Nuclear saturation in lowest-order Brueckner theory with two- and three-nucleon forces in view of chiral effective field theory
Nuclear saturation in lowest-order Brueckner theory with two- and three-nucleon forces in view of chiral effective field theory
复制标题
DOI：
10.1093/ptep/ptv166
复制
发表时间：
2015-10
影响因子：
3.5
通讯作者：
M. Kohno
中科院分区：
文献类型：
--
作者：
M. Kohno
在手征有效场论（Ch-EFT）中，利用最低阶Brueckner理论框架，从双核子和三核子相互作用的角度讨论了核饱和机制.本文用现代核子-核子（NN）势及其低动量等效相互作用重新讨论了在计算各种NN力的饱和点时所观察到的Coester带，并详细地讨论了Ch-EFT相互作用的饱和曲线。通过折叠第三核子自由度，将三核子力（3 NF）简化为有效的两体相互作用。讨论了由于选择3 NF低能常数c_D和c_E而引起的不确定性。NN势的截止能量依赖性的降低通过证明3 NF在$^1$S$_0$和$^3$S$_1$状态中的作用来解释。
The nuclear saturation mechanism is discussed in terms of two-nucleon and three-nucleon interactions in chiral effective field theory (Ch-EFT), using the framework of lowest-order Brueckner theory. After the Coester band, which is observed in calculating saturation points with various nucleon-nucleon (NN) forces, is revisited using modern NN potentials and their low-momentum equivalent interactions, detailed account of the saturation curve of the Ch-EFT interaction is presented. The three-nucleon force (3NF) is treated by reducing it to an effective two-body interaction by folding the third nucleon degrees of freedom. Uncertainties due to the choice of the 3NF low-energy constants $c_D$ and $c_E$ are discussed. The reduction of the cutoff-energy dependence of the NN potential is explained by demonstrating the effect of the 3NF in the $^1$S$_0$ and $^3$S$_1$ states.