The Pion and Relativistic chiral mean field model for finite nuclei

The pion plays an important role in a nucleus. Until now, its effect was treated in terms of the Brueckner theory in nuclear matter through the G-matrix effective interaction. The difficulty of handling the pion exchange interaction in a finite nucleus is through the strong tensor interaction due to the pion exchange. The tensor optimized shell model (TOSM) together with the unitary correlation operator method (UCOM) was demonstrated to provide a quantitative account of tensor correlation in a finite nucleus. We discuss in this paper the recently developed relativistic chiral mean field model for finite nuclei by taking the concept of TOSM and UCOM.