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

R. D. Matheus·F. S. Navarra·M. Nielsen·R. Rodrigues da Silva
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Abstract

We employ QCD sum rules to calculate the $J/ψ$ form factors and coupling constants with charmed mesons, by studying three-point correlation functions. In particular we consider the $J/ψD^*D$ and $J/ψDD$ vertices. We determine the momentum dependence of the form factors for kinematical conditions where J/ψ, 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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R. D. Matheus, F. S. Navarra, M. Nielsen, R. Rodrigues da Silva. 2004-08-03. $J/ψ$ couplings to open charm mesons from QCD sum rules. https://arxiv.org/abs/hep-ph/0310280

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