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.

Electroweak标准模型描述了宇宙中存在的四个基本力中的两个。 通过进行可以用这种模型描述的敏感性现象探测的实验，希望会出现差异，这将使对弱衰减或转化的弱相互作用更完整地理解中子，将中子纳入质子，电子和抗雷剂。 在涉及中子衰减的可以进行的测量中，中子的性质与其衰减产物之间的相关性。 这些相关性之一（称为较小的“ A”）涉及电子和抗腐烂区域的抗神经区的发射方向。 已知其他中子衰减相关性在1％以内，但几乎没有4％的“ A”。 经过数年的计划和施工，橡子（中子衰减中的“ A”相关性）在收集NIST（国家标准技术研究所）中子研究中心（NCNR）的基本物理光束线的数据中。 该赠款将提供支持，使DePauw大学的本科生和主要研究人员继续参加实验。