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arXiv 2005.09168hep-phastro-ph.GAastro-ph.HE
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用多探测器核塌缩超新星约束无菌中微子

Constraining sterile neutrinos by core-collapse supernovae with multiple detectors

Jian Tang, TseChun Wang, Meng-Ru Wu

摘要:

eV尺度的无菌中微子被用来解释实验中的一些反常结果,\textit{such as}是指LSND中反应堆中微子通量的不足和$\barν_μ\to\barν_e$的过剩。这一假设可以通过未来的核心坍缩超新星中微子探测独立地进行测试,因为活性-无菌混合方案会影响超新星内部中微子的味道转换。在这项工作中,我们计算预测的超新星中微子事件在未来的探测器- DUNE,超K,和朱诺-在中子化爆发阶段发射的中微子时,亮度的$ν_e$占主导地位的其他口味。我们发现,对于一个超新星发生在10千秒差距内,在事件数的差异与无菌中微子允许排除无菌中微子假设在超过$99\%$的置信水平鲁棒。在$\sin^22θ_{14}$ - $Δm_{41}^2$平面上,导出的无菌中微子混合参数的约束条件比宇宙学和正在进行或计划中的反应堆实验的结果好两个数量级以上.

英文摘要:

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.

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