Matrix elements of DI=3/2 K-->pi pi decays
Ph. Boucaud, V. Gimenez, C. -J. D. Lin, V. Lubicz, G. Martinelli, M. Papinutto, C. T. Sachrajda
Abstract
We present a numerical computation of matrix elements of DI=3/2 K-->pi pi 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 O7,8 which can contribute significantly in the theoretical prediction of epsilon'/epsilon. The study is done at beta=6.0 on a 243x64 lattice.
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