Lepton-flavor violating decays of neutral Higgs to muon and tauon in supersymmetric economical 3-3-1 model

TL;DR

This paper explores lepton-flavor violating decays of the Higgs boson into muon and tau in the SUSYE331 model, predicting potentially detectable signals at the LHC and analyzing the dominant contributions to LFV effects.

Contribution

It introduces the analysis of LFV Higgs decays within the SUSYE331 model, highlighting the dominance of left-handed LFV terms and potential observability at colliders.

Findings

Br(H -->tau^+mu^-)/Br(H -->tau^+tau^-) can reach ~10^{-3}

LFV effects dominated by left-handed terms, larger by factor of 10^3

Potential detection of Higgs LFV decays at the LHC

Abstract

We investigate Lepton-Flavor Violating (LFV) decays of Higgs to muon-tau in the supersymmetric economical 3-3-1 (SUSYE331) model. In the presence of flavor mixing in sleptons {mu,tau} and large values of v/v', the ratio of Br(H -->tau^+mu^-)/Br(H -->tau^+tau^-) can reach to non-negligible values O(10^{-3}), as in many known SUSY models. We predict that for the Standard Model Higgs boson, the LHC may detect its decay to muon and tauon. We also investigate the asymmetry between left and right LFV values of corrections and prove that the LFV effects are dominated by the left FLV term, which is O(10^3) times larger than the right LFV term in the limit of small values of |\mu_\rho|/m_SUSY. The contributions of Higgs-mediated effects to the decay tau --> mu mu mu are also discussed.