scholarly journals Coupling constant for the J/ψDsDs vertex from QCD sum rules

2014 ◽  
Vol 929 ◽  
pp. 143-156 ◽  
Author(s):  
B. Osório Rodrigues ◽  
M.E. Bracco ◽  
M. Chiapparini
Keyword(s):  
Sum Rules ◽  
Coupling Constant ◽  
Qcd Sum Rules

scholarly journals CALCULATION OF COUPLING CONSTANT gϕπγIN QCD SUM RULES

2004 ◽  
Vol 19 (28) ◽  
pp. 2129-2134 ◽  
Author(s):  
C. AYDIN ◽  
A. H. YILMAZ
Keyword(s):  
Experimental Data ◽  
Sum Rules ◽  
Coupling Constant ◽  
Qcd Sum Rules

The coupling constant of ϕ→π0γ decay is calculated using QCD sum rules. A comparison of our prediction on the coupling constant with the result obtained from analysis of the experimental data is performed.

scholarly journals Analysis of the strong vertices of ΣcND∗ and ΣbNB∗ in QCD sum rules

2018 ◽  
Vol 33 (36) ◽  
pp. 1850217
Author(s):  
Guo-Liang Yu ◽  
Rong-Hua Guan ◽  
Zhi-Gang Wang
Keyword(s):  
Strong Coupling ◽  
Sum Rules ◽  
Form Factors ◽  
Coupling Constants ◽  
Coupling Constant ◽  
Strong Decay ◽  
Qcd Sum Rules ◽  
Dirac Structures ◽  
Analytical Functions ◽  
Perturbative Part

The strong coupling constant is an important parameter that can help us understand the strong decay behaviors of baryons. In our previous work, we have analyzed the strong vertices [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] in QCD sum rules. Following these works, we further analyze the strong vertices [Formula: see text] and [Formula: see text] using the three-point QCD sum rules under Dirac structures [Formula: see text] and [Formula: see text]. In this work, we first calculate strong form-factors considering contributions of the perturbative part and the condensate terms [Formula: see text], [Formula: see text] and [Formula: see text]. Then, these form-factors are used to fit into analytical functions. According to these functions, we finally determine the values of the strong coupling constants for these two vertices [Formula: see text] and [Formula: see text].

scholarly journals Determination of the pion-nucleon coupling constant from QCD sum rules

1996 ◽  
Vol 373 (1-3) ◽  
pp. 9-15 ◽  
Author(s):  
Michael C. Birse ◽  
Boris Krippa
Keyword(s):  
Sum Rules ◽  
Coupling Constant ◽  
Qcd Sum Rules ◽  
Pion Nucleon
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