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The observed signature of neutrino oscillation indicates the presence of massive neutrinos in the Standard Model (SM). The well-established framework of standard three-flavor neutrino oscillation sets us to search for new physics beyond SM. The heavier neutrino states can decay into lighter ones, first proposed to explain the zenith angle dependence observed in the first data of atmospheric neutrinos in Super-Kamiokande. The invisible decay of the Dirac neutrinos can produce a sterile neutrino state. In our work, we explore how the presence of decay of the third neutrino mass eigenstate will affect the degeneracies of octant-mass-hierarchy- \(\delta _{CP}\) in two proposed experiments: a Liquid Argon setup similar to the Deep Underground Neutrino Experiment (DUNE) and a water Cherenkov setup like Portvino to ORCA (P2O), with baselines of 1300 km and 2588 km (bi-magic baseline), respectively.

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Degeneracies in Presence of Invisible Decay of Neutrinos

  • 会议论文

  • 发表日期：

    2025年

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  • Supriya Pan

摘要

The observed signature of neutrino oscillation indicates the presence of massive neutrinos in the Standard Model (SM). The well-established framework of standard three-flavor neutrino oscillation sets us to search for new physics beyond SM. The heavier neutrino states can decay into lighter ones, first proposed to explain the zenith angle dependence observed in the first data of atmospheric neutrinos in Super-Kamiokande. The invisible decay of the Dirac neutrinos can produce a sterile neutrino state. In our work, we explore how the presence of decay of the third neutrino mass eigenstate will affect the degeneracies of octant-mass-hierarchy- \(\delta _{CP}\) in two proposed experiments: a Liquid Argon setup similar to the Deep Underground Neutrino Experiment (DUNE) and a water Cherenkov setup like Portvino to ORCA (P2O), with baselines of 1300 km and 2588 km (bi-magic baseline), respectively.