RUI: A Precision Measurement of the Electron-Antineutrino Correlation in Neutron Decay Using the aCORN Apparatus

RUI：使用 aCORN 装置精确测量中子衰变中的电子-反中微子相关性

• 批准号: 1307332
• 负责人: Alexander Komives
• 金额: $ 9万
• 依托单位: DePauw University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-08-01 至 2017-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1307332&HistoricalAwards=false
• 关键词: RUI; Precision; Measurement; Electron; Antineutrino

The electroweak standard model describes two of the four fundamental forces present in the universe. By conducting experiments that probe with increasing sensitivity phenomena that can be described with this model, it is hoped discrepancies will appear that will lead to a more complete understanding of the weak interaction which is responsible for the decay, or transformation, of the neutron into a proton, electron and antineutrino. Among the measurements that can be made involving neutron decay are correlations between the properties of the neutron and its decay products. One of these correlations, known as little "a", involves the direction of emission of the electron and antineutrino from the decay region. Other neutron decay correlations are known to within 1%, but little "a" is only known to 4%. After several years of planning and construction, the aCORN ("a" CORrelation in Neutron decay) collaboration is in the process of collecting data on the fundamental physics beamline at the NIST (National Institute of Standards and Technology) Center for Neutron Research (NCNR). This grant will provide support that will allow DePauw University undergraduate students and the Principal Investigator to continue participating in the experiment.

电弱标准模型描述了宇宙中存在的四种基本力中的两种。 通过进行实验，探测可以用这个模型描述的越来越敏感的现象，希望出现差异，这将导致更完整的理解弱相互作用，这是中子衰变或转化为质子，电子和反中微子的原因。 在中子衰变的测量中，可以测量中子及其衰变产物的性质之间的相关性。 其中一个相关性，称为小“a”，涉及电子和反中微子从衰变区发射的方向。 其他的中子衰变相关性已知在1%以内，但小“a”只知道4%。 经过几年的规划和建设，aCORN（中子衰变中的“a”CORrelation）合作正在NIST（国家标准与技术研究所）中子研究中心（NCNR）收集基础物理光束线的数据。 这笔赠款将提供支持，使DePauw大学本科生和主要研究者继续参与实验。