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arXiv 1111.2718hep-ex
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MINOS近探测器上的大气μ子电荷比

The Atmospheric Muon Charge Ratio at the MINOS Near Detector

J. K. de Jong

摘要:

磁化的MINOS近场探测器可以准确地确定大气μ子的电荷符号,这为测量大气μ子电荷比提供了方便。为了减少与几何偏差和接受度相关的系统误差,我们结合了使用相反磁场极性获得的相等周期的数据。我们报告了平均E $_{μ,0}cos(θ)$ = \unit [63]{GeV}时$1.2666\pm0.0015(stat.)^{+0.0096}_{-0.0088}(syst.)$的电荷比。这一测量值与世界平均值\cite{Hebbeker} \cite{Haino} \cite{Achard}一致,但明显低于MINOS远探测器\cite{Adamson}的早期观测值。这种增加被证明是一致的假设所观察到的μ介子的更大的一部分来自宇宙射线簇射内的K介子衰变。

英文摘要:

The magnetized MINOS near detector can accurately determine the charge sign of atmospheric muons, this facilitates a measurement of the atmospheric muon charge ratio. To reduce the systematic error associated with geometric bias and acceptance we have combined equal periods of data obtained with opposite magnetic field polarities. We report a charge ratio of $1.2666\pm0.0015(stat.)^{+0.0096}_{-0.0088}(syst.)$ at a mean E$_{μ,0}cos(θ)$=\unit[63]{GeV}. This measurement is consistent with the world average\cite{Hebbeker}\cite{Haino}\cite{Achard} but significantly lower than the earlier observation at the MINOS far detector\cite{Adamson}. This increase is shown to be consistent with the hypothesis that a greater fraction of the observed muons arise from kaon decay within the cosmic ray shower.

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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