The Dark Side of the Solar Neutrino Parameter Space

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dc.creatorde Gouvea, Andre
dc.creatorFriedland, Alexander
dc.creatorMurayama, Hitoshi
dc.date2000-02-07
dc.date2000-02-20
dc.date.accessioned2026-07-07T11:34:58Z
dc.date.available2026-07-07T11:34:58Z
dc.descriptionResults of neutrino oscillation experiments have always been presented on the (sin^2 2theta, Delta m^2) parameter space for the case of two-flavor oscillations. We point out, however, that this parameterization misses the half of the parameter space pi/4 < theta <= pi/2 (``the dark side''), which is physically inequivalent to the region 0 <= theta <= pi/4 (``the light side'') in the presence of matter effects. The MSW solutions to the solar neutrino problem can extend to the dark side, especially if we take the conservative attitude to allow higher confidence levels, ignore some of the experimental results in the fits, or relax theoretical predictions. Furthermore even the so-called ``vacuum oscillation'' solution distinguishes the dark and the light sides. We urge experimental collaborations to present their results on the entire parameter space.
dc.description4 pages, 3 figures, uses psfig. Fixed typos in Eq. (3). An imprecise comment in the footnote removed
dc.identifierhttps://arxiv.org/abs/hep-ph/0002064
dc.identifierhttp://arxiv.org/abs/hep-ph/0002064
dc.identifierPhys.Lett.B490:125-130,2000
dc.identifierdoi:10.1016/S0370-2693(00)00989-8
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/198443
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Experiment
dc.subjectNuclear Experiment
dc.subjectNuclear Theory
dc.titleThe Dark Side of the Solar Neutrino Parameter Space
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