Three flavor neutrino oscillation analysis of the Superkamiokande atmospheric neutrino data

Abstract

Superkamiokande atmospheric neutrino data for 535 days are analyzed in the framework of three flavor oscillations with mass hierarchy. It is shown that the best fit point is very close to the pure maximal ${\nu }_{\mu }\leftrightarrow {\nu }_{\tau }$ case and $\Delta m^2\simeq 7\times 10^{-3}$ eV${}^2$. The allowed region at 90 %CL is given and the implications to the long baseline experiments are briefly discussed.

8 pages + 1 Table + 28 PostScript figures updated using 535 day data

References in corpus (8)

• Evidence for oscillation of atmospheric neutrinos
• Initial Results from the CHOOZ Long Baseline Reactor Neutrino Oscillation Experiment
• Measurement of a small atmospheric ${\nu }_{\mu }/{\nu }_e$ ratio
• Comparing and contrasting the ${\nu }_{\mu }\to {\nu }_{\tau }$ and ${\nu }_{\mu }\to {\nu }_s$ solutions to the atmospheric neutrino problem with SuperKamiokande data
• Atmospheric neutrino oscillations with three neutrinos and a mass hierarchy
• Up-down atmospheric neutrino flux asymmetry predictions for various neutrino oscillation scenarios
• Zenith distribution of atmospheric neutrino events and electron neutrino mixing
• Testing maximal electron and muon neutrino oscillations with sub-GeV SuperKamiokande atmospheric neutrino data

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