Neutrinoless Double-Beta Decay and Axion Searches

无中微子双贝塔衰变和轴子搜索

• 批准号: 1812356
• 负责人: Wenqin Xu
• 金额: $ 32.71万
• 依托单位: University of South Dakota Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-07-01 至 2022-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1812356&HistoricalAwards=false
• 关键词: Neutrinoless; Double; Beta; Decay; Axion

Neutrinoless Double-Beta Decay (NLDBD) is the only experimentally viable way to probe the particle-antiparticle nature of neutrinos. If neutrinos are their own antiparticles, the empirical conservation of total lepton number will be immediately violated, which will shed light on the fundamental question of matter over anti-matter excess in the Universe. Further, NLDBD is the key to understanding the beyond Standard Model non-zero neutrino mass. A next generation NLDBD experiment will have a significant potential to observe this long-sought decay, with far reaching implications that can revolutionize our understanding of the Universe. The PI's involvement in NLDBD experiments is aligned with the state's goal of economic development and allows the state to benefit in the exciting research occurring at the Sanford Underground Research Facility (SURF). Using the USD High Performance Computing (HPC) platform to solve cutting-edge physics problems will train USD students in computation skills that are in great demand in a modern society. The planned activities will engage local communities and will leverage existing NSF infrastructure investments at USD to foster a diverse STEM workforce.This award will support research activities contributing to the operation of the Majorana Demonstrator (MJD) NLDBD experiment. It will also support R&D efforts that address critical questions for the Large Enriched Germanium Experiment for Neutrinoless Double Beta Decay (LEGEND) project, one of the proposed next generation NLDBD experiments. Research activities will include (1) support for onsite operation at SURF and offsite monitoring, and (2) search for solar axions using correlated signals from multiple detectors. The R&D efforts for the LEGEND experiment focus on developing and performing simulation studies to gain a quantitative and comprehensive understanding of muon-induced backgrounds for LEGEND. The low background in the MJD experiment also allows the search for solar axions. Axions were postulated to solve the strong charge parity problem in the nuclear force. The search for axions could deepen our understanding of the nuclear force. This award will allow competitive searches of solar axions at MJD using a method correlating signals from multiple High-Purity Ge (HPGe) detectors developed at USD.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

中微子双β衰减（NLDBD）是探测中微子粒子 - 抗粒子性质的唯一可行的可行方法。 如果中微子是他们自己的反粒子，则将立即违反对整体数量的经验保护，这将揭示出关于宇宙中反物质过剩的基本问题。此外，NLDBD是了解超出标准模型非零中微子质量的关键。下一代NLDBD实验将具有观察这种长期衰变的巨大潜力，其含义很大，可以彻底改变我们对宇宙的理解。 PI参与NLDBD实验与该州的经济发展目标保持一致，并使该州能够在Sanford Underground Research Stancity（SURF）进行的令人兴奋的研究中受益。使用USD高性能计算（HPC）平台来解决尖端物理问题，将培训美元的学生的计算技能，这些计算技能在现代社会中需求很大。计划的活动将吸引当地社区，并将利用USD的现有NSF基础设施投资来培养多样化的STEM劳动力。该奖项将支持有助于Majoraana示威者（MJD）NLDBD实验运作的研究活动。它还将支持研发工作，以解决大型富集的锗实验中中子双β衰减（传奇）项目的关键问题，这是拟议的下一代NLDBD实验之一。研究活动将包括（1）支持在冲浪和异地监控的现场操作，以及（2）使用来自多个检测器的相关信号搜索太阳轴。传奇实验的研发工作集中于制定和执行模拟研究，以获得对穆恩引起的传奇背景的定量和全面理解。 MJD实验中的低背景还允许搜索太阳轴。假设轴是为了解决核力量中强的电荷奇偶校验问题。寻找斧头可以加深我们对核力量的理解。该奖项将允许使用USD开发的多个高纯度GE（HPGE）探测器的方法对MJD进行太阳轴的竞争搜索。该奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子优点和更广泛的影响审查标准来通过评估来通过评估来支持的。

项目成果

ADC Nonlinearity Correction for the Majorana Demonstrator

• DOI: 10.1109/tns.2020.3043671
• 发表时间: 2021-03-01
• 期刊: IEEE TRANSACTIONS ON NUCLEAR SCIENCE
• 影响因子: 1.8
• 作者: Abgrall, N.;Allmond, J. M.;Shanks, B.
• 通讯作者: Shanks, B.

Signatures of muonic activation in the Majorana Demonstrator

马约拉纳演示器中μ子激活的特征

• DOI: 10.1103/physrevc.105.014617
• 发表时间: 2022
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: Arnquist, I. J.;Avignone, F. T.;Barabash, A. S.;Barton, C. J.;Bertrand, F. E.;Blalock, E.;Bos, B.;Busch, M.;Buuck, M.;Caldwell, T. S.
• 通讯作者: Caldwell, T. S.

Search for trinucleon decay in the MAJORANA DEMONSTRATOR

• DOI: 10.1103/physrevd.99.072004
• 发表时间: 2019-04-12
• 期刊: PHYSICAL REVIEW D
• 影响因子: 5
• 作者: Alvis, S. I.;Arnquist, I. J.;Zhu, B. X.
• 通讯作者: Zhu, B. X.

Multisite event discrimination for the MAJORANA DEMONSTRATOR

• DOI: 10.1103/physrevc.99.065501
• 发表时间: 2019-06-07
• 期刊: PHYSICAL REVIEW C
• 影响因子: 3.1
• 作者: Alvis, S., I;Arnquist, I. J.;Zhu, B. X.
• 通讯作者: Zhu, B. X.

The Majorana Demonstrator readout electronics system

马约拉纳演示器读出电子系统

• DOI: 10.1088/1748-0221/17/05/t05003
• 发表时间: 2022
• 期刊: Journal of Instrumentation
• 影响因子: 1.3
• 作者: Abgrall, N.;Amman, M.;Arnquist, I.J.;Avignone, F.T.;Barabash, A.S.;Barton, C.J.;Barton, P.J.;Bertrand, F.E.;Bhimani, K.H.;Bos, B.
• 通讯作者: Bos, B.