Vector Leptons in the Higgs Triplet Model

TL;DR

This paper explores how adding vector-like leptons to the Higgs Triplet Model influences Higgs decay processes and the decay patterns of doubly-charged Higgs bosons, with implications for experimental constraints.

Contribution

It introduces a parity symmetry to incorporate light vector leptons into the Higgs Triplet Model and studies their effects on Higgs decay rates and doubly-charged Higgs phenomenology.

Findings

Vector leptons can significantly alter h -> gamma gamma and h -> Z gamma decay rates.

Light vector leptons modify the decay patterns and mass restrictions of doubly-charged Higgs bosons.

The model provides new avenues for experimental searches and constraints.

Abstract

We analyze the phenomenological implications of introducing vector-like leptons on the Higgs sector in the Higgs Triplet Model. We impose only a parity symmetry which disallows mixing between the new states and the ordinary leptons. If the vector leptons are allowed to be relatively light, they enhance or suppress the decay rates of loop-dominated neutral Higgs bosons decays h -> gamma gamma and h -> Z gamma, and affect their correlation. An important consequence is that, for light vector leptons, the decay patterns of the the doubly-charged Higgs boson will be altered, modifying the restrictions on their masses.