DEAP-3600在SNOLAB使用氩进行暗物质搜索的首批结果
宇宙学与河外天体物理
2018-08-21 v4 天体物理仪器与方法
高能物理 - 实验
高能物理 - 唯象学
摘要
本文报告了使用DEAP-3600单相液态氩（LAr）探测器进行直接暗物质搜索的首批结果。该实验在加拿大萨德伯里的SNOLAB地下2公里处进行，利用大质量靶，将LAr靶容纳在一个容量为3600公斤的球形丙烯酸容器中。LAr由光电倍增管阵列观测，这些光电倍增管将记录由暗物质粒子散射引起的稀有核反冲信号产生的闪烁光。对在初始填充阶段使用近乎满装的探测器获取的4.44个活天（有效曝光量为9.87吨·天）数据进行的分析，展示了探测器性能以及氩中利用脉冲形状甄别实现的最佳电子反冲排除能力，在16至33 keV能量区间内的泄漏率（90%置信水平）。未观测到候选信号事件，这给出了氩上WIMP-核子自旋无关截面的领先上限，对于100 GeV/c的WIMP质量，该截面 cm（90%置信水平）。
引用
@article{arxiv.1707.08042,
title = {First results from the DEAP-3600 dark matter search with argon at SNOLAB},
author = {3600 Collaboration and P. -A. Amaudruz and M. Baldwin and M. Batygov and B. Beltran and C. E. Bina and D. Bishop and J. Bonatt and G. Boorman and M. G. Boulay and B. Broerman and T. Bromwich and J. F. Bueno and P. M. Burghardt and A. Butcher and B. Cai and S. Chan and M. Chen and R. Chouinard and B. T. Cleveland and D. Cranshaw and K. Dering and J. DiGioseffo and S. Dittmeier and F. A. Duncan and M. Dunford and A. Erlandson and N. Fatemighomi and S. Florian and A. Flower and R. J. Ford and R. Gagnon and P. Giampa and V. V. Golovko and P. Gorel and R. Gornea and E. Grace and K. Graham and E. Gulyev and R. Hakobyan and A. Hall and A. L. Hallin and M. Hamstra and P. J. Harvey and C. Hearns and C. J. Jillings and O. Kamaev and A. Kemp and M. Kuźniak and S. Langrock and F. La Zia and B. Lehnert and J. J. Lidgard and C. Lim and T. Lindner and Y. Linn and S. Liu and P. Majewski and R. Mathew and A. B. McDonald and T. McElroy and T. McGinn and J. B. McLaughlin and S. Mead and R. Mehdiyev and C. Mielnichuk and J. Monroe and A. Muir and P. Nadeau and C. Nantais and C. Ng and A. J. Noble and E. O'Dwyer and C. Ohlmann and K. Olchanski and K. S. Olsen and C. Ouellet and P. Pasuthip and S. J. M. Peeters and T. R. Pollmann and E. T. Rand and W. Rau and C. Rethmeier and F. Retière and N. Seeburn and B. Shaw and K. Singhrao and P. Skensved and B. Smith and N. J. T. Smith and T. Sonley and J. Soukup and R. Stainforth and C. Stone and V. Strickland and B. Sur and J. Tang and J. Taylor and L. Veloce and E. Vázquez-Jáuregui and J. Walding and M. Ward and S. Westerdale and E. Woolsey and J. Zielinski},
journal= {arXiv preprint arXiv:1707.08042},
year = {2018}
}
备注
Accepted for publication in Physical Review Letters