Abstract

The DANSS detector, i.e., a scintillation detector with a sensitive volume of 1 m³, is installed at the Kalinin Nuclear Power Plant under the reactor on a moving stage. The distance from the detector center to the reactor core center can be varied from 10.9 to 12.9 m. The detector records about 5000 events of inverse beta decay per day with a background level from cosmic muons of the order of two percent. An analysis on the search for the sterile neutrino, based on only the ratio of spectra shapes at various distances is compared with an analysis which, along with the shape, accounts for changes in relative count rates. The effect of systematic errors contributing to the analysis using relative count rates is discussed. The analysis considering three detector positions is described.

中文翻译：

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DANSS实验中的统计数据分析，包括反中微子相对计数率数据作为距离的函数

摘要

DANSS检测器，即灵敏体积为1 m ³的闪烁检测器，在移动台上的反应堆下方安装在加里宁核电站。从探测器中心到反应堆堆芯中心的距离可以在10.9至12.9 m之间变化。该探测器每天记录大约5000次反向beta衰减事件，其背景水平为宇宙μ子的2％左右。仅基于不同距离处的光谱形状比率，对搜索无菌中微子的分析与分析一起进行分析，该分析与形状一起考虑了相对计数率的变化。讨论了系统误差对使用相对计数率进行分析的影响。描述了考虑三个检测器位置的分析。