Search for the electron electric dipole moment

这个实验研究计划是一个正在进行的非零电子电偶极矩（EDM）的搜索的延续，使用亚稳态a（1）[三重态sigma +]状态的氧化铅。 a（1）态将通过从基态的直接激光诱导跃迁被激发，并且与EDM相关的线性斯塔克位移将使用来自分子的高密度蒸气室的荧光中的量子拍来测量。 对非零电子EDM的观测将为粒子物理学标准模型之外的现象提供明确的证据。 目前流行的超对称理论通常预测电子EDM在电流极限的几个数量级内，这是由这个实验设定的。 在EDM搜索的同时，将开发进一步扩展该方法灵敏度的技术。 该计划的更广泛的影响是广泛的学生培训以及与小型大学教师的合作。

This experimental research program is a continuation of an ongoing search for a non-zero electron electric dipole moment (EDM), using the metastable a(1)[triplet sigma plus] state of lead oxide. The a(1) state will be excited with a direct laser-induced transition from the ground state, and the linear Stark shift associated with the EDM will be measured using quantum beats in fluorescence from a high-density vapor cell of the molecule. Observation of a non-zero electron EDM would provide definitive evidence for phenomena beyond the Standard Model of particle physics. Currently favored theories involving supersymmetry typically predict an electron EDM within a few orders of magnitude of the current limit, which was set by this experiment. In parallel with the EDM search, techniques for further extending the sensitivity of the method will be developed. The broader impact of the program is extensive student training as well as collaborations with small college faculty.