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arXiv 1109.2180hep-ph
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用QCD求和规则分析核物质中的$Σ_Q$重子

Analysis of the $Σ_Q$ baryons in the nuclear matter with the QCD sum rules

Zhi-Gang Wang

摘要:

本文推广了我们以前的工作,利用QCD求和规则研究了核物质中的$Σ$型重子$Σ_c$和$Σ_b$,得到了核物质中质量$M_{Σ_Q}^*$、矢量自能$Σ_v$和极残基$λ^*_{Σ_Q}$的三个耦合QCD求和规则.然后考虑不同旋量结构的不等极余子的影响,将真空中QCD求和规则的质量归一化到实验数据中,得到了核物质的质量位移$δM_{Σ_c}=-123\,\rm{MeV}$和$δM_{Σ_b}=-375\,\rm{MeV}$.

英文摘要:

In this article, we extend our previous work to study the $Σ$-type heavy baryons $Σ_c$ and $Σ_b$ in the nuclear matter using the QCD sum rules, and obtain three coupled QCD sum rules for the masses $M_{Σ_Q}^*$, vector self-energies $Σ_v$ and pole residues $λ^*_{Σ_Q}$ in the nuclear matter. Then we take into account the effects of the unequal pole residues from different spinor structures, and normalize the masses from the QCD sum rules in the vacuum to the experimental data, and obtain the mass-shifts $δM_{Σ_c}=-123\,\rm{MeV}$ and $δM_{Σ_b}=-375\,\rm{MeV}$ in the nuclear matter.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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