Search for Parity Nonconservation in Atomic Ytterbium

本项目的重点是高精度测量镱原子中与核自旋无关和与核自旋相关的宇称非守恒效应。 虽然这些测量基于经过验证的实验技术，但与早期的工作相比，它们代表了一种完全不同的方法，因为它们使用具有异常大的PNC效应的原子，并且不依赖于高度精确的原子计算。核自旋无关效应将对我们理解半轻子电弱相互作用产生重要影响，而核自旋相关效应将提供有关核内强子电弱相互作用的重要信息。

This project focuses on the high-precision measurement of both the nuclear spin-independent and the nuclear spin-dependent parity-nonconserving (PNC) effects in atomic ytterbium (Yb). While based on proven experimental techniques, these measurements represent a radically different approach compared to earlier work in that they use an atom with an unusually large PNC effect and do not rely on highly accurate atomic calculations. The nuclear spin-independent effect will have a significant impact on our understanding of the semi-leptonic electroweak interactions, while the nuclear spin-dependent effect will provide important information concerning the hadronic electroweak interactions within the nucleus.