Higgs flavor phenomenology in a supersymmetric left-right model with parity

Abstract

Abstract In this paper, we focus on the supersymmetric model with left-right (LR) symmetry, that is especially proposed in our previous work [1]. In this model, there are four Higgs doublets in order to realize the Standard Model (SM) fermion masses and the Cabibbo-Kobayashi-Maskawa matrix. The heavy Higgs doublets unavoidably have flavor changing couplings to the SM fermions and induce flavor-changing neutral currents at tree level. We study broader parameter space than the previous work with including the renormalization group corrections to the Yukawa couplings between the LR breaking scale, O $$ \mathcal{O} $$ (1013) GeV, and the supersymmetry breaking scales, O $$ \mathcal{O} $$ (100) TeV. The CP violating observable in K– K ¯ $$ \overline{K} $$ mixing, ϵ K , strongly constrains the model, so that heavy Higgs mass should be heavier than O $$ \mathcal{O} $$ (100) TeV. We study the lepton flavor violating (LFV) processes setting heavy Higgs masses to be 170 TeV. The branching ratios of μ → 3e and the μ–e conversion can be larger than 10 −16 that could be covered by the future experiments. We also study the degree of fine-tuning in the parameter region that predicts testable LFV processes.

Keywords

• Phenomenology of Field Theories in Higher Dimensions
• Supersymmetry Phenomenology