Journal
PHYSICAL REVIEW C
Volume 87, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.87.021303
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Funding
- Office of Science of the US Department of Energy [DE-AC02-05CH11231]
- Deutsche Forschungsgemeinschaft [SFB 634]
- Helmholtz International Center for FAIR within the LOEWE program of the State of Hesse
- BMBF [06DA9040I, 06DA7047I]
- Natural Sciences and Engineering Research Council of Canada (NSERC) [401945-2011]
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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 O-16,O-24, Ca-40,Ca-48, and Ni-56. 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. DOI: 10.1103/PhysRevC.87.021303
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