Fermiophobia in a Higgs Triplet Model

• Published in: arXiv.org
• Main Authors: Akeroyd, A G, Díaz, Marco A, Rivera, Maximiliano A, Romero, Diego
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 06.10.2010
• Subjects: Decay; Higgs bosons; Leptons; Physics - High Energy Physics - Phenomenology; Scalars
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1010.1160

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.