The large distances travelled by neutrinos emitted from the Sun and core-collapse supernovae together with the characteristic energy of such neutrinos provide ideal conditions to probe their lifetime, when the decay products evade detection. We investigate the prospects of probing invisible neutrino decay capitalising on the detection of solar and supernova neutrinos as well as the diffuse supernova neutrino background (DSNB) in the next-generation neutrino observatories Hyper-Kamiokande, DUNE, JUNO, DARWIN, and RES-NOVA. We find that future solar neutrino data will be sensitive to values of the lifetime-to-mass ratio τ ₁/m ₁ and τ ₂/m ₂ of 𝒪(10^-1–10^-2) s/eV. From a core-collapse supernova explosion at 10 kpc, lifetime-to-mass ratios of the three mass eigenstates of 𝒪(10⁵) s/eV could be tested. After 20 years of data taking, the DSNB would extend the sensitivity reach of τ ₁/m ₁ to 10⁸ s/eV. These results promise an improvement of about 6–15 orders of magnitude on the values of the decay parameters with respect to existing limits.

中文翻译：

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太阳和核心塌缩超新星是中微子寿命的主要探测器

当衰变产物逃避检测时，太阳和核心塌缩超新星发射的中微子行进的距离很长，加上这些中微子的特征能量，为探测它们的寿命提供了理想的条件。我们研究了利用下一代中微子观测站 Hyper-Kamiokande、DUNE、JUNO、DARWIN 和 RES-NOVA 中对太阳和超新星中微子以及扩散超新星中微子背景 (DSNB) 的探测来探测不可见中微子衰变的前景。我们发现未来的太阳中微子数据将对寿命质量比的值敏感τ ₁ /米 ₁和τ ₂ /米 ₂的 𝒪(10 ^-1 –10 ^-2 ) s/eV。从 10 kpc 的核心塌缩超新星爆炸中，可以测试𝒪(10 ⁵ ) s/eV的三个质量本征态的寿命质量比。经过 20 年的数据采集，DSNB 将扩大敏感度范围τ ₁ /米 ₁至 10 ⁸ s/eV。这些结果有望使衰减参数值相对于现有限制提高约 6-15 个数量级。