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arXiv 2107.09347hep-exphysics.ins-det
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大气μ介子率测量与蒙特卡罗模拟的比较及KM3NeT探测瞬发大气μ介子的灵敏度研究

Comparison of the measured atmospheric muon rate with Monte Carlo simulations and sensitivity study for detection of prompt atmospheric muons with KM3NeT

Piotr Kalaczyński

摘要:

KM3NeT合作组织在意大利和法国的两个地点成功地在地中海部署了下一代海底中微子望远镜的第一批探测装置。2016年12月至2020年1月期间收集的数据样本已用于测量海平面以下两个不同深度的大气μ子速率:KM3NeT-ARCA 3.5 km和KM3NeT-ORCA 2.5 km。在中微子望远镜中,大气μ子是一种丰富的信号,可用于测试蒙特卡罗模拟链的可靠性,并研究高能初级核撞击地球大气层所引起的大范围空气簇射的物理学。在高于PeV的能量下,在簇射中第一次相互作用后立即产生的瞬发μ子的贡献预计将占主导地位,但它的存在尚未得到实验证实。在这次演讲中,收集的数据与第一检测单位的KM3NeT相比,蒙特卡罗模拟的基础上MUPAGE和CORSIKA代码。的模拟和重建链的主要特点。此外,还讨论了利用CORSIKA对KM3NeT-ARCA和KM3NeT-ORCA的瞬发μ子分量模拟信号的初步结果。

英文摘要:

The KM3NeT Collaboration has successfully deployed the first detection units of the next generation undersea neutrino telescopes in the Mediterranean Sea at the two sites in Italy and in France. The data sample collected between December 2016 and January 2020 has been used to measure the atmospheric muon rate at two different depths under the sea level: 3.5 km with KM3NeT-ARCA and 2.5 km with KM3NeT-ORCA. Atmospheric muons represent an abundant signal in a neutrino telescope and can be used to test the reliability of the Monte Carlo simulation chain and to study the physics of extensive air showers caused by highly-energetic primary nuclei impinging the Earth's atmosphere. At energies above PeV the contribution from prompt muons, created right after the first interaction in the shower, is expected to become dominant, however its existence has not yet been experimentally confirmed. In this talk, data collected with the first detection units of KM3NeT are compared to Monte Carlo simulations based on MUPAGE and CORSIKA codes. The main features of the simulation and reconstruction chains are presented. Additionally, the first results of the simulated signal from the prompt muon component for KM3NeT-ARCA and KM3NeT-ORCA obtained with CORSIKA are discussed.

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