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arXiv 1107.3405astro-ph.HEhep-ex
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用ARGO-YBJ实验观测Cosmic Ray月球阴影效应

Observation of the Cosmic Ray Moon shadowing effect with the ARGO-YBJ experiment

G. Di Sciascio, R. Iuppa

摘要:

宇宙射线受到月球的阻碍,预计其方向会出现亏损(所谓的\emph{Moon shadow})。月影是判断空气簇射阵性能的重要工具。事实上,由于地磁场对宇宙射线传播的弯曲效应,阴影中心的位移允许设置由探测器观察到的诱发簇射的初级粒子的能量标度。阴影的形状允许确定检测器点扩散函数。在高能量的赤字的位置允许评估其指向精度。本文介绍了在羊八井宇宙线实验室(ARGO-YBJ)上进行的宇宙线月球遮蔽效应的观测结果。中国,海拔4300米,606 g/cm $^2$),具有高统计学显著性(70个标准差)。本文用精确的蒙特卡罗模拟方法研究了地月系统中宇宙射线传播的地磁场和探测器点扩散函数对观测阴影的作用。

英文摘要:

Cosmic rays are hampered by the Moon and a deficit in its direction is expected (the so-called \emph{Moon shadow}). The Moon shadow is an important tool to determine the performance of an air shower array. In fact, the displacement of the shadow center, due to the bending effect of the Geomagnetic field on the propagation of cosmic rays, allows to set the energy scale of the primary particles inducing the showers observed by the detector. The shape of the shadow permits to determine the detector point spread function. The position of the deficit at high energy allows evaluating its pointing accuracy. Here we present the observation of the cosmic ray Moon shadowing effect carried out by the ARGO-YBJ experiment (Yangbajing Cosmic Ray Laboratory, Tibet, P.R. China, 4300 m a.s.l., 606 g/cm$^2$) in the multi-TeV energy region with high statistical significance (70 standard deviations). By means of an accurate Monte Carlo simulation of the cosmic rays propagation in the Earth-Moon system we have studied the role of the Geomagnetic field and of the detector point spread function on the observed shadow.

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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