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arXiv 1003.2604hep-phnucl-th
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从QCD求和规则得到$D^{*}D ρ$顶点

$D^{*}D ρ$ vertex from QCD sum rules

B. Osorio Rodrigues, M. E. Bracco, M. Nielsen, F. S. Navarra

摘要:

我们在QCD求和规则的框架下计算了$D^{*}D ρ$顶点的形状因子和耦合常数。我们计算了考虑$ D $和$ ρ$介子离壳层时顶点的三点关联函数。得到的形状因子非常不同,但给出相同的耦合常数:$g_{D^{*}D ρ} = 4.1 \pm 0.1$ GeV $^{-1}$。

英文摘要:

We calculate the form factors and the coupling constant in the $D^{*}D ρ$ vertex in the framework of QCD sum rules. We evaluate the three point correlation functions of the vertex considering both $ D $ and $ ρ$ mesons off--shell. The form factors obtained are very different but give the same coupling constant: $g_{D^{*}D ρ} = 4.1 \pm 0.1$ GeV$^{-1}$.

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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