scholarly journals The $$D_sDK^*$$ Vertex in QCD Sum Rules: Form Factors and Coupling Constant

2021 ◽  
Vol 52 (1) ◽  
Author(s):  
A. Cerqueira Jr ◽  
B. Osório Rodrigues ◽  
M. E. Bracco ◽  
C. M. Zanetti
Keyword(s):  
Sum Rules ◽  
Form Factors ◽  
Coupling Constant ◽  
Qcd Sum Rules

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 ANALYSIS OF THE $B \to K^*_2(1430), a_2(1320), f_2(1270)$ FORM-FACTORS WITH LIGHT-CONE QCD SUM RULES

2011 ◽  
Vol 26 (37) ◽  
pp. 2761-2782 ◽  
Author(s):  
ZHI-GANG WANG
Keyword(s):  
Experimental Data ◽  
Light Cone ◽  
B Meson ◽  
Sum Rules ◽  
Form Factors ◽  
Distribution Amplitude ◽  
Qcd Sum Rules ◽  
Line Shapes ◽  
The Future

In this paper, we study the [Formula: see text] form-factors with the light-cone QCD sum rules, where the B-meson light-cone distribution amplitudes are used. In calculations, we observe that the line-shapes of the B-meson light-cone distribution amplitude ϕ+(ω) have significant impacts on the values of the form-factors, and expect to obtain severe constraints on the parameters of the B-meson light-cone distribution amplitudes from the experimental data in the future.

scholarly journals Analysis of the strong coupling form factors of Σ b NB and Σ c ND in QCD sum rules

2017 ◽  
Vol 41 (8) ◽  
pp. 083104 ◽  
Author(s):  
Guo-Liang Yu ◽  
Zhi-Gang Wang ◽  
Zhen-Yu Li
Keyword(s):  
Strong Coupling ◽  
Sum Rules ◽  
Form Factors ◽  
Qcd Sum Rules

scholarly journals Semileptonic Decays ofB(Bs)to Light Tensor Mesons

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Reza Khosravi ◽  
S. Sadeghi
Keyword(s):  
Sum Rules ◽  
Form Factors ◽  
Semileptonic Decays ◽  
Branching Ratios ◽  
Quark Condensate ◽  
Qcd Sum Rules ◽  
Frame Work ◽  
The Continuum

The semileptonicBs(B)→K2⁎(a2,f2)lν,l=τ,μ, transitions are investigated in the frame work of the three-point QCD sum rules. Considering the quark condensate contributions, the relevant form factors of these transitions are estimated. The branching ratios of these channel modes are also calculated at different values of the continuum thresholds of the tensor mesons and compared with the obtained data for other approaches.

scholarly journals ANALYSIS OF THE $B_q\to D_q(D_q^*)P$ AND $B_q\to D_q(D_q^*)V$ DECAYS WITHIN THE FACTORIZATION APPROACH IN QCD

2009 ◽  
Vol 24 (31) ◽  
pp. 5845-5860 ◽  
Author(s):  
K. AZIZI ◽  
R. KHOSRAVI ◽  
F. FALAHATI
Keyword(s):  
Experimental Data ◽  
Perturbative Qcd ◽  
Sum Rules ◽  
Branching Fraction ◽  
Form Factors ◽  
Transition Form ◽  
Qcd Sum Rules ◽  
Factorization Approach ◽  
Electroweak Penguin ◽  
Decay Widths

Using the factorization approach and considering the contributions of the current–current, QCD penguin and electroweak penguin operators at the leading approximation, the decay amplitudes and decay widths of [Formula: see text] and [Formula: see text] transitions, where q = u, d, s and P and V are pseudoscalar and vector mesons, are calculated in terms of the transition form factors of the Bq→Dq and [Formula: see text]. Having computed those form factors in three-point QCD sum rules, the branching fraction for these decays are also evaluated. A comparison of our results with the predictions of the perturbative QCD as well as the existing experimental data is presented.

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 Light cone QCD sum rules analysis of the axial transition form factors

2008 ◽  
Vol 799 (1-4) ◽  
pp. 105-126 ◽  
Author(s):  
T.M. Aliev ◽  
K. Azizi ◽  
A. Ozpineci
Keyword(s):  
Light Cone ◽  
Sum Rules ◽  
Form Factors ◽  
Transition Form ◽  
Qcd Sum Rules
Sign in / Sign up

Export Citation Format

Share Document