| Irfu-10-54
|
|---|
| Lowest-order contributions of chiral three-nucleon interactions to pairing properties of nuclear ground states |
| T. Duguet, T. Lesinski, K. Hebeler, A. Schwenk |
| We perform a systematic study of the odd-even mass staggering
generated using a pairing interaction computed at first order
in low-momentum interactions. Building on previous work including
the (nuclear plus Coulomb) two-nucleon interaction only, we focus
here on the first-order contribution from chiral three-nucleon
forces. We observe a significant repulsive effect from the
three-nucleon interaction. The combined contribution from two- and
three-nucleon interactions accounts for approximately 70% of the
experimental pairing gaps. This leaves room for higher-order
contributions to the pairing kernel and the normal self-energy that
need to be computed consistently. |
