arXiv 0812.46402008-12hep-phhep-ex

不同分析方法参数对大气中微子灵敏度的比较

A comparison of the sensitivities of the parameters with atmospheric neutrinos for different analysis methods

Abhijit Samanta

备注：: 17 pages, 9 figures, some clarifications added, typos corrected, version to be published in Phys. Rev. D
发表信息：: Phys.Rev.D79:053011,2009
DOI：: 10.1103/PhysRevD.79.053011

摘要：

在大气中微子实验中，主要的问题是通量的巨大不确定性、通量随能量增加而迅速下降、真中微子和重构中微子之间的能量和天顶角分辨率依赖于能量。这些都在一起使选择的数据合并卡方分析复杂。大型铁量能器具有高分辨率测量μ子能量和方向的能力。根据轨道在磁场中的弯曲，它还可以区分其电荷。利用Nuance软件分析了大气中微子振荡产生事件，并将电荷流相互作用中产生的μ子作为重构中微子。这实际上考虑到了广泛决议的主要问题。我们以三种方式对数据进行了分箱：i）在$\log E -\log L$平面的网格中，ii）在$\log E -\cosθ_{\rm zenith}$平面的网格中，iii）在$\log (L/E)$的分箱中。我们分别对中微子和反中微子的$Δm_{32}^2, ~θ_{13}$和$θ_{23}$方法进行了边缘化的$χ^2$研究，最后比较了结果。

英文摘要：

In the atmospheric neutrino experiments the primary problems are the huge uncertainties of flux, very rapid fall of flux with increase of energy, the energy dependent wide resolutions of energy and zenith angle between true neutrinos and reconstructed neutrinos. These all in together make the choice of binning of the data for chi-square analysis complicated. The large iron calorimeter has the ability to measure the energy and the direction of the muon with high resolution. From the bending of the track in the magnetic field it can also distinguish its charge. We have analyzed the atmospheric neutrino oscillation generating events by Nuance and then considering the muons produced in the charge current interactions as the reconstructed neutrinos. This practically takes into account the major problem of wide resolutions. We have binned the data in three ways: i) in the grids of $\log E -\log L$ plane, ii) in the grids of $\log E -\cosθ_{\rm zenith}$ plane, and iii) in the bins of $\log (L/E)$. We have performed a marginalized $χ^2$ study over $Δm_{32}^2, ~θ_{13}$ and $θ_{23}$ for neutrinos and anti-neutrinos separately for each method and finally compared the results.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

摘要：

英文摘要：

相关论文