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We study the impact of invisible neutrino decay in the measurements of octant and mass hierarchy sensitivities at long-baseline neutrino experiments. DUNE (Deep Underground Neutrino Experiment) and T2HKK (Tokai-to-Hyper-Kamiokande-to-Korea) are two upcoming long baseline experiments that can contribute a lot to precision measurements in the neutrino sector. Assuming \(\nu _3\) to be unstable, we show the effect of the invisible neutrino decay in the measurements of the sensitivities at the far detector of these experiments. We have also performed a combined analysis of the two experiments. The octant sensitivity increases, while mass hierarchy sensitivity changes very slightly in the presence of invisible neutrino decay. The value of the decay parameter \({\tau _3}/{m_3}\) considered in this work is \(2.2\times 10^{-11}\) s/eV.

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Sensitivities at Long-Baseline Experiments in the Light of Invisible Neutrino Decay

  • 会议论文

  • 发表日期：

    2025年

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  • Zannatun Firdowzy Dey,
  • Debajyoti Dutta

摘要

We study the impact of invisible neutrino decay in the measurements of octant and mass hierarchy sensitivities at long-baseline neutrino experiments. DUNE (Deep Underground Neutrino Experiment) and T2HKK (Tokai-to-Hyper-Kamiokande-to-Korea) are two upcoming long baseline experiments that can contribute a lot to precision measurements in the neutrino sector. Assuming \(\nu _3\) to be unstable, we show the effect of the invisible neutrino decay in the measurements of the sensitivities at the far detector of these experiments. We have also performed a combined analysis of the two experiments. The octant sensitivity increases, while mass hierarchy sensitivity changes very slightly in the presence of invisible neutrino decay. The value of the decay parameter \({\tau _3}/{m_3}\) considered in this work is \(2.2\times 10^{-11}\) s/eV.