Observation of muon intensity variations by season with the MINOS near detector
Observation of muon intensity variations by season with the MINOS near detector
复制标题
使用 MINOS 近探测器观测 μ 子强度随季节的变化
DOI：
10.1103/physrevd.90.012010
复制
发表时间：
2014
影响因子：
5
通讯作者：
Adamson P
中科院分区：
文献类型：
--
作者：
Adamson P
高层大气的温度影响着初级宇宙射线相互作用的高度和高能宇宙射线介子的产生，而高能宇宙射线介子可以在地下深处探测到。位于明尼苏达州苏丹的MINOS远端探测器收集了宇宙射线诱导的介子。在5年期间测量的地下介子率显示出4%的峰对峰季节性变化，这与高层大气的温度高度相关。发现介子速率变化与大气温度变化的关系系数为。由于质量和寿命的不同，介子和介子对宇宙射线在大气中的初级强子相互作用的贡献不同。这使得测量值可以被解释为测量的比率，与对撞机实验的期望一致。
The temperature of the upper atmosphere affects the height of primary cosmic ray interactions and the production of high-energy cosmic ray muons which can be detected deep underground. The MINOS far detector at Soudan, MN, has collected overcosmic ray induced muons. The underground muon rate measured over a period of five years exhibits a 4% peak-to-peak seasonal variation which is highly correlated with the temperature in the upper atmosphere. The coefficient,, relating changes in the muon rate to changes in atmospheric temperature was found to be. Pions and kaons in the primary hadronic interactions of cosmic rays in the atmosphere contribute differently todue to the different masses and lifetimes. This allows the measured value ofto be interpreted as a measurement of theratio forof, consistent with the expectation from collider experiments.