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arXiv · 1911.04955

Family of Chiral Two- plus Three-Nucleon Interactions for Accurate Nuclear Structure Studies

Thomas Hüther·Klaus Vobig·Kai Hebeler·Ruprecht Machleidt·Robert Roth
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Abstract

We present a family of nucleon-nucleon (NN) plus three-nucleon (3N) interactions up to N3LO in the chiral expansion that provides an accurate ab initio description of ground-state energies and charge radii up to the medium-mass regime with quantified theory uncertainties. Starting from the NN interactions proposed by Entem, Machleidt and Nosyk, we construct 3N interactions with consistent chiral order, non-local regulator, and cutoff value and explore the dependence of nuclear observables over a range of mass numbers on the 3N low-energy constants. By fixing these constants using the 3-H and 16-O ground-state energies, we obtain interactions that robustly reproduce experimental energies and radii for large range from p-shell nuclei to the nickel isotopic chain and resolve many of the deficiencies of previous interactions. Based on the order-by-order convergence and the cutoff dependence of nuclear observables, we assess the uncertainties due the interaction, which yield a significant contribution to the total theory uncertainty.

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Thomas Hüther, Klaus Vobig, Kai Hebeler, Ruprecht Machleidt, Robert Roth. 2019-11-12. Family of Chiral Two- plus Three-Nucleon Interactions for Accurate Nuclear Structure Studies. https://doi.org/10.1016/j.physletb.2020.135651

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