Three-Body Forces and Proton-Rich Nuclei...

We present the first study of three-nucleon (3N) forces for proton-rich nuclei along the N ¼ 8 and
N ¼ 20 isotones. Our results for the ground-state energies and proton separation energies are in very good
agreement with experiment where available, and with the empirical isobaric multiplet mass equation. We
predict the spectra for all N ¼ 8 and N ¼ 20 isotones to the proton dripline, which agree well with
experiment for 18Ne, 19Na, 20Mg and 42Ti. In all other cases, we provide first predictions based on nuclear
forces. Our results are also very promising for studying isospin symmetry breaking in medium-mass
nuclei based on chiral effective field theory.