PIENU: Rare Decay Measurements

PIENU：罕见的衰减测量

• 批准号: 157985-2013
• 负责人: Bryman, Douglas
• 金额: $ 4.37万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Subatomic Physics Envelope - Project
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=569523
• 关键词: PIENU; Rare; Decay; Measurements

Precise measurements of rare pion decays which have precise Standard Model predictions enable exacting tests of current theories and searches for new physics at extremely high mass scales. Prominent among such processes is the branching ratio of the decay of the charged pion to an electron and a neutrino which provides the best test of the principle of electron-muon universality and severely constrains hypotheses for physics beyond the Standard Model. The PIENU experiment at TRIUMF is aimed at a measurement of the ratio of rates for pion decay to electrons and muons with an improvement in precision by an order of magnitude. This proposal will support the operation, personnel, and data analysis of the PIENU experiment which is underway.

对稀有π介子衰变的精确测量具有精确的标准模型预测， 测试当前的理论，并在极高的质量尺度上寻找新的物理学。其中， 过程是带电π介子衰变为电子和中微子的分支比，它提供了对电子-μ子普适性原理的最佳测试，并严重限制了标准模型之外的物理学假设。TRIUMF的PIENU实验旨在测量π介子衰变率与电子和μ子的比率，其精度提高了一个数量级。该提案将支持正在进行的PIENU实验的操作、人员和数据分析。