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arXiv 1909.09561hep-ph
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用质量在250 MeV范围内的衰变无菌中微子解释MiniBooNE过剩

Explaining the MiniBooNE excess by a decaying sterile neutrino with mass in the 250 MeV range

Oliver Fischer, Alvaro Hernandez-Cabezudo, Thomas Schwetz

摘要:

MiniBooNE合作报告了过量的$460.5\pm 95.8$电子样事件($4.8σ$)。我们提出了一个解释,这些事件的不育中微子衰变成光子和轻中微子。无菌中微子的质量约为250 MeV,它是通过与范围为$10^{-11} \lesssim |U_{\ell 4}|^2 \lesssim 10^{-7}$($\ell = e,μ$)的μ子或电子混合,由质子束靶中的K介子衰变产生的。该模型可以通过考虑MiniBooNE中事件的时间分布来测试,并通过在运行或即将进行的中微子实验中寻找单光子事件,特别是通过费米实验室短基线中微子计划中的液氩探测器套件。

英文摘要:

The MiniBooNE collaboration has reported an excess of $460.5\pm 95.8$ electron-like events ($4.8σ$). We propose an explanation of these events in terms of a sterile neutrino decaying into a photon and a light neutrino. The sterile neutrino has a mass around 250 MeV and it is produced from kaon decays in the proton beam target via mixing with the muon or the electron in the range $10^{-11} \lesssim |U_{\ell 4}|^2 \lesssim 10^{-7}$ ($\ell = e,μ$). The model can be tested by considering the time distribution of the events in MiniBooNE and by looking for single-photon events in running or upcoming neutrino experiments, in particular by the suite of liquid argon detectors in the short-baseline neutrino program at Fermilab.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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