Probing Direct and Indirect Unitarity Violation in Future Accelerator Neutrino Facilities

Probing Direct and Indirect Unitarity Violation in Future Accelerator Neutrino Facilities
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探索未来加速器中微子设施中的直接和间接违反统一性

DOI:
10.1016/j.physletb.2017.09.055
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发表时间:
2017-08
期刊:
影响因子:
4.4
通讯作者:
Yu-Feng Li
Yu-Feng Li
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Jian Tang;Yibing Zhang;Yu-Feng Li

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轻、重无菌中微子的存在可能分别导致3× 3轻子混合矩阵的直接和间接么正性破坏。在目前的工作中,我们研究了未来的加速器中微子设施在探测幺正性破坏效应的潜力。以DUNE、T2HK和低能中微子工厂(LENF)为例,研究了直接和间接么正性破缺对轻子CP破缺发现范围和θ 23精确测量的影响。此外,还讨论了直接和间接么正性破坏的附加混合参数的约束条件。最后,我们强调,结合不同振荡通道、不同中微子束和不同探测器技术的实验,将是解决参数简并问题的有效途径,并给出轻子CP破坏的稳健测量,即使考虑了直接和间接的么正性破坏。
The possible existence of light and heavy sterile neutrinos may give rise to direct and indirect unitarity violation of the 3× 3 lepton mixing matrix respectively. In the current work we study the potential of future accelerator neutrino facilities in probing the unitarity violation effects. Taking DUNE, T2HK and a low-energy Neutrino Factory (LENF) as working examples of future accelerator neutrino facilities, we study the distinct effects of direct and indirect unitarity violation on the discovery reach of the leptonic CP violation and precision measurements of θ 23 in the three neutrino framework. In addition, constraints on the additional mixing parameters of direct and indirect unitarity violation are also discussed. Finally, we stress that the combination of experiments with different oscillation channels, different neutrino beams and different detector techniques will be an effective solution to the parameter degeneracy problem and give the robust measurement of leptonic CP violation even if the direct and indirect unitarity violation are taken into account.
利用大亚湾实验的完整配置改进对轻惰性中微子的搜索
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