%0 Journal Article
%T Isovector proton-neutron pairing and Wigner energy in Hartree-Fock mean field calculations
%A D. Negrea
%A N. Sandulescu
%J Physics
%D 2014
%I arXiv
%R 10.1103/PhysRevC.90.024322
%X We propose a new approach for the treatment of isovector pairing in self-consistent mean field calculations which conserves exactly the isospin and the particle number in the pairing channel. The mean field is generated by a Skyrme-HF functional while the isovector pairing correlations are described in terms of quartets formed by two neutrons and two protons coupled to the total isospin T=0. In this framework we analyse the contribution of isovector pairing to the symmetry and Wigner energies. It is shown that the isovector pairing provides a good description of the Wigner energy, which is not the case for the mean field calculations in which the isovector pairing is treated by BCS-like models.
%U http://arxiv.org/abs/1404.5226v1