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

* 9807133中子β衰变提供了关于核子带电弱电流形状因子的基本数据。 这个项目的目标是利用超冷中子（UCN），最终提供至少和数量级的改善，β-不对称性是已知的精度。 这样的测量，当与正在进行的努力，以改善测量的中子寿命（也通过使用UCN的），提供了改进的值的弱轴向形状因子和上下CKM矩阵元素，以及提供了一个敏感的测试扩展到标准模型。 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的资源进行探测器开发，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.***