Nuclear T-violation search using ions in a crystal

Physics beyond the Standard Model is expected to generate new particles or interactions that can lead to time-reversal (T) symmetry violation in nuclei. I will discuss how polarized atomic ions trapped in crystals can be used to amplify and sense the minuscule effects of beyond-Standard-Model T-violation. Ions in crystals also offer practical advantages for precision experiments, such as accurate built-in comagnetometers to control systematic errors. I will present results from a search for T-violation using ¹⁵³Eu³⁺ ions in a crystal.