A QCD sum rules calculation of the $J/\psi D_s^{\ast }{D}_s$ strong coupling constant

B. Osório Rodrigues, M. E. Bracco, M. Chiapparini +1

In this work, we calculate the form factors and the coupling constant of the strange-charmed vertex $J/\psi D_s^{\ast }{D}_s$ in the framework of the QCD sum rules by studying their three-poi…