Fermiophobia in a Higgs Triplet Model

Understand

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.