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arXiv 1402.6439hep-exhep-phphysics.ins-det
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大亚湾反应堆中微子实验的新结果

New Results from the Daya Bay Reactor Neutrino Experiment

Bei-Zhen Hu

摘要:

本文介绍了中微子混合参数$\sin^2 2θ_{13}$的精确测量结果,以及首次在大亚湾反应堆中微子实验中对反中微子质量平方差$\sin^2(Δ_{ee}) \equiv \cos^2 θ_{12} \sin^2 Δ_{31} + \sin^2 θ_{12} \sin^2 Δ_{32}$的直接测量。上述结果基于2011年12月24日至2012年7月28日期间六个探测器的数据采集。通过使用所观察到的反中微子速率和能谱分析,结果为$\sin^2 2θ_{13}=0.090^{+0.008}_{-0.009}$和$| Δm^2_{ee}| = 2.59^{+0.19}_{-0.20} \cdot 10^{-3} $ eV $^2$,其中$χ^2$ /NDF为162.7/153。$| Δm^2_{ee}| $的值与μ子中微子束实验中测得的$| Δm^2_{μμ}|$一致。

英文摘要:

This presentation describes a precision result of the neutrino mixing parameter, $\sin^2 2θ_{13}$, and the first direct measurement of the antineutrino mass-squared difference $\sin^2(Δ_{ee}) \equiv \cos^2 θ_{12} \sin^2 Δ_{31} + \sin^2 θ_{12} \sin^2 Δ_{32}$ from the Daya Bay Reactor Neutrino Experiment. The above results are based on the six detector data-taking from 24 December 2011 to 28 July 2012. By using the observed antineutrino rate and the energy spectrum analysis, the results are $\sin^2 2θ_{13}=0.090^{+0.008}_{-0.009}$ and $| Δm^2_{ee}| = 2.59^{+0.19}_{-0.20} \cdot 10^{-3} $eV$^2$ with a $χ^2$/NDF of 162.7/153. The value of $| Δm^2_{ee}| $ is consistent with $| Δm^2_{μμ}|$ measured in muon neutrino beam experiments.

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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