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arXiv 0810.3515hep-ex
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利用CMS数据测量宇宙μ子的电荷比

Measurement of the Charge Ratio of Cosmic Muons using CMS Data

M. Aldaya, P. Garcia-Abia

摘要:

我们已经进行了测量的宇宙射线μ介子电荷比,作为μ介子动量的函数,使用CMS实验收集的数据,利用μ介子桶漂移管(DT)室的能力。宇宙μ子电荷比被定义为正电荷μ子与负电荷μ子的数量之比。宇宙射线μ子是高能宇宙射线粒子(主要是质子和原子核)进入大气层上层与空气原子核相互作用的结果。由于这些碰撞有利于正介子的产生,因此电荷组成存在不对称性,预计会产生更多的正介子。在\textit{Magnet Test and Cosmic Challenge}(MTCC)采集数据样本。虽然MTCC本身是CMS探测器建设中的一个重要里程碑,但其主要目标中没有物理研究,它提供了第一次获得物理结果的机会,并在LHC启动之前使用CMS中的真实数据测试完整的分析链,以及对探测器性能的补充检查。

英文摘要:

We have performed the measurement of the cosmic ray muon charge ratio, as a function of the muon momentum, using data collected by the CMS experiment, exploiting the capabilities of the muon barrel drift tube (DT) chambers. The cosmic muon charge ratio is defined as the ratio of the number of positive- to negative-charge muons. Cosmic ray muons result from the interaction of high-energy cosmic-ray particles (mainly protons and nuclei), entering the upper layers of the atmosphere, with air nuclei. Since these collisions favour positive meson production, there is an asymmetry in the charge composition and more positive muons are expected. The data samples were collected at the \textit{Magnet Test and Cosmic Challenge} (MTCC). While the MTCC itself was a crucial milestone in the CMS detector construction, not having physics studies among its primary goals, it provided the first opportunity to obtain physics results and test the full analysis chain using real data in CMS before the LHC startup, together with a complementary check of the detector performance.

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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