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Ab initio calculations, 20 ≤ A ≤ 38, 39 ≤ A ≤ 58, 6 ≤ A ≤ 19, A ≤ 5, Binding energy & masses, Breakup reactions, Elastic scattering reactions, Energy levels, Few-body systems, Nuclear radii, Nucleon-nucleon interactions
MPINP:
Starke Wechselwirkung und exotische Kerne – Abteilung Blaum
Abstract:
We present a comprehensive investigation of few-nucleon systems as well as light and medium-mass nuclei up to A=48 using the current Low Energy Nuclear Physics International Collaboration two-nucleon interactions in combination with the third-order (N2LO) three-nucleon forces. To address the systematic overbinding of nuclei starting from A≈10 found in our earlier study utilizing the N2LO two- and three-nucleon forces, we take into account higher-order corrections to the two-nucleon potentials up through fifth order in chiral effective field theory. The resulting Hamiltonian can be completely determined using the A=3 binding energies and selected nucleon-deuteron cross sections as input. It is then shown to predict other nucleon-deuteron scattering observables and spectra of light p-shell nuclei, for which a detailed correlated truncation error analysis is performed, in agreement with experimental data. Moreover, the predicted ground state energies of nuclei in the oxygen isotopic chain from 14O to 26O as well as 40Ca and 48Ca show a remarkably good agreement with experimental values, given that the Hamiltonian is fixed completely from the A≤3 data, once the fourth-order (N3LO) corrections to the two-nucleon interactions are taken into account. On the other hand, the charge radii are found to be underpredicted by ≈10% for the oxygen isotopes and by almost 20% for 40Ca and 48Ca.
