$J/ψ$ couplings to open charm mesons from QCD sum rules

Details $J/ψ$ couplings to open charm mesons from QCD sum rules $J/ψ$ couplings to open charm mesons from QCD sum rules

2003-10-23

arxiv.org/abs/hep-ph/0310280v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

gluon condensate included. Version to be published at IJMPE

Scientific paper

We employ QCD sum rules to calculate the $J/\psi$ form factors and coupling constants with charmed mesons, by studying three-point correlation functions. In particular we consider the $J/\psi D^*D$ and $J/\psi DD$ vertices. We determine the momentum dependence of the form factors for kinematical conditions where J/\psi, D or D^* are off-shell. Extrapolating to the pole of each one of the so obtained form factors, we determine the coupling constants. For both couplings our results (within the errors) are compatible with estimates based on constituent quark model.

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