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arXiv 1608.03460hep-ph
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QCD求和规则中Σ_bNB和Σ_cND强耦合形状因子的分析

Analysis of the strong coupling form factors of $Σ_bNB$ and $Σ_c ND$ in QCD sum rules

Guo Liang Yu, Zhi Gang Wang, Zhen Yu Li

AI总结:

本文通过三点QCD求和规则分析Σ_bNB和Σ_cND顶点,考虑维度5真空凝聚并外推形状因子,得到耦合常数0.43±0.01 GeV^{-1}和3.76±0.05 GeV^{-1}。

摘要:

本文利用三点QCD求和规则,在两种不同的Dirac结构下研究顶点Σ_bNB和Σ_cND的强相互作用。在算符乘积展开中考虑最高维度为5的真空凝聚贡献,计算了这些顶点的形状因子。随后,我们将形状因子拟合成解析函数,并将其外推至类时区域,从而得到耦合常数。分析结果表明,这两个顶点的耦合常数分别为G_{Σ_bNB}=0.43±0.01 GeV^{-1}和G_{Σ_cND}=3.76±0.05 GeV^{-1}。

英文摘要:

In this article, we study the strong interaction of the vertexes $Σ_bNB$ and $Σ_c ND$ using the three-point QCD sum rules under two different dirac structures. Considering the contributions of the vacuum condensates up to dimension $5$ in the operation product expansion, the form factors of these vertexes are calculated. Then, we fit the form factors into analytical functions and extrapolate them into time-like regions, which giving the coupling constant. Our analysis indicates that the coupling constant for these two vertexes are $G_{Σ_bNB}=0.43\pm0.01GeV^{-1}$ and $G_{Σ_cND}=3.76\pm0.05GeV^{-1}$.

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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