arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2012.10255hep-ex
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DANSS实验的新结果

New results from the DANSS experiment

Mikhail Danilov

摘要:

我们提出了新的初步DANSS结果的基础上收集的350万反β衰变(IBD)事件在3个距离(10.9米,11.9米,12.9米)从探测器中心到反应堆堆芯中心。探测器位置通常每周更换3次。因此,许多系统的不确定性被抵消。一个新的分析,使用的信息相对IBD计数率除了正电子能谱形状的变化。排除的区域涵盖了一个非常有趣的范围内的不育中微子参数高达$\sin^2 2θ_{ee} < 0.008$在最敏感的区域。没有观察到无菌中微子的统计学显著证据。4个$ν$病例中最佳拟合点的显著性为1.5 $σ$

英文摘要:

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$σ$

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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