In summary, the isospin- and angular-momentum-projected DFT theory has been employed to calculate isospin mixing and isospin-breaking corrections to the Fermi superallowed -decay. Our parameter-free model capitalizes on the ability of the MF approach to describe long-range polarization effects. The self-consistent HF wave functions containing essential correlations due to the symmetry-breaking mechanism are then used as trial states during the projection procedure. The results for in Zr are consistent with current experimental estimates from the giant dipole resonance studies. The preliminary results on the -corrections are also very encouraging. The calculated values of the nucleus-independent and the are consistent with the recent evaluations of Ref. .
This work was supported in part by the Polish Ministry of Science under Contracts numbers N N202 328234 and N N202 239037, Academy of Finland and University of Jyväskylä within the FIDIPRO programme, and by the Office of Nuclear Physics, U.S. Department of Energy under Contract Nos. DE-FG02-96ER40963 (University of Tennessee) and DE-FC02-09ER41583 (UNEDF SciDAC Collaboration). We acknowledge the CSC - IT Center for Science Ltd, Finland for the allocation of computational resources.