论文标题
同胞质量的质量差异
Isospin mass differences of singly heavy baryons
论文作者
论文摘要
我们基于Pion平均场方法研究了单一重型重子的同胞质量差异。我们认为电磁相互作用和源自上下夸克的质量差异所产生的耐电贡献。相关参数已经由Baryon Octet固定。此外，我们还引入了手性索利顿内部光夸克与手性索利顿和重型夸克之间的库仑相互作用之间的强烈超精细相互作用。数值结果与实验数据非常吻合。特别是，仅包含电磁贡献的中性质量关系的结果与数据非常吻合，这意味着Pion平均野外方法可以很好地描述单一重型重子。
We study the isospin mass differences of singly heavy baryons, based on a pion mean-field approach. We consider both the electromagnetic interactions and the hadronic contributions that arise from the mass difference of the up and down quarks. The relevant parameters have been already fixed by the baryon octet. In addition, we introduce the strong hyperfine interactions between the light quarks inside a chiral soliton and the Coulomb interactions between the chiral soliton and a heavy quark. The numerical results are in good agreement with the experimental data. In particular, the results for the neutral mass relations, which contain only the electromagnetic contributions, are in remarkable agreement with the data, which implies that the pion mean field approach provides a good description of the singly heavy baryons.
