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arXiv · hep-ph/0410071

J/psi D*D* vertex from QCD sum rules

M. E. Bracco·M. Chiapparini·M. Nielsen·F. S. Navarra
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Abstract

We calculated the strong form factor and coupling constant for the $J/ψD^* D^*$ vertex in a QCD sum rule calculation. We performed a double Borel sum rule for the three point correlation function of vertex considering both $J/ψ$ and $D^*$ mesons off--shell. The form factors obtained are very different, but they give the same coupling constant.

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M. E. Bracco, M. Chiapparini, M. Nielsen, F. S. Navarra. 2004-11-11. J/psi D*D* vertex from QCD sum rules. https://doi.org/10.1016/j.physletb.2004.11.024

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