Calculation of coupling constants and decay width of light meson with kaon from QCD sum rules

2017 ◽  
Vol 96 (3) ◽  
Author(s):  
E. Kazemi ◽  
N. Ghahramany
Keyword(s):  
Decay Width ◽  
Sum Rules ◽  
Coupling Constants ◽  
Light Meson ◽  
Qcd Sum Rules

scholarly journals Strong decays of heavy tensor mesons in QCD sum rules

2016 ◽  
Vol 31 (06) ◽  
pp. 1650036 ◽  
Author(s):  
Zhen-Yu Li ◽  
Zhi-Gang Wang ◽  
Guo-Liang Yu
Keyword(s):  
Decay Width ◽  
Sum Rules ◽  
Order Approximation ◽  
Coupling Constants ◽  
Leading Order ◽  
Strong Decay ◽  
Qcd Sum Rules ◽  
Consistent Description ◽  
Decay Widths ◽  
Tensor Formula

In this paper, the tensor–vector–pseudoscalar (TVP) type of vertices are analyzed with the QCD sum rules (QCDSR) and the local-QCD sum rules (SR) in the leading-order approximation and the hadronic coupling constants [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] together with the corresponding decay widths are then calculated. The results indicate that QCDSR as well as the local-QCDSR give a consistent description. The calculated strong decay widths and decay width ratios are compared with the available experimental and other theoretical values. Finally, the total widths [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] are discussed in detail. The results show that these total widths are underestimated, especially for the tensor [Formula: see text] and [Formula: see text] mesons where the obtained predictions are almost a factor of 2 lower than measured decay widths.

scholarly journals Heavy-light meson decay constant from QCD sum rules in the three-loop approximation

2002 ◽  
Vol 65 (5) ◽  
Author(s):  
A. A. Penin ◽  
M. Steinhauser
Keyword(s):  
Decay Constant ◽  
Sum Rules ◽  
Light Meson ◽  
Meson Decay ◽  
Qcd Sum Rules ◽  
Loop Approximation

QCD sum rules for the coupling constants g KYN and g KYΞ

2007 ◽  
Vol 70 (5) ◽  
pp. 925-937
Author(s):  
T. Aliev ◽  
V. S. Zamiralov ◽  
S. N. Lepshokov ◽  
A. Özpineci ◽  
S. B. Yakovlev
Keyword(s):  
Sum Rules ◽  
Coupling Constants ◽  
Qcd Sum Rules

Strong Coupling Constants of the Octet Baryons to K and π Mesons in Light Cone QCD Sum Rules

2007 ◽  
Author(s):  
T. M. Aliev ◽  
A. Ozpineci ◽  
S. Yakovlev ◽  
V. S. Zamiralov ◽  
Pietro Colangelo ◽  
...  
Keyword(s):  
Strong Coupling ◽  
Light Cone ◽  
Sum Rules ◽  
Coupling Constants ◽  
Qcd Sum Rules ◽  
Octet Baryons

scholarly journals Analysis of the strong vertices of Σc∗ND and Σb∗NB in QCD sum rules

2017 ◽  
Vol 32 (35) ◽  
pp. 1750203 ◽  
Author(s):  
Guo-Liang Yu ◽  
Zhi-Gang Wang ◽  
Zhen-Yu Li
Keyword(s):  
Strong Coupling ◽  
Sum Rules ◽  
Form Factors ◽  
Coupling Constants ◽  
Strong Interactions ◽  
Dirac Structure ◽  
Qcd Sum Rules ◽  
Analytical Functions ◽  
Heavy Baryons ◽  
Perturbative Part

The strong coupling constants not only are important to understand the strong interactions of the heavy baryons, but can also help us reveal the nature and structure of these baryons. Additionally, researchers indeed have made great efforts to calculate some of the strong coupling constants, [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], etc. In this paper, we analyze the strong vertices [Formula: see text] and [Formula: see text] using the three-point QCD sum rules under the Dirac structure of [Formula: see text]. We perform our analysis by considering the contributions of the perturbative part and the condensate terms of [Formula: see text] and [Formula: see text]. After the form factors are calculated, they are then fitted into analytical functions which are used to get the strong coupling constants for these two vertices. The final results are [Formula: see text] and [Formula: see text].

scholarly journals Investigation of the Rare ExclusiveBc*→Dsνν-Decays in the Framework of the QCD Sum Rules

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
V. Bashiry
Keyword(s):  
Correlation Function ◽  
Decay Width ◽  
Sum Rules ◽  
Branching Ratio ◽  
Form Factors ◽  
Gluon Condensate ◽  
Qcd Sum Rules

ExclusiveBc*→Dsνν-decay is studied in the framework of the three-point QCD sum rules approach. The two gluon condensate contributions to the correlation function are calculated and the form factors of this transition are found. The decay width and total branching ratio for this decay are also calculated.

NON-PERTURBATIVE QCD CHARGE ASYMMETRIC CORRECTIONS TO THE NN SCATTERING LENGTHS

1989 ◽  
Vol 04 (08) ◽  
pp. 713-719
Author(s):  
RIAZUDDIN ◽  
FAYYAZUDDIN
Keyword(s):  
Sum Rules ◽  
Experimental Information ◽  
Coupling Constants ◽  
The Other ◽  
Nuclear Forces ◽  
Charge Symmetry Breaking ◽  
Qcd Sum Rules ◽  
Charge Symmetry ◽  
Light Baryon ◽  
Scattering Lengths

The effect of the vacuum asymmetry [Formula: see text] on π0pp and π0nn coupling constants has been estimated in the QCD sum rules approach. This effect can contribute to charge symmetry breaking in nuclear forces (CSB). The experimental information on CSB is used to estimate εd and the other vacuum asymmetry. [Formula: see text]. It is shown that the values of εs larger than 0.3 still allowed by QCD sum rules in light baryon and meson sectors are not possible.

scholarly journals Vector meson-baryon strong coupling constants in light cone QCD sum rules

2009 ◽  
Vol 80 (1) ◽  
Author(s):  
T. M. Aliev ◽  
A. Özpineci ◽  
M. Savcı ◽  
V. S. Zamiralov
Keyword(s):  
Vector Meson ◽  
Strong Coupling ◽  
Light Cone ◽  
Sum Rules ◽  
Coupling Constants ◽  
Qcd Sum Rules

scholarly journals Pertinent Dirac structure for QCD sum rules of meson-baryon coupling constants

2000 ◽  
Vol 62 (5) ◽  
Author(s):  
Takumi Doi ◽  
Hungchong Kim ◽  
Makoto Oka
Keyword(s):  
Sum Rules ◽  
Coupling Constants ◽  
Dirac Structure ◽  
Qcd Sum Rules

scholarly journals Strong Coupling Constants of Negative Parity Heavy Baryons with π and K Mesons

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
T. M. Aliev ◽  
S. Bilmis ◽  
M. Savci
Keyword(s):  
Strong Coupling ◽  
Light Cone ◽  
Sum Rules ◽  
Negative Parity ◽  
Coupling Constants ◽  
Positive Parity ◽  
Qcd Sum Rules ◽  
Heavy Baryons ◽  
K Mesons

The strong coupling constants of negative parity heavy baryons belonging to sextet and antitriplet representations of SUf(3) with light π and K mesons are estimated within the light cone QCD sum rules. It is observed that each class of the sextet-sextet, sextet-antitriplet, and antitriplet-antitriplet transitions can be described by only one corresponding function. The pollution arising from the positive to positive, positive to negative, and negative to positive parity baryons transitions is eliminated by constructing sum rules for different Lorentz structures. The obtained coupling constants are compared with the ones for the positive parity heavy baryons.

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