Lepton Flavor Violating Decays of Neutral Higgses in Extended Mirror Fermion Model

TL;DR

This paper investigates lepton flavor violating decays of neutral Higgs bosons within an extended mirror fermion model, highlighting tensions between LHC observations and low-energy experimental limits.

Contribution

It provides a detailed one-loop analysis of Higgs decays in a novel extended mirror fermion framework with specific symmetries.

Findings

Potential tension between Higgs decay observations and rare decay constraints.

Constraints on model parameters from current experimental limits.

Insights into lepton flavor violation mechanisms in extended models.

Abstract

We perform the one-loop induced charged lepton flavor violating decays of the neutral Higgses in an extended mirror fermion model with non-sterile electroweak-scale right-handed neutrinos and a horizontal $A_4$ symmetry in the lepton sector. We demonstrate that for the 125 GeV scalar $h$ there is tension between the recent LHC result ${\cal B}(h \to \tau \mu) \sim $ 1% and the stringent limits on the rare processes $\mu \to e \gamma$ and $\tau \to (\mu$ or $e) \gamma$ from low energy experiments.