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arXiv 0705.3782hep-phastro-ph
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宇宙射线中的长寿命Staus

Long-lived Staus from Cosmic Rays

Markus Ahlers, Jose Ignacio Illana, Manuel Masip, Davide Meloni

摘要:

高能宇宙射线与高层大气中的核子碰撞可能产生长寿命的重粒子。这样的粒子将非常具有穿透力,因为物质中的能量损失与质量成反比,并且可以从大天顶角到达像冰立方这样的中微子望远镜。在这里,我们研究这种可能性,并集中在长寿命的超对称模型与引力子LSP的状态。信号将是一对μ子样的平行轨道,沿着探测器分开50米。我们评估了μ子对的背景,并表明任何来自天顶角超过80度的事件都可以用宇宙射线产生这些重粒子来解释。

英文摘要:

The collision of a high energy cosmic ray with a nucleon in the upper atmosphere could produce long-lived heavy particles. Such particles would be very penetrating, since the energy loss in matter scales as the inverse mass, and could reach a neutrino telescope like IceCube from large zenith angles. Here we study this possibility and focus on the long-lived stau of SUSY models with a gravitino LSP. The signal would be a pair of muon-like parallel tracks separated by 50 meters along the detector. We evaluate the background of muon pairs and show that any events from zenith angles above 80 degrees could be explained by the production of these heavy particles by cosmic rays.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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