Fate of the Sterile Neutrino

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dc.creatorBarger, V.
dc.creatorKayser, B.
dc.creatorLearned, J.
dc.creatorWeiler, T.
dc.creatorWhisnant, K.
dc.date2000-08-02
dc.date.accessioned2026-07-07T12:02:43Z
dc.date.available2026-07-07T12:02:43Z
dc.descriptionIn light of recent Super-Kamiokande data and global fits that seem to exclude both pure ν_μ\to ν_s oscillations of atmospheric neutrinos and pure ν_e \to ν_s oscillations of solar neutrinos (where ν_s is a sterile neutrino), we reconsider four-neutrino models to explain the LSND, atmospheric, and solar neutrino oscillation indications. We argue that the solar data, with the exception of the ^{37}Cl results, are suggestive of ν_e \to ν_s oscillations that average to a probability of approximately 1/2. In this interpretation, with two pairs of nearly degenerate mass eigenstates separated by order 1 eV, the day-night asymmetry, seasonal dependence, and energy dependence for ^8B neutrinos should be small. Alternatively, we find that four-neutrino models with one mass eigenstate widely separated from the others (and with small sterile mixings to active neutrinos) may now be acceptable in light of recently updated LSND results; the ^{37}Cl data can be accommodated in this model. For each scenario, we present simple four-neutrino mixing matrices that fit the stated criterion and discuss future tests.
dc.description11 pages, Latex2.09, no figures
dc.identifierhttps://arxiv.org/abs/hep-ph/0008019
dc.identifierhttp://arxiv.org/abs/hep-ph/0008019
dc.identifierPhys.Lett.B489:345-352,2000
dc.identifierdoi:10.1016/S0370-2693(00)00950-3
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/207531
dc.subjectHigh Energy Physics - Phenomenology
dc.titleFate of the Sterile Neutrino
dc.typetext

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