A 4-neutrino model with a Higgs triplet

Details A 4-neutrino model with a Higgs triplet A 4-neutrino model with a Higgs triplet

1999-05-12

arxiv.org/abs/hep-ph/9905320v1

Eur.Phys.J.C13:125-132,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 14 pages, no figures

Scientific paper

10.1007/s100520000255

We take as a starting point the Gelmini -- Roncadelli model enlarged by a term with explicit lepton number violation in the Higgs potential and add a neutrino singlet field coupled via a scalar doublet to the usual leptons. This scenario allows us to take into account all three present indications in favour of neutrino oscillations provided by the solar, atmospheric and LSND neutrino oscillation experiments. Furthermore, it suggests a model which reproduces naturally one of the two 4-neutrino mass spectra favoured by the data. In this model the solar neutrino problem is solved by large mixing MSW \nu_e\to\nu_\tau transitions and the atmospheric neutrino problem by transitions of \nu_\mu into a sterile neutrino.

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