Development of the St. Benedict Paul Trap at the Nuclear Science Laboratory

Development of the St. Benedict Paul Trap at the Nuclear Science Laboratory
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核科学实验室圣本笃保罗陷阱的开发

DOI:
10.1007/s10751-019-1630-7
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发表时间:
2019
影响因子:
--
通讯作者:
Burdette D., Brodeur M.
Burdette D., Brodeur M.
中科院分区:
--
文献类型:
--
作者:
Burdette D., Brodeur M.

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标准模型有各种旨在探索新物理的测试。其中一个测试是检查 Cabbibo-Kobayashi-Masakawa 矩阵的幺正性,最精确的结果由顶行的归一化给出。该结果的精度受到 Vudand Vuselements 不确定性的限制。目前,Vudis 最精确的结果来自于超允许的 0+→ 0+核β衰变的集合,但其他跃迁的确定对于检查理论计算和未知系统贡献的潜在存在是可取的。其他候选者包括中子衰变、π介子衰变和核镜衰变的集合。虽然中子和π介子衰变提出了自己独特的实验挑战,但镜面衰变组需要精确确定费米与伽莫夫泰勒混合比。该值可以从 β-ν 角度相关参数 αβν 的测量中提取,目前仅知道 5 个镜面衰减。位于圣母大学核科学实验室的新离子捕获系统 St. Benedict(超级允许跃迁β中微子衰变离子符合陷阱)目前正在建设中,最终目标是提取αβν以进行更多镜面衰变。这项工作的重点是模拟,这将指导用于测量的保罗陷阱的设计。
There are various tests of the Standard Model aimed at probing new physics. One such test is to check the unitarity of the Cabbibo-Kobayashi-Masakawa matrix, with the most precise result given by the normalization of the top row. The precision of this result is limited by the uncertainty of the Vudand Vuselements. The most precise result for Vudis currently derived from the ensemble of superallowed 0+→ 0+nuclearβdecays, but the determination from other transitions is desirable to check theoretical calculations and the potential presence of unknown systematic contributions. Other candidates include neutron decay, pion decay, and the ensemble of nuclear mirror decays. While the neutron and pion decay present their own unique experimental challenges, the group of mirror decays require the precise determination of the Fermi to Gamow-Teller mixing ratio. This value can be extracted from a measurement of theβ-νangular correlation parameter,αβν, which is currently only known for five mirror decays. A new ion trapping system, St. Benedict (Superallowed Transition Beta-Neutrino Decay-Ion-Coincidence Trap), to be located in the Nuclear Science Laboratory at the University of Notre Dame is currently under construction and will ultimately aim to extractαβνfor more mirror decays. The focus of this work is on simulations that will guide the design of the Paul trap which will be used for the measurement.
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