用ARIANNA试验台用4.5年的数据搜寻宇宙成因中微子
A search for cosmogenic neutrinos with the ARIANNA test bed using 4.5 years of data
摘要：
阿里安纳超高能中微子望远镜的主要任务是发现能量大于$10^{16}\mathrm{eV}$的中微子的天体物理来源。2014年11月，由位于南极洲罗斯冰架表面的7个ARIANNA站组成的试验阵列投入使用。我们报告了使用2014年11月至2019年2月收集的数据搜索天体物理中微子的情况。直接的模板匹配分析没有产生中微子候选者，信号效率为79%。我们发现一个90%的置信上限上的扩散中微子通量的$E^2Φ=1.7\times 10^{-6}\mathrm{GeV cm^{-2}s^{-1}sr^{-1}}$为十年宽的对数箱为中心的中微子能量$10^{18}\mathrm{eV}$，这是一个数量级的改进相比，以前的限制由ARIANNA合作报告。ARIANNA台站，包括在摩尔湾站点专门建造的宇宙射线台站和在南极的演示台站，都在可靠地运行。在两个不同地点的持续运行证实了灵活和适应性强的架构可以部署在任何深冰，无线电安静的环境中。我们表明，科学能力，技术创新，和后勤要求的ARIANNA足够好的理解，作为大面积无线电为基础的中微子望远镜的基础，具有广泛的视野。
英文摘要：
The primary mission of the ARIANNA ultra-high energy neutrino telescope is to uncover astrophysical sources of neutrinos with energies greater than $10^{16}\mathrm{eV}$. A pilot array, consisting of seven ARIANNA stations located on the surface of the Ross Ice Shelf in Antarctica, was commissioned in November 2014. We report on the search for astrophysical neutrinos using data collected between November 2014 and February 2019. A straight-forward template matching analysis yielded no neutrino candidates, with a signal efficiency of 79%. We find a 90% confidence upper limit on the diffuse neutrino flux of $E^2Φ=1.7\times 10^{-6}\mathrm{GeV cm^{-2}s^{-1}sr^{-1}}$ for a decade wide logarithmic bin centered at a neutrino energy of $10^{18}\mathrm{eV}$, which is an order of magnitude improvement compared to the previous limit reported by the ARIANNA collaboration. The ARIANNA stations, including purpose built cosmic-ray stations at the Moore's Bay site and demonstrator stations at the South Pole, have operated reliably. Sustained operation at two distinct sites confirms that the flexible and adaptable architecture can be deployed in any deep ice, radio quiet environment. We show that the scientific capabilities, technical innovations, and logistical requirements of ARIANNA are sufficiently well understood to serve as the basis for large area radio-based neutrino telescope with a wide field-of-view.
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