Atmospheric neutrino oscillation analysis with external constraints in Super-Kamiokande I-IV

2017/10/31 by Kamiokande Collaboration, K. Abe, C. Bronner +178 · 3 citations
Physics and Astronomy · #hep-ex

paper · pdf · doi:10.1103/physrevd.97.072001

published as Phys. Rev. D 97, 072001 (2018) · 22 pages, 29 figures, final version submitted for publication

arxiv created 2018/06/27 · arxiv updated 2018/06/28

Abstract

An analysis of atmospheric neutrino data from all four run periods of \superk optimized for sensitivity to the neutrino mass hierarchy is presented. Confidence intervals for Δm²₃₂, sin² θ₂₃, sin² θ₁₃ and δ_CP are presented for normal neutrino mass hierarchy and inverted neutrino mass hierarchy hypotheses based on atmospheric neutrino data alone. Additional constraints from reactor data on θ₁₃ and from published binned T2K data on muon neutrino disappearance and electron neutrino appearance are added to the atmospheric neutrino fit to give enhanced constraints on the above parameters. Over the range of parameters allowed at 90% confidence level, the normal mass hierarchy is favored by between 91.5% and 94.5% based on the combined result.

Cited by

• First study of neutrino angle reconstruction using quasielastic-like interactions in MicroBooNE
• A search for lepton-flavour violating τ→ 3μ decays with the ATLAS detector
• Radiative Symmetry Breaking with a Scale Invariant Seesaw