Neutrino Mass Hierarchy, Vacuum Oscillations, and Vanishing U_e3

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dc.creatorde Gouvea, Andre
dc.creatorJenkins, James
dc.creatorKayser, Boris
dc.date2005-03-08
dc.date2005-03-23
dc.date.accessioned2026-07-07T11:31:46Z
dc.date.available2026-07-07T11:31:46Z
dc.descriptionIs the relatively isolated member of the neutrino mass spectrum heavier or lighter than the two closely-spaced members? This question - the character of the neutrino mass hierarchy - is of great theoretical interest. All previously identified experiments for addressing it via neutrino oscillations require that the currently unknown size of the U_e3 element of the leptonic mixing matrix (parameterized by the unknown theta_13 mixing angle) be sufficiently large, and will utterly fail in the limit theta_13=0. For this reason, we explore alternative oscillation approaches that would still succeed even if theta_13 vanishes. We identify several alternatives that require neither a nonzero |U_e3| nor the presence of significant matter effects. All include multiple percent-level neutrino oscillation measurements, usually involving muon-neutrino (or antineutrino) disappearance and very long baselines. We comment on the degree of promise that these alternative approaches show.
dc.description15 pages revtex, five eps figures, references and acknowledgments added
dc.identifierhttps://arxiv.org/abs/hep-ph/0503079
dc.identifierhttp://arxiv.org/abs/hep-ph/0503079
dc.identifierPhys.Rev.D71:113009,2005
dc.identifierdoi:10.1103/PhysRevD.71.113009
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197377
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.titleNeutrino Mass Hierarchy, Vacuum Oscillations, and Vanishing U_e3
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