Electric dipole moment of ^{129}Xe atom

Abstract

The parity (P) and time-reversal (T) odd coupling constant associated with the tensor-pseudotensor (T-PT) electron-nucleus interaction and the nuclear Schiff moment (NSM) have been determined by combining the result of the measurement of the electric dipole moment (EDM) of ^{129}Xe atom and calculations based on the relativistic coupled-cluster (RCC) theory. Calculations using various relativistic many-body methods have been performed at different levels of approximation and their accuracies are estimated by comparing the results of the calculated dipole polarizability of the ground state of the above atom with its most precise available experimental data. The non-linear terms that arise in the RCC theory at the singles and doubles approximation were found to be crucial for achieving high accuracy in the calculations. Our results for the ^{129}Xe EDM due to the odd T-PT interaction and the NSM are, respectively, d_A=0.501 x 10^{-20} C_T <\sigma_N > |e|cm and d_A=0.336 x 10^{-17} S/(|e| fm^3) |e|cm. These results in combination with the future EDM measurements in atomic Xe could provide the most accurate limits for the T-PT coupling constant and NSM.