| Irfu-16-02
|
|---|
| Radii and binding energies in oxygen: a puzzle for nuclear forces |
| V. Lapoux, V. Somà, C. Barbieri, H. Hergert, J. D. Holt, and S. R. Stroberg |
| We present a systematic study of both nuclear radii and binding energies in (even) oxygen isotopes from the valley of stability to the neutron drip line. A thorough analysis of the available experimental information of oxygen radii is carried out and is compared to state-of-the-art ab initio calculations
along with binding energy systematics. We show that, in spite of a good reproduction of the latter, ab initio calculations with conventional inter-nucleon potentials derived within chiral effective field theory fail to provide a realistic description of charge and matter radii. A novel unconventional version of two- and three-nucleon forces leads to considerable improvement of the simultaneous description of the three observables for stable isotopes, but shows deficiencies for the most neutron-rich systems. Thus, crucial challenges related to the development of nuclear interactions remain. |
