Impact of unitarity violation on sensitivity of the leptonic CP phase at Hyper-Kamiokande and DUNE

Abstract

We study the impact of unitarity violation on the sensitivity of the leptonic CP phase, ${\delta }_{CP}$, considering the next generation of long-baseline neutrino experiments, Hyper-Kamiokande and DUNE. By simulating near and far detectors and assuming different scenarios for non-unitarity, we verify how it can affect the sensitivity to measure the ${\delta }_{CP}$ violating phase. We also probe the capability of these experiments to constrain the non-unitarity parameters and how their capability could be improved if the impact of non-unitarity at both near and the far detectors were properly taken into account. We find that the Hyper-Kamiokande experiment is robust in the presence of non-unitarity mixing, achieving a sensitivity above $5\sigma$ for our all considered cases. On the other hand, DUNE suffers somewhat more impact due to unitarity violation, reaching a sensitivity below 5$\sigma$ for some values of ${\delta }_{CP}$. However, depending on the scenario adopted for non-unitarity, DUNE demonstrates robustness in the sensitivity to ${\delta }_{CP}$ phase.

References in corpus (28)

• 2020 Global reassessment of the neutrino oscillation picture
• New features in the simulation of neutrino oscillation experiments with GLoBES 3.0
• Measurement of the solar neutrino capture rate with gallium metal. III: Results for the 2002--2007 data-taking period
• Statistical Significance of the Gallium Anomaly
• Unitarity of the Leptonic Mixing Matrix
• CP Violation and Neutrino Oscillations
• Non-unitarity of the leptonic mixing matrix: Present bounds and future sensitivities
• CP-violation from non-unitary leptonic mixing
• Non-unitary neutrino mixing and CP violation in the minimal inverse seesaw model
• Correlation between the Charged Current Interactions of Light and Heavy Majorana Neutrinos
• Probing non-unitary mixing and CP-violation at a Neutrino Factory
• Systematic uncertainties in long-baseline neutrino oscillations for large ${\theta }_{13}$
• The gallium anomaly revisited
• A framework for testing leptonic unitarity by neutrino oscillation experiments
• Current and Future Neutrino Oscillation Constraints on Leptonic Unitarity
• Flavour in heavy neutrino searches at the LHC
• On the impact of systematical uncertainties for the CP violation measurement in superbeam experiments
• Testing sterile neutrino mixing with present and future solar neutrino data
• Global oscillation data analysis on the $3\nu$ mixing without unitarity
• Probing CP violation with T2K, NO$\nu$A and DUNE in the presence of non-unitarity
• Long-lived heavy neutral leptons with a displaced shower signature at CMS
• Model-Independent Constraints on Non-Unitary Neutrino Mixing from High-Precision Long-Baseline Experiments
• Non-unitary Leptonic Flavor Mixing and CP Violation in Neutrino-antineutrino Oscillations
• A full parametrization of the $9\times 9$ active-sterile flavor mixing matrix in the inverse or linear seesaw scenario of massive neutrinos
• Non-unitary three-neutrino mixing in the early Universe
• Nonunitarity of the lepton mixing matrix at the European Spallation Source
• Constraints on non-unitary neutrino mixing in light of atmospheric and reactor neutrino data
• Analytic Neutrino Oscillation Probabilities