1,886 research outputs found
Analysis of the semileptonic transitions and non-leptonic decay in the AdS/QCD correspondence
We consider the axial-vector mesons and as a mixture
of two and states with the mixing angle
that equal to . We calculate the light-front
distribution amplitudes (LFDAs) and decay constant formulas for both the
axial-vector mesons in the AdS/QCD correspondence. The transition form
factors of the semileptonic decays are derived in terms of the LFDAs
for mesons. Using these form factors and decay constant values, the
differential branching ratios of ,~ transitions are plotted with respect to the
four-momentum transfer squared, . In addition, the branching ratio values
of these decays and the non-leptonic decays are
estimated. A comparison is made between our results for the branching ratios of
decays in the AdS/QCD model and predictions
obtained from the light-cone sum rules (LCSR) as well as the experimental
values. Finally, the forward-backward asymmetries for the aforementioned
semileptonic decays are plotted on in both the AdS/QCD correspondence and
two Higgs doublet model (2HDM) in order to test the standard model (SM) and
search for the new physics (NP).Comment: 16 pages, 6 figure
Analysis of and vertices and branching ratio of
In this paper, the strong form factors and coupling constants of
and vertices are investigated within the three-point QCD sum rules
method with and without the symmetry. In this calculation, the
contributions of the quark-quark, quark-gluon, and gluon-gluon condensate
corrections are considered. As an example of specific application of these
coupling constants, the branching ratio of the hadronic decay is analyzed based on the one-particle-exchange which is one of the
phenomenological models. In this model, decays into a
intermediate state, and then these two particles exchange a producing
the final and mesons. In order to compute the effect of these
interactions, the and form factors are needed.Comment: 14 pages, 8 figures. arXiv admin note: substantial text overlap with
arXiv:1509.0171
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