Isospin symmetry-breaking corrections for superallowed beta decay in relativistic RPA approaches

The isospin symmetry-breaking corrections delta(c) obtained with the self-consistent relativistic RPA approaches are presented. It is shown that the proper treatment of the Coulomb mean field is very important for extracting these corrections. The nucleus-independent Ft value, the V(ud) matrix element and the unitarity of the Cabibbo-Kobayashi-Maskawa matrix are discussed. The effects of neutron-proton mass difference on the isospin symmetry-breaking corrections are also investigated.Physics, NuclearEICPCI-S(ISTP)