scholarly journals Heavy flavor contributions to QCD sum rules and the running coupling constant

2000 ◽  
Author(s):  
W. L. van Neerven
Keyword(s):  
Sum Rules ◽  
Heavy Flavor ◽  
Coupling Constant ◽  
Qcd Sum Rules ◽  
Running Coupling ◽  
Running Coupling Constant

CALCULATION OF THE K-MESON FORM FACTOR BY MEANS OF THE PRINCIPAL VALUE METHOD

1995 ◽  
Vol 10 (27) ◽  
pp. 2009-2017 ◽  
Author(s):  
SHAHIN S. AGAEV
Keyword(s):  
Wave Function ◽  
Form Factor ◽  
Electromagnetic Form Factor ◽  
Sum Rules ◽  
Coupling Constant ◽  
K Meson ◽  
Running Coupling ◽  
Running Coupling Constant ◽  
Principal Value

The K-meson electromagnetic form factor FK(Q2) is calculated by using the principal value method, which allows one to regulate endpoint ir singularities of QCD running coupling constant αS(Q2xy) (αS(Q2(1−x)(1−y))) in the soft x→0, y→0(x→1, y→1) region by expressing it in terms of the αS(Q2). In calculations the K-meson sum rules wave function is used.

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 THE GROSS–NEVEU MODEL ON THE LIGHT-CONE

1995 ◽  
Vol 10 (06) ◽  
pp. 525-537 ◽  
Author(s):  
IGOR PESANDO
Keyword(s):  
Light Cone ◽  
Bound State ◽  
State Equation ◽  
Coupling Constant ◽  
Normal Ordering ◽  
Running Coupling ◽  
Running Coupling Constant ◽  
Light Cone Quantization ◽  
Gross Neveu Model

We consider the (massive) Gross–Neveu model using the light-cone quantization where we solve the constraints explicitly. We show that the vacuum is trivial and that the quantization fails when m = 0. We show that the running coupling constant emerges as a pure normal ordering effect and we discuss the bound state equation.

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