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arXiv 1605.02496hep-ph
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QCD光锥求和规则在四夸克态中的应用:强顶点$X_bX_bρ$和$X_cX_cρ$

Application of the QCD light cone sum rule to tetraquarks: the strong vertices $X_bX_bρ$ and $X_cX_cρ$

S. S. Agaev, K. Azizi, H. Sundu

摘要:

本文将完整版的QCD光锥求和规则方法应用于含单个重$b$或$c$夸克的四夸克态。为此,我们对强顶点$X_{b}X_{b}ρ$和$X_{c}X_{c}ρ$进行了研究,其中$X_b=[su][\bar b\bar d]$和$X_c=[su][\bar c\bar d]$是由四个不同味夸克构成的奇异态.利用$ρ$介子前导分布和高扭曲分布振幅,得到了对应于这些顶点的强耦合常数$G_{X_{b}X_{b}ρ}$和$G_{X_{c}X_{c}ρ}$.在计算中,将$X_{b}$和$X_{c}$作为双夸克和反双夸克的标量束缚态处理。

英文摘要:

The full version of QCD light-cone sum rule method is applied to tetraquarks containing a single heavy $b$ or $c$ quark. To this end, investigations of the strong vertices $X_{b}X_{b}ρ$ and $X_{c}X_{c}ρ$ are performed, where $X_b=[su][\bar b\bar d]$ and $X_c=[su][\bar c\bar d]$ are the exotic states built of four quarks of different flavors. The strong coupling constants $G_{X_{b}X_{b}ρ}$ and $G_{X_{c}X_{c}ρ}$ corresponding to these vertices are found using the $ρ$-meson leading and higher-twist distribution amplitudes. In the calculations $X_{b}$ and $X_{c}$ are treated as scalar bound states of a diquark and antidiquark.

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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