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arXiv 1004.2358nucl-thcond-mat.supr-connucl-ex
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手征三核子相互作用对核基态配对性质的最低阶贡献

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

T. Duguet, T. Lesinski, K. Hebeler, A. Schwenk

摘要:

我们进行了一个系统的研究的奇偶质量交错使用的配对相互作用计算在一阶低动量相互作用。建立在以前的工作,包括(核加库仑)两核子相互作用,我们在这里集中在一阶贡献的手征三核子力。我们观察到一个显着的排斥效应从三核子相互作用。来自两个和三个核子相互作用的组合贡献占实验配对间隙的大约70%。这为需要一致地计算的配对核和正常自能的高阶贡献留下了空间。

英文摘要:

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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