Low exposure long-baseline neutrino oscillation sensitivity of the DUNE experiment
Low exposure long-baseline neutrino oscillation sensitivity of the DUNE experiment
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DUNE 实验的低曝光长基线中微子振荡灵敏度
DOI：
10.1103/physrevd.105.072006
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发表时间：
2022
影响因子：
5
通讯作者：
Aguilar, J.
中科院分区：
文献类型：
--
作者：
Abud, A. Abed;Abi, B.;Acciarri, R.;Acero, M. A.;Adames, M. R.;Adamov, G.;Adams, D.;Adinolfi, M.;Aduszkiewicz, A.;Aguilar, J.
深地下中微子实验（DUNE）将在实验的整个生命周期内产生世界领先的中微子振荡测量。在这项工作中，我们探索了DUNE在中微子扇区中观察电荷奇偶性破坏（CPV）的灵敏度，并解决了高达100千兆兆瓦日历年（kd - mw - cy）的质量排序问题，其中日历年包括基于费米实验室过去加速器性能的57%加速器正常运行时间的假设。分析包括通量预测、中微子相互作用模型和探测器效应的详细不确定性。我们证明，DUNE将能够在66 (100)kt-MW-CY远探测器暴露下明确地解决（）级的中微子质量顺序，并且能够在明显更短的暴露下做出强有力的陈述，这取决于其他振荡参数的真实值，仅在24 kt-MW-CY后几乎所有真值的中位灵敏度为。我们还表明，DUNE有潜力在100 kt-MW-CY暴露水平上对CPV进行强大的测量，以获得最大的cp违反值。此外，还讨论了DUNE的灵敏度与在中微子增强和反中微子增强运行中所受照射的关系。当考虑到整个感兴趣的空间时，发现在每个光束模式下采取的相等比例的曝光接近最佳。
The Deep Underground Neutrino Experiment (DUNE) will produce world-leading neutrino oscillation measurements over the lifetime of the experiment. In this work, we explore DUNE’s sensitivity to observe charge-parity violation (CPV) in the neutrino sector, and to resolve the mass ordering, for exposures of up to 100 kiloton-megawatt-calendar years (kt-MW-CY), where calendar years include an assumption of 57% accelerator uptime based on past accelerator performance at Fermilab. The analysis includes detailed uncertainties on the flux prediction, the neutrino interaction model, and detector effects. We demonstrate that DUNE will be able to unambiguously resolve the neutrino mass ordering at a() level with a 66 (100) kt-MW-CY far detector exposure, and has the ability to make strong statements at significantly shorter exposures depending on the true value of other oscillation parameters, with a median sensitivity offor almost all truevalues after only 24 kt-MW-CY. We also show that DUNE has the potential to make a robust measurement of CPV at alevel with a 100 kt-MW-CY exposure for the maximally CP-violating values. Additionally, the dependence of DUNE’s sensitivity on the exposure taken in neutrino-enhanced and antineutrino-enhanced running is discussed. An equal fraction of exposure taken in each beam mode is found to be close to optimal when considered over the entire space of interest.