标题： 格点量子色动力学，算符乘积展开，标准模型 显示英文标题

标题： Lattice QCD, O.P.E. and the Standard Model

摘要： 许多旧的和新的计算格点上的$K\to\pi\pi$振幅的方法被重新评估。 它们都涉及到非微扰确定匹配系数。 我将展示如何通过直接在格点上引入hadronic流的OPE，大大减少与算符混合相关的问题。 应用于CP对称（$\Delta I = 1/2$规则）和CP破坏（$\epsilon '/\epsilon$）过程的评估被提出。 显示英文摘要

摘要： A number of old and new methods for computing $K\to\pi\pi$ amplitudes on the lattice are reevaluated. They all involve a non-perturbative determination of matching coefficients. I will show how problems related to operator mixing can be greatly reduced by introducing the O.P.E. of hadronic currents directly on the lattice. Applications to the evaluation of CP-symmetric ($\Delta I = 1/2$ rule) and CP-violating ($\epsilon '/\epsilon$) processes are presented.