Tensor Optimized Few-body Model for Light Nuclei

The tensor interaction plays an important role to determine the nuclear structure. In this study, we propose a tensor-optimized few-body model (TOFM) in the few body framework with bare nucleon-nucleon interaction. In TOFM, the configurations caused by the one-operation of the tensor operator to the S-wave ground state are introduced in the total wave function. It is shown that TOFM reproduces more than 90 % of the total binding energy and the tensor correlation of the few-body results for s-shell nuclei. We further apply TOFM to the p-shell, as He-5. We work out the variational calculation for He-5 and discuss the structure difference between two resonance states 3/2(-) and 1/2(-). In particular, we shed light on the roles of the tensor interaction in two states, such as the LS splitting energy.