Leading order relativistic chiral nucleon-nucleon interaction
Leading order relativistic chiral nucleon-nucleon interaction
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前导相对论手性核子-核子相互作用
DOI：
10.1088/1674-1137/42/1/014103
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发表时间：
2018
影响因子：
3.6
通讯作者：
Jie Meng
中科院分区：
文献类型：
--
作者：
Xiu-Lei Ren;Kai-Wei Li;Li-Sheng Geng;Bingwei Long;Peter Ring;Jie Meng
受相对论理论在原子/分子和核系统研究中的成功以及相对论核结构研究中对相对论手性力的需求的启发，我们探索了一种新的相对论方案，在协变手性有效场理论的框架下构建核子-核子相互作用。手性相互作用被公式化为具有协变功率计数和洛伦兹不变手性拉格朗日的前导阶。我们发现相对论方案引入了描述核力所需的所有六个自旋算子。对部分波势的详细研究表明，与前导温伯格方法相比，对 S 0 1 和 P 0 3 相移的描述更好，并且与次前导温伯格方法类似。对于角动量 J ⩾ 1 的其他部分波，相对论结果几乎与它们的前阶非相对论结果相同。
Motivated by the successes of relativistic theories in studies of atomic/molecular and nuclear systems and the need for a relativistic chiral force in relativistic nuclear structure studies, we explore a new relativistic scheme to construct the nucleon-nucleon interaction in the framework of covariant chiral effective field theory. The chiral interaction is formulated up to leading order with covariant power counting and a Lorentz invariant chiral Lagrangian. We find that the relativistic scheme induces all six spin operators needed to describe the nuclear force. A detailed investigation of the partial wave potentials shows a better description of the S 0 1 and P 0 3 phase shifts than the leading order Weinberg approach, and similar to that of the next-to-leading order Weinberg approach. For the other partial waves with angular momenta J ⩾ 1 , the relativistic results are almost the same as their leading order non-relativistic counterparts.