Tensor Optimized Few-Body Model for s-Shell Nuclei

We propose a tensor-optimized few-body model (TOFM) in the few-body framework with bare nucleon-nucleon interaction. The physical concept of TOFM comes from a tensor-optimized shell-model (TOSM), which is applicable to the study of medium and heavy nuclei. The TOFM wave function describes the deuteron-like tensor correlation and provides a good reproduction of the binding energy with the bare nucleon-nucleon interaction. Using the spirit of the TOSM approximation, we show the performance of TOFM for s-shell nuclei. It is found that TOFM can account for the contribution of the tensor interaction very well and almost reproduces the total energy and various energy components as compared with rigorous few-body calculations. The relative correlation functions are also provided to improve the performance of TOSM for the study of heavier nuclei.