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arXiv 2407.03377hep-phnucl-thphysics.comp-ph
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核介质中 $B_c, B^{*}_c, B_s, B^{*}_s, D_s$ 和 $D^{*}_s$ 的质量偏移

$B_c, B^{*}_c, B_s, B^{*}_s, D_s$ and $D^{*}_s$ mass shift in a nuclear medium

S. L. P. G. Beres

备注：
Master's thesis
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AI总结：

首次通过计算最低阶单圈自能，估计了对称核物质中双味重介子 $B_c, B_c^*, B_s, B_s^*, D_s$ 和 $D_s^*$ 的负质量偏移，并发现较轻矢量介子激发贡献主导。

摘要：

我们首次估计了对称核物质中双味重介子 $B_c, B_c^*, B_s, B_s^*, D_s$ 和 $D_s^*$ 的在介质质量偏移。这些估计是通过计算最低阶单圈自能来实现的。对称核物质中中间态重轻夸克介子的增强激发是其负质量偏移的根源。我们的结果表明，$B_c$ 介子（$\bar{b} c$ 或 $b \bar{c}$）的质量偏移幅度大于 $\eta_c (\bar{c} c)$ 和 $\eta_b (\bar{b} b)$，这不同于它将介于两者之间的朴素预期。然而，$B_c^*$ 的质量偏移则介于 $J/\psi$ 和 $\Upsilon$ 之间。我们观察到，每个介子自能中较轻的矢量介子激发对相应介子 $B_c, B_s$ 和 $D_s$ 的质量偏移给出了主导贡献。

英文摘要：

For the first time, we estimate the in-medium mass shift of the two-flavored heavy mesons $B_c, B_c^*, B_s, B_s^*, D_s$ and $D_s^*$ in symmetric nuclear matter. The estimates are made by evaluating the lowest order one-loop self-energies. The enhanced excitations of intermediate state heavy-light quark mesons in symmetric nuclear matter are the origin of their negative mass shift. Our results show that the magnitude of the mass shift for the $B_c$ meson ($\bar{b} c$ or $b \bar{c}$) is larger than those of the $η_c (\bar{c} c)$ and $η_b (\bar{b} b)$, different from a naive expectation that it would be in-between of them. While, that of the $B_c^*$ shows the in-between of the $J/ψ$ and $Υ$. We observe that the lighter vector meson excitation in each meson self-energy gives a dominant contribution for the corresponding meson mass shift, $B_c, B_s,$ and $D_s$.

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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