Abstract We present a dark sector model that reproduces the KOTO, MiniBooNE and muon anomalous magnetic moment anomalies. The dark sector is comprised of a light scalar singlet S that has a large coupling to a slightly heavier sterile neutrino that mixes with the active neutrinos. The scalar couples to standard model fermions via Yukawa couplings, and to photons via a higher-dimensional coupling. The KOTO signal is a result of the flavor-changing penguin process K L → π 0 S followed by the decay of S to neutrinos. The sterile neutrino produced in neutrino-nucleus scattering at MiniBooNE decays to an active neutrino and S, which decays electromagnetically and creates an event excess at low energies.

中文翻译：

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KOTO 和 MiniBooNE 异常的暗区起源

摘要 我们提出了一个暗扇区模型，可以再现 KOTO、MiniBooNE 和 μ 子异常磁矩异常。暗区由一个轻标量单线态 S 组成，它与稍重的无菌中微子有很大的耦合，后者与活性中微子混合。标量通过汤川耦合与标准模型费米子耦合，并通过高维耦合与光子耦合。KOTO 信号是企鹅变味过程 KL → π 0 S 随后 S 衰变成中微子的结果。在 MiniBooNE 的中微子核散射中产生的惰性中微子衰变成活性中微子和 S，后者以电磁方式衰变并在低能量下产生事件过剩。