论文标题
使用Reno和NEOS数据搜索无菌中微子振荡
Search for sterile neutrino oscillation using RENO and NEOS data
论文作者
论文摘要
我们使用2 \，509 \，Reno的天数近探测器数据和180天的NEOS数据，对无菌中微子振荡进行独立搜索。由于两个探测器都位于汉比核电站的相同反应堆复合物，因此相关的系统不确定性被显着抑制。搜索是由六个反应堆和两个基线的294 \，m \，（Reno）和24 \，M \，（NEOS）之间的六个反应器和两个探测器之间消失的搜索。 NEOS及时能量光谱与RENO测量的无振荡预测的光谱比较可以探索反应堆$ \overlineν_e$振荡到无菌中微子。根据比较，我们获得了95 \％C.L.排除$ 0.1 <|δm_{41}^2 | <7 $ \，EV $^2 $的区域。我们还获得了68 \％C.L.允许的区域最适合$ |δm_{41}^2 | = 2.41 \，\ pm \，0.03 \，$ \，$ \，ev $^2 $和$ \ sin^22θ_{14} $ = 0.08 $ = 0.08 $ \，\ pm \，\ pm \，$ 0.03，$ 0.03，$ 0.03，p-value of 8.2 \％。在Reno，Neos和Daya Bay之间进行了反应器源的反应堆抗神经光谱的比较，以找到可能的光谱变化。
We present a reactor model independent search for sterile neutrino oscillation using 2\,509\,days of RENO near detector data and 180 days of NEOS data. The reactor related systematic uncertainties are significantly suppressed as both detectors are located at the same reactor complex of Hanbit Nuclear Power Plant. The search is performed by electron antineutrino\,($\overlineν_e$) disappearance between six reactors and two detectors with baselines of 294\,m\,(RENO) and 24\,m\,(NEOS). A spectral comparison of the NEOS prompt-energy spectrum with a no-oscillation prediction from the RENO measurement can explore reactor $\overlineν_e$ oscillations to sterile neutrino. Based on the comparison, we obtain a 95\% C.L. excluded region of $0.1<|Δm_{41}^2|<7$\,eV$^2$. We also obtain a 68\% C.L. allowed region with the best fit of $|Δm_{41}^2|=2.41\,\pm\,0.03\,$\,eV$^2$ and $\sin^2 2θ_{14}$=0.08$\,\pm\,$0.03 with a p-value of 8.2\%. Comparisons of obtained reactor antineutrino spectra at reactor sources are made among RENO, NEOS, and Daya Bay to find a possible spectral variation.
