Study of the ground-state energy of 40Ca with the CD-Bonn nucleon-nucleon potential

Details Study of the ground-state energy of 40Ca with the CD-Bonn nucleon-nucleon potential Study of the ground-state energy of 40Ca with the CD-Bonn nucleon-nucleon potential

2006-12-04

arxiv.org/abs/nucl-th/0612012v3

Phys.Rev.C75:057303,2007

Physics

Nuclear Physics

Nuclear Theory

4 pages, 1 figure, 1 table, to be published in Physical Review C

Scientific paper

10.1103/PhysRevC.75.057303

We have calculated the ground-state energy of the doubly-magic nucleus 40Ca within the framework of the Goldstone expansion using the CD-Bonn nucleon-nucleon potential. The short-range repulsion of this potential has been renormalized by integrating out its high-momentum components so as to derive a low-momentum potential V-low-k defined up to a cutoff momentum Lambda. A simple criterion has been employed to establish a connection between this cutoff momentum and the size of the two-nucleon model space in the harmonic oscillator basis. This model-space truncation approach provides a reliable way to renormalize the free nucleon-nucleon potential preserving its many-body physics. The role of the 3p-3h and 4p-4h excitations in the description of the ground state of 40Ca is discussed.

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