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arXiv 2412.00515hep-ph
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$B_c$到$D^{(*)}$、$D_{s}^{(*)}$及非轻子衰变形式因子分析

Analysis of the form factors of $B_c\rightarrow D^{(*)}$, $D_{s}^{(*)}$ and their nonleptonic decays

North China Electric Power University(华北电力大学);Southeast University(东南大学)

Bin Wu, Guo-Liang Yu, Zhi-Gang Wang, Ze Zhou, Jie Lu

AI总结:

本文基于三重QCD求和规则计算$B_c$到$D^{*}$、$D$、$D_s^{*}$和$D_s$的形式因子,预测了多个非轻子衰变过程的宽度和分支比,为研究重夸克动力学提供信息。

摘要:

本文致力于在三重QCD求和规则框架下计算$B_c \to D^{*}$、$B_c \to D$、$B_c \to D_s^{*}$和$B_c \to D_s$转换的形式因子。在QCD侧,考虑了$\langle\overline{q}q\rangle$、$\langle\overline{q}g_{s}σGq\rangle$、$\langle g_{s}^{2}G^{2}\rangle$、$\langle f^{3}G^{3}\rangle$和$\langle\overline{q}q\rangle \langle g_{s}^{2}G^{2}\rangle$的贡献。利用得到的形式因子,预测了几个双体非轻子衰变过程$B_c \to η_c D^{*}$、$η_c D$、$ J/ψD^{*}$、$ J/ψD$、$η_c D_s^{*}$、$η_c D_s$、$J/ψD_s^{*}$和$J/ψD_s$的宽度和分支比。这些关于$B_c$介子形式因子和衰变性质的结果为研究重夸克动力学提供了有用信息。

英文摘要:

This article is devoted to calculating the form factors of $B_c \to D^{*}$, $B_c \to D$, $B_c \to D_s^{*}$ and $B_c \to D_s$ transitions in the framework of three-point QCD sum rules. At the QCD side, the contributions of $\langle\overline{q}q\rangle$, $\langle\overline{q}g_{s}σGq\rangle$, $\langle g_{s}^{2}G^{2}\rangle$, $\langle f^{3}G^{3}\rangle$ and $\langle\overline{q}q\rangle \langle g_{s}^{2}G^{2}\rangle$ are taken into account. With the obtained form factors, the decay widths and branching ratios of several two-body nonleptonic decay processes $B_c \to η_c D^{*}$, $η_c D$, $ J/ψD^{*}$, $ J/ψD$, $η_c D_s^{*}$, $η_c D_s$, $J/ψD_s^{*}$ and $J/ψD_s$ are predicted. These results about the form factors and decay properties of $B_c$ meson provide useful information for us to study the heavy-quark dynamics.

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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