Kaon physics overview

TL;DR

This paper reviews the current theoretical understanding of Kaon physics, highlighting recent progress in decay processes and exploring potential New Physics scenarios affecting Kaon observables.

Contribution

It provides a comprehensive overview of recent theoretical developments in Kaon physics, including rare decay analyses and implications for New Physics models.

Findings

Progress in understanding $ ext{ε}_K$ and $K_S o \mu^+\mu^-$ decays

Discussion of New Physics scenarios impacting Kaon observables

Summary of theoretical status of $ ext{Δ}S=1$ and $ ext{Δ}S=2$ processes

Abstract

The present status of Kaon physics is summarized from a theory point of view. Focus is laid on $\Delta S=2$, $\Delta S=1$ as well as on rare Kaon decays, where progress has been made for instance in the case of $\varepsilon_K$ and $K_S\to \mu^+\mu^-$. Furthermore, several New Physics scenarios are discussed in the context of rare Kaon decays and other Kaon observables.