标题： 奇异强相互作用在1/Nc的幂级数中 显示英文标题

标题： Kaon weak interactions in powers of 1/Nc

摘要： 我回顾了一种最近用于基于大-Nc展开计算弱电算符矩阵元的解析方法。 特别是，我对夸克拉格朗日量与支配K0-K0bar混合的介子手征拉格朗日量的匹配进行了较为详细的描述。 在ΔS=1区，我解释了如何对ε'/ε和ΔI=1/2规则进行估计。 最后，我给出了一个例子，说明该方法也可以用于格点计算。 显示英文摘要

摘要： I review a recent analytic method for computing matrix elements of electroweak operators based on the large-Nc expansion. In particular, I give a rather detailed description of the matching of the quark Lagrangian onto the meson chiral Lagrangian governing K0-K0bar mixing. In the DeltaS=1 sector, I explain how to obtain an estimate for both epsilon'/epsilon and the DeltaI=1/2 rule. Finally, I give an example of how the method can also be useful for lattice calculations.