MAJORANA Demonstrator 的初步结果
仪器与探测器
2017-12-01 v1 核实验
摘要
MAJORANA 合作组组装了一个高纯锗探测器阵列，用于在 Ge 中搜寻无中微子双贝塔衰变，目标是确立基于 Ge 的下一代吨量级实验所需的本底与可扩展性。MAJORANA DEMONSTRATOR 由 44 kg 高纯锗（HPGe）探测器（其中 30 kg 富集 Ge）组成，采用低噪声 p 型点接触（PPC）几何结构。探测器分置于两个模块中，封装于南达科他州 Lead 市 Sanford 地下研究设施内的单一铅与高纯铜屏蔽体中。在 2015 年 6 月启动的调试运行之后，完整探测器阵列自 2016 年 8 月起开始获取数据。我们将讨论 MAJORANA DEMONSTRATOR 的状态及首次物理运行的初步结果；包括当前本底估计、奇异低能物理搜寻、DEMONSTRATOR 物理探测范围的预测，以及对吨量级基于 Ge 的无中微子双贝塔衰变搜寻的意义。
引用
@article{arxiv.1711.11145,
title = {Initial Results from the Majorana Demonstrator},
author = {T. S. Caldwell and N. Abgrall and S. I. Alvis and I. J. Arnquist and F. T. Avignone and A. S. Barabash and C. J. Barton and F. E. Bertrand and T. Bode and B. Bos and A. W. Bradley and V. Brudanin and M. Busch and M. Buuck and Y-D. Chan and C. D. Christofferson and P. -H. Chu and C. Cuesta and J. A. Detwiler and C. Dunagan and Yu. Efremenko and H. Ejiri and S. R. Elliott and T. Gilliss and G. K. Giovanetti and M. P. Green and J. Gruszko and I. S. Guinn and V. E. Guiseppe and C. R. Haufe and L. Hehn and R. Henning and E. W. Hoppe and M. A. Howe and K. J. Keeter and M. F. Kidd and S. I. Konovalov and R. T. Kouzes and A. M. Lopez and R. D. Martin and R. Massarczyk and S. J. Meijer and S. Mertens and J. Myslik and C. O'Shaughnessy and G. Othman and W. Pettus and A. W. P. Poon and D. C. Radford and J. Rager and A. L. Reine and K. Rielage and R. G. H. Robertson and N. W. Ruof and B. Shanks and M. Shirchenko and A. M. Suriano and D. Tedeschi and J. E. Trimble and R. L. Varner and S. Vasilyev and K. Vetter and K. Vorren and B. R. White and J. F. Wilkerson and C. Wiseman and W. Xu and E. Yakushev and C. -H. Yu and V. Yumatov and I. Zhitnikov and B. X. Zhu},
journal= {arXiv preprint arXiv:1711.11145},
year = {2017}
}
备注
Proceedings of TAUP 2017: XV International Conference on Topics in Astroparticle and Underground Physics (24-28 July 2017, Sudbury, ON, Canada)