论文标题
用多个探测器来限制无菌中微子的中微子
Constraining sterile neutrinos by core-collapse supernovae with multiple detectors
论文作者
论文摘要
已经提出了EV规模的无菌中微子来解释实验中的一些异常结果，\ textit {例如}反应堆中微子通量的不足和LSND中的$ \barν_μ\ to \barν_μ\ to \barν_e$。由于活跃的 - 微分混合方案会影响超新星内中微子的风味转化，因此可以独立地通过将来的核心偏离超新星中微子检测来检验该假设。在这项工作中，我们计算了未来探测器中预测的超新星中微子事件 - 沙丘，超级K和Juno-在中子爆发阶段发出的中微子，当时$ν_e$的亮度主导了其他口味。我们发现，对于发生在10 kpc以内的超新星，带有无菌中微子的事件数字的差异允许将无菌中微子假设排除在超过$ 99 \％$ $置信水平的稳健水平上。在$ \ sin^22θ_{14} $ - $δm_{41}^2 $平面中，对无菌中微子混合参数的派生约束比宇宙学和持续或拟议的反应堆实验的结果相当好。
The eV-scale sterile neutrino has been proposed to explain some anomalous results in experiments, \textit{such as} the deficit of reactor neutrino fluxes and the excess of $\barν_μ\to\barν_e$ in LSND. This hypothesis can be tested by future core-collapse supernova neutrino detection independently since the active-sterile mixing scheme affects the flavor conversion of neutrinos inside the supernova. In this work, we compute the predicted supernova neutrino events in future detectors -- DUNE, Hyper-K, and JUNO -- for neutrinos emitted during the neutronization burst phase when the luminosity of $ν_e$ dominates the other flavors. We find that for a supernova occurring within 10 kpc, the difference in the event numbers with and without sterile neutrinos allows to exclude the sterile neutrino hypothesis at more than $99\%$ confidence level robustly. The derived constraints on sterile neutrinos mixing parameters are comparably better than the results from cosmology and on-going or proposed reactor experiments by more than two orders of magnitude in the $\sin^22θ_{14}$-$Δm_{41}^2$ plane.
