Back to (Mass-)Square(d) One: The Neutrino Mass Ordering in Light of Recent Data

Abstract

We inspect recently updated neutrino oscillation data -- specifically coming from the Tokai to Kamioka and NuMI Off-axis ${\nu }_e$ Appearance experiments -- and how they are analyzed to determine whether the neutrino mass ordering is normal ($m_1<m_2<m_3$) or inverted ($m_3<m_1<m_2$). We show that, despite previous results giving a strong preference for the normal ordering, with the newest data from T2K and NOvA, this preference has all but vanished. Additionally, we highlight the importance of this result for non-oscillation probes of neutrinos, including neutrinoless double beta decay and cosmology. Future experiments, including JUNO, DUNE, and T2HK will provide valuable information and determine the mass ordering at a high confidence level.

arXiv comment5 pages, 3 figures + 1 appendix (1 figure). Updated NOvA analysis, matches published version

References in corpus (26)

• Neutrino Physics with JUNO
• The fate of hints: updated global analysis of three-flavor neutrino oscillations
• Global analysis of three-flavour neutrino oscillations: synergies and tensions in the determination of theta_23, delta_CP, and the mass ordering
• An improved upper limit on the neutrino mass from a direct kinematic method by KATRIN
• Combined Analysis of all Three Phases of Solar Neutrino Data from the Sudbury Neutrino Observatory
• Hyper-Kamiokande Design Report
• First measurement of neutrino oscillation parameters using neutrinos and antineutrinos by NOvA
• CP Violation and Neutrino Oscillations
• Measurement of electron antineutrino oscillation with 1958 days of operation at Daya Bay
• Another possible way to determine the Neutrino Mass Hierarchy
• Atmospheric neutrino oscillation analysis with external constraints in Super-Kamiokande I-IV
• Search for CP violation in Neutrino and Antineutrino Oscillations by the T2K experiment with $2.2\times 10^{21}$ protons on target
• Neutrino Mass Ordering from Oscillations and Beyond: 2018 Status and Future Prospects
• Neutrino physics with the PTOLEMY project: active neutrino properties and the light sterile case
• New constraints on oscillation parameters from ${\nu }_e$ appearance and ${\nu }_{\mu }$ disappearance in the NOvA experiment
• A COHERENT enlightenment of the neutrino Dark Side
• Constraints on Oscillation Parameters from ${\nu }_e$ Appearance and ${\nu }_{\mu }$ Disappearance in NOvA
• Determining the neutrino mass with Cyclotron Radiation Emission Spectroscopy - Project 8
• Curtailing the Dark Side in Non-Standard Neutrino Interactions
• Physics Potentials with the Second Hyper-Kamiokande Detector in Korea
• Addendum to: Global constraints on absolute neutrino masses and their ordering
• Deep Underground Neutrino Experiment (DUNE), Far Detector Technical Design Report, Volume II: DUNE Physics
• Determining Neutrino Mass Hierarchy by Precision Measurements in Electron and Muon Neutrino Disappearance Experiments
• Generalized mass ordering degeneracy in neutrino oscillation experiments
• Neutrino Mass Ordering at DUNE: an Extra $\nu$-Bonus
• Search for Electron Antineutrino Appearance in a Long-baseline Muon Antineutrino Beam

Cited by in corpus (36)

• 2020 Global reassessment of the neutrino oscillation picture
• An Improved Measurement of Neutrino Oscillation Parameters by the NOvA Experiment
• Direct Measurements of Neutrino Mass
• Determining the Neutrino Mass Ordering and Oscillation Parameters with KM3NeT/ORCA
• The Future of High-Energy Astrophysical Neutrino Flavor Measurements
• Non-unitary neutrino mixing in short and long-baseline experiments
• Combined analysis of neutrino decoherence at reactor experiments
• New reactor data improves robustness of neutrino mass ordering determination
• Looking for Lorentz invariance violation (LIV) in the latest long baseline accelerator neutrino oscillation data
• Physics potentials with a combined sensitivity of T2K-II, NO$\nu$A extension and JUNO
• A Survey of Neutrino Flavor Models and the Neutrinoless Double Beta Decay Funnel
• Very Light Sterile Neutrinos at NOvA and T2K
• A review of the tension between the T2K and NO$\nu$A appearance data and hints to new physics
• Three-flavor collective neutrino conversions with multi-azimuthal-angle instability in an electron-capture supernova model
• Spey: smooth inference for reinterpretation studies
• Energy-Dependent Neutrino Mixing Parameters at Oscillation Experiments
• A Mass Ordering Sum Rule for the Neutrino Disappearance Channels in T2K, NOvA and JUNO
• $B-L$ model with $A_4\times Z_3\times Z_4$ symmetry for $3+1$ active$-$sterile neutrino mixing
• A comparison of Bayesian sampling algorithms for high-dimensional particle physics and cosmology applications
• Measuring Oscillations with A Million Atmospheric Neutrinos
• Imprint of massive neutrinos on Persistent Homology of large-scale structure
• Pseudo-Dirac Neutrinos and Relic Neutrino Matter Effect on the High-energy Neutrino Flavor Composition
• Synergies and Prospects for Early Resolution of the Neutrino Mass Ordering
• Sterile Neutrinos: Propagation in Matter and Sensitivity to Sterile Mass Ordering
• Lepton masses and mixings, and muon anomalous magnetic moment in an extended $B-L$ model with type I seesaw mechanism
• Interpretation of the XENON1T excess in the model with decaying sterile neutrinos
• Neutrino phenomenology and keV dark matter in 2HDM with $A_4$ symmetry
• A $\nu$ Approach to Analyzing Neutrino Data in the $\mathbf{R}$-Parity-Violating MSSM
• Testing the dark side of neutrino oscillations with the solar neutrino fog at Dark Matter experiments
• Alleviating the present tension between T2K and NO$\nu$A with nonstandard neutrino interactions
• Octant of ${\theta }_{23}$, MH, $0\nu \beta \beta$ decay and vacuum alignment of $A_4$ flavour symmetry in an inverse seesaw model
• The Universe at the MeV era: neutrino evolution and cosmological observables
• Notes on symmetries in particle physics
• MiniBooNE Neutrino Oscillation Search Results and Predicted Background Events
• Compact representation for electroweak lepton sector
• JUNO's prospects for determining the neutrino mass ordering