Journal
PHYSICAL REVIEW C
Volume 70, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.70.061002
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The low-momentum nucleon-nucleon interaction V-low k is applied to three- and four-nucleon systems. We investigate the H-3, He-3, and He-4 binding energies for a wide range of the momentum cutoffs. By construction, all low-energy two-body observables are cutoff independent, and therefore, any cutoff dependence is due to missing three-body or higher-body forces. We argue that for reasonable cutoffs V-low k is similar to high-order interactions derived from chiral effective field theory. This motivates augmenting V-low k by corresponding three-nucleon forces. The set of low-momentum two- and three-nucleon forces can be used in calculations of nuclear structure and reactions. We find that three-nucleon force contributions are perturbative for small cutoffs.
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