Chiral symmetry and three nucleon forces
Chiral symmetry and three nucleon forces
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手性对称性和三个核子力
DOI：
10.1103/physrevc.59.53
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发表时间：
1998
影响因子：
3.1
通讯作者：
U. V. Kolck
中科院分区：
文献类型：
--
作者：
J. Friar;D. Huber;U. V. Kolck
在简要回顾了三核子力在少核子体系中的作用后，讨论了手征微扰论对这些力的研究。建设的（名义）领导和subleading阶玻恩项和π-rescattering图有助于两π交换三核子力的审查，并比较了今天使用的这种力量的类型。结果表明，Tucson-Melbourne力的短程项在功率计算中是不自然的，应该去掉。这样，两π交换三核子力的类别就变得相当一致了。{版权} {美国物理学会}
After a brief review of the role three-nucleon forces play in the few-nucleon systems, the chiral-perturbation-theory approach to these forces is discussed. Construction of the (nominal) leading- and subleading-order Born terms and pion-rescattering graphs contributing to two-pion-exchange three-nucleon forces is reviewed, and comparisons are made of the types of such forces that are used today. It is demonstrated that the short-range {ital c} term of the Tucson-Melbourne force is unnatural in terms of power counting and should be dropped. The class of two-pion-exchange three-nucleon forces then becomes rather uniform. {copyright} {ital 1999} {ital The American Physical Society}