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 $H^3{\Delta }_1$ state of ThO molecule was proposed and now in the final stage of preparation by the ACME collaboration [http://www.electronedm.org]. To interpret the experiment in terms of \eEDM\ and dimensionless constant $k_{T,P}$ characterizing the strength of the scalar T,P-odd electron-nucleus neutral current interaction, an accurate theoretical study of effective electric field on electron, Eeff, and $W_{T,P}$ constants is required. We report calculation of \Eeff\ (84 GV/cm) and a parameter of T,P-odd scalar neutral currents interaction, $W_{T,P}$ (116 kHz), together with the hyperfine structure constant, molecule frame dipole moment and $H^3{\Delta }_1\to X^1{\Sigma }^{+}$ transition energy, which can serve as a measure of reliability of the obtained \Eeff\ and $W_{T,P}$ values. Besides, our results include a parity assignment and evaluation of the electric-field dependence for the magnetic $g$ factors for the $\Omega$-doublets of $H^3{\Delta }_1$.

References in corpus (5)

• Prospects for an electron electric dipole moment search in metastable ThO and ThF${}^{+}$
• Broadband velocity modulation spectroscopy of HfF^+: towards a measurement of the electron electric dipole moment
• Magnetic dipole and electric quadrupole moments of the 229Th nucleus
• Centrifugal correction to hyperfine structure constants in the ground state of lead monofluoride, PbF
• Theoretical study of the parity and time reversal violating interaction in solids

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