Measurement of the H$^3\Delta_1$ Radiative Lifetime in ThO
| Autor: | Ang, Daniel G., Meisenhelder, Cole, Panda, Cristian D., Wu, Xing, DeMille, David, Doyle, John M., Gabrielse, Gerald |
|---|---|
| Rok vydání: | 2022 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.106.022808 |
| Popis: | The best limit on the electron electric dipole moment (eEDM) comes from the ACME II experiment [Nature \textbf{562} (2018), 355-360] which probes physics beyond the Standard Model at energy scales well above 1 TeV. ACME II measured the eEDM by monitoring electron spin precession in a cold beam of the metastable H$^3\Delta_1$ state of thorium monoxide (ThO) molecules, with an observation time $\tau \approx 1$ ms for each molecule. We report here a new measurement of the lifetime of the ThO (H$^3\Delta_1$) state, $\tau_H = 4.2\pm 0.5$ ms. Using an apparatus within which $\tau \approx \tau_H$ will enable a substantial reduction in uncertainty of an eEDM measurement. Comment: 6 pages, 5 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|