$Ab Initio$ calculations of medium-mass nuclei with explicit chiral $3N$ interactions - INSPIRE

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$Ab Initio$ calculations of medium-mass nuclei with explicit chiral $3N$ interactions

Nov, 2012

6 pages

Published in:

Phys.Rev.C 87 (2013) 2, 021303

Published: Feb 21, 2013

e-Print:

1211.4748 [nucl-th]

DOI:

10.1103/PhysRevC.87.021303

View in:

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Abstract: (APS)

We present the first ab initio coupled-cluster calculations of medium-mass nuclei with explicit chiral three-nucleon (3N) interactions. Using a spherical formulation of coupled cluster with singles and doubles excitations including explicit 3N contributions, we study ground states of 16,24O, 40,48Ca, and 56Ni. We employ chiral nucleon-nucleon (NN) plus 3N interactions softened through a similarity renormalization group (SRG) transformation at the three-body level. We investigate the impact of all truncations and quantify the resulting uncertainties—this includes the contributions from triple excitations, the truncation of the set of three-body matrix elements, and the omission of SRG-induced four-body interactions. Furthermore, we assess the quality of a normal-ordering approximation of the 3N interaction beyond light nuclei. Our study points towards the predictive power of chiral Hamiltonians in the medium-mass regime.

Note:

6 pages, 3 figures, 2 tables

21.60.De
21.30.-x
21.45.Ff
05.10.Cc

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Figures(4)

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