Decay properties of a class of doubly charged Higgs bosons

TL;DR

This paper investigates the decay characteristics of a specific class of doubly charged Higgs bosons predicted by a gauge symmetry model, highlighting their dominant decay into taus and unique coupling features.

Contribution

It provides a detailed analysis of the decay properties and coupling features of doubly charged Higgs bosons within a specific gauge symmetry model, contrasting with the Higgs triplet model.

Findings

Decays into taus dominate over 99.5%.

Couplings to gauge bosons are suppressed or zero.

Decay rates relate simply to Higgs masses and lepton masses.

Abstract

We study the leptonic decays of a doubly charged Higgs bosons class which is predicted by a model based on the SU(3)_C\otimesSU(2)_L\otimesU(1)_N electroweak gauge symmetry. In contrast to other models, decays into taus are largely dominant (99.5 % or more). Coupling of these scalars to two standard charged gauge bosons are either zero or very suppressed. Couplings to two different flavor of charged leptons do not occur. Some coupling features imposed by symmetry and representation content lead to simple relationships between decay rates and doubly charged Higgs masses. Some of the parameters depend only on the decay widths and on the charged lepton masses. In order to clarify the relevance of our results, some aspects of this model are compared with the Higgs triplet model.