论文标题
\ boldmath {$υ$}和\ boldmath {$η_b$}核物质的质量变化
\boldmath{$Υ$} and \boldmath{$η_b$} mass shifts in nuclear matter
论文作者
论文摘要
我们估计$υ$，$η_b$和$ b^*$梅森质量在对称核问题上发生变化。兴趣是，底部（核物质）和charmonium-（核物质）相互作用的优势是相似的还是不同的。这是因为，通常假定每个（$ j/ψ，υ$）和（$η_c，η_b$）组基于重型魅力和底部的夸克质量具有非常相似的属性。 $υ$的估计是使用SU（5）有效的Lagrangian和异常耦合的估计值，通过研究$ bb $，$ bb^*$和$ b^*b^*b^*$ meson循环供应。至于$η_b$，我们包括$ bb^*$和$ b^*b^*$ meson循环贡献自我能源。 $ b $和$ b^*$梅森的中等质量出现在自我能源中，由夸克 - 梅森耦合模型计算。通过与$ J/ψ$质量转移的相应$ DD，dd^*$和$ DD，dd^*$和$ DD，DD^*$和$ DD^*$ MESON LOOOPS进行比较，对$ bb $，$ bb^*$和$ b^*b^*$ MESON循环进行了分析。我们对$η_b$ shift的预测仅包括最低订单$ bb^*$ meson循环。 $υ$质量转移仅包括$ bb $循环，预计使用$υbb$耦合在核物质饱和密度下为-16至-22 meV，由vector Meson优势模型通过实验数据确定的$υbb$耦合持续不断，而$η_b$ ships则预计$ 75 to $ 82 mev $ 82 mev（5）quecon（5）quecon（5）元（5）que（5）耦合常数。我们的结果表明，底部（核物质）与炭（核物质）相互作用强度之间存在明显差异。我们还研究了$υ$和$η_b$ $质量转移以重型夸克（重型介子）对称限制。
We estimate the $Υ$, $η_b$ and $B^*$ meson mass shifts in symmetric nuclear matter. The interest is, whether the strengths of the bottomonium-(nuclear matter) and charmonium-(nuclear matter) interactions are similar or different. This is because, each ($J/Ψ,Υ$) and ($η_c,η_b$) meson group is usually assumed to have very similar properties based on the heavy charm and bottom quark masses. The estimate for the $Υ$ is made using an SU(5) effective Lagrangian and the anomalous coupling one, by studying the $BB$, $BB^*$, and $B^*B^*$ meson loop contributions for the self-energy. As for the $η_b$, we include the $BB^*$ and $B^*B^*$ meson loop contributions in the self-energy. The in-medium masses of the $B$ and $B^*$ mesons appearing in the self-energy are calculated by the quark-meson coupling model. An analysis on the $BB$, $BB^*$, and $B^*B^*$ meson loops in the $Υ$ mass shift is made by comparing with the corresponding $DD, DD^*$, and $D^*D^*$ meson loops for the $J/Ψ$ mass shift. Our prediction for the $η_b$ mass shift is made including only the lowest order $BB^*$ meson loop. The $Υ$ mass shift, with including only the $BB$ loop, is predicted to be -16 to -22 MeV at the nuclear matter saturation density using the $ΥBB$ coupling constant determined by the vector meson dominance model with the experimental data, while the $η_b$ mass shift is predicted to be -75 to -82 MeV with the SU(5) universal coupling constant determined by the $ΥBB$ coupling constant. Our results show an appreciable difference between the bottomonium-(nuclear matter) and charmonium-(nuclear matter) interaction strengths. We also study the $Υ$ and $η_b$ mass shifts in a heavy quark (heavy meson) symmetry limit.
