DPF99 - Lattice calculation of matrix elements relevant for Delta I=1/2 rule and epsilon-prime.

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Author: Dmitry Pekurovsky, Greg Kilcup (The Ohio State University).

Title: Lattice calculation of matrix elements relevant for Delta I=1/2 rule and epsilon-prime.

Abstract: We have gained enough statisticalprecision to distinguish signal from noise in matrix elementsof all operators relevant for the Delta I=1/2 rule in kaon decaysand for the direct CP violation parameter epsilon-prime.We confirm significant enhancement of Delta I=1/2 transitionsobserved in experiments, although a few large systematic uncertainties remain in our predictions: higher-order chiralcorrections and lattice spacing dependence.The estimate of epsilon-prime parameter is further complicatedby the problem of matching lattice and continuum operators.

Comments: 5 pages, RevTeX, 5 figures, uses epsf.

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DPF99