High precision tests of the running of the weak mixing angle with the MOLLER and P2 experiments

通过MOLLER和P2实验对弱混合角运行进行高精度测试

• 批准号: SAPPJ-2019-00049
• 负责人: Gericke, Michael
• 金额: $ 15.3万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Subatomic Physics Envelope - Project
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=739458
• 关键词: precision; tests; running; weak; mixing

The experiments we carry out aim to measure the interaction properties between pairs of electrons and quarks down to separation distances of zeptometer (roughly a million times smaller than the size of the smallest atomic nucleus) to unprecedented accuracy. It is widely expected that completely new interactions may be found at such small distances, including those that couple to dark matter, and may explain some of the deepest unanswered questions in particle physics and cosmology (such as the large matter - antimatter asymmetry). The existence of dark matter is the leading explanation for astrophysical phenomena, such as anomalous galactic rotation speeds. The search for dark matter, and new physics that couples to it, is currently at the forefront of the worldwide research effort in subatomic physics. The most innovative aspects of the proposed project are encapsulated in our technical solutions to the extreme challenges involved in making a clean measurement to the proposed accuracy. The MOLLER electron interaction experiment will be a cornerstone of the scientific program at the recently upgraded Thomas Jefferson National Accelerator Facility JLab , a premier electron beam accelerator laboratory located in Newport News, USA, funded by the US Department of Energy (DOE). The experiment is an international effort involving collaborators from the USA and Canada (the lead countries), as well as Germany, Italy, France, and Mexico. The P2 quark interaction experiment is currently under construction at the MESA facility in Mainz, Germany and involves collaborators from Germany, the USA, and Canada. The primary benefits of fundamental research like this are the generation of new knowledge and understanding about nature, the international visibility that high profile efforts like this create for Canada, possible spin-off technologies, and the unique training of highly qualified personnel (HQP) for the technology sector. Some of the needed detector development for these efforts will have a new type of photosensitive readout device that combines modern day microchip technology with precision low noise analog electronics into a single detector unit. These devices could eventually be marketable in the medical diagnostic sector or for personal radiation monitoring. These are large projects with a high capacity for training of HQP from several fields of study beyond physics, including engineering, and computer science. Students and postdocs on this project will acquire a broad set of skills, both on the design and the practical side, including working with sensors, micro-electronics, mechanical assemblies, high vacuum systems, large scale programming, and large data set analysis. These people will have the skill set to be invaluable employees or entrepreneurs in many different sectors, including but not limited to the, information technology, medical, energy, financial, or public sectors.

我们进行的实验旨在测量电子和夸克对之间的相互作用特性，直到zepmeter的分离距离（大约比最小原子核的大小小一百万倍）达到前所未有的精度。人们普遍预计，在如此小的距离上可能会发现全新的相互作用，包括那些与暗物质耦合的相互作用，并可能解释粒子物理学和宇宙学中一些最深层次的未回答的问题（例如大物质-反物质不对称性）。暗物质的存在是天体物理现象的主要解释，例如异常的星系旋转速度。对暗物质以及与之相关的新物理学的探索，目前处于亚原子物理学全球研究工作的前沿。该项目最具创新性的方面包含在我们的技术解决方案中，以应对在进行清洁测量时所面临的极端挑战。MOLLER电子相互作用实验将成为最近升级的托马斯杰斐逊国家加速器设施JLab的科学计划的基石，JLab是位于美国纽波特纽斯的首屈一指的电子束加速器实验室，由美国能源部（DOE）资助。这项实验是一项国际性的努力，涉及来自美国和加拿大（牵头国家）以及德国、意大利、法国和墨西哥的合作者。P2夸克相互作用实验目前正在德国美因茨的梅萨设施中进行，并涉及来自德国，美国和加拿大的合作者。像这样的基础研究的主要好处是产生新的知识和对自然的理解，像这样的高调努力为加拿大创造的国际知名度，可能的副产品技术，以及为技术部门提供高素质人才（HQP）的独特培训。这些努力所需的一些探测器开发将有一种新型的光敏读出设备，它将现代微芯片技术与精密低噪声模拟电子技术结合到一个单一的探测器单元中。这些设备最终可以在医疗诊断部门或个人辐射监测中销售。这些都是大型项目，具有很高的能力，从物理学以外的几个研究领域，包括工程和计算机科学的HQP培训。该项目的学生和博士后将获得设计和实践方面的广泛技能，包括使用传感器，微电子，机械组件，高真空系统，大规模编程和大型数据集分析。这些人将拥有成为许多不同部门的宝贵员工或企业家的技能，包括但不限于信息技术，医疗，能源，金融或公共部门。