scholarly journals Timelike-helicity B→ππ form factor from light-cone sum rules with dipion distribution amplitudes

2017 ◽  
Vol 96 (5) ◽  
Author(s):  
Shan Cheng ◽  
Alexander Khodjamirian ◽  
Javier Virto
Keyword(s):  
Form Factor ◽  
Light Cone ◽  
Sum Rules

scholarly journals Scalar form factor of the proton with light-cone QCD sum rules

2006 ◽  
Vol 73 (9) ◽  
Author(s):  
Zhi-Gang Wang ◽  
Shao-Long Wan ◽  
Wei-Min Yang
Keyword(s):  
Form Factor ◽  
Light Cone ◽  
Sum Rules ◽  
Scalar Form Factor ◽  
Qcd Sum Rules ◽  
Scalar Form

scholarly journals B−πweak form factor with chiral current in the light-cone sum rules

2003 ◽  
Vol 67 (9) ◽  
Author(s):  
Zhi-Gang Wang ◽  
Ming-Zhen Zhou ◽  
Tao Huang
Keyword(s):  
Form Factor ◽  
Light Cone ◽  
Sum Rules

scholarly journals Form factor for B→Dlν˜ in the light-cone sum rules with chiral current correlator

2006 ◽  
Vol 641 (2) ◽  
pp. 177-182 ◽  
Author(s):  
Fen Zuo ◽  
Zuo-Hong Li ◽  
Tao Huang
Keyword(s):  
Form Factor ◽  
Light Cone ◽  
Sum Rules

scholarly journals ELECTROMAGNETIC FORM-FACTOR OF THE π MESON WITH LIGHT-CONE QCD SUM RULES

2008 ◽  
Vol 23 (27n28) ◽  
pp. 4621-4636 ◽  
Author(s):  
ZHI-GANG WANG ◽  
ZHI-BIN WANG
Keyword(s):  
Experimental Data ◽  
Form Factor ◽  
Momentum Transfer ◽  
Electromagnetic Form Factor ◽  
Light Cone ◽  
Sum Rules ◽  
Large Momentum ◽  
Normalization Condition ◽  
Qcd Sum Rules ◽  
Zero Momentum

In this paper, we calculate the electromagnetic form-factor of the π meson with the light-cone QCD sum rules. The numerical value [Formula: see text] is in excellent agreement with the experimental data (extrapolated to the limit of zero momentum transfer or the normalization condition Fπ(0) = 1). For large momentum transfers, the values from the two sum rules are all comparable with the experimental data and theoretical estimations.

scholarly journals Pion-photon transition form factor in light-cone sum rules

2012 ◽  
Author(s):  
A. V. Pimikov ◽  
A. P. Bakulev ◽  
S. V. Mikhailov ◽  
N. G. Stefanis
Keyword(s):  
Form Factor ◽  
Light Cone ◽  
Transition Form Factor ◽  
Sum Rules ◽  
Transition Form ◽  
Photon Transition

scholarly journals PION TRANSITION FORM FACTOR AT THE TWO-LOOP LEVEL VIS-À-VIS EXPERIMENTAL DATA

2009 ◽  
Vol 24 (35n37) ◽  
pp. 2858-2867 ◽  
Author(s):  
S. V. MIKHAILOV ◽  
N. G. STEFANIS
Keyword(s):  
Experimental Data ◽  
Perturbation Theory ◽  
Form Factor ◽  
Light Cone ◽  
Transition Form Factor ◽  
Sum Rules ◽  
Leading Order ◽  
Transition Form ◽  
Qcd Sum Rules ◽  
Theoretical Results

We use light-cone QCD sum rules to calculate the pion-photon transition form factor, taking into account radiative corrections up to the next-to-next-to-leading order of perturbation theory. We compare the obtained predictions with all available experimental data from the CELLO, CLEO, and the BaBar Collaborations. We point out that the BaBar data are incompatible with the convolution scheme of QCD, on which our predictions are based, and can possibly be explained only with a violation of the factorization theorem. We pull together recent theoretical results and comment on their significance.

THE FORM FACTOR OF ργ*→π0IN THE FINITE-WIDTH LIGHT-CONE LOCAL DUALITY SUM RULE

2012 ◽  
Vol 21 (04) ◽  
pp. 1250048
Author(s):  
MINGHAI LI ◽  
JUEPING LIU
Keyword(s):  
Form Factor ◽  
Light Cone ◽  
Asymptotic Form ◽  
Sum Rules ◽  
Absorptive Part ◽  
Finite Width ◽  
Transition Form ◽  
Sum Rule ◽  
Local Duality ◽  
The Difference

The form factor of the transition ργ*→π0is investigated by analyzing the γγ*→π0transition in the framework of the light-cone local duality quantum chromodynamics sum rules. Both finite- and zero-width forms for the low-energy physical absorptive part of the γγ*→π0transition are considered. The numerical results for the transition form factor Fρπ(Q2) in the asymptotic form and the CZ one of the pion distribution amplitude are obtained respectively, the difference between the finite- and zero-width form is not big but still distinguishable. It is found that the results for the form factor Fρπ(Q2) from CZ, asymptotic and the flat pion DAs are compatible with the predictions of perturbative QCD. Our results will be helpful to distinguish the shape of the pion DA of twist-two, when the concrete information of the experimental data for the transition ργ*→π0are provided.

scholarly journals Estimation of Nucleon D-Term in QCD

Particles ◽  
2019 ◽  
Vol 2 (3) ◽  
pp. 357-364 ◽  
Author(s):  
Igor V. Anikin
Keyword(s):  
Experimental Data ◽  
Form Factor ◽  
Light Cone ◽  
Sum Rules ◽  
Leading Order

Using the light-cone sum rules at leading order, we present an approach to perform the preliminary upper estimation for the nucleon gravitational form factor D ( t ) (D-term contribution). Comparison with the experimental data and with the results of different models is discussed.

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