Isospin Corrections for Superallowed β‐Decay in Self‐consistent Relativistic RPA Approach

Self‐consistent random phase approximation based on relativistic Hartree‐Fock approach is applied to calculate the isospin symmetry‐breaking corrections $δc$ for the nuclear $0+→0+$ superallowed transitions. The nucleus‐independent Ft values and the unitarity of the Cabibbo‐Kobayashi‐Maskawa matrix are then discussed.