scholarly journals Couplings of pions with excited heavy mesons from light-cone QCD sum rules in the leading order of HQET

1999 ◽  
Vol 6 (2) ◽  
pp. 307-311 ◽  
Author(s):  
Y.-B. Dai ◽  
S.-L. Zhu
Keyword(s):  
Light Cone ◽  
Sum Rules ◽  
Leading Order ◽  
Qcd Sum Rules ◽  
Heavy Mesons

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.

scholarly journals Erratum: Decay widths of excited heavy mesons from QCD sum rules at the leading order of HQET [Phys. Rev. D58, 094032 (1998)]

1999 ◽  
Vol 59 (5) ◽  
Author(s):  
Yuan-Ben Dai ◽  
Chao-Shang Huang ◽  
Ming-Qiu Huang ◽  
Hong-Ying Jin ◽  
Chun Liu
Keyword(s):  
Sum Rules ◽  
Leading Order ◽  
Qcd Sum Rules ◽  
Heavy Mesons ◽  
Decay Widths

scholarly journals Decay widths of excited heavy mesons from QCD sum rules at the leading order of HQET

1998 ◽  
Vol 58 (9) ◽  
Author(s):  
Yuan-Ben Dai ◽  
Chao-Shang Huang ◽  
Ming-Qiu Huang ◽  
Hong-Ying Jin ◽  
Chun Liu
Keyword(s):  
Sum Rules ◽  
Leading Order ◽  
Qcd Sum Rules ◽  
Heavy Mesons ◽  
Decay Widths

scholarly journals SEMILEPTONIC B(Bs, Bc) DECAYS IN THE LIGHT-CONE QCD SUM RULES

2008 ◽  
Vol 23 (21) ◽  
pp. 3237-3245 ◽  
Author(s):  
TAO HUANG ◽  
ZUO-HONG LI ◽  
XING-GANG WU ◽  
FEN ZUO
Keyword(s):  
Light Cone ◽  
Sum Rules ◽  
Form Factors ◽  
Weak Form ◽  
Branching Ratios ◽  
Qcd Sum Rules ◽  
Decay Modes ◽  
Heavy Mesons ◽  
Decay Widths ◽  
Model Approach

Semileptonic B(Bs, Bc) decays are investigated systematically in the light-cone QCD sum rules. Special emphasis is put on the LCSR calculation on weak form factors with an adequate chiral current correlator, which turns out to be particularly effective to control the pollution by higher twist components of spectator mesons. The result for each channel depends on the distribution amplitude of the the producing meson. The leading twist distribution amplitudes of the related heavy mesons and charmonium are worked out by a model approach in the reasonable way. A practical scenario is suggested to understand the behavior of weak form factors in the whole kinematically accessible ranges. The decay widths and branching ratios are estimated for several B(Bc) decay modes of current interest.

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