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Title: Establishing atmospheric neutrino oscillations with Super-Kamiokande

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Journal Article: Published Article
Journal Name:
Nuclear Physics. B
Additional Journal Information:
Journal Volume: 908; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-05-31 10:00:18; Journal ID: ISSN 0550-3213
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Citation Formats

Kajita, T., Kearns, E., and Shiozawa, M.. Establishing atmospheric neutrino oscillations with Super-Kamiokande. Netherlands: N. p., 2016. Web. doi:10.1016/j.nuclphysb.2016.04.017.
Kajita, T., Kearns, E., & Shiozawa, M.. Establishing atmospheric neutrino oscillations with Super-Kamiokande. Netherlands. doi:10.1016/j.nuclphysb.2016.04.017.
Kajita, T., Kearns, E., and Shiozawa, M.. 2016. "Establishing atmospheric neutrino oscillations with Super-Kamiokande". Netherlands. doi:10.1016/j.nuclphysb.2016.04.017.
title = {Establishing atmospheric neutrino oscillations with Super-Kamiokande},
author = {Kajita, T. and Kearns, E. and Shiozawa, M.},
abstractNote = {},
doi = {10.1016/j.nuclphysb.2016.04.017},
journal = {Nuclear Physics. B},
number = C,
volume = 908,
place = {Netherlands},
year = 2016,
month = 7

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Publisher's Version of Record at 10.1016/j.nuclphysb.2016.04.017

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  • We consider {nu}{sub {mu}}{yields}{nu}{sub {tau}} oscillations in the context of the mass varying neutrino (MaVaN) model, where the neutrino mass can vary depending on the electron density along the flight path of the neutrino. Our analysis assumes a mechanism with dependence only upon the electron density, hence ordinary matter density, of the medium through which the neutrino travels. Fully-contained, partially-contained and upward-going muon atmospheric neutrino data from the Super-Kamiokande detector, taken from the entire SK-I period of 1489 live days, are compared to MaVaN model predictions. We find that, for the case of 2-flavor oscillations, and for the specific modelsmore » tested, oscillation independent of electron density is favored over density dependence. Assuming maximal mixing, the best-fit case and the density-independent case do not differ significantly.« less
  • We report the result of a search for neutrino oscillations using precise measurements of the recoil electron energy spectrum and zenith angle variations of the solar neutrino flux from 1258 days of neutrino-electron scattering data in Super-Kamiokande. The absence of significant zenith angle variation and spectrum distortion places strong constraints on neutrino mixing and mass difference in a flux-independent way. Using the Super-Kamiokande flux measurement in addition, two allowed regions at large mixing are found.
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  • We present a combined analysis of fully-contained, partially-contained and upward-going muon atmospheric neutrino data from a 1489 d exposure of the Super-Kamiokande detector. The data samples span roughly five decades in neutrino energy, from 100 MeV to 10 TeV. A detailed Monte Carlo comparison is described and presented. The data is fit to the Monte Carlo expectation, and is found to be consistent with neutrino oscillations of {nu}{sub {mu}}{r_reversible}{nu}{sub {tau}} with sin{sup 2}2{theta}>0.92 and 1.5x10{sup -3}<{delta}m{sup 2}<3.4x10{sup -3} eV{sup 2} at 90% confidence level.
  • 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}<0.65more » 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.« less