Investigation of CP-even Higgs bosons decays $H \rightarrow \mu \tau$ within constraints of $l_a \rightarrow l_b \gamma$ in a 3-3-1 model with inverse seesaw neutrinos

TL;DR

This paper explores the decay of CP-even Higgs bosons into muon-tau pairs within a 3-3-1 model with inverse seesaw neutrinos, identifying parameter regions compatible with experimental constraints and comparing Higgs masses.

Contribution

It provides a detailed analysis of Higgs decay widths in a specific 3-3-1 model, considering experimental limits and neutrino mixing effects, which is a novel approach.

Findings

Existence of parameter regions where decay widths are below experimental limits

Comparison of SM-like Higgs mass with other CP-even Higgs bosons

Identification of parameter space consistent with $l_a ightarrow l_b \gamma$ constraints

Abstract

In a 3-3-1 model with inverse seesaw neutrinos, we use a simple form of Higgs potential to give four CP-even Higgs bosons ($H \equiv h^0_1,h^0_2,h^0_3,h^0_4$). We investigate $H \rightarrow \mu \tau$ decays in the parameter space regions satisfying the experimental limits of $l_a \rightarrow l_b \gamma$ with running parameters being the mass of the charged Higgs boson ($m_{H_1^\pm}$) and the mixing matrix of the heavy neutrinos ($M_R$). We show that there exist regions of parameter space where all partial widths $\Gamma (H \rightarrow \mu \tau)$ are less than the current experimental limit ($4.1 \times 10^{-6} GeV$). Analyzing the contributing components to $\Gamma (H \rightarrow \mu \tau)$, we also compare the mass of the SM-like Higgs boson with the corresponding ones of the other CP-even Higgs bosons in this model.