Theoretical study on parity-violating electron scattering off isotonic nuclei

The parity-violating electron scattering off isotonic nuclei has been investigated in various nuclear models by the partial wave method. The sensitivities image of image to neutron radius image and statistical errors image of isotonic nuclei in PVS experiments are studied. The parity-violating asymmetries image of isotonic nuclei are calculated with a large sample of nuclear mean field models and presented as a function of neutron skin thickness image. It can be observed that there is high linear dependence between image and neutron skin thickness image. By comparing the linear fit formula of image and image of isotonic nuclei, we can deduce the neutron RMS radius of isotonic nuclei and study the influences of protons on neutron density distributions.