中微子望远镜将在未来几年内为观测高能天体物理学提供新的机会。在这些实验中，来自大气中初级宇宙射线相互作用的大气μ子起着重要作用，因为它们为校准和测试提供了最丰富的事件源。另一方面，它们是主要的背景来源。本文介绍了一种用于水下/冰中微子望远镜的大气μ子束快速蒙特卡罗发生器（简称MUPAGE）。MUPAGE是基于参数公式[APP 25（2006）1]，该公式是从宇宙射线簇射的完整蒙特卡罗模拟中获得的，宇宙射线簇射在束中产生μ子，其向下传播到5 km w.e.。它在用户定义的虚拟圆柱体的表面上产生事件运动学，围绕探测器。根据一个特定的初级宇宙线通量模型，利用地下实验测量的μ子通量，模拟了束中μ子的多重数、μ子的空间分布和能谱。作为应用的一个例子，给出了在水深为2450 m、面积为3 km^2的圆柱面上产生同相轴的结果。
英文摘要：
Neutrino telescopes will open, in the next years, new opportunities in observational high energy astrophysics. For these experiments, atmospheric muons from primary cosmic ray interactions in the atmosphere play an important role, because they provide the most abundant source of events for calibration and test. On the other side, they represent the major background source.
In this paper a fast Monte Carlo generator (called MUPAGE) of bundles of atmospheric muons for underwater/ice neutrino telescopes is presented. MUPAGE is based on parametric formulas [APP25(2006)1] obtained from a full Monte Carlo simulation of cosmic ray showers generating muons in bundle, which are propagated down to 5 km w.e. It produces the event kinematics on the surface of a user-defined virtual cylinder, surrounding the detector. The multiplicity of the muons in the bundle, the muon spatial distribution and energy spectrum are simulated according to a specific model of primary cosmic ray flux, with constraints from measurements of the muon flux with underground experiments. As an example of the application, the result of the generation of events on a cylindrical surface of 3 km^2 at a depth of 2450 m of water is presented.
Comparison of the measured atmospheric muon rate with Monte Carlo simulations and sensitivity study for detection of prompt atmospheric muons with KM3NeT
Comparison of the measured atmospheric muon rate with Monte Carlo simulations and sensitivity study for detection of prompt atmospheric muons with KM3NeT
