Rare kaon decays

TL;DR

This paper reviews recent theoretical advances in rare kaon decays, focusing on short-distance CP violation in K_L to pi^0 e+ e- and exploring related chiral tests.

Contribution

It provides a detailed analysis of short-distance contributions to rare kaon decays and discusses methods to distinguish them from long-distance effects.

Findings

Identification of short-distance CP violating contributions in K_L to pi^0 e+ e-

Development of techniques to separate long and short-distance effects

Discussion of chiral symmetry tests in kaon decays

Abstract

We review some recent theoretical results on rare kaon decays. Particular attention is devoted to establish the short distance (direct CP violating) contribution to K_L => \pi^0 e \bar{e}. This is achieved by a careful study of the long distance part. As byproduct, we discuss interesting chiral tests.