Determining Neutrino Mass Hierarchy by Precision Measurements in Electron and Muon Neutrino Disappearance Experiments

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dc.creatorMinakata, H.
dc.creatorNunokawa, H.
dc.creatorParke, S. J.
dc.creatorFunchal, R. Zukanovich
dc.date2006-07-25
dc.date.accessioned2026-07-07T11:43:39Z
dc.date.available2026-07-07T11:43:39Z
dc.descriptionRecently a new method for determining the neutrino mass hierarchy by comparing the effective values of the atmospheric Δm^2 measured in the electron neutrino disappearance channel, Δm^2(ee), with the one measured in the muon neutrino disappearance channel, Δm^2(μμ), was proposed. If Δm^2(ee) is larger (smaller) than Δm^2(μμ) the hierarchy is of the normal (inverted) type. We re-examine this proposition in the light of two very high precision measurements: Δm^2(μμ) that may be accomplished by the phase II of the Tokai-to-Kamioka (T2K) experiment, for example, and Δm^2(ee) that can be envisaged using the novel Mossbauer enhanced resonant \barν_e absorption technique. Under optimistic assumptions for the systematic uncertainties of both measurements, we estimate the parameter region of (θ_13, δ) in which the mass hierarchy can be determined. If θ_13 is relatively large, sin^2 2θ_13 \gsim 0.05, and both of Δm^2(ee) and Δm^2(μμ) can be measured with the precision of \sim 0.5 % it is possible to determine the neutrino mass hierarchy at > 95% CL for 0.3 π\lsim δ\lsim 1.7 πfor the current best fit values of all the other oscillation parameters.
dc.description12 pages, 6 postscript figures
dc.identifierhttps://arxiv.org/abs/hep-ph/0607284
dc.identifierhttp://arxiv.org/abs/hep-ph/0607284
dc.identifierPhys.Rev.D74:053008,2006
dc.identifierdoi:10.1103/PhysRevD.74.053008
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/201314
dc.subjectHigh Energy Physics - Phenomenology
dc.titleDetermining Neutrino Mass Hierarchy by Precision Measurements in Electron and Muon Neutrino Disappearance Experiments
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