Three flavor neutrino oscillation analysis of atmospheric neutrinos in Super-Kamiokande
- Kamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu, 506-1205 (Japan)
- Research Center for Cosmic Neutrinos, Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582 (Japan)
We report on the results of a three-flavor oscillation analysis using Super-Kamiokande I atmospheric neutrino data, with the assumption of one mass scale dominance ({delta}m{sub 12}{sup 2}=0). No significant flux change due to matter effect, which occurs when neutrinos propagate inside the Earth for {theta}{sub 13}{ne}0, has been seen either in a multi-GeV {nu}{sub e}-rich sample or in a {nu}{sub {mu}}-rich sample. Both normal and inverted mass hierarchy hypotheses are tested and both are consistent with observation. Using Super-Kamiokande data only, 2-dimensional 90% confidence allowed regions are obtained: mixing angles are constrained to sin{sup 2}{theta}{sub 13}<0.14 and 0.37<sin{sup 2}{theta}{sub 23}<0.65 for the normal mass hierarchy. Weaker constraints, sin{sup 2}{theta}{sub 13}<0.27 and 0.37<sin{sup 2}{theta}{sub 23}<0.69, are obtained for the inverted mass hierarchy case.
- OSTI ID:
- 20869209
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 74, Issue 3; Other Information: DOI: 10.1103/PhysRevD.74.032002; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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