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arXiv 1012.3391hep-ex
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用MINOS近探测器测量地下大气μ介子电荷比

Measurement of the underground atmospheric muon charge ratio using the MINOS Near Detector

MINOS Collaboration

摘要:

磁化MINOS近探测器位于225米水当量(mwe)的深度,用于测量大气μ子电荷比。利用301天的数据,测得的大气μ介子正负率之比为1.266+/-0.001(统计)+ 0.015/-0.014(系统)。这一测量结果与其他浅层地下探测器的先前结果一致,为0.108+/-0.019(统计)。+ 系统)低于功能相同的MINOS远探测器在2070 mwe深度处的测量值。这种电荷比的增加作为深度的函数是一致的,增加μ子表面能产生的K介子衰变的μ子的分数增加。

英文摘要:

The magnetized MINOS Near Detector, at a depth of 225 meters of water equivalent (mwe), is used to measure the atmospheric muon charge ratio. The ratio of observed positive to negative atmospheric muon rates, using 301 days of data, is measured to be 1.266+/-0.001(stat.)+0.015/-0.014(syst.). This measurement is consistent with previous results from other shallow underground detectors, and is 0.108+/-0.019(stat. + syst.) lower than the measurement at the functionally identical MINOS Far Detector at a depth of 2070 mwe. This increase in charge ratio as a function of depth is consistent with an increase in the fraction of muons arising from kaon decay for increasing muon surface energies.

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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