arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1901.04843hep-phnucl-th
收藏

夸克-介子耦合模型中低位底重子的介质内性质

In-medium properties of the low-lying bottom baryons in the quark-meson coupling model

K. Tsushima

摘要:

在夸克-介子耦合(QMC)模型中研究了低能级重子的介质内性质,重点研究了$Σ_b$和$Ξ_b$重子.在中等核物质密度下,$Σ_b$的洛伦兹标量有效质量小于$Ξ_b$的洛伦兹标量有效质量,随着核物质密度的增加,$Σ_b$的洛伦兹标量有效质量小于$Ξ_b$的洛伦兹标量有效质量,即$m^*_{Σ_b} < m^*_{Ξ_b}$,尽管在真空中是$m_{Σ_b} > m_{Ξ_b}$ .我们还研究了排斥洛伦兹矢量势对这些底部重子的激发能的影响。

英文摘要:

In-medium properties of the low-lying baryons are studied in the quark-meson coupling (QMC) model, focusing on the $Σ_b$ and $Ξ_b$ baryons. It is predicted that the Lorentz-scalar effective mass of $Σ_b$ becomes smaller than that of $Ξ_b$ at moderate nuclear matter density, and as the density increases, namely, $m^*_{Σ_b} < m^*_{Ξ_b}$, although in vacuum $m_{Σ_b} > m_{Ξ_b}$. We also study the effects of the repulsive Lorentz-vector potentials on the excitation energies of these bottom baryons.

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。

↑