用中微子-核相干散射分辨LMA暗NSI简并度
Resolving the LMA-dark NSI degeneracy with coherent neutrino-nucleus scattering
摘要：
在存在非标准中微子相互作用（NSI）的情况下，中微子振荡数据存在简并性，这涉及到混合角${θ_{12}}$的八分圆翻转和中微子质量排序的类型.在这篇文章中，我们根据最近的相干弹性中微子-核散射（CE $ν$ NS）的相干实验数据，重新审视这种简并的状态。对于上夸克和下夸克的一般相对耦合，最新的数据在$2σ$水平上不利于简并，但仍保持在较高的置信水平。我们研究了未来CE $ν$ NS测量的要求，以解决具有高显著性的简并性。我们发现，测量涉及电子和μ子中微子的味道和目标的中子质子比接近1是必需的。例如，在欧洲空间源的一个硅靶实验中，对于上夸克和下夸克的任意相对耦合，可以在超过$4σ$的条件下解决简并度。
英文摘要：
In the presence of non-standard neutrino interactions (NSI), a degeneracy exists in neutrino oscillation data, which involves the flipping of the octant of the mixing angle ${θ_{12}}$ and the type of the neutrino mass ordering. In this article, we revisit the status of this degeneracy in the light of recent data on coherent elastic neutrino-nucleus scattering (CE$ν$NS) from the COHERENT experiment. For general relative couplings to up and down quarks, the degeneracy is disfavoured at the $2σ$ level by the latest data but remains at a higher confidence level. We investigate the requirements of future CE$ν$NS measurements to resolve the degeneracy with high significance. We find that a measurement involving both, electron and muon neutrino flavours and a target with a neutron-to-proton ratio close to 1 is required. For example, an experiment with a silicon target at the European Spallation Source can resolve the degeneracy at more than $4σ$ for arbitrary relative couplings to up and down quarks.
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