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arXiv 2005.08920hep-phhep-ex
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KOTO和MiniBooNE异常的暗扇区起源

Dark sector origin of the KOTO and MiniBooNE anomalies

Alakabha Datta, Saeed Kamali, Danny Marfatia

摘要:

我们提出了一个暗扇区模型,再现KOTO,MiniBooNE和μ子异常磁矩异常。暗区是由一个轻标量单线态$S$组成,它与一个稍重的惰性中微子有很大的耦合,惰性中微子与活性中微子混合。标量通过汤川耦合与标准模型费米子耦合,通过高维耦合与光子耦合。KOTO信号是企鹅变味过程$K_L \to π^0 S$的结果,随后是$S$衰变为中微子。在MiniBooNE的中微子-核散射中产生的无菌中微子衰变为活性中微子和$S$,后者以电磁方式衰变并在低能量下产生事件过剩。

英文摘要:

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 $K_L \to π^0 S$ 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.

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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