K -> pi pi Electroweak Penguins in the Chiral Limit
arXiv:hep-ph/0209332 · doi:10.1016/S0920-5632(03)01846-2
Abstract
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.
4 pages, 2 figures. Contribution to QCD02, International Conference on Quantum Chromo-Dynamics, Montpellier (France), July 2-9 2002