RGM study of the NN interaction in an extended quark model

Abstract

The extended quark model study of the NN interaction, in which the () excitations inherent in the quark-gluon interaction are explicitly incorporated into the model space, is completed with the inclusion of the () () excitations generated by RPA-type terms of the color Breit interaction. The new coupling kernels connecting the dominant (3q)-(3q) components of the NN system to the components lead to potentials with the characteristics of conventional [sigma] and [delta] meson exchange potentials and furnish the additional medium-range attraction needed to bind the deuteron. The full model is subjected to a quantitative test through a solution of the RGM equations in a coupled channel formalism. With one improvement of the model, to yield an N[pi] tensor force with OPEP strength and long-range characteristics, this model leads to a prediction of the low-energy NN scattering data and deuteron bound state characteristics which is in semiquantitative agreement with the experimental data and is free of parameter adjustments.