Induced Pseudoscalar Coupling Constant and Light-Cone Sum Rules

1973 ◽  
Vol 8 (12) ◽  
pp. 4532-4544 ◽  
Author(s):  
Duane A. Dicus ◽  
Vigdor L. Teplitz
Keyword(s):  
Light Cone ◽  
Sum Rules ◽  
Coupling Constant ◽  
Pseudoscalar Coupling

THE COUPLING CONSTANT ga0πη AS DERIVED FROM LIGHT-CONE QCD SUM RULES

2004 ◽  
Vol 19 (40) ◽  
pp. 3011-3017 ◽  
Author(s):  
A. GOKALP ◽  
Y. SARAC ◽  
O. YILMAZ
Keyword(s):  
Decay Width ◽  
Light Cone ◽  
Sum Rules ◽  
Coupling Constant ◽  
Physical Processes ◽  
Qcd Sum Rules ◽  
Essential Ingredient

We investigate the a0πη-vertex in the framework of light-cone QCD sum rules. We estimate the coupling constant ga0πη which is an essential ingredient in the analysis of physical processes involving a0(980) meson. We determine the decay width of the a0→π0η decay and compare our result with experimental value.

scholarly journals COUPLING CONSTANT ga0ωγAS DERIVED FROM LIGHT-CONE QCD SUM RULES

2006 ◽  
Vol 21 (16) ◽  
pp. 1297-1303 ◽  
Author(s):  
C. AYDIN ◽  
A. H. YILMAZ
Keyword(s):  
Light Cone ◽  
Sum Rules ◽  
Coupling Constant ◽  
Qcd Sum Rules

We investigate the a0ωγ vertex and estimate the coupling constant ga0ωγin the framework of the light-cone QCD sum rules. We compare our result with the value of the coupling constant calculated in the QCD sum rules.

scholarly journals Light-cone sum rules for proton decay

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Ulrich Haisch ◽  
Amando Hala
Keyword(s):  
Lattice Qcd ◽  
Light Cone ◽  
Sum Rules ◽  
State Of The Art ◽  
Form Factors ◽  
Baryon Number ◽  
Proton Decay ◽  
Matrix Elements ◽  
Decay Channels ◽  
Systematic Uncertainties

Abstract We estimate the form factors that parametrise the hadronic matrix elements of proton-to-pion transitions with the help of light-cone sum rules. These form factors are relevant for semi-leptonic proton decay channels induced by baryon-number violating dimension-six operators, as typically studied in the context of grand unified theories. We calculate the form factors in a kinematical regime where the momentum transfer from the proton to the pion is space-like and extrapolate our final results to the regime that is relevant for proton decay. In this way, we obtain estimates for the form factors that show agreement with the state-of-the-art calculations in lattice QCD, if systematic uncertainties are taken into account. Our work is a first step towards calculating more involved proton decay channels where lattice QCD results are not available at present.

scholarly journals The Radiative Δ(1600) → γN Decay in the Light-Cone QCD Sum Rules

Universe ◽  
2021 ◽  
Vol 7 (8) ◽  
pp. 255
Author(s):  
Haifa I. Alrebdi ◽  
Thabit Barakat
Keyword(s):  
Decay Rate ◽  
Light Cone ◽  
Magnetic Dipole Moment ◽  
Sum Rules ◽  
Electric Quadrupole ◽  
The Other ◽  
Electric Quadrupole Moment ◽  
Multipole Moments ◽  
Qcd Sum Rules ◽  
Strongly Agree

Within the framework of the light-cone QCD sum rules method (LCSR’s), the radiative Δ(1600)→γN decay is studied. In particular, the magnetic dipole moment GM1(0) and the electric quadrupole moment GE1(0) are estimated. We also calculate the ratio REM=−GE1(0)GM1(0) and the decay rate. The predicted multipole moments and the decay rate strongly agree with the existing experimental results as well as with the other available phenomenological approaches.

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