Supersymmetric contributions to direct CP violation in K -> pi pi gamma decays

TL;DR

This paper investigates how supersymmetric models could significantly enhance direct CP violation signals in certain kaon decays, offering new avenues to detect physics beyond the Standard Model.

Contribution

It demonstrates that supersymmetric effects can notably increase CP-violating observables in $K o \pi\pi\gamma$ decays, especially when supersymmetry dominates $\epsp/\eps$.

Findings

Enhanced $\epsp_{+-\gamma}$ and differential width asymmetries in supersymmetric scenarios.

Potential for these observables to serve as new probes for supersymmetry in $|\Delta S|=1$ transitions.

Complementary role to $\epsp/\eps$ and rare decay measurements.

Abstract

We analyze the supersymmetric contributions to direct-CP-violating observables in $K \to \pi\pi\gamma$ decays induced by gluino-mediated magnetic-penguin operators. We find that $\epsp_{+-\gamma}$ and the differential width asymmetry of $K^\pm \to \pi^\pm \pi^0 \gamma$ decays could be substantially enhanced with respect to their Standard Model values, especially in the scenario where $\epsp/\eps$ is dominated by supersymmetric contributions. These observables could therefore provide a useful tool to search for New Physics effects in $|\Delta S|=1$ transitions, complementary to $\epsp/\eps$ and rare decays.