Rare Kaon Decays

TL;DR

Rare Kaon decays are powerful tools for probing new physics, with recent progress in precise Standard Model predictions enhancing their potential to reveal physics beyond current theories.

Contribution

This paper reviews the latest status and progress in Standard Model predictions for rare Kaon decays and discusses their sensitivity to new physics.

Findings

Improved theoretical predictions for K+ --> pi+ nu anti-nu and K(L) --> pi0 nu anti-nu decays.

Enhanced understanding of the potential of rare Kaon decays to detect new physics.

Analysis of predictions for K(L) --> pi0 l+ l- and K(L) --> mu+ mu- decays.

Abstract

Rare Kaon decays provide sensitive probes of short distance physics. Among the most promising modes are the K+ --> pi+ nu anti-nu and K(L) --> pi0 nu anti-nu modes due to their theoretical cleanness and the dedicated experiments, NA62 and KOTO. The key to the success of New Physics searches in these modes is the precision in the standard model prediction. We review the status and the recent progress of their standard model prediction, and also discuss the predictions and New Physics sensitivities of the K(L) --> pi0 l+ l- and K(L) --> mu+ mu- decays.