论文标题
天体物理中微子的风味，具有活性 - 菌株混合
Flavors of Astrophysical Neutrinos with Active-Sterile Mixing
论文作者
论文摘要
我们重新审视了在中微子望远镜上观察到的高能天体中微子的风味。假设中微子风味状态的统一时间演变，可观察到的味道成分与通过振荡平均风味过渡的初始组成有关。在先前的研究中，我们假设三种单一混合味的TEV-PEV天体中微子的风味成分得出了一般界限。我们将这些边界扩展到活动性 - 肌中微子混合的情况下。我们的边界是分析性的，仅基于混合的单位性，并且不需要对未知的活动 - 感应混合参数的值进行采样。这些边界适用于任何扩展的活动性中微子混合场景，其中能量依赖性的非标准风味在加速器，反应堆和大气中微子振荡中观察到的标准混合占主导地位。
We revisit the flavor composition of high-energy astrophysical neutrinos observed at neutrino telescopes. Assuming unitary time evolution of the neutrino flavor states, the flavor composition observable at Earth is related to the initial composition at their sources via oscillation-averaged flavor transitions. In a previous study we derived general bounds on the flavor composition of TeV-PeV astrophysical neutrinos assuming three-flavor unitary mixing. We extend these bounds to the case of active-sterile neutrino mixing. Our bounds are analytical, derived based only on the unitarity of the mixing, and do not require sampling over the values of the unknown active-sterile mixing parameters. These bounds apply to any extended active-sterile neutrino mixing scenario where energy-dependent nonstandard flavor mixing dominates over the standard mixing observed in accelerator, reactor, and atmospheric neutrino oscillations.
