Solar and Atmospheric Four-Neutrino Oscillations

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dc.creatorGonzalez-Garcia, M. C.
dc.creatorMaltoni, M.
dc.creatorPeña-Garay, C.
dc.date2001-05-25
dc.date2001-05-28
dc.date.accessioned2026-07-07T06:29:46Z
dc.date.available2026-07-07T06:29:46Z
dc.descriptionWe present an analysis of the neutrino oscillation solutions of the solar and atmospheric neutrino problems in the framework of four-neutrino mixing where a sterile neutrino is added to the three standard ones and the mass spectra presents two separated doublets. Such scenarios allow for simultaneous transitions of solar $ν_e$, as well as atmospheric $ν_μ$, into active and sterile neutrinos controlled by the additional mixing angles $\vartheta_{23}$ and $\vartheta_{24}$, and they contain as limiting cases the pure solar $ν_e$-active and $ν_e$-sterile neutrino oscillations, and the pure atmospheric $ν_μ\toν_s$ and $ν_μ\toν_τ$ oscillations, respectively. We evaluate the allowed active-sterile admixture in both solar and atmospheric oscillations from the combined analysis. Our results show that, although the Super-Kamiokande data disfavour both the pure $ν_μ\toν_s$ atmospheric channel and the pure $ν_e\toν_s$ solar channel, the result from the combined analysis still favours close-to-pure active and sterile oscillations and disfavours oscillations into a near-maximal active-sterile admixture.
dc.descriptionReVTeX, 22 pages, 7 Figures. Some typos corrected
dc.identifierhttps://arxiv.org/abs/hep-ph/0105269
dc.identifierhttp://arxiv.org/abs/hep-ph/0105269
dc.identifierPhys.Rev. D64 (2001) 093001
dc.identifierdoi:10.1103/PhysRevD.64.093001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/98151
dc.subjectHigh Energy Physics - Phenomenology
dc.titleSolar and Atmospheric Four-Neutrino Oscillations
dc.typetext

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