论文标题
映射从道到朱诺的反应堆中微子光谱
Mapping reactor neutrino spectra from TAO to JUNO
论文作者
论文摘要
江门地下中微子天文台（JUNO）项目旨在同时探测三种味内中微子振荡的两个主要频率，以及与大规模订购（正常或倒置）相关的干扰，在中国的两个强大反应器中的距离约53 km，在Yangjiang和taishan。在后一种复合物中，计划从一个反应堆核心的弹性光谱受到Taishan antineutrino天文台（TAO）的密切监测，预计比Juno具有更好的分辨率（x 1/2）和更高的统计量（x 30）。在中微子能量光谱的背景下，来自总结计算中的精细结构特征，我们详细分析了能量分辨率和核子后坐力对可观察到的事件光谱的影响。我们表明，TAO中的模型频谱可以通过适当的卷积映射到Juno中的相应频谱中。在没有振荡的假设情况下，映射是精确的，并且在振荡中具有非常好的精度。然后，我们分析对Juno（及其精度振荡能力）的质量顺序的敏感性，假设单个参考光谱以及一系列变异光谱的束，这是通过在公开可用工具包中更改核输入不确定性来获得的。我们通过卡方分析表明，变异光谱几乎没有降低Juno中的灵敏度，尤其是在包括TAO约束时。还讨论了变体光谱的统计分析的细微方面。
The Jiangmen Underground Neutrino Observatory (JUNO) project aims at probing, at the same time, the two main frequencies of three-flavor neutrino oscillations, as well as their interference related to the mass ordering (normal or inverted), at a distance of ~53 km from two powerful reactor complexes in China, at Yangjiang and Taishan. In the latter complex, the unoscillated spectrum from one reactor core is planned to be closely monitored by the Taishan Antineutrino Observatory (TAO), expected to have better resolution (x 1/2) and higher statistics (x 30) than JUNO. In the context of neutrino energy spectra endowed with fine-structure features from summation calculations, we analyze in detail the effects of energy resolution and nucleon recoil on observable event spectra. We show that a model spectrum in TAO can be mapped into a corresponding spectrum in JUNO through appropriate convolutions. The mapping is exact in the hypothetical case without oscillations, and holds to a very good accuracy in the real case with oscillations. We then analyze the sensitivity to mass ordering of JUNO (and its precision oscillometry capabilities) assuming a single reference spectrum, as well as bundles of variant spectra, as obtained by changing nuclear input uncertainties in summation calculations from a publicly available toolkit. We show through a chi-squared analysis that variant spectra induce little reduction of the sensitivity in JUNO, especially when TAO constraints are included. Subtle aspects of the statistical analysis of variant spectra are also discussed.
