Quasiparticle interaction in nuclear matter and the importance of contributions from low momentum states

Abstract

A microscopic calculation of the quasiparticle interaction in nuclear matter is detailed. In order to take special care of the contributions from the low momentum states, a model space is introduced. Excluded from the model space, the high momentum states are absorbed into the model interaction. Brueckner-Bethe theory suggests the choice of a truncated G matrix as a good approximation for this model interaction. A simple perturbative approach is attempted within the model space. The calculated quasiparticle interaction is consistent with experimental results. (AIP)