Atomic parity violation in highly charged Ca 40 , 48 and Pb 208 ions

We calculate parity-violation-induced E 1 amplitudes for the 1 s → 2 s and 1 s 2 2 s → 1 s 2 3 s transitions in H- and Li-like ions of Ca 40 , Ca 48 , and Pb 208 . In our analysis, we account for neutron skin effects and nuclear uncertainties for each nucleus. We consider the spin-independent weak-interaction contribution of the Z 0 boson described by the standard model, as well as the effects of a hypothetical new Z ′ boson of varying mass. We conclude that the neutron-skin corrections in the Ca 40 , 48 isotope pair can mostly be neglected when considering Z ′ boson effects, which is an advantage for the search for new parity-violating physics. However, both the neutron skin effect and the sensitivity to hypothetical Z ′ interactions in Pb 208 are shown to be significant.