The form factors and coupling constants of the meson vertices J/\psi D_s D_s and \phi D_s D_s were calculated using three point correlation functions within the QCD Sum Rules formalism. We have considered the cases where \phi, D_s and J/\psi mesons are off-shell obtaining, for each vertex, two different form factors and its corresponding coupling constants, namely g_{ J/\psi D_s D_s} = 6.20^{ +0.97}_{ -1.15} and g_{ \phi D_s D_s} = 1.85^{ +0.22}_{ -0.23}.
Categories: hep-ph