K -> pi pi Electroweak Penguins in the Chiral Limit
V. Cirigliano, J. F. Donoghue, E. Golowich, K. Maltman
Abstract
We report on dispersive and finite energy sum rule analyses of the electroweak penguin matrix elements < (pi pi) | Q7,8 | K > in the chiral limit. We accomplish the correct perturbative matching (scale and scheme dependence) at NLO in alphas, and we describe two different strategies for numerical evaluation.
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