SHELL-MODEL CALCULATIONS WITH LOW-MOMENTUM NUCLEON-NUCLEON INTERACTIONS BASED UPON CHIRAL PERTURBATION THEORY

摘要

Recently a new low-momentum nucleon-nucleon potential (N~3LOW) has been derived from chiral perturbation theory at next-to-next-to-next-to-leading order with a sharp low-momentum cutoff at 2.1 fm~(-1). In this work we compare its perturbative properties with those of a V_(low-k) potential constructed from a realistic NN potential with high-momentum components. We have performed shell-model calculations for ~(18)O using effective hamiltonians derived from both types of low-momentum potential. The results show that the N~3LOW potentiat is suitable to be applied perturbatively in microscopic nuclear structure calculations yielding results quite close to those obtained from V_(low_k).