Quantum Decoherence effects on precision measurements at DUNE and T2HK

TL;DR

This paper examines how neutrino quantum decoherence could affect the precision of parameter measurements in DUNE and T2HK experiments, highlighting DUNE's sensitivity to decoherence and the benefits of combined analysis.

Contribution

It provides a comparative analysis of decoherence effects on neutrino measurements at DUNE and T2HK, and demonstrates the advantage of combined data for robust parameter estimation.

Findings

Decoherence impacts measurements more in DUNE than T2HK.

DUNE has higher sensitivity to decoherence effects.

Combined analysis improves measurement robustness.

Abstract

We investigate the potential impact of neutrino quantum decoherence on the precision measurements of standard neutrino oscillation parameters in the DUNE and T2HK experiments. We show that the measurement of $\delta_\text{CP}$, $\sin^2\theta_{13}$ and $\sin^2\theta_{23}$ is stronger effected in DUNE than in T2HK. On the other hand, DUNE would have a better sensitivity than T2HK to observe decoherence effects. By performing a combined analysis of DUNE and T2HK we show that a robust measurement of standard parameters would be possible, which is not guaranteed with DUNE data alone.