Matrix elements of ΔI = 3/2 K → ππ decays

We present a numerical computation of matrix elements of ΔI = 3/2 K → ππ decays by using Wilson fermions. In order to extrapolate to the physical point we work at unphysical kinematics and we resort to Chiral Perturbation Theory at the next-to-leading order. In particular we explain the case of the electroweak penguins 07,8 which can contribute significantly in the theoretical prediction of sol vertical bar ε'/ε. The study is done at β = 6.0 on a 243 x 64 lattice