Lowest-order contributions of chiral three-nucleon interactions to pairing properties of nuclear ground states

Details Lowest-order contributions of chiral three-nucleon interactions to pairing properties of nuclear ground states Lowest-order contributions of chiral three-nucleon interactions to pairing properties of nuclear ground states

2010-04-14

arxiv.org/abs/1004.2358v1

Physics

Nuclear Physics

Nuclear Theory

4 pages, 2 figures. Proceedings of the International Niigata 2010 Symposium on Forefronts of Researches in Exotic Nuclear Stru

Scientific paper

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.

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