Current status of neutron electric dipole moment experiments

Abstract

New precise measurements of the neutron electric dipole moment (nEDM) are strongly motivated by the tight constraints they will place on new sources of CP violation. A number of experiments are commencing in the next few years that aim to reduce the experimental uncertainty on the nEDM by more than an order of magnitude. The experiments pursue a variety of complementary techniques. The TUCAN (TRIUMF Ultra-Cold Advanced Neutron) EDM experiment is one such experiment which combines a spallation-driven superthermal He-II source of ultracold neutrons with a room-temperature nEDM spectrometer.