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Similarity-Transformed Chiral NN+3N Interactions for the Ab Initio Description of 12-C and 16-O

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arxiv 1105.3173 v1 pith:RRMXRAPL submitted 2011-05-16 nucl-th

Robert Roth , Joachim Langhammer , Angelo Calci , Sven Binder , Petr Navrátil This is my paper · ORCID
classification nucl-th
keywords interactionschiralmodelncsmcontributionsincludinginducedinitio
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We present first ab initio no-core shell model (NCSM) calculations using similarity renormalization group (SRG) transformed chiral two-nucleon (NN) plus three-nucleon (3N) interactions for nuclei throughout the p-shell, particularly 12-C and 16-O. By introducing an adaptive importance truncation for the NCSM model space and an efficient JT-coupling scheme for the 3N matrix elements, we are able to surpass previous NCSM studies including 3N interactions regarding, both, particle number and model-space size. We present ground and excited states in 12-C and 16-O for model spaces up to N_max=12 including full 3N interactions, which is sufficient to obtain converged results for soft SRG-transformed interactions. We analyze the contributions of induced and initial 3N interactions and probe induced 4N terms through the sensitivity of the energies on the SRG flow parameter. Unlike for light p-shell nuclei, SRG-induced 4N contributions originating from the long-range two-pion terms of the chiral 3N interaction are sizable in 12-C and 16-O.

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Cited by 2 Pith papers

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  1. Systematic study of large-momentum distribution in nuclei with the operator product expansion

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    Using OPE matched to Pionless EFT, the authors reproduce the deuteron's high-momentum nucleon distribution from scattering-state inputs, validating the method against the AV18 potential.

  2. Relativistic chiral nuclear forces: status and prospects

    nucl-th 2025-01 conditional novelty 2.0 of 10

    A review of the relativistic chiral nuclear force, presenting the Beihang group's own NNLO results for nucleon-nucleon scattering and promising faster convergence than the standard Weinberg approach.

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