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Δ I=1/2 K → ππ decays at next-to-leading order in chiral perturbation theory

Presenter: Changhoan Kim — Southampton University

Changhoan Kim, Chris Sachrajda

In this talk, we propose a new approach to study K → ππ matrix elements in chiral perturbation theory. The method is based on measuring unphysical Kπ → π transitions in order to determine low energy coefficients of weak operators upto O(p4).