论文标题
Dans实验的新结果
New results from the DANSS experiment
论文作者
论文摘要
我们介绍了基于从检测器中心到反应堆核心中心收集的350万个反向β衰减（IBD）事件的350万个反向β衰减（IBD）事件的新初步结果。检测器位置通常每周更改3次。因此，许多系统的不确定性被取消。一项新的分析还采用了有关相对IBD计数速率的信息，除了正电子能量光谱形状的变化外。排除的区域涵盖了非常有趣的无菌中微子参数的非常有趣的范围。没有观察到无菌中微子的统计显着证据。在4美元的情况下，最佳拟合点的意义是1.5 $σ$
We present new preliminary DANSS results based on 3.5 million Inverse Beta Decay (IBD) events collected at 3 distances (10.9 m, 11.9 m, and 12.9 m) from the detector center to the reactor core center. The detector position is changed typically 3 times a week. Therefore many systematic uncertainties are canceled out. A new analysis that uses information about relative IBD counting rates in addition to changes in positron energy spectra shapes is employed. The excluded area covers a very interesting range of the sterile neutrino parameters up to $\sin^2 2θ_{ee} < 0.008$ in the most sensitive region. No statistically significant evidence for sterile neutrinos is observed. The significance of the best-fit point in the 4$ν$ case is 1.5$σ$
