Improved Search for a Light Sterile Neutrino with the Full Configuration of the Daya Bay Experiment
Improved Search for a Light Sterile Neutrino with the Full Configuration of the Daya Bay Experiment
复制标题
利用大亚湾实验的完整配置改进对轻惰性中微子的搜索
DOI：
10.1103/physrevlett.117.151802
复制
发表时间：
2016
影响因子：
8.6
通讯作者：
Daya Bay Collaboration
中科院分区：
文献类型：
--
作者：
F. P. An et al.;Daya Bay Collaboration
本文报告了在大亚湾反应堆中微子实验的全配置条件下，对电子反中微子消失通道中的轻无菌中微子混合的改进研究。在八个反中微子探测器中收集了额外的404天数据，这次搜索受益于3.6倍于以前出版物的统计数据，以及能量校准和背景减少的改进。对三个实验霍尔斯中反应堆反中微子的速率和能谱进行了相对比较，没有发现物质范围内无菌中微子混合的证据。由此产生的限制是提高了约1/2比以前的结果的一个因素，并构成最严格的限制，迄今在region。
This Letter reports an improved search for light sterile neutrino mixing in the electron antineutrino disappearance channel with the full configuration of the Daya Bay Reactor Neutrino Experiment. With an additional 404 days of data collected in eight antineutrino detectors, this search benefits from 3.6 times the statistics available to the previous publication, as well as from improvements in energy calibration and background reduction. A relative comparison of the rate and energy spectrum of reactor antineutrinos in the three experimental halls yields no evidence of sterile neutrino mixing in themass range. The resulting limits onare improved by approx imately a factor of 2 over previous results and constitute the most stringent constraints to date in theregion.