Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 13, Issue 1, Pages 125-132Publisher
SPRINGER
DOI: 10.1007/s100520000255
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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 that is coupled via a scalar doublet to the usual leptons. This scenario allows us to take into account all three present indications in favor 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 favored by the data. In this model, the solar neutrino problem is solved by large mixing MSW nu(e) --> nu(tau) transitions, and the atmospheric neutrino problem by transitions of nu(mu) into a sterile neutrino.
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