Calculation of coupling constants and decay width of light meson with kaon from QCD sum rules

Coupling constants calculation of charmed meson with kaon from QCD sum rules

“…Determination of the strong coupling constants helps us to better understand, the nature of the strong interactions and hadronic phenomena that are described by the nonperturbative QCD approach. QCD sum rules(QCDSR) [1] are among the most interesting approaches at the low-energy region that have determined many successful calculations about the mesonic vertices such as D * Dπ [2,3], DDρ [4], D * D * ρ [5], DDJ/ψ [6], D * DJ/ψ [7], s DK [12], DDω [13], φD * s0 D * s0 , φD s D s , φD * s D * s , φD s1 D s1 [14], B s0 BK [15] [18], K * Kπ, φKK, φK * K * , ρK * K * [19], [20].…”