2014/05/06 by P. Maris, Pieter Maris, J. P. Vary +9 · 4 citations
Physics and Astronomy · #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.1103/physrevc.90.014314
published as Phys. Rev. C 90, 014314 (2014) · 11 pages, 9 figures
arxiv created 2014/05/06 · openalex publication_date 2014/07/18 · arxiv updated 2014/07/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We investigate selected static and transition properties of 12C using ab initio no-core shell model (NCSM) methods with chiral two- and three-nucleon interactions. We adopt the similarity renormalization group (SRG) to assist convergence including up to three-nucleon (3N) contributions. We examine the dependencies of the 12C observables on the SRG evolution scale and on the model-space parameters. We obtain nearly converged low-lying excitation spectra. We compare results of the full NCSM with the importance truncated NCSM in large model spaces for benchmarking purposes. We highlight the effects of the chiral 3N interaction on several spectroscopic observables. The agreement of some observables with experiment is improved significantly by the inclusion of 3N interactions, e.g., the B(M1) from the first J^\ensuremathπT=1+1 state to the ground state. However, in some cases the agreement deteriorates, e.g., for the excitation energy of the first 1+0 state, leaving room for improved next-generation chiral Hamiltonians.