论文标题
在里诺（Reno）搜索子-EV无菌中微子
Search for Sub-eV Sterile Neutrino at RENO
论文作者
论文摘要
我们报告了在Reno实验中使用大约2200个活天数据的搜索结果，该搜索结果大约有2200个活天数。搜索是由电子抗毒剂（$ \overlineν_e$）消失进行的，发生在六个2.8 GW $ _ {\ text {th}} $反应器和两个位于294 m（近）和1383 m（远）的相同探测器，来自反应器阵列中心。近距离检测器之间的光谱比较可以探索反应堆$ \overlineν_e$振荡到轻型无菌中微子。发现观察到的光谱差异与三味振荡模型的光谱差异一致。在$ \ sin^{2}2θ_{14} $上，这会产生限制，$ 10^{ - 4} \ sillsim | lesesim |Δm_{41}^2 | \ Lessim 0.5 $ ev $^2 $区域，不含反应堆$ \overlineν_e$通量和光谱不确定性。 Reno结果在$ |Δm^2_ {41} |的无菌中微子混合中提供了最严格的限制。 \ Lessim 0.002 $ ev $^2 $使用$ \overlineν_e$消失频道。
We report a search result for a light sterile neutrino oscillation with roughly 2200 live days of data in the RENO experiment. The search is performed by electron antineutrino ($\overlineν_e$) disappearance taking place between six 2.8 GW$_{\text{th}}$ reactors and two identical detectors located at 294 m (near) and 1383 m (far) from the center of reactor array. A spectral comparison between near and far detectors can explore reactor $\overlineν_e$ oscillations to a light sterile neutrino. An observed spectral difference is found to be consistent with that of the three-flavor oscillation model. This yields limits on $\sin^{2} 2θ_{14}$ in the $10^{-4} \lesssim |Δm_{41}^2| \lesssim 0.5$ eV$^2$ region, free from reactor $\overlineν_e$ flux and spectrum uncertainties. The RENO result provides the most stringent limits on sterile neutrino mixing at $|Δm^2_{41}| \lesssim 0.002$ eV$^2$ using the $\overlineν_e$ disappearance channel.
