A High Precision Measurement of Charge Symmetry Breaking in the N-N Interaction

N-N相互作用中电荷对称性破缺的高精度测量

• 批准号: 9722642
• 负责人: Allena Opper
• 金额: $ 28.34万
• 依托单位: Ohio University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-07-15 至 2001-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9722642&HistoricalAwards=false
• 关键词: Precision; Measurement; Charge; Symmetry; Breaking

This three-year grant will support a faculty member and two graduate students to continue and complete a high precision measurement of charge symmetry breaking in neutron-proton inelastic scattering at TRIUMF, byEmeasuring the small ( 1 per mil) forward-backward asymmetry in the produced deuteron center-of-mass distribution. It will also enable participation in an experiment at the LEGS facility at Brookhaven National Laboratory to carry out sum rule measurements of the spin-dependent Compton amplitude through measurements of the photodisintegration of the proton and neutron from pion threshold to 470 MeV, as well as related experiments in kaon electroproduction with the CLAS detector facility at the Thomas Jefferson National Accelerator Facility. Partial support will be provided by the MPS Office of Multidisciplinary Activities (OMA) as part of an enabling initiative in instrumentation development; this will help enable the CLAS effort. Ohio University is also providing support for equipment and partial support of a post-doctoral fellow to enable this work.

这个为期三年的补助金将支持一名教师和两名研究生继续并完成TRIUMF中子质子非弹性散射中电荷对称性破缺的高精度测量，通过测量产生的氘质心分布中的小（每密耳1）向前向后不对称性。 它还将使人们能够参与布鲁克海文国家实验室LEGS设施的一项实验，通过测量从π介子阈值到470兆电子伏的质子和中子的光致蜕变，对自旋相关康普顿振幅进行求和规则测量，并利用托马斯杰斐逊国家加速器设施的CLAS探测器设施进行k介子电产生的相关实验。 MPS多学科活动办公室（OMA）将提供部分支持，作为仪器开发的一项支持计划的一部分;这将有助于实现CLAS工作。 俄亥俄州大学还提供设备支持和博士后研究员的部分支持，以使这项工作。