Obtaining the strong coupling constants g_{J/ψD_s D_s} and g_{ϕD_s D_s} from QCD Sum Rules

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

No reviews yet.

No comments yet.