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arXiv 1301.4339hep-exastro-ph.HE
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IceCube中的大气中微子振荡

Atmospheric Neutrino Oscillations in IceCube

Andreas Groß

摘要:

我们介绍了对IceCube/DeepCore在2010-2011年收集的数据进行分析的结果,这些数据导致在高能中微子望远镜中首次显著检测到中微子振荡。从DeepCore收集的数据中提取了包含振荡信号的低能μ子中微子样本(20-100 GeV)。从IceCube数据中提取了一个高能μ中微子样本(100 GeV-10 TeV),以抑制系统的不确定性。当大于$5σ$时,非振荡假设被拒绝。我们将振荡参数$Δm^2_{23}$和$\sin^22 θ_{23}$拟合到这些数据样本。在一个2-味形式主义,我们发现$Δm^2_{23}= (2.5\pm0.6)\cdot10^{-3}$ eV $^2$和$\sin^22 θ_{23}>0.92$,而最大的混合是有利的。这些结果与世界平均值相当一致。

英文摘要:

We present the results of an analysis of data collected by IceCube/DeepCore in 2010-2011 resulting in the first significant detection of neutrino oscillations in a high-energy neutrino telescope. A low-energy muon neutrino sample (20-100 GeV) containing the oscillation signal was extracted from data collected by DeepCore. A high-energy muon neutrino sample (100 GeV -10 TeV) was extracted from IceCube data in order to constrain the systematic uncertainties. The non-oscillation hypothesis was rejected with more than $5σ$. We fitted the oscillation parameters $Δm^2_{23}$ and $\sin^22 θ_{23}$ to these data samples. In a 2-flavor formalism we find $Δm^2_{23}= (2.5\pm0.6)\cdot10^{-3}$ eV$^2$ and $\sin^22 θ_{23}>0.92$ while maximum mixing is favored. These results are in good agreement with the world average values.

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。

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