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Title: Enhancement factors of parity- and time-reversal-violating effects for monofluorides
Authors: Sunaga, A
Srinivasa Prasannaa, V
Abe, M
Hada, M
Das, B. P
Issue Date: Oct-2018
Publisher: The American Physical Society
Citation: Physical Review A, Vol. 98, No. 4, 042511
Abstract: Heavy polar diatomic molecules are currently one of the leading candidates for probing physics beyond the standard model via studies of time-reversal (T) and parity (P) violations. In this paper, we analyze the effective electric field (Eeff) that is required for determining the electron electric dipole moment (eEDM), and the scalar-pseudoscalar (S-PS) interaction coefficient (Ws), in group-12 and group-2 systems. We use a relativistic coupled cluster method for our calculations, and find that group-12 monofluorides have large Eeff and Ws (for example, the values of Eeff and Ws of CnF, the heaviest group-12 fluoride, are 662 GV/cm and 3360 kHz, respectively). The reason for this is the contraction of the valence s and p orbitals due to the weak screening effect of the outermost core's d electron. The calculations of Eeff and Ws show that their ratio, Ws/Eeff, increases with Z. Based on these results, as well as experimental suitability, we propose SrF and CdF as candidate molecules for experiment.
Description: Open Access
ISSN: 1050-2947
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Appears in Collections:IIAP Publications

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