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

Published 1 Oct 2012 in hep-ph | (1210.0471v1)

Abstract: 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}.}