A New Estimate of ${\epsilon }^{\prime }/\epsilon$

Abstract

We discuss a new estimate of ${\epsilon }^{\prime }/\epsilon$ in the kaon system. The present approach is based on the evaluation of the hadronic matrix elements of the \mbox{$\Delta S=1$} effective quark lagrangian by means of the chiral quark model, with the inclusion of meson one-loop renormalization and NLO Wilson coefficients. The estimate here reviewed is fully consistent with the $\Delta I=1/2$ selection rule in $K\to \pi \pi$ decays, which is well reproduced within the same framework.

Comments: 12 pages, uuencoded LATEX2e file including 4 eps figures. Talk given at the Workshop on K Physics, Orsay, France, May 30 - June 4, 1996