EDELWEISS暗物质搜寻中的μ子诱导本底
宇宙学与河外天体物理
2013-03-05 v1 天体物理仪器与方法
仪器与探测器
摘要
对EDELWEISS暗物质搜寻中μ子诱导本底进行了专门分析，所用数据集采集于2009年和2010年。测得莫达讷地下实验室(LSM)的地下总μ子通量为 muons/m/d。μ子反符合探测器的模块化设计允许重建μ子轨迹，从而确定LSM中随角度变化的μ子通量。结果与蒙特卡洛模拟及早期测量均吻合良好。将μ子反符合探测器与锗探测器阵列的声子和电离信号同步，可识别μ子诱导事件。提取了所有μ子诱导事件率和类WIMP事件率。经反符合剔除后，EDELWEISS-II暗物质搜寻中剩余可接受的μ子诱导中子率确定为 (90%置信水平)。基于这些结果，对EDELWEISS-3预期曝光量3000 kg·d的μ子诱导本底预期为个事件。
引用
@article{arxiv.1302.7112,
title = {Muon-induced background in the EDELWEISS dark matter search},
author = {The EDELWEISS collaboration and B. Schmidt and E. Armengaud and C. Augier and A. Benoit and L. Bergé and T. Bergmann and J. Blümer and G. Bres and A. Broniatowski and V. Brudanin and B. Censier and M. Chapellier and F. Charlieux and S. Collin and P. Coulter and G. A. Cox and O. Crauste and J. Domange and L. Dumoulin and K. Eitel and D. Filosofov and N. Fourches and G. Garde and J. Gascon and G. Gerbier and M. Gros and L. Hehn and S. Henry and S. Hervé and G. Heuermann and A. Juillard and H. Kluck and V. Y. Kozlov and M. Kleifges and H. Kraus and V. A. Kudryavtsev and P. Loaiza and S. Marnieros and A. Menshikov and X. -F. Navick and H. Nieder and C. Nones and E. Olivieri and P. Pari and B. Paul and M. Robinson and H. Rodenas and S. Rozov and V. Sanglard and B. Siebenborn and D. Tcherniakhovski and A. S. Torrentó-Coello and L. Vagneron and R. J. Walker and M. Weber and E. Yakushev and X. Zhang},
journal= {arXiv preprint arXiv:1302.7112},
year = {2013}
}
备注
21 pages, 16 figures, Accepted for publication in Astropart. Phys