Probing the MSSM flavor structure with low energy CP violation

TL;DR

This paper analyzes flavor-changing and CP violation effects in SUSY theories, focusing on b --> s transitions and the potential to explain large CP violation signals through specific SUSY models with flavor symmetries.

Contribution

It demonstrates that models with large right-right mass insertions can naturally account for large CP violation effects, contrasting with the limitations of the MFV framework.

Findings

Models with large right-right mass insertions explain large S_psi_phi effects.

MFV framework cannot account for large CP violation signals.

Distinct flavor symmetry models show characteristic observable correlations.

Abstract

We report on an extensive analysis of FCNC and CPV effects in SUSY theories. We present results for Delta F=2 and Delta F=1 processes governed by b --> s transitions both in the low and high tanbeta regime, focussing in particular on S_psi_phi, the phase of Bs mixing. We emphasize that while the MFV framework is not suited to explain potentially large effects in S_psi_phi as indicated by recent data from CDF and D0, models with large right-right mass insertions in the 32 sector provide natural frameworks to account for such effects. Exemplarily we consider two SUSY models based on an abelian and a non-abelian flavor symmetry that show representative flavor structures in the soft SUSY breaking terms and stress that the characteristic correlations among the considered observables allow to distinguish between the different models.