Recent progress on supersymmetric effects in rare K decays

TL;DR

This paper reviews how supersymmetric effects influence rare K decays, highlighting their potential to reveal details of the SUSY-breaking mechanism and their correlation with other observables.

Contribution

It provides a comprehensive analysis of MSSM effects on rare K decays, including scenarios beyond minimal flavor violation and at various tan beta levels.

Findings

Rare K decays are sensitive to MSSM soft-breaking terms.

Correlations among observables can help identify SUSY-breaking mechanisms.

Rare K decays complement B-physics and collider data in SUSY studies.

Abstract

The dominant MSSM effects in the rare K decays, K+ --> pi+ nu nu bar, KL --> pi0 nu nu bar, KL --> pi0 e+ e- and KL --> pi0 mu+ mu-, are discussed both within and without the minimal flavor violation hypothesis, at moderate and large tangent beta. In each case, the sensitivities to MSSM soft-breaking terms are compared, laying emphasis on possible correlations among observables. In most scenarios, rare K decays offer unique windows into the Delta S=1 sector of the soft-breaking terms. Therefore, together with B-physics and collider observables, these modes will be essential for reconstructing the still elusive SUSY-breaking mechanism.