Ground state correlations in O-16 and Ca-40 - art. no. 044302

We study the ground state properties of doubly closed shell nuclei O-16 and Ca-40 in the framework of correlated basis function theory using state dep endent correlations, with central and tensor components. The realistic Argo nne v(14) and v(8)' two-nucleon potentials and three-nucleon potentials of the Urbane class have been adopted. By means of the Fermi hypernetted chain integral equations, in conjunction with the single operator chain approxim ation, we evaluate the ground state energy, one- and two-body densities and electromagnetic, and spin static responses for both nuclei. In O-16 We com pare our results with the available Monte Carlo and coupled cluster ones an d find a satisfying agreement. As in the nuclear matter case with similar i nteractions and wave functions. the nuclei result underbound by 2-3 MeV/nuc leon.