Low Energy Nuclear Physics Using The Princeton Cyclotron, Lasers, and Ultra Cold Neutrons

*9807133Cates中子β衰变提供了有关核子带电弱电流形状因子的基本数据。该项目的目标是利用超冷中子(UCN)最终在已知β不对称性的精度方面提供至少数量级的改进。当这种测量与改进中子寿命测量的持续努力相结合时(也通过使用UCN)，可以改进弱轴向形状因数和上下CKM矩阵元素的值，并为标准模型的扩展提供灵敏的测试。这项实验将在洛斯阿拉莫斯国家实验室进行，但将广泛利用普林斯顿大学现有的资源，用于探测器开发、数据采集和数据分析。

***9807133CatesNeutron beta-decay provides fundamental data on the charged weak current form factors of the nucleon. The goal of this project is to make use of ultracold neutrons (UCN's) to ultimately provide at least and order of magnitude improvement in the precision to which the beta-asymmetry is known. Such a measurement, when coupled with the ongoing effort to improve measurements of the neutron lifetime (also through the use of UCN's), provides improved values for the weak axial form factor and the up-down CKM matrix element, as well as providing a sensitive test for extensions to the standard model. The experiment will take place at Los Alamos National Laboratory, but will make extensive use of the resources available at Princeton for detector development, data acquisition, and data analysis.***