2014/01/31 by Timo Fleig, Malaya K. Nayak
Physics and Astronomy · #physics.atom-ph #quant-ph
paper · pdf · doi:10.1016/j.jms.2014.03.017
7 pages, 1 figure new layout; replaced "confidence" with "error bar"; Paper has been accepted by Journal of Molecular Spectroscopy. Please refer to that (modified) version as reference
arxiv created 2014/03/28 · arxiv updated 2014/04/02
A recently implemented relativistic four-component configuration interaction approach to study \calP- and \calT-odd interaction constants in atoms and molecules is employed to determine the electron electric dipole moment effective electric field in the Ω=1 first excited state of the ThO molecule. We obtain a value of Eeff = 75.6 [(\rm GV)/(\rm cm)] with an estimated error bar of 3% and 10% smaller than a previously reported result [arXiv:1308.0414 [physics.atom-ph]]. Using the same wavefunction model we obtain an excitation energy of TvΩ=1 = 5329 [\cm], in accord with the experimental value within 2%. In addition, we report the implementation of the magnetic hyperfine interaction constant A|| as an expectation value, resulting in A|| = -1335 [MHz] for the Ω=1 state in ThO. The smaller effective electric field increases the previously measured upper bound to the electron electric dipole moment interaction constant [arXiv:1310.7534v2 [physics.atom-ph]] and thus mildly mitigates constraints to possible extensions of the Standard Model of particle physics.