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arXiv 0910.4259hep-ph
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深水/冰中单μ子和多μ子通量和能谱的参数化

A parameterisation of the flux and energy spectrum of single and multiple muons in deep water/ice

M. Bazzotti, S. Biagi, G. Carminati, S. Cecchini, T. Chiarusi, G. Giacomelli, A. Margiotta, M. Sioli, M. Spurio

摘要:

本文给出了垂直深度在1.5 ~ 5 km水当量范围内的大气μ子通量的参数公式。天顶角可达85 °。我们考虑到他们的到来束不同的μ子多重性。考虑到μ子到束轴的距离,束内μ子的能量被计算出来。这种参数化依赖于对初级宇宙线(CR)相互作用、大气中的簇射传播和深水中的μ子输运的完整蒙特卡罗模拟[1]。主要的CR通量和相互作用模型,在它们可以产生μ子的范围内,μ子可以达到1.5 km w.e.,实验不确定性很大。我们使用了一个初级CR通量和一个相互作用模型,能够正确地再现通量,多重性分布,μ子之间的空间距离,由地下MACRO实验测量。

英文摘要:

In this paper parametric formulas are presented to evaluate the flux of atmospheric muons in the range of vertical depth between 1.5 to 5 km of water equivalent (km w.e.) and up to 85^o for the zenith angle. We take into account their arrival in bundles with different muon multiplicities. The energy of muons inside bundles is then computed considering the muon distance from the bundle axis. This parameterisation relies on a full Monte Carlo simulation of primary Cosmic Ray (CR) interactions, shower propagation in the atmosphere and muon transport in deep water [1]. The primary CR flux and interaction models, in the range in which they can produce muons which may reach 1.5 km w.e., suffer from large experimental uncertainties. We used a primary CR flux and an interaction model able to correctly reproduce the flux, the multiplicity distribution, the spatial distance between muons as measured by the underground MACRO experiment.

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