Título:
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Phenomenology of maximal and near-maximal lepton mixing
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Autor/a:
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González García, Ma. Concepción; Peña-Garay, C.; Nir, Yosef; Smirnov, Alexei Yu
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Otros autores:
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Universitat de Barcelona |
Abstract:
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We study the phenomenological consequences of maximal and near-maximal mixing of the electron neutrino with other ($x$=tau and/or muon) neutrinos. We describe the deviations from maximal mixing in terms of a parameter $\epsilon\equiv1-2\sin^2\theta_{ex}$ and quantify the present experimental status for $|\epsilon|<0.3$. We find that the global analysis of solar neutrino data allows maximal mixing with confidence level better than 99% for $10^{-8}$ eV$^2\lsim\Delta m^2\lsim2\times10^{-7}$ eV$^2$. In the mass ranges $\Delta m^2\gsim 1.5\times10^{-5}$ eV$^2$ and $4\times10^{-10}$ eV$^2\lsim\Delta m^2\lsim2\times10^{-7}$ eV$^2$ the full interval $|\epsilon|<0.3$ is allowed within 4$\sigma$(99.995 % CL). We suggest ways to measure $\epsilon$ in future experiments. The observable that is most sensitive to $\epsilon$ is the rate [NC]/[CC] in combination with the Day-Night asymmetry in the SNO detector. With theoretical and statistical uncertainties, the expected accuracy after 5 years is $\Delta \epsilon\sim 0.07$. We also discuss the effects of maximal and near-maximal $\nu_e$-mixing in atmospheric neutrinos, supernova neutrinos, and neutrinoless double beta decay. |
Materia(s):
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-Fenomenologia (Física) -Partícules (Física nuclear) -Astrofísica nuclear -Leptons -Radiació solar -Phenomenological theory (Physics) -Particles (Nuclear physics) -Nuclear astrophysics -Leptons (Nuclear physics) -Solar radiation |
Derechos:
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(c) The American Physical Society, 2000
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Tipo de documento:
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Artículo Artículo - Versión publicada |
Editor:
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The American Physical Society
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Compartir:
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