English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Our knowledge on the active 3$\nu$ mixing angles ($\theta_{12}$,$\theta_{13}$, and $\theta_{23}$) and the CP phase $\delta_{\mathrm{CP}}$ isbecoming accurate day-by-day enabling us to test the unitarity of the leptonicmixing matrix with utmost precision. Future high-precision long-baselineexperiments are going to play an important role in this direction. In thiswork, we study the impact of possible non-unitary neutrino mixing (NUNM) in thecontext of next-generation long-baseline experiments DUNE and T2HKK/JD+KDhaving one detector in Japan (T2HK/JD) and a second detector in Korea (KD). Weestimate the sensitivities of these setups to place direct, model-independent,and competitive constraints on various NUNM parameters. We demonstrate thepossible correlations between the NUNM parameters, $\theta_{23}$, and$\delta_{\mathrm{CP}}$. Our numerical results obtained using only far detectordata and supported by simple approximate analytical expressions of theoscillation probabilities in matter, reveal that JD+KD has better sensitivitiesfor $|\alpha_{21}|$ and $\alpha_{22}$ as compared to DUNE, due to its largerstatistics in the appearance channel and less systematic uncertainties in thedisappearance channel, respectively. For $|\alpha_{31}|$, $|\alpha_{32}|$, and$\alpha_{33}$, DUNE gives better constraints as compared to JD+KD, due to itslarger 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 onthe NUNM parameters can be improved by combining the prospective data from DUNEand JD+KD setups. We find that due to zero-distance effects, the near detectorsalone can also constrain $\alpha_{11}$, $|\alpha_{21}|$, and $\alpha_{22}$ inboth these setups. Finally, we observe that the $\nu_\tau$ appearance sample inDUNE can improve the constraints on $|\alpha_{32}|$ and $\alpha_{33}$.

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