title: Communication: theoretical study of ThO for the electron electric dipole moment search.
abstract: An experiment to search for the electron electric dipole moment (eEDM) on the metastable H(3)Δ1 state of ThO molecule was proposed and now prepared by the ACME Collaboration [http://www.electronedm.org]. To interpret the experiment in terms of eEDM and dimensionless constant kT, P characterizing the strength of the T,P-odd pseudoscalar-scalar electron-nucleus neutral current interaction, an accurate theoretical study of an effective electric field on electron, Eeff, and a parameter of the T,P-odd pseudoscalar-scalar interaction, WT, P, in ThO is required. We report our results for Eeff (84 GV/cm) and WT, P (116 kHz) together with the hyperfine structure constant, molecule frame dipole moment, and H(3)Δ1 → X(1)Σ(+) transition energy, which can serve as a measure of reliability of the obtained Eeff and WT, P values. Besides, our results include a parity assignment and evaluation of the electric-field dependence for the magnetic g factors in the Ω-doublets of H(3)Δ1.
authors: Federal State Budgetary Institute "Petersburg Nuclear Physics Institute," Gatchina, Leningrad district 188300, Russia.
authors: L V
authors: LV
authors: Skripnikov
authors: Federal State Budgetary Institute "Petersburg Nuclear Physics Institute," Gatchina, Leningrad district 188300, Russia.
authors: A N
authors: AN
authors: Petrov
authors: Federal State Budgetary Institute "Petersburg Nuclear Physics Institute," Gatchina, Leningrad district 188300, Russia.
authors: A V
authors: AV
authors: Titov