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arXiv 2107.12913astro-ph.HE
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大气μ子的季节变化

Seasonal Variation of Atmospheric Muons

Thomas Gaisser, Stef Verpoest

摘要:

带电π介子和K介子衰变和再相互作用之间的竞争依赖于高层大气的温度/密度分布。变化的幅度和相位取决于到达探测器所需的最小μ子能量和探测器中的μ子多重性。在这里,我们比较了不同的方法来表征μ子的生产配置文件和相应的有效温度。一个μ子生产配置文件的基础上的参数化的模拟μ子作为一次能源的函数进行比较与近似的解析解的级联方程集成在一次能源。在这两种情况下,我们比较了有效温度的两种定义。我们强调紧凑的地下探测器,如MINOS和OPERA的应用,同时指出它们如何与扩展探测器,如冰立方。

英文摘要:

Competition between decay and re-interaction of charged pions and kaons depends on the temperature/density profile of the upper atmosphere. The amplitude and phase of the variations depend on the minimum muon energy required to reach the detector and on muon multiplicity in the detector. Here we compare different methods for characterizing the muon production profile and the corresponding effective temperature. A muon production profile based on a parameterization of simulations of muons as a function of primary energy is compared with approximate analytic solutions of the cascade equation integrated over primary energy. In both cases, we compare two definitions of effective temperature. We emphasize applications to compact underground detectors like MINOS and OPERA, while indicating how they relate to extended detectors like IceCube.

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