Hall Reno Mary, Krizmanic John F, Venters Tonia M
Department of Physics and Astronomy, University of Iowa, Iowa City, IA 52242, USA.
CRESST/NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.
Phys Rev D. 2019 Sep 15;100(6). doi: 10.1103/physrevd.100.063010. Epub 2019 Sep 18.
We perform a new, detailed calculation of the flux and energy spectrum of Earth-emerging leptons generated from the interactions of tau neutrinos and antineutrinos in the Earth. A layered model of the Earth is used to describe the variable density profile of the Earth. Different assumptions regarding the neutrino charged- and neutral-current cross sections as well as the -lepton energy loss models are used to quantify their contributions to the systematic uncertainty. A baseline simulation is then used to generate the optical Cherenkov signal from upward-moving extensive air showers generated by the -lepton decay in the atmosphere, applicable to a range of space-based instruments. We use this simulation to determine the neutrino sensitivity for ≳ 10 PeV for a space-based experiment with performance similar to that for the Probe of Extreme Multi-Messenger Astrophysics (POEMMA) mission currently under study.
我们对由地球中τ中微子和反中微子相互作用产生的出射地球轻子的通量和能谱进行了全新的详细计算。采用地球分层模型来描述地球的可变密度剖面。关于中微子带电和中性流截面以及轻子能量损失模型的不同假设，用于量化它们对系统不确定性的贡献。然后使用基线模拟来生成由大气中轻子衰变产生的向上传播的广延空气簇射的光学切伦科夫信号，该信号适用于一系列天基仪器。我们利用这个模拟来确定一个性能与目前正在研究的极端多信使天体物理学探测器（POEMMA）任务相似的天基实验对于≳10 PeV的中微子灵敏度。
