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Constraining active-sterile neutrino transition magnetic moments at DUNE near and far detectors
Journal of High Energy Physics ( IF 5.4 ) Pub Date : 2021-07-26 , DOI: 10.1007/jhep07(2021)200
Thomas Schwetz 1 , Albert Zhou 1 , Jing-Yu Zhu 1, 2
Affiliation  

We consider the sensitivity of the DUNE experiment to a heavy neutral lepton, HNL (also known as sterile neutrino) in the mass range from a few MeV to a few GeV, interacting with the Standard Model via a transition magnetic moment to the active neutrinos, the so-called dipole portal. The HNL is produced via the up-scattering of active neutrinos, and the subsequent decay inside the detector provides a single-photon signal. We show that the tau-neutrino dipole portal can be efficiently probed at the DUNE far detector, using the tau-neutrino flux generated by neutrino oscillations, while the near detector provides better sensitivity to the electron- and muon-neutrino dipole portal. DUNE will be able to explore large regions of currently unconstrained parameter space and has comparable sensitivity to other planned dedicated experiments, such as SHiP. We also comment briefly on the sensitivity to pure HNL mixing with the tau neutrino at the DUNE far detector.

A preprint version of the article is available at ArXiv.


中文翻译:

在 DUNE 近探测器和远探测器约束主动-无菌中微子跃迁磁矩

我们考虑了 DUNE 实验对质量范围从几 MeV 到几 GeV 的重中性轻子 HNL(也称为无菌中微子)的敏感性,通过过渡磁矩与活动中微子相互作用,与标准模型相互作用,所谓的偶极门户。HNL 是通过活性中微子的向上散射产生的,随后探测器内部的衰变提供了单光子信号。我们表明,使用中微子振荡产生的 tau-中微子通量,可以在 DUNE 远探测器有效探测 tau-中微子偶极子入口,而近探测器对电子和 μ 中微子偶极子入口提供更好的灵敏度。DUNE 将能够探索当前不受约束的参数空间的大区域,并且具有与其他计划的专用实验(例如 SHiP)相当的灵敏度。

该文章的预印版可在 ArXiv 上获得。
更新日期:2021-07-28
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