FCNC and CP Violation Observables in a SU(3)-flavoured MSSM

TL;DR

This paper explores how a SU(3) flavour symmetry with spontaneous CP violation in a minimal supersymmetric standard model can address flavour and CP problems while predicting observable deviations from the Standard Model in lepton decays, EDMs, and kaon CP violation.

Contribution

It provides an explicit SU(3) flavour symmetry model with spontaneous CP violation that explains flavour structures and predicts measurable deviations in flavor and CP violation observables.

Findings

Large contributions expected in $oldsymbol{ ext{μ} o e ext{γ}}$ and $oldsymbol{ au o ext{μ} ext{γ}}$ decays

Significant effects on electric dipole moments $d_e$ and $d_n$

Enhanced CP violation in kaon processes $oldsymbol{ ext{ε}_K}$

Abstract

A non-Abelian flavour symmetry in a minimal supersymmetric standard model can explain the flavour structures in the Yukawa couplings and simultaneously solve the SUSY flavour problem. Similarly the SUSY CP problem can be solved if CP is spontaneously broken in the flavour sector. In this work, we present an explicit example of these statements with a SU(3) flavour symmetry and spontaneous CP violation. In addition, we show that it is still possible to find some significant deviation from the SM expectations as far as FCNC and CP violation are concerned. We find that large contributions can be expected in lepton flavour violating decays, as $\mu \to e \gamma$ and $\tau \to \mu \gamma$, electric dipole moments, $d_e$ and $d_n$ and kaon CP violating processes as $\epsilon_K$. Thus, these flavoured MSSM realizations are phenomenologically sensitive to the experimental searches in the realm of flavor and CP vioation physics.