Update on non-unitary mixing in the recent NOνA and T2K data

Key Points

The analysis indicates stronger constraints on unitary violation from recent NOνA and T2K data.
Best-fit values for both standard and non-standard mixing parameters were derived after thorough data analysis.
The tension between NOνA and T2K results for normal mass hierarchy can decrease with specific non-unitary mixing conditions.
Future sensitivity assessments for NOνA, T2K, and DUNE are detailed, highlighting areas of potential discovery.

Abstract

In this paper, we have tested the non-unitary mixing hypothesis with the latest data from NOνA and T2K experiments. We have also analysed their combined data. We have provided the best-fit values of the standard and non standard parameters after the analysis. 90% limits on the non-unitary mixing parameters have also been provided. The constraints on unitary violation is stronger, compared to the constraints obtained from previous data from NOνA and T2K. The tension between NOνA and T2K at the 1 σ for normal mass hierarchy can be reduced for non-unitary mixing due to α10, albeit for a value of |α10| larger than the present global 90% limit. Additionally a study of the future sensitivity of NOνA, T2K and DUNE has been provided.

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Cite This Study

Yu et al. (Thu,) studied this question.

synapsesocial.com/papers/69a75a0ac6e9836116a1f87d https://doi.org/https://doi.org/10.1016/j.nuclphysb.2026.117303

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