Realistic shell-model calculations for -shell nuclei including contributions of a chiral three-body force
- Complesso Univ. di Monte S. Angelo, Napoli (Italy)
- Peking Univ., Beijing (China)
- Complesso Univ. di Monte S. Angelo, Napoli (Italy); Univ. degli Studi della Campania “Luigi Vanvitelli,”, Caserta (Italy)
In this study we present an evolution of our derivation of the shell-model effective Hamiltonian, namely introducing effects of three-body contributions. More precisely, we consider a three-body potential at next-to-next-to-leading order in chiral perturbation theory, and the induced three-body forces that arise from many-body correlations among valence nucleons. The first one is included, in the derivation of the effective Hamiltonian for one- and two-valence nucleon-systems, at first order in the many-body perturbation theory. Namely, we include only the three-body interaction between one or two valence nucleons and those belonging to the core. For nuclei with more than two valence particles, both induced—turned on by the two-body potential—and genuine three-body forces come into play. Since it is difficult to perform shell-model calculations with three-body forces, these contributions are estimated for the ground-state energy only. To establish the reliability of our approximations, we focus attention on nuclei belonging to the p shell, aiming to benchmark our calculations against those performed with the ab initio no-core shell model. The obtained results are satisfactory, and pave the way to the application of our approach to nuclear systems with heavier masses.
- Research Organization:
- Texas A & M Univ., Commerce, TX (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); Natural Science Foundation of China
- Grant/Contract Number:
- SC0009971; 11320101004; 11575007
- OSTI ID:
- 1611277
- Alternate ID(s):
- OSTI ID: 1477569
- Journal Information:
- Physical Review. C, Vol. 98, Issue 4; ISSN 2469-9985
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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