Reappraisal of P, T-odd parameters from the improved calculation of electric dipole moment of 225Ra atom

By employing the recently developed relativistic normal coupled-cluster theory, we obtained the electric dipole moment (EDM) of 225Ra due to nuclear Schiff moment (NSM) and tensor-pseudotensor (T-PT) electron-nucleus (e-N) interaction as-6.3(5) × 10-17 S |e| cm/(|e| fm3) and-13(1) × 10-20 C Tσ N |e| cm, respectively, for the NSM S, T-PT coupling coefficient CT and nuclear Pauli spinor σ N. This is corroborated by analyzing the dipole polarizability value of 225Ra, which is obtained as 257(8) Our EDM results, in combination with the measurement (2015 Phys. Rev. Lett. 114 233002), are about 8% and 28% improvements over the limits that were reported using the relativistic coupled-cluster theory for the NSM and T-PT e-N coupling coefficient, respectively. Further combining with the nuclear calculations, we infer limits on the EDM of neutron d n < 1.15 × 10-23 |e| cm, the EDM of proton d p < 1.1 × 10-22 cm, the quantum chromodynamics parameter Though these bounds are not competitive at present with the current-best limits acquired from 199Hg atom, they can be bettered when the measurement of EDM in 225Ra improves by four orders.