Fermiophobia in a Higgs Triplet Model

Details Fermiophobia in a Higgs Triplet Model Fermiophobia in a Higgs Triplet Model

2010-10-06

arxiv.org/abs/1010.1160v1

Phys.Rev.D83:095003,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

25 pages, 23 figures, 3 tables

Scientific paper

10.1103/PhysRevD.83.095003

A Fermiophobic Higgs boson can arise in models with an extended Higgs sector, such as models with scalars in an isospin triplet representation. In a specific model with a scalar triplet and spontaneous violation of lepton number induced by a scalar singlet field, we show that fermiophobia is not a fine-tuned situation, unlike in Two Higgs Doublet Models. We study distinctive signals of fermiophobia which can be probed at the LHC. For the case of a small Higgs mass a characteristic signal would be a moderate B(H ->\gamma\gamma) accompanied by a large B(H -> JJ) (where J is a Majoron), the latter being an invisible decay. For the case of a large Higgs mass there is the possibility of dominant H -> ZZ, WW and suppressed H -> JJ decay modes. In this situation, B(H -> ZZ) is larger than B(H -> WW), which differs from the SM prediction.

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