Flavor Violation in Supersymmetric Q_6 Model

TL;DR

This paper explores flavor violation in a supersymmetric model with a non-Abelian Q_6 symmetry, showing that Higgs and SUSY contributions are consistent with experimental constraints and proposing a solution to the SUSY CP problem.

Contribution

It introduces a predictive Q_6-based SUSY model with three Higgs families, analyzing flavor violation and proposing a simple solution to the SUSY CP problem.

Findings

Higgs-mediated meson mixing within experimental limits for 1-5 TeV Higgs masses

SUSY loop-induced flavor violations are consistent with data

Light Higgsinos can resolve the SUSY CP problem

Abstract

We investigate flavor violation mediated by Higgs bosons and supersymmetric particles in a predictive class of models based on the non-Abelian flavor symmetry Q_6. These models, which aim to reduce the number of parameters of the fermion sector and to solve the flavor changing problems of generic SUSY setup, assume three families of Higgs bosons and spontaneous/soft violation of CP symmetry. Tree-level contributions to meson-antimeson mixings mediated by Higgs bosons are shown to be within experimental limits for Higgs masses in the (1-5) TeV range. Calculable flavor violation induced by SUSY loops are analyzed for meson mixing and lepton decays and found to be consistent with data. Significant new SUSY contributions arise in B_s- \bar{B}_s mixing, but non-standard CP violation is suppressed. A simple solution to the SUSY CP problem is found, which requires light Higgsinos.