论文标题
长基线加速器中微子实验的物质与真空振荡
Matter vs. vacuum oscillations at long baseline accelerator neutrino experiments
论文作者
论文摘要
长基线加速器中微子实验的中微子振荡概率预计将通过物质效应来改变。我们通过将数据拟合到（a）修改的振荡和（b）真空振荡的假设中，以搜索T2K和NO $ν$ A数据中这种修改的证据。我们发现，真空振荡与修改后的振荡一样，可以很好地适应数据。即使是t2k和no $ν$ a的延长运行，中微子模式$（5ν）$（5ν）$和5年的抗内核模式$（5 \barν）$，可以{\ bf not}在Vacuum和Matter Fiedified Oscillations之间具有$ 3〜σ $的区别。拟议的实验沙丘，中微子和抗神经诺里诺的运行为5年$（5ν+ 5 \barν）$，如果层次结构是正常的，则可以将真空振荡本身排除在$ 5〜σ $中。如果层次结构被倒置，则对真空振荡的$ 5〜σ $歧视需要$（5ν+ 5 \ 5 \barν）$运行T2K，\ nova和Dune的组合。
The neutrino oscillation probabilities at the long-baseline accelerator neutrino experiments are expected to be modified by matter effects. We search for evidence of such modification in the data of T2K and NO$ν$A, by fitting the data to the hypothesis of (a) matter modified oscillations and (b) vacuum oscillations. We find that vacuum oscillations provide as good a fit to the data as matter modified oscillations. Even extended runs of T2K and NO$ν$A, with 5 years in neutrino mode $(5 ν)$ and five years in anti-neutrino mode $(5 \barν)$, can {\bf not} make a $3~σ$ distinction between vacuum and matter modified oscillations. The proposed experiment DUNE, with neutrino and anti-neutrino runs of 5 years each $(5 ν+ 5 \barν)$, can rule out vacuum oscillations by itself at $5~σ$ if the hierarchy is normal. If the hierarchy is inverted, a $5~σ$ discrimination against vacuum oscillations requires the combination of $(5 ν+ 5 \barν)$ runs of T2K, \nova and DUNE.
