Search for matter-dependent atmospheric neutrino oscillations in Super-Kamiokande
Search for matter-dependent atmospheric neutrino oscillations in Super-Kamiokande
复制标题
DOI：
10.1103/physrevd.77.052001
复制
发表时间：
2008-01
影响因子：
5
通讯作者：
The Super-Kamiokande Collaboration;K. Abe;E. al.
中科院分区：
文献类型：
--
作者：
The Super-Kamiokande Collaboration;K. Abe;E. al.
我们在质量变化中微子（MaVaN）模型的背景下考虑{nu}{sub {mu}}{yields}{nu}{sub {tau}}振荡，其中中微子质量可以根据沿着中微子飞行路径的电子密度而变化。我们的分析假设了一种机制，它只依赖于中微子所穿过的介质的电子密度，即普通物质密度。完全包含，部分包含和向上的μ介子大气中微子数据从超级神冈探测器，从整个SK-I期间的1489个活的日子，进行了比较，MaVaN模型的预测。我们发现，对于2味振荡的情况下，并为特定的模型测试，振荡独立于电子密度是有利于密度依赖。假设最大混合，最佳拟合的情况下，密度无关的情况下没有显着不同。
We consider {nu}{sub {mu}}{yields}{nu}{sub {tau}} oscillations in the context of the mass varying neutrino (MaVaN) model, where the neutrino mass can vary depending on the electron density along the flight path of the neutrino. Our analysis assumes a mechanism with dependence only upon the electron density, hence ordinary matter density, of the medium through which the neutrino travels. Fully-contained, partially-contained and upward-going muon atmospheric neutrino data from the Super-Kamiokande detector, taken from the entire SK-I period of 1489 live days, are compared to MaVaN model predictions. We find that, for the case of 2-flavor oscillations, and for the specific models tested, oscillation independent of electron density is favored over density dependence. Assuming maximal mixing, the best-fit case and the density-independent case do not differ significantly.