One of the main neutrino oscillation parameters whose value has not been determined very precisely is the leptonic δ CP phase. Since neutrinos have a tiny but finite mass they can undergo decay both visibly and invisibly. The effect of invisible decay of the third mass eigen state ν 3 on the sensitivity to δ CP is analysed here using atmospheric neutrino and anti-neutrino events. Effects of detector resolutions and systematic uncertainties are studied to identify the optimum resolutions and efficiencies required by a detector to obtain a significant sensitivity even in the presence of decay.

中文翻译：

---

使用大气中微子探测存在v 3的无形衰变时对轻子δCP的敏感性

尚未精确确定其值的主要中微子振荡参数之一是轻子δCP相。由于中微子的质量很小但有限，因此它们可以在可见和不可见的情况下经历衰变。使用大气中微子和反中微子事件，分析了第三质量本征态ν3的无形衰减对δCP的敏感性。研究了探测器分辨率和系统不确定性的影响，以确定即使在存在衰减的情况下探测器也需要获得最佳灵敏度的最佳分辨率和效率。