使用Askaryan Radio Array的低阈值超高能中微子搜寻
高能天体物理现象
2022-07-13 v1 天体物理仪器与方法
摘要
在测量仍难以捉摸的EeV量级超高能（UHE）中微子流的追求中，使用冰内Askaryan射电技术的探测器已日益瞄准更低的触发阈值。这导致了对UHE中微子改进的触发级灵敏度。利用Askaryan Radio Array（ARA）收集的数据，我们以迄今实现的最低阈值搜寻中微子候选者，从而获得改进的分析级灵敏度。对来自降低阈值的第五个ARA站的208.7天存活时间数据集进行中微子搜寻，在对模拟的混合成分中微子流上实现了所有能量68%的分析效率，预期有个事件通过分析与背景相符。我们观测到一个事件通过我们的分析，并继续使用Feldman-Cousins构造设定中微子流上限。我们表明改进的触发级灵敏度可贯穿至分析中，这推动了相控阵触发技术在未来射电探测实验中的使用。我们还包含了使用该探测器所有可用数据的投影。最后，我们发现未来分析将受益于对近地表事件的研究，以充分理解大规模探测器预期的背景。
引用
@article{arxiv.2202.07080,
title = {A low-threshold ultrahigh-energy neutrino search with the Askaryan Radio Array},
author = {P. Allison and S. Archambault and J. J. Beatty and D. Z. Besson and A. Bishop and C. C. Chen and C. H. Chen and P. Chen and Y. C. Chen and B. A. Clark and W. Clay and A. Connolly and L. Cremonesi and P. Dasgupta and J. Davies and S. de Kockere and K. D. de Vries and C. Deaconu and M. A. DuVernois and J. Flaherty and E. Friedman and R. Gaior and J. Hanson and N. Harty and B. Hendricks and K. D. Hoffman and E. Hong and S. Y. Hsu and L. Hu and J. J. Huang and M. -H. Huang and K. Hughes and A. Ishihara and A. Karle and J. L. Kelley and K. -C. Kim and M. -C. Kim and I. Kravchenko and R. Krebs and Y. Ku and C. Y. Kuo and K. Kurusu and H. Landsman and U. A. Latif and C. -J. Li and T. -C. Liu and M. -Y. Lu and B. Madison and K. Madison and K. Mase and T. Meures and J. Nam and R. J. Nichol and G. Nir and A. Novikov and A. Nozdrina and E. Oberla and J. Osborn and Y. Pan and C. Pfendner and N. Punsuebsay and J. Roth and D. Seckel and M. F. H. Seikh and Y. -S. Shiao and A. Shultz and D. Smith and S. Toscano and J. Torres and J. Touart and N. van Eijndhoven and G. S. Varner and A. Vieregg and M. -Z. Wang and S. -H. Wang and Y. H. Wang and S. A. Wissel and C. Xie and S. Yoshida and R. Young},
journal= {arXiv preprint arXiv:2202.07080},
year = {2022}
}
备注
15 pages, 8 figures