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

这项为期三年的资助将支持一名教员和两名研究生继续并完成在TRIUMF中子-质子非弹性散射中电荷对称性破缺的高精度测量，通过测量产生的氘核质量中心分布中的小（1 / mil）前后不对称性。它还将使布鲁克海文国家实验室的LEGS设施能够参与一项实验，通过测量质子和中子从介子阈值到470 MeV的光衰变来进行自旋依赖的康普顿振幅的和规则测量，以及在托马斯杰斐逊国家加速器设施的CLAS探测器设施进行kaon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，作为仪器开发的支持倡议的一部分；这将有助于CLAS工作的实现。俄亥俄大学也为这项工作提供设备支持和博士后研究员的部分支持。

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.