Effects of new nonlinear couplings in relativistic effective field theory - art. no. 024314

We extend the relativistic mean field theory model of Sugahara and Toki by adding new couplings suggested by modem effective field theories. An improv ed set of parameters is developed with the goal to test the ability of the models based on effective field theory to describe the properties of finite nuclei and, at the same time, to be consistent with the trends of Dirac-Br ueckner-Hartree-Fock calculations at densities away from the saturation reg ion. We compare our calculations with other relativistic nuclear force para meters for various nuclear phenomena.