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arXiv 0904.3489hep-phastro-ph.HE
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超高能τ轻子和中微子掠过地球时的传播

The propagation of ultra-high energy tau leptons and neutrinos while skimming the Earth

O. Blanch Bigas, O. Deligny, K. Payet, V. Van Elewyck

摘要:

掠地τ中微子的探测已经成为UHE宇宙中微子观测的一个非常有前途的策略。这个通道的灵敏度关键取决于τ中微子(和τ轻子)通过地壳的传播参数,这决定了可以检测到的新兴τ轻子的通量。这个传播问题通常在一个简化的框架中处理,其中忽略了几个影响,例如τ中微子多次再生的可能性,τ轻子的弱相互作用,以及其能量损失的随机性。本文通过研究具有单能谱和幂律谱的τ轻子和中微子在标准岩石中的传播,讨论了这种近似的有效性。我们还研究了这种简化在非标准情况下对中微子-核子相互作用以及τ能量损失的影响。

英文摘要:

The detection of Earth-skimming tau neutrinos has turned into a very promising strategy for the observation of UHE cosmic neutrinos. The sensitivity of this channel crucially depends on the parameters of the propagation of the tau neutrino (and the tau lepton) through the terrestrial crust, which governs the flux of emerging tau leptons that can be detected. This propagation problem is usually treated in a simplified framework where several effects are neglected, e.g. the possibility of multiple regenerations of the tau neutrino, the weak interactions of the tau lepton, as well as the stochastic nature of its energy losses. We discuss here the validity of such approximations by studying the propagation in standard rock of tau leptons and neutrinos with both mono-energetic and power-law spectra. We also investigate the impact of such simplifications in non-standard scenarios for the neutrino-nucleon interactions as well as for the tau energy losses.

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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