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arXiv · hep-lat/0110169

Extraction of K-->pipi Matrix Elements with Wilson Fermions

Ph. Boucaud·V. Gimenez·C. J. D. Lin·V. Lubicz·G. Martinelli·M. Papinutto·F. Rapuano·C. T. Sachrajda·:·S. P. Qcd R. collaboration
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Abstract

We present the status of a lattice calculation for the K-->pipi matrix elements of the (delta S=1) effective weak Hamiltonian, directly with two pion in the final state. We study the energy shift of two pion in a finite volume both in the I=0 and I=2 channels. We explain a method to avoid the Goldstone pole contamination in the computation of renormalization constants for (delta I=3/2) operators. Finally we show some preliminary results for the matrix elements of (delta I=1/2) operators. Our quenched simulation is done at beta=6.0, with Wilson fermions, on a (24^3 X 64) lattice.

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Ph. Boucaud, V. Gimenez, C. J. D. Lin, V. Lubicz, G. Martinelli, M. Papinutto, F. Rapuano, C. T. Sachrajda, :, S. P. Qcd R. collaboration. 2001-10-19. Extraction of K-->pipi Matrix Elements with Wilson Fermions. https://doi.org/10.1016/s0920-5632(01)01702-9

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