Analysis of the strong coupling form factors of &sum;bNB and&sum;cND in QCD sum rules

Guo-Liang Yu; Zhi-Gang Wang; Zhen-Yu Li

doi:10.1088/1674-1137/41/8/083104

Chinese Physics C> 2017, Vol. 41> Issue(8) : 083104 DOI: 10.1088/1674-1137/41/8/083104

Analysis of the strong coupling form factors of ∑_bNB and∑_cND in QCD sum rules

1.
Department of Mathematics and Physics, North China Electric Power University, Baoding 071003, China
2.
School of Physics and Electronic Science, Guizhou Normal College, Guiyang 550018, China

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Abstract：
In this article, we study the strong interaction of the vertices ∑_bNB and ∑_cND 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 vertices are calculated. Then, we fit the form factors into analytical functions and extrapolate them into time-like regions, which gives the coupling constants. Our analysis indicates that the coupling constants for these two vertices are G_{∑_bNB}=0.43±0.01 GeV^-1 and G_{∑_cND}=3.76±0.05 GeV^-1.
- sum rules ,
- coupling constants ,
- baryons

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Guo-Liang Yu, Zhi-Gang Wang and Zhen-Yu Li. Analysis of the strong coupling form factors of ∑_bNB and∑_cND in QCD sum rules[J]. Chinese Physics C, 2017, 41(8): 083104. doi: 10.1088/1674-1137/41/8/083104

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Received: 2017-03-14

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Supported by Fundamental Research Funds for the Central Universities (2016MS133)

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Analysis of the strong coupling form factors of ∑_bNB and∑_cND in QCD sum rules

Corresponding author: Guo-Liang Yu,

Corresponding author: Zhi-Gang Wang,

1. Department of Mathematics and Physics, North China Electric Power University, Baoding 071003, China

2. School of Physics and Electronic Science, Guizhou Normal College, Guiyang 550018, China

Received Date: 2017-03-14

Available Online: 2017-08-05

Fund Project: Supported by Fundamental Research Funds for the Central Universities (2016MS133)

Abstract: In this article, we study the strong interaction of the vertices ∑_bNB and ∑_cND 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 vertices are calculated. Then, we fit the form factors into analytical functions and extrapolate them into time-like regions, which gives the coupling constants. Our analysis indicates that the coupling constants for these two vertices are G_{∑_bNB}=0.43±0.01 GeV^-1 and G_{∑_cND}=3.76±0.05 GeV^-1.

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Analysis of the strong coupling form factors of ∑_bNB and∑_cND in QCD sum rules

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Analysis of the strong coupling form factors of ∑_bNB and∑_cND in QCD sum rules

Corresponding author: Guo-Liang Yu,

Corresponding author: Zhi-Gang Wang,

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