Measuring the Sterile Neutrino CP Phase at DUNE and T2HK

Abstract

The CP phases associated with the sterile neutrino cannot be measured in the dedicated short-baseline experiments being built to test the sterile neutrino hypothesis. On the other hand, these phases can be measured in long-baseline experiments, even though the main goal of these experiments is not to test or measure sterile neutrino parameters. In particular, the sterile neutrino phase ${\delta }_{24}$ affects the charged-current electron appearance data in long-baseline experiment. In this paper we show for the first time how well the sterile neutrino phase ${\delta }_{24}$ can be measured by the next-generation long-baseline experiments DUNE, T2HK (and T2HKK). We also show the expected precision with which this sterile phase can be measured by combining the DUNE data with data from T2HK or T2HKK. We also present the sensitivity of these experiments to the sterile mixing angles, both by themselves, as well as when DUNE is combined with T2HK or T2HKK.

Published in EPJ C with minor corrections

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• Model-Independent Constraints on Non-Unitary Neutrino Mixing from High-Precision Long-Baseline Experiments
• The Effect of a Light Sterile Neutrino at NO$\nu$A and DUNE
• Exploring NSI degeneracies in long-baseline experiments
• Matter Effect of Light Sterile Neutrino: An Exact Analytical Approach
• Physics Potential of ESS$\nu$SB in the presence of a Light Sterile Neutrino
• A review of the tension between the T2K and NO$\nu$A appearance data and hints to new physics
• Study of light sterile neutrino at the long-baseline experiment options at KM3NeT
• Sensitivity to light sterile neutrinos at ESSnuSB
• Prospects of light sterile neutrino searches in long-baseline neutrino oscillations
• Degeneracy resolution capabilities of NO$\nu$A and DUNE in the presence of light sterile neutrino
• Non-Unitarity at DUNE and T2HK with Charged and Neutral Current Measurements
• On ${\theta }_{23}$ Octant Measurement in $3+1$ Neutrino Oscillations in T2HKK
• Light sterile neutrinos and their implications on currently running long-baseline and neutrinoless double beta decay experiments
• Prospects and requirements of opaque detectors in accelerator neutrino experiments
• Sterile Neutrinos: Propagation in Matter and Sensitivity to Sterile Mass Ordering
• Exploring the new physics phases in 3+1 scenario in neutrino oscillation experiments
• Updated sensitivity of DUNE in 3+1 scenario with far and near detectors
• Effects of tau-neutrino detection on non-standard interactions at DUNE with a short discussion on the nature of neutrino mixing
• Sterile sector impacting the correlations and degeneracies among mixing parameters at the Deep Underground Neutrino Experiment
• Impact of CP violation searches at MOMENT experiment with sterile neutrinos
• New sources of leptonic CP violation at the DUNE neutrino experiment