Model-Independent Constraints on Non-Unitary Neutrino Mixing from High-Precision Long-Baseline Experiments

Abstract

Our knowledge on the active 3$\nu$ mixing angles (${\theta }_{12}$, ${\theta }_{13}$, and ${\theta }_{23}$) and the CP phase ${\delta }_{\mathrm{CP}}$ is becoming accurate day-by-day enabling us to test the unitarity of the leptonic mixing matrix with utmost precision. Future high-precision long-baseline experiments are going to play an important role in this direction. In this work, we study the impact of possible non-unitary neutrino mixing (NUNM) in the context of next-generation long-baseline experiments DUNE and T2HKK/JD+KD having one detector in Japan (T2HK/JD) and a second detector in Korea (KD). We estimate the sensitivities of these setups to place direct, model-independent, and competitive constraints on various NUNM parameters. We demonstrate the possible correlations between the NUNM parameters, ${\theta }_{23}$, and ${\delta }_{\mathrm{CP}}$. Our numerical results obtained using only far detector data and supported by simple approximate analytical expressions of the oscillation probabilities in matter, reveal that JD+KD has better sensitivities for $|{\alpha }_{21}|$ and ${\alpha }_{22}$ as compared to DUNE, due to its larger statistics in the appearance channel and less systematic uncertainties in the disappearance channel, respectively. For $|{\alpha }_{31}|$, $|{\alpha }_{32}|$, and ${\alpha }_{33}$, DUNE gives better constraints as compared to JD+KD, due to its larger matter effect and wider neutrino energy spectrum. For ${\alpha }_{11}$, both DUNE and JD+KD give similar bounds. We also show how much the bounds on the NUNM parameters can be improved by combining the prospective data from DUNE and JD+KD setups. We find that due to zero-distance effects, the near detectors alone can also constrain ${\alpha }_{11}$, $|{\alpha }_{21}|$, and ${\alpha }_{22}$ in both these setups. Finally, we observe that the ${\nu }_{\tau }$ appearance sample in DUNE can improve the constraints on $|{\alpha }_{32}|$ and ${\alpha }_{33}$.

arXiv comment39 pages, 10 figures, 11 tables, and 2 appendices. Published in JHEP

References in corpus (73)

• Neutrino Physics with JUNO
• The fate of hints: updated global analysis of three-flavor neutrino oscillations
• Simulation of long-baseline neutrino oscillation experiments with GLoBES
• 2020 Global reassessment of the neutrino oscillation picture
• New features in the simulation of neutrino oscillation experiments with GLoBES 3.0
• Hyper-Kamiokande Design Report
• Solar neutrino results in Super-Kamiokande-III
• The Strong CP Problem and Axions
• Neutrino Masses and Mixing: Evidence and Implications
• Getting the most from the statistical analysis of solar neutrino oscillations
• Superbeams versus Neutrino Factories
• Unitarity of the Leptonic Mixing Matrix
• Global constraints on heavy neutrino mixing
• Letter of Intent: The Hyper-Kamiokande Experiment --- Detector Design and Physics Potential ---
• Dynamical Left-Right Symmetry Breaking
• Measurement of Neutrino and Antineutrino Oscillations Using Beam and Atmospheric Data in MINOS
• Left-Right Symmetry Breaking in NJL Approach
• Measurement of electron antineutrino oscillation with 1958 days of operation at Daya Bay
• Physics Potential of a Long Baseline Neutrino Oscillation Experiment Using J-PARC Neutrino Beam and Hyper-Kamiokande
• Atmospheric neutrino oscillation analysis with external constraints in Super-Kamiokande I-IV
• Non-Unitarity, sterile neutrinos, and Non-Standard neutrino Interactions
• An Improved Measurement of Neutrino Oscillation Parameters by the NOvA Experiment
• Atmospheric Neutrino Oscillations and New Physics
• Observation of a first ${\nu }_{\tau }$ candidate in the OPERA experiment in the CNGS beam
• Measurement of Reactor Antineutrino Oscillation Amplitude and Frequency at RENO
• Measurement of Atmospheric Neutrino Oscillations at 6-56 GeV with IceCube DeepCore
• Neutrino Flux Predictions for the NuMI Beam
• Global Constraints on a Heavy Neutrino
• On the description of non-unitary neutrino mixing
• Parametrizing the lepton mixing matrix in terms of deviations from tri-bimaximal mixing
• Unitarity and the three flavour neutrino mixing matrix
• Quantifying the sensitivity of oscillation experiments to the neutrino mass ordering
• Non-unitary neutrino mixing and CP violation in the minimal inverse seesaw model
• TriMinimal Parametrization of the Neutrino Mixing Matrix
• Probing CP violation with non-unitary mixing in long-baseline neutrino oscillation experiments: DUNE as a case study
• Physics with Beam Tau-Neutrino Appearance at DUNE
• T2K ND280 Upgrade -- Technical Design Report
• A Long Baseline Neutrino Oscillation Experiment Using J-PARC Neutrino Beam and Hyper-Kamiokande
• Non-unitarity effects in a realistic low-scale seesaw model
• New ambiguity in probing CP violation in neutrino oscillations
• Measuring the Leptonic CP Phase in Neutrino Oscillations with Non-Unitary Mixing
• A framework for testing leptonic unitarity by neutrino oscillation experiments
• Current and Future Neutrino Oscillation Constraints on Leptonic Unitarity
• Non-unitary neutrino mixing in short and long-baseline experiments
• Tau neutrinos at DUNE: new strategies, new opportunities
• On the Role of the ${\nu }_{\tau }$ Appearance in DUNE in Constraining Standard Neutrino Physics and Beyond
• Searches for new physics at the Hyper-Kamiokande experiment
• Neutrino Oscillation Probabilities in Matter with Direct and Indirect Unitarity Violation in the Lepton Mixing Matrix
• Measuring the Sterile Neutrino CP Phase at DUNE and T2HK
• Leptonic Unitarity Triangles
• Signatures of a Light Sterile Neutrino in T2HK
• Global oscillation data analysis on the $3\nu$ mixing without unitarity
• New oscillation and scattering constraints on the tau row matrix elements without assuming unitarity
• Exploring the Potential of Short-Baseline Physics at Fermilab
• Experiment Simulation Configurations Approximating DUNE TDR
• Effect of Non Unitarity on Neutrino Mass Hierarchy determination at DUNE, NO$\nu$A and T2K
• The hierarchy problem of the electroweak Standard Model revisited
• Towards testing the unitarity of the 3X3 lepton flavor mixing matrix in a precision reactor antineutrino oscillation experiment
• New limits on neutrino non-standard mixings based on prescribed singular values
• Measuring the atmospheric neutrino oscillation parameters and constraining the 3+1 neutrino model with ten years of ANTARES data
• Tau Neutrino Identification in Atmospheric Neutrino Oscillations Without Particle Identification or Unitarity
• Probing Source and Detector NSI parameters at the DUNE Near Detector
• Neutrino mixing, interval matrices and singular values
• Discriminating sterile neutrinos and unitarity violation with CP invariants
• Long-baseline neutrino oscillation physics potential of the DUNE experiment
• Non-Unitarity at DUNE and T2HK with Charged and Neutral Current Measurements
• Measuring tau neutrino appearance probability via unitarity
• JUNO Physics and Detector
• Heavy neutrino mixing in the T2HK, the T2HKK and an extension of the T2HK with a detector at Oki Islands
• Neutrino Telescope at Yemilab, Korea
• Non-Unitarity vs sterile neutrinos at DUNE
• Searching for non-unitary neutrino oscillations in the present T2K and NO$\nu$A data
• New physics from oscillations at the DUNE near detector, and the role of systematic uncertainties

Cited by in corpus (13)

• The Present and Future Status of Heavy Neutral Leptons
• Improved sensitivities of ESS$\nu$SB from a two-detector fit
• Nonunitarity of the lepton mixing matrix at the European Spallation Source
• Neutrino masses from new seesaw models: Low-scale variants and phenomenological implications
• Constraining Lorentz Invariance Violation with Next-Generation Long-Baseline Experiments
• Constraints on non-unitary neutrino mixing in light of atmospheric and reactor neutrino data
• Precision measurements and tau neutrino physics in a future accelerator neutrino experiment
• Leptonic neutral-current probes in a short-distance DUNE-like setup
• Update on non-unitary mixing in the recent NO$\nu$A and T2K data
• Lepton-flavor changing decays and non-unitarity in the inverse seesaw mechanism
• Impact of unitarity violation on sensitivity of the leptonic CP phase at Hyper-Kamiokande and DUNE
• Probing Long-Range Forces in Neutrino Oscillations at the ESSnuSB Experiment
• Effects of virtual Majorana neutrinos on charged Lepton Flavor Violation decays from a seesaw variant with radiatively induced light neutrino masses