Confronting solutions to the atmospheric neutrino anomaly involving large angle $ν_μ \to ν_e$ oscillations with SuperKamiokande and CHOOZ

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dc.creatorFoot, R.
dc.creatorVolkas, R. R.
dc.creatorYasuda, O.
dc.date1998-02-10
dc.date1998-04-20
dc.date.accessioned2026-07-07T04:03:27Z
dc.date.available2026-07-07T04:03:27Z
dc.descriptionNeutrino oscillation scenarios involving large angle $ν_μ \to ν_e$ oscillations are disfavoured in the parameter range $Δm^2/eV^2 >~ 10^{-3}$ by recent results from the CHOOZ reactor-based $\barν_e$ disappearance experiment. For this reason we extend our previous work on up-down asymmetries for various oscillation scenarios by computing up-down asymmetries and the R ratio for the entire conceivable range $10^{-4} - 10^{-1} eV^2$ of $Δm^2$. Matter effects in the Earth play a crucial role. We perform a $χ^2$ fit to the data. We find that, because of the matter effect, the three-flavour maximal mixing model provides a reasonable fit to SuperKamiokande and CHOOZ data provided that the relevant $Δm^2$ is in the range $4 \times 10^{-4} ~< Δm^2/eV^2 ~< 1.5 \times 10^{-3}$.
dc.description16 pages, 8 figures, Latex; numerical error for one of the cases considered is corrected; conclusions are unchanged
dc.identifierhttps://arxiv.org/abs/hep-ph/9802287
dc.identifierhttp://arxiv.org/abs/hep-ph/9802287
dc.identifierPhys.Lett. B433 (1998) 82-87
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/47663
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.titleConfronting solutions to the atmospheric neutrino anomaly involving large angle $ν_μ \to ν_e$ oscillations with SuperKamiokande and CHOOZ
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