论文标题
Nova和T2K的非常轻的无菌中微子
Very Light Sterile Neutrinos at NOvA and T2K
论文作者
论文摘要
在过去的几年中，由于在T2K和NOVA实验中对Muon-Neutrino消失的长期测量和Muon-to-Electron-Neutrino出现，我们对中微子振荡的理解已经显着发展。但是，当在标准三质量中的范式下解释时，两个实验的数据之间会出现张力。在这里，我们检查了在图片中添加非常轻的中微子时是否可以缓解这种张力。具体而言，我们专注于这种新中微子的质量与迄今已确定的三个主要活性中微子相似甚至更轻的情况。我们发现，对于某些参数空间的区域，四个中性框架比中等（略低于两个Sigma）显着性的三中性框架受到青睐。解释这些结果，我们为这四个中世纪框架的确为真实，为近期和长期实验提供未来的前景。
Over the last several years, our understanding of neutrino oscillations has developed significantly due to the long-baseline measurements of muon-neutrino disappearance and muon-to-electron-neutrino appearance at the T2K and NOvA experiments. However, when interpreted under the standard-three-massive-neutrinos paradigm, a tension has emerged between the two experiments' data. Here, we examine whether this tension can be alleviated when a fourth, very light neutrino is added to the picture. Specifically, we focus on the scenario in which this new neutrino has a mass similar to, or even lighter than, the three mostly-active neutrinos that have been identified to date. We find that, for some regions of parameter space, the four-neutrino framework is favored over the three-neutrino one with moderate (a little under two sigma) significance. Interpreting these results, we provide future outlook for near-term and long-term experiments if this four-neutrino framework is indeed true.
