Development of neutrino initiated cascades at mid and high altitudes in the atmosphere
A. D. Supanitsky, G. Medina-Tanco, K. Asano, D. Cline, T. Ebisuzaki, S. Inoue, P. Lipari, A. Santangelo, K. Shinozaki, G. Sigl, Y. Takahashi, M. Teshima
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Proceedings of the 31st ICRC, Lodz, Poland, July 2009
Neutrinos are a very promising messenger at tens of EeV and above. They can be produced by several channels, namely as by products of hadronic interactions at the sources, as the main products of the decay of super massive particles and, in a guaranteed way, as the result of the propagation of UHECR through the bath of microwave relic photons. A new era of very large exposure space observatories, of which the JEM-EUSO mission is a prime example, is on the horizon and, with it, it is even larger the possibility of astrophysical neutrino detection at the highest energies. In the present work we use a combination of the PYTHIA interaction code with the CONEX shower simulation package in order to produce fast one-dimensional simulations of neutrino initiated showers in air. We make a detail study of the structure of the corresponding longitudinal profiles, but focus our physical analysis mainly on the development of showers at mid and high altitudes, where they can be an interesting target for space fluorescence observatories.
A Detailed Study on the Range Fluctuations of $10^{11}$eV to $10^{18}$eV Muons in Water and the Fluctuations of the Cherenkov Lights due to the Accompanied Cascade Showers initiated by Muons
A detailed study on the range fluctuations of 10^{11}eV to 10^{18}eV muons in water and the fluctuations of the Cherenkov light yields due to the accompanied cascade showers initiated by muons. Part1: High Energy Muons
Refining the Greisen Profile for Low-Energy Cosmic Gamma-Rays: Quantifying Deviations Across Altitudes and Zenith Angles
Universidad Técnica Federico Santa María（费德里科·圣玛丽亚技术大学）；Millennium Institute for Subatomic physics at high energy frontier (SAPHIR)（高能前沿亚原子物理学千年研究所（SAPHIR））；Pontificia Universidad Católica de Valparaíso（瓦拉帕莱索天主教 Pontificia 大学）；Instituto de Física, Pontificia Universidad Católica de Valparaíso（瓦拉帕莱索天主教 Pontificia 大学物理研究所）；Departamento de Informática, Universidad Técnica Federico Santa María（费德里科·圣玛丽亚技术大学计算机系）；Centro Cientifico Tecnólogico de Valparaíso (CCTVal), Universidad Técnica Federico Santa María（瓦尔帕莱索科技科学中心（CCTVal），费德里科·圣玛丽亚技术大学）
Bethe-Heitler cascades as a plausible origin of hard spectra in distant TeV blazars
上下文遥远TeV耀变体的甚高能（VHE）$γ$射线测量可以很好地解释由超高能宇宙射线引起的TeV谱。目的。我们开发了一个模型，在遥远的TeV耀变体的硬光谱的一个合理的起源。方法.在该模型中，遥远TeV耀变体中的TeV辐射主要由两个混合分量组成。第一个是相对论电子对同步辐射光子（SSC）的逆康普顿散射产生的光子能量约为1 TeV的内部分量，并对河外背景光吸收进行了修正;第二个是高能质子在星系际空间传播产生的级联辐射产生的光子能量大于1 TeV的外部分量。结果假设合适的模型参数，我们将该模型应用到遥远的TeV耀变体1 ES 0229+200的观测光谱。我们的结果表明：1）观察到的1 ES 0229+200的光谱特性，特别是观察到的光谱的TeV $γ$射线尾，2）预期的TeV $γ$射线谱（光子能量为$>$ 1 TeV，1 ES 0229+200）应与切伦科夫望远镜阵列（CTA）的50小时灵敏度目标相当和大型高空空气簇射观测站（LHAASO）一年观测的微分灵敏度曲线。结论.我们认为，强有力的证据贝特-海特勒级联沿视线的硬光谱在遥远的TeV耀变体的一个合理的起源，可以从VHE观测CTA，LHAASO，HAWC，和HiSCORE。
Multi-TeV $γ$-ray candidates from GRB 221009A: a downturn in the intrinsic $γ$-ray spectrum, an echo of the prompt emission phase, and intergalactic electromagnetic cascades
Institute for Nuclear Research of the Russian Academy of Sciences（俄罗斯科学院核物理研究所）；Aryabhatta Research Institute of Observational Sciences (ARIES)（阿亚巴塔观测科学研究所）；Centre for Astro-Particle Physics (CAPP) and Department of Physics, University of Johannesburg（约翰内斯堡大学天体粒子物理中心及物理系）；Gran Sasso Science Institute（格兰萨索科学研究所）；INFN/Laboratori Nazionali del Gran Sasso（意大利国家核物理研究所/格兰萨索国家实验室）；Department of Physics, Federal State Budget Educational Institution of Higher Education M.V. Lomonosov Moscow State University（莫斯科罗蒙诺索夫国立大学物理系）；Federal State Budget Educational Institution of Higher Education, M.V. Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics (SINP MSU)（莫斯科罗蒙诺索夫国立大学斯科别尔辛核物理研究所）
GRB 221009A的高能γ射线候选者检测揭示了内在谱的下降，可能由火球内中子的光电核相互作用产生，随后产生高能回声辐射。
Simulation of combined radio and radar signals at the Radar Echo Telescope for Cosmic Rays
Radboud University（拉德堡德大学）；Université libre de Bruxelles (ULB)（布鲁塞尔自由大学）；Vrije Universiteit Brussel（布鲁塞尔自由大学）；The Ohio State University（俄亥俄州立大学）；University of Kansas（堪萨斯大学）；Pennsylvania State University（宾夕法尼亚州立大学）；University of Chicago（芝加哥大学）；University of the Basque Country UPV/EHU（巴斯克大学）
